REZNOR ErP2021 Photon Gas Fired Unit Heater Instruction Manual

REZNOR ErP2021 Photon Gas Fired Unit Heater

Product Information

The PHOTON Gas Fired Unit Heater is a high-efficiency heating appliance that meets the ErP Lot 21 Seasonal Efficiency and 2021 NOx compliant standards. It is designed for use in non-domestic installations and is CE and UKCA certified to EN17082.

This product complies with various EC directives including Gas Appliances (Product Safety and Metrology etc (Amendment etc) (EU Exit) Regulations 2019), the Eco design for Energy-Related Products and Energy Information (Amendment) (EU Exit) Regulations 2020, Electromagnetic Compatibility Regulations 2016, Electrical Equipment (Safety) Regulations 2016, Supply of Machinery (Safety) Regulations 2008, and Supply of Machinery (Safety) Regulations (A) 2011.

Please note that improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. It is essential that all work related to this product is carried out by appropriately qualified individuals.

Product Usage Instructions

Before commencing installation, commissioning, or servicing of the PHOTON Gas Fired Unit Heater, please read this manual carefully. After installation, leave a copy of this manual with the end user or site agent to be placed in their premises technical file.

WARNING: To avoid dangerous operation and potential damage to the unit and its environment, ensure that all regulations concerning the connection of the apparatus are strictly observed.

General Information

The PHOTON range offers efficient heating solutions for non-domestic installations. This manual provides essential information for using and maintaining the unit. It includes warranty details and important notices for installers. Please refer to this manual for comprehensive guidance.

Technical Data

The manual contains technical data, dimension diagrams, and tables to assist with the installation process. It provides information on combustion air, flue and gas connections, as well as clearance distances required for safe operation.

Installation

Follow the instructions provided in the manual for proper installation of the PHOTON Gas Fired Unit Heater. Ensure that all necessary pre-start checks are performed before starting up the unit.

Commissioning and Operation
Once the installation is complete, follow the commissioning procedures outlined in the manual. This includes adjusting air/gas ratio controls, gas valve adjustment, and gas conversion if necessary. Perform commissioning checks and ensure a smooth handover to the end user.

The manual also provides instructions for operating the unit on a day-to-day basis.

Maintenance and Servicing
Regular maintenance is essential for optimal performance and longevity of the PHOTON Gas Fired Unit Heater. The manual provides guidance on maintenance and servicing tasks to be performed at specified intervals.

Fault Finding

If any issues arise with the unit, refer to the fault finding section of the manual. It provides troubleshooting steps to identify and resolve common problems.

Spare Parts
A list of spare parts for the PHOTON Gas Fired Unit Heater is included in the manual. Use this information to order replacement parts when needed.

ErP Table

The manual includes an ErP table that provides information on the energy efficiency of the unit for different gas types (G20, G25, G25.3).

ErP ErP Lot 21 Seasonal Efficiency and
2021 NOx compliant
PHOTON

GAS FIRED UNIT HEATER
INSTALLATION, COMMISSIONING AND SERVICING MANUAL
These appliances meet the following EC directives: Gas Appliances (Product Safety and Metrology etc (Amendment etc) (EU Exit) Regulations 2019)
The Eco design for Energy-Related Products and Energy Information (Amendment) (EU Exit) Regulations 2020
Electromagnetic Compatibility Regulations 2016 Electrical Equipment (Safety) Regulations 2016 Supply of Machinery (Safety) Regulations 2008 Supply of Machinery (Safety) Regulations (A) 2011
Please read this document carefully before commencing installation, commissioning and/or servicing. Leave it with the end user/site agent to be placed in their premises technical file after installation. WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. All work must be carried out by appropriately qualified persons.
The manufacturer does not take any responsibility in the event of non- observance of the regulations concerning the connection of the apparatus causing a dangerous operation possibly resulting in damage to the apparatus and/or environment in which the unit is installed.
PH45-LITKIT-UK Literature Kit UK
MANUAL PART NO. D301310 ISS 4

G PHOTON Range

General product information

PHOTON is the latest generation of gas fired unit heaters, CE and UKCA certified to EN17082 for use in non domestic installations.
All models and sizes are available for use with natural gas (G20, G25 or G25.3). The type of gas, the input rate and the electrical supply requirement is shown on the heater rating plate. Check the rating plate to determine if the heater is appropriate for the intended installation.
This installation manual is shipped with the unit. Verify that the literature is correct for the model being installed. If the manual is incorrect for the heater, contact the supplier before beginning installation.
The instructions in this manual apply only to the models listed.
Installation should be carried out by a suitably qualified installer in accordance with these instructions and the current rules and regulations in force. The installer is responsible for the safe installation of the heater.

Warranty
This equipment comes as standard with a manufacturers two year warranty (2 years parts, 1 year labour) unless agreed otherwise at the time of order. The warranty is void if:
1. The installation is not in accordance with these instructions.
2. Wiring is not in accordance with the diagram furnished with the heater.
3. The unit is installed without proper clearances wherever clearances are required regardless of the material being combustible.
4. The unit is installed without proper ventilation and air for combustion.
5. The equipment is used in atmospheres containing flammable vapours or chlorinated or halogenated hydrocarbons or any contaminant (silicon, aluminium oxide, etc.).
6. The unit has not been serviced and maintained in accordance with the information contained within these instructions.

Using this manual
The symbols for Caution’ andWarning’ are used to highlight certain points throughout this manual.
Caution is used when failure to follow or implement the instruction(s) can lead to premature failure or damage to the heater or its component parts.
Warning is used when failure to heed or implement the instruction(s) can lead to not only component damage, but also to a hazardous situation being created where there is a risk of personal injury.

7. An appliance is connected to a duct system or the air delivery system is modified in any way.
Ignoring the warning and caution notices and the advice from the manufacturer on installation, commissioning, servicing or use, will jeopardise any applicable warranty. This could also compromise the safe and efficient running of the appliance itself and thereby constitute a hazard.
The electrical isolator should only be used for maintenance purposes or in an emergency. It should not be used for closing down the main burner as it switches off the fan prematurely and may damage the heat exchanger, invalidating the warranty.

Page No 4 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Important notice to installers
Before installation, carefully read these instructions and follow the processes explained by the manufacturer. These instructions are only valid for appliances designed to operate in Europe. If the country code and gas category on the appliance data label does not match the country of installation or the country codes and gas categories as shown in this instruction manual, it will be necessary to contact the distributor or manufacturer to provide the necessary information for the modification of the appliance to the conditions of use for the country of installation.
Installing, commissioning, testing, programming and maintenance of these products must only be carried out by suitably qualified and trained technicians and in full compliance with all applicable regulations and current best practices.
Check if the appliance as described on the packaging label is in accordance with the correct type and model as specified on the data plate and complies with your customer order.
Check that the temperature ranges given and those of the location match. The appliance must be powered with a voltage corresponding to the value shown on the rating plate.
These units must be installed in accordance with the rules in force and local regulations / legislation as appropriate plus all local building codes. Installers should satisfy themselves that the gas pipework installation is carried out in accordance with all current legislation, Codes of Practice and recommendations.
Additionally it may be necessary to protect the gas valves which form part of the heater or burner assembly from potential pipe contamination particularly, but not exclusively, where copper gas pipework is used.

In instances where copper pipework is to

be used for all or part of a gas pipework

G

installation, including short length final

connections then we advise that installers

consult with the gas supplier or provider and

satisfy themselves what additional precautions

may be necessary.

Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment.

Gas-fired appliances are not designed for use in hazardous atmospheres containing flammable vapours or combustible dust, in atmospheres containing chlorinated or halogenated hydrocarbons or in applications with airborne silicone substances.
Any reference made to Laws, Standards, Directives, Codes of Practice or other recommendations governing the application and installation of heating appliances and which may be referred to in Brochures, Specifications, Quotations, and Installation, Operation and Maintenance manuals is done so for information and guidance purposes only and should only be considered valid at the time of the publication.
The manufacturer cannot be held responsible from any matters arising from the revision to or introduction of new Laws, Standards, Directives, Codes of Practice or other recommendations.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 5 of 52

G Health and safety
Ensure that anchoring points are suitable for the weight and loading of the product and if required, add suitable reinforcement to the anchoring points area.
Due consideration should be taken for workplace safety, risk assessments and waste disposal.
Any modification of the product may be hazardous and the manufacturer is not liable for any damage or injury caused by improper use.
Do not use this appliance if any part has been immersed in water. Immediately call a qualified service technician to inspect the appliance and replace any gas control that has been immersed in water.
This appliance is not intended for use by persons (including children) with reduced sensory or mental capabilities or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
Should overheating occur or the gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off the electrical supply.
Gas-fired appliances are not designed for use in hazardous atmospheres containing flammable vapours or combustible dust, in atmospheres containing chlorinated or halogenated hydrocarbons or in applications with airborne silicone substances.
This manual should be kept in a safe place for future reference.

For your safety, if you smell gas:
· Do not try to light any appliance
· Do not touch any electrical switch, do not use any phone in your building
· Evacuate all personnel · Contact your gas supplier
immediately
Do not store or use petrol or other flammable vapours and liquids in the vicinity of the appliance.
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.
Read the installation, operation and maintenance instructions thoroughly before installing or servicing this equipment.
Installation, assembly, commissioning, service and maintenance procedures must be carried out only by suitably competent qualified persons.
Unauthorised modifications to the appliance, or departure from the manufacturer’s guidance on intended use, or installation contrary to the manufacturer’s recommendations may constitute a hazard.
Use only factory authorised parts and spares when replacement is required.
In case of persistent problems, contact your distributor.

Page No 6 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Uncrating / preparation

G

Prior to crating and shipping, this unit was test

operated and inspected at the factory and left in

full operating condition. If the unit has incurred

damage in shipment, document the damage

with the transport company and contact your

supplier.

After unpacking the appliance leave it fastened to the wooden blocks / pallet until just before siting to prevent damage to the unit.

Read this booklet and become familiar with the installation requirements of your unit.

Check if the local distribution conditions of electricity supply, type of gas and pressure of the appliance are compatible with the data plate.

The appliance must be installed in accordance with the current rules in force and any local or national regulations.

The requirements of the “Local Building Standards office”, the premises “Insurance” undertaking and the “Fire Office” must also be observed.

Before commencing installation, ensure all necessary supplies, tools and manpower are available.

If the installation includes options such as downturn nozzles etc., install these options before the heater is suspended. Follow the instructions included in the option package.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 7 of 52

Technical Data

TD

Model Combustion Air and Flue Type 1 Heat Input High Fire (HS) 2 Heat Input Low Fire (HS) 2 Heat Input High Fire (HI) 3 Heat Input Low Fire (HI) 3 Heat Output High Fire Heat Output Low Fire Gas Consumption High Fire (HS) G20 4 Gas Consumption Low Fire (HS) G20 4 Gas Consumption High Fire (HS) G25 4 Gas Consumption Low Fire (HS) G25 4 Gas Consumption High Fire (HS) G25.3 4 Gas Consumption Low Fire (HS) G25.3 4 Thermal Efficiency High Fire G20 (NCV) Thermal Efficiency High Fire G25 (NCV) Thermal Efficiency High Fire G25.3 (NCV) Gas Connection 5 Flue and Combustion Air Connection Collars (Indoor) Maximum Flue Length Airflow
Motor Speed
Temperature Rise at Maximum Airflow Horizontal Throw Noise Level 6 Minimum mounting height 7 Total Electrical Rating Electrical Connection Protection Grade Net weight

PHOTON 10

20

kW 11.28 kW 5.64 kW 10.16 kW 5.08 kW 9.34 kW 4.90 m3/h 1.07 m3/h 0.54 m3/h 1.25 m3/h 0.62 m3/h 1.22 m3/h 0.61 % 91.9 % 91.0 % 90.6 BSP

22.50 10.85 20.27 9.77 18.39 9.39 2.14 1.03 2.49 1.20 2.44 1.18 90.7 91.0 90.7
½”

Ø mm

80

m m3/h 1223 rpm 1443
K 23 m 10 dBA 46 m W 145

2533 1436
22 16 48
150

IP

Kg 43

63

25
32.40 17.82 29.19 16.05 26.54 15.37 3.08 1.70 3.59 1.97 3.51 1.93 90.9 90.5 90.7

35

45

55

65

B23 / B53 / C13 / C33

38.80 51.60 64.80 77.40

19.20 26.83 29.16 42.57

34.95 46.49 58.38 69.73

17.30 24.17 26.27 38.35

31.68 42.24 53.46 63.59

16.65 23.18 25.18 36.74

3.69 4.91 6.17 7.37

1.83 2.56 2.78 4.05

4.30 5.71 7.17 8.57

2.13 2.97 3.23 4.71

4.20 5.59 7.02 8.39

2.08 2.91 3.16 4.61

90.6 90.9 91.6 91.2

90.7 90.8 91.5 91.0

90.5 90.8 91.4 91.1

¾”

100

3035 934 26 26 49
256
84

4120

9.0 4562 5877

1328 1320 925

23

28

27

27

26

32

51

51

51

2.5

550 550 690

230V / 1N / 50Hz

IP20

89

99

121

7125 1335
27 32 56
820
122

70

100 120

86.00 119.00 144.00 47.30 59.50 73.80 77.48 107.21 129.73 42.61 53.60 66.49 71.25 97.87 120.16 40.84 51.52 64.21 8.19 11.33 13.71 4.50 5.67 7.03 9.52 13.18 15.94 5.24 6.59 8.17 9.32 12.89 15.60 5.13 6.45 8.00 92.0 91.3 92.6 92.1 90.8 92.1 91.8 90.9 91.8
1″
130

8681 1384
24 36 59

10350 17552

1332 1206

28

20

36

36

60

62

1000 1040 1900

135 168 258

1. Gas appliance classifications for approved venting methods are based on EN 1749:2020 2. Refers to gross calorific value of fuel 3. Refers to net calorific value of fuel 4. Natural gas: G20 Hs 37.78 MJ/m³, G25 Hs 32.49 MJ/m³, G25.3 Hs 33.2 MJ/m³ @ 15°C and 1013.25 mbar 5. There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate diameter of the supply
line to minimize the pressure drop through the gas pipes. If necessary, reduce the diameter of the supply line at the inlet of the unit 6. Sound pressure measured in dB(A) calculated to 5m free field 7. Minimum height from floor to bottom surface of heater for safe use of heater. Positioning of unit heaters for proper performance is application
dependent. Operation is affected by other air moving equipment in the space, obstructions to the airflow, draughts and/or close proximity to doors or windows, etc. Care should be taken to avoid mounting the heaters higher than these recommendations, unless downturn nozzle options are used, as significant stratification may occur resulting in poor floor coverage and higher energy losses through the roof structure. Isothermal conditions +/20°C ambient air temperature, discharge louvres zero deflection, v = 0.5m/s. The air throw will be influenced by the height of the building, mounting height of the unit, ambient temperature & adjustment of the louvres.

Page No 8 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Dimension Diagrams
A B
Front View Photon 10-100 A
K L Plan View Photon 10-120
C

A B
Front View Photon 120 C

TD

Side View Photon 10-70 C

Side View Photon 100

Side View Photon 120

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 9 of 52

TD

F H
JG E D Rear View Photon 10-70
F H
J G E D Rear View Photon 100 F H

J G
E

D Rear View Photon 120

Page No 10 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Dimension Tables

Unit Dimensions

Dimensions Model Unit Width A Unit Height B Overall Length C Side to Gas Connection Centre D Bottom to Gas Connection Centre E Side to Flue Connection Centre F Bottom to Flue Connection Centre G Side to Air Inlet Centre H Bottom to Air Inlet Centre J Top Suspension Centres K Top Suspension Centres L

PHOTON 10 mm 700 mm 380 mm 810 mm 73 mm 198 mm 185 mm 186 mm 109 mm 291 mm 350 mm 413

TD

20

25

35

45

55

65

70

100 120

700 970 970 970 970 970 970 1010 1010

660 520 520 520 733 733 800 1080 1360

840 1160 1180 1180 1160 1190 1160 1140 1160

96

180 174 179 158 154 154 163 101

257 124 134 134 215 215 224 236 213

185 204 204 204 204 204 204 244 244 326 260 260 260 367 367 400 540 680 109 141 141 141 141 141 141 197 177

431 385 385 385 492 583 616 760 895

350 600 600 600 600 600 600 600 600

413 623 623 623 623 623 623 623 623

Combustion air, flue and gas connections

Connection Sizes

Model

PHOTON

10

20

25

35

45

55

65

70

100 120

Gas connection diameter

BSP

½”

¾”

1″

Combustion air inlet diameter

mm

80

100

130

Flue diameter

mm

80

100

130

Maximum Flue Length

m

9.0

Clearance distances

Clearance Distances Model Top clearance Rear clearance Bottom clearance * Side clearance Service panel clearance

PHOTON

10

20

25

35

45

55

65

70

100 120

mm 50

50

50

100 100 100 100 100 100 100

mm 450 450 450 450 450 450 450 450 450 450

mm 50

50

50

100 100 100 100 100 100 100

mm 50

50

50

100 100 100 100 100 100 100

mm 850 850 850 850 850 850 850 850 850 850

• Heaters can be base mounted on suitable non combustible supports.

A minimum 150mm clearance distance MUST be maintained at all points around the entire flue system.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 11 of 52

Installation

Heater location

Flue requirements may affect

the location of the heater. Refer

to the “Combustion air supply /

I

flue arrangement” section before

making a final determination.

the unit so that it will discharge directly toward the source of cold air, typically from a distance of 4.5 to 6.0 metres. Alternatively, air curtains can be installed. Contact the manufacturer / distributor for more details.
Hanging the heater

The flue pipe and accessible heater surfaces will be hot under normal operation and will cause burns if touched. Suspend the heater such that these components cannot be touched.
For best results, the heater should be placed with certain rules in mind:
· Always ensure that the minimum clearances detailed previously are maintained.
· When possible, heaters should be arranged to blow toward or along exposed wall surfaces.
· Suspended heaters are most effective when located as close to the working zone as possible, but care should be exercised to avoid directing the discharged air directly on to room occupants.
· Partitions, columns, counters or other obstructions should be taken into consideration when locating the unit heater so that a minimum quantity of airflow will be deflected by such obstacles.
· When unit heaters are located in the centre of the space to be heated, the air should be discharged toward the exposed walls.
· In large areas, unit heaters should be located to discharge air along exposed walls with extra units provided to discharge air in toward the centre of the area. For optimum results heaters are best used in conjunction with recirculating air fans suspended at high level. Contact the manufacturer / distributor for more details.

Do not locate the heater where it may be exposed to water or where the ambient temperature exceeds 40°C.
Ensure that the structural elements, which will be used to suspend or support the appliance, are adequate to carry the weight of the appliance and its ancillary components i.e. the flue system. Unit weights are given in the technical data section previously.
Sufficient space must be provided around the heater for servicing and clearances for safety.
Ensure that the unit heater is installed in a level plane.
Always provide a minimum clearance of 600mm at an open air intake (inlet side)
Suspend the heater only from the threaded nut retainers or with a suspension kit provided by the manufacturer.
Do not suspend the heater from the heater cabinet panels.
Do not add additional weight to the suspended heater.
The minimum safe mounting height is 2.5 metres.

· At those points where infiltration of cold air is excessive, such as at entrance doors and shipping doors, it is desirable to locate

Page No 12 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

The unit heater is delivered on a pallet; leave the unit on the pallet until you are ready to hang it. If the bottom of the unit is not protected or supported prior to installation, damage can occur. The heater is supplied with four point suspension. All points must be used. Two threaded nut retainers are provided on each side of the top of the heater. See Figure 1 for hanger rod size. Be sure that the threaded hanger rods are locked to the heater as illustrated in Figure 1. Recommended maximum hanger rod length is 1.8m. Where longer drops are required, ensure that restraints are fitted to prevent excess lateral movement and supports are adequately sized. A wall mounting bracket kit is available to offer mounting alternatives. Please contact the manufacturer / distributor for details.
Add a nut to lock the M10x1.5 hanger rod to the heater
Figure 1 Suspending the heater with rods from the threaded nut retainers

Combustion air supply / flue arrangement
Photon unit heaters may be installed as a Type C room sealed heater requiring both a combustion air inlet pipe and a flue pipe (Type C13, C33 only) or as a Type B forced draught
heater where the combustion air is taken from I
the room space the heater is installed in and which requires only a flue pipe exhausting to outdoors (Type B23 or B53 only). All products of combustion must be flued to outdoor atmosphere.
The unit heaters are designed to operate safely and efficiently with either a horizontal or vertical flue system when installed according to the specific requirements and instructions.
If the heater is replacing an existing heater, be sure that the flue is of the correct size and that the existing flue is in good condition. A correctly sized flue system is required for safe operation of the heater.
For testing, the flue pipe should include a sealable test point. Ideally the test point should be at least 450mm away from the air heater flue connection socket. However if a concentric flue is attached directly to the connection sockets then the combustion should be tested through the flue outlet collar via a drilled test point which must be securely plugged on completion.
Follow the flue pipe manufacturer’s installation instructions for making joints, including connections to the air heater, for passing through a building element and for support requirements.
Gasket sealed single wall seamless aluminium or stainless steel flue pipes are required. All joints must be sealed to prevent the products of combustion from leaking into the building.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 13 of 52

The products of combustion from Type B appliances

the unit heater must be flued to the outside of the building.

If the unit heater is to be installed as a Type B appliance, air for combustion will be taken from

A properly sized flue system is

within the space where the heater is installed.

I

required for safe operation of the unit heater.

Single wall seamless aluminium or stainless steel flue pipes are required. All joints must be

An improperly sized flue system

sealed to prevent the products of combustion

can cause unsafe conditions and/or from leaking into the building. If the flue passes

create condensation.

through a combustible element of the building it

must be enclosed in a sleeve of non-combustible

Failure to provide proper flueing

material and separated from the sleeve by a

arrangements could result in death, minimum of 25 mm air break. The temperature

serious injury and/or damage to

of any combustible material near to the flue

property.

must not exceed 65°C when the heater is in

It is important to ensure that there is an adequate air supply at all

operation. The flue must be at least 150 mm away from any combustible material.

times for both combustion and

Single wall flue pipe exposed to cold air or run

heating requirements. Modern

through unheated areas should be insulated.

buildings involve greater use

Where condensation is unavoidable, provision

of insulation, improved vapour

must be made for the condensation to flow

barriers and weather proofing.

freely to a point to which it can be released,

These practices mean that buildings i.e. a drain or gully. The condensation drain

are sealed much tighter than in the from the flue must be constructed from non-

past.

corrodible material not less than 20 mm

Proper combustion air supply for a power vented Type B installation

diameter. Copper or copper based alloys must not be used for condensation drains.

requires ventilation of the heated Vertical flue runs greater than 3m long will

space. Natural infiltration of air

require a condensate drain fitting between the

may not be adequate. Use of

flue outlet of the heater and the vertical flue

exhaust fans aggravates this

pipe. Alternatively, insulated flue pipe should be

situation. It is important to ensure considered.

that there is adequate combustion air supply at all times. Reliance on doors and windows is not permitted.

Horizontal flue runs should be installed with a slight gradient of approximately 5° towards the terminal. Due consideration should be given to the possibility of condensation from the flue

Always ensure that an adequate

freezing on any footpaths that pass below the

inlet for fresh air for combustion

terminal.

is provided sized to suit the total installation of any combustion apparatus.

It is important to ensure that there is an adequate air supply at all times for both combustion and heating requirements.

The flue MUST be installed in accordance with national and local regulations.

Ensure that the air combustion inlet opening at the rear side of the unit cannot be obstructed.

Page No 14 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

When these units are installed in Type B applications, air for combustion is taken from the space in which it is installed. Do not restrict the combustion air intake. Ensure that an adequate clean air supply for combustion and ventilation is provided within the building in accordance with the relevant rules and regulations in force. Roof B23 / B53
Wall B23 / B53
Figure 2 Approved appliances Type B
1 2
3
1. Combustion air inlet collar with grille
2. Flue pipe outlet collar 3. Gas connection Figure 3 Connections on rear of unit

Type C appliances
Unit heaters used in a balanced flue application are designed to be fitted with a combustion air inlet duct that obtains outdoor air and a flue pipe that exhausts flue products to outdoors.
I
Single wall seamless aluminium or stainless steel flue pipes are required. All joints must be sealed to prevent the products of combustion from leaking into the building. If the flue passes through a combustible element of the building it must be enclosed by a sleeve of non-combustible material and separated from the sleeve by a minimum of 25 mm air break. The temperature of any combustible material near to the flue must not exceed 65°C when the heater is in operation. The flue must be at least 150 mm away from any combustible material.
Single wall flue pipe exposed to cold air or run through unheated areas should be insulated. Where condensation is unavoidable, provision must be made for the condensation to flow freely to a point to which it can be released, i.e. a drain or gully. The condensation drain from the flue must be constructed from non-corrodible material not less than 20 mm diameter. Copper or copper based alloys must not be used for condensation drains.
Vertical flue runs greater than 3m long will require a condensate drain fitting between the flue outlet of the heater and the vertical flue pipe. Alternatively, insulated flue pipe should be considered.
Horizontal flue runs should be installed with a slight gradient of approximately 5° towards the terminal. Due consideration should be given to the possibility of condensation from the flue freezing on any footpaths that pass below the terminal.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 15 of 52

C13 Wall
I

C33 Roof

Figure 4 Approved appliances Type C

Photon Model

10

20

25

35

45

55

65

70 100 120

Heater socket and flue diameter

mm

80

100

130

Maximum straight length two pipes (combustion air

inlet and flue outlet pipe) with wall or roof terminal m

9.0

(Type C appliance

Maximum straight length single pipe (flue outlet pipe) with wall or roof terminal

m

9.0

Equivalent length of 45° elbow

m

0.75

Equivalent length of 90° elbow

m

1.5

Minimum flue length

m

1.0

Table 1 Flue Diameter and Flue Pipe Lengths

Photon Model Flue Gas Temperature High Fire T Flue Gas Temperature Low Fire T Mass Flow Rate Flue Gases High Fire G20 Mass Flow Rate Flue Gases High Fire G25 Mass Flow Rate Flue Gases High Fire G25.3 Flue Pressure at Maximum Flue Resistance
Table 2 Flue Gas Properties

°C °C kg/h kg/h kg/h Pa

10 161.1 65.0 7.92 9.12 9.61
3

20 179.9 71.1 17.48 15.45 15.38
6

25 176.3 78.7 24.96 25.47 24.84
70

35 182.6 68.2 29.52 29.01 28.29
10

45 176.9 74.7 40.08 39.73 30.73
19

55 163.9 72.8 49.51 55.64 52.83
18

65 170.5 76.9 60.12 55.72 57.64
11

70

100 120

152.8 171.1 146.8

75.8 72.1 61.0

72.41 86.84 98.97

62.18 97.41 126.10

64.86 101.38 112.72

14

23

6

Page No 16 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Gas connection

Ensure that a gas supply line includes a filter and

A competent and/or qualified engineer is required to either install a new gas meter to the service pipe or to check that the existing meter

has been tested and purged in accordance with prescribed practice prior to commissioning and taking the air heater into service.

is adequate to deal with the rate of gas supply This appliance is equipped for a maximum gas

required. Installation pipes should be fitted in

supply pressure of 50mbar.

accordance with national standards so that the

I

supply pressure, as stated in the technical data

Never use a flame to test for gas

section will be achieved.

soundness.

It is the responsibility of the competent engineer to ensure that other relevant standards and codes of practice are complied with in the country of installation. Pipes of smaller size than the heater inlet gas connection must not be used. The complete installation must be tested for soundness as described in the country of installation. Support gas piping with pipe hangers, metal strapping, or other suitable material.
Do not rely on the unit to support the gas pipework installation.

PHOTON unit heaters are designed to operate on natural gas (G20, G25 or G25.3). Check that the gas supply, gas category and gas inlet pressure is in accordance with the information given on the unit data plate. To let the unit function at maximal heat output, the gas supply pipe MUST be correctly sized. Close to the air heater a gas tap with coupling must be mounted for servicing (see figure 4).
The unit is equipped with a nipple that extends outside the cabinet. The gas connection is ½-, ¾-, or 1-inch, depending on the size of the unit.

Before installation, check that the local distribution conditions, nature of gas and pressure, and adjustment of the appliance are compatible.

The whole of the gas service installation including the meter must be inspected, tested for soundness and purged in accordance with appropriate requirements by a qualified person.

This appliance is designed for a maximum gas supply pressure of 50mbar. When pressure testing the supply piping with test pressures above 50mbar, disconnect the heater and manual valve from the gas supply line that is to be tested. Cap or plug the supply line.
All sealing products must be resistant to the action of liquefied petroleum gas or any other chemical constituents of the gas being supplied.
Install a ground joint union and manual shut-off gas cock upstream of the unit control system.
The unit is equipped with a nipple that extends outside the cabinet.
Check that the gas category is in accordance with the data described on the air heater.

Open Closed Figure 4 Gas Connection Details

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 17 of 52

Country

Gas Category

AT, BG, CH, CY, CZ, DK, EE,

I2H

ES, FI, GB, GR, HR, IE, IT, LT,

LV, NO, PT, RO, SE, SI, SK, TR

Gas Type Natural Gas (G20)

Nominal Supply Pressure (mbar)
20

I LU, PL, RO

I2E

BE

I2E(R)B

FR

I2Esi

DE

I2ELL

NL

I2EK

Table 3 Gas Supply Details

Natural Gas (G20) Natural Gas (G20 / G25) Natural Gas (G20 / G25) Natural Gas (G20 / G25) Natural Gas (G20 / G25.3)

20 20 / 25 20 / 25 20 / 20 20 / 25

Maximum Supply Pressure (mbar)
25

Minimum Supply Pressure (mbar)
17

25 25 / 30 25 / 30 25 / 30 25 / 30

17 17 / 20 17 / 20 17 / 18 17 / 20

Electrical supply and connections
The electrical installation may only be carried out by an appropriately qualified person in accordance with the current Rules and Regulations in force.
This appliance must be earthed.
Check that the electrical specification is in accordance with the specified data on the air heater. All electrical connections must be made in the heater control compartment (refer to Figures 6 and 7). Connections must be in accordance with the terminal markings and the wiring diagram affixed to the unit.
The maximum cable inlet size is 6mm2.
The minimum external control required for the unit is a room thermostat capable of providing a 0-10V DC signal to the burner. It is essential that the main input line and neutral to terminals L and N remain live at all times even when the unit is switched off to ensure correct operation of the unit and to let the fan operate independent of the heating control. Never incorporate controls that isolate the appliance electrically.
The supply line to the heater should include a mains switch / isolator adjacent to the appliance.

Check that the air heater is well earthed and that an earth leakage test is carried out.
An external green indicator light is fitted on the heater section to signify when the burner is ON.
An external burner reset switch with red indicator light is fitted on the unit. To add a remote reset button, make connections to the terminals in the heater as indicated on the wiring diagram.
If the reset button requires activating for any reason, the cause must be determined. After determining and correcting the problem, restart the heater and monitor for a period long enough to ensure proper operation (approximately 5 minutes).
Ensure that all cables and installers wiring are appropriately fixed and that they do not touch the flue or combustion collector box.
To ensure that the unit is airtight, all unused cable couplings must be hermetically sealed.
Permanent damage can occur to the ignition controller when faulty/incorrect connections to the thermostat, reset switch or burner failure lamp are made!

The minimum clearance distance between the contacts must be more than 3 mm.

Switching of wires for reset switch and flame failure will destroy the ignition controller.

Page No 18 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Thermostat controls
Ancillary controls are required to provide timed heat cycles, room comfort temperature level, frost protection, override air circulation etc. These are not included with the appliance and should be ordered separately.
I
Do not attempt to control more than one unit heater from a single thermostat or control panel unless a properly wired relay is fitted. Follow the instructions supplied with such panels. The location of the room thermostat or sensor is very important. It should not be positioned on a cold wall or cold surface. Avoid location in draughty areas or where it may be influenced by heat sources e.g. the sun, process plant, etc. The thermostat should be mounted on a vibration free surface and mounted about 1.5 metres above floor level. Follow the thermostat manufacturers instructions. The thermostat must be suitable for potential free contacts.
Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 19 of 52

Figure 5 Wiring Connections
Page No 20 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Legend:
Heater Terminals
Controls Terminals
Notes:
1. Link wires MUST be fitted where shown solid.
2. Terminals shown may not be in numerical order. Unused terminals may not be shown at all.
3. 1-Phase supply cable 2.5mm² minimum. 4. Controls cables 0.75mm² for up to
200 metre run. 5. SmartCom sensor & remote ‘on’ use
6A screened mains cable up to 100 metre run. 6. SmartCom master-slave network communication by screened twisted pair cable. (e.g. Belden 9841) Connect screen to terminal C0. 7. Fuse rating must be sufficiently sized to handle heater & motor loadings.

1-Phase Permanent Mains Supply

L

1-Phase

N

230v 50Hz

Mains IsolatorMust be installed within 1 metre of the appliance

IMPORTANT Please remove ‘plug-in’ jumper
NEUTRAL
LIVE

SmartCom3

Controls

LN

4 OT OT C 9 10 64 66

B1 B0

B2

D0

D1

S/ R0

S/ R1

C0

C1 C2

1L

2N

41

40

C 9 10 64 66

‘ON’ ‘OFF’
B.M.S. or Remote Switching

C1 C2
Master/Slave Connections

Optional Optional Room Duct Sensor Air Sensor

SmartCom MultiZone Controller

900717 – Photon Control Interconnections EN

Remote Enable (0-10VDC) Lockout Lamp (240v) Lockout Reset
Fan Only Function

Power Supply
Other Controls
L 4 OT OT C 9 10 N 64 66
0-10V

Wiring Connections I

Commissioning and operation

PHOTON unit heaters must be commissioned before putting into service.

unit. The applicable requirements are in the location and installation section of this manual.

On firing of a new unit the tubes

· Check vent system to be sure that it is

will glow red. This will diminish over

installed according to the combustion air

time as the bright new tubes begin to

supply instructions given in the installation

oxidise and darken. It may take some

section of this manual.

time to fully oxidise the tubes; this

· Press LC3 thermostat reset button to ensure C

being dependent on the frequency /

it is not in lockout.

amount the unit is fired.

Pre-start checks
Prior to starting up the unit, carry out the following checks:-
· Do not use this appliance if any part has been subjected to water ingress. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control.

Start up
For your safety, follow the instructions exactly otherwise damage or injury could occur!
During start up all gas services (up to the gas meter) must be checked again for gas soundness to ensure no leaks are present.

· Check unit suspension. The unit must be secure.
· Verify that no other parts are fitted which are not individually supported and secured.
· Check gas pipework for leaks and correct gas line pressure.
· Purge gas lines of trapped air.

1. Turn on the gas supply and check for gas leaks. Ensure that all pressure test points are closed and gas tight.
2. Switch on the electrical supply.
3. Set the room thermostat to call for heat at high fire (10V).

· Check electrical wiring and ensure that wiring conforms to the wiring diagram. Be sure that all cables are correctly sized to meet the requirements of the units.

4. If the red light next to the lockout reset switch is illuminated, press and hold it for 3 seconds, then release. If the light does not go off see Fault Finding section.

· Verify that the appliance is earthed by conducting an earth continuity test.

5. From initial power up there can be a delay of up to 2 minutes before the heater will

· Ensure that fuses are of the correct rating

respond to a heat demand. During this

and fuse value.

time, the ignition controller performs a self

· Check polarity. Verify that line voltage exists

diagnostic routine.

between the live terminal L1 and earth ground.

6. The combustion fan will now run and the burner will automatically light after about

· Check ignition controller program key

35 seconds. The air circulation fan will run

matches the resistance value as shown in

within 30 seconds.

Combustion data table for the heater model.

· Ensure that the air discharge louvres are open.

7. If the installation is new, 3 start-up cycles may be necessary due to air still being present in the gas pipe. Should the air heater

· Check that no combustibles are near to the

still not light, refer to Fault Finding section.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 21 of 52

8. The gas pressure must correspond to the data in table 3. If the gas pressure is higher than 50mbar, a pressure regulator must be installed. If the gas pressure is lower than the minimum as shown on the data plate, check the supply pipework to ensure it is correctly sized. Gas pressure should be checked with the appliance running at maximum heat load.
C When overheating occurs, shut the manual gas
tap before turning off the electric power.

Air / gas ratio controls
PHOTON appliances are fitted with air-gas ratio control devices with two adjustments – throttle and offset.
Throttle is adjusted at high fire.
Offset is adjusted at low fire.

1 – Offset adjustment 2 – Inlet pressure measuring point 3 – CO2 adjustment point (throttle) 4 – Offset pressure measuring point
Figure 6 Gas valve adjustment models 10-70

Gas valve adjustment
All units are set before leaving the factory. Any modification must be carried out by a suitably qualified technician.
Models 10-70
To adjust the throttle use a 4mm hex key on the screw located on the venturi. Rotate counter clockwise to increase %CO2. Rotate clockwise to decrease %CO2.
To adjust the offset, use a T40 Torx key to remove the protection cap on the gas valve. Rotate counter clockwise to decrease pressure / %CO2 and rotate clockwise to increase pressure / %CO2. Refit cap after adjustment.

Model 100
To adjust the throttle use a 4mm hex key on the screw located on the venturi. Rotate clockwise to increase %CO2. Rotate counter clockwise to decrease %CO2.
To adjust the offset, use a T40 torx key to remove the protection cap on the gas valve. Rotate counter clockwise to decrease pressure / %CO2 and rotate clockwise to increase pressure / %CO2. Refit cap after adjustment.
2
1

3

4

1 – Offset adjustment 2 – Inlet pressure measuring point 3 – CO2 adjustment point (throttle) 4 – Offset pressure measuring point

Figure 7 Gas valve adjustment model 100

Page No 22 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Model 120
To adjust the throttle use a flat blade screwdriver to remove the large round cover on top of the gas valve. Using a 3mm hex key on the screw located on the venturi, rotate counter clockwise to increase %CO2. Rotate clockwise to decrease %CO2.

Upon completion of conversion recommission the heater. Refer to the commissioning section for more details.
Commissioning checks
Commissioning requires the use of a CO/CO2 flue gas analyser with an inaccuracy < 0.1% and two pressure gauges.

To adjust the offset, use a T40 torx key to remove the protection cap on the gas valve. Rotate counter clockwise to decrease pressure /

For measuring gas pressure a resolution of 0.1 mbar or better is recommended.

C

%CO2 and rotate clockwise to increase pressure / %CO2. Refit cap after adjustment. There is no pressure outlet measurement point on this gas valve.

For measuring offset pressure a low range gauge with a resolution of 1 Pa or better is required.

Read section on air-gas ratio control

1

adjustment before proceeding.

2 During commissioning the appliance %CO2, CO

3

ppm and flue gas temperature values should be

compared to those shown in the Combustion

Data Table.

1. Slacken screw in gas valve inlet pressure test point and attach gas pressure gauge.

1 – Offset adjustment 2 – Inlet pressure measuring point 3 – CO2 adjustment point (throttle)
Figure 8 Gas valve adjustment model 120
Gas conversion
PHOTON unit heaters are designed to operate on natural gas types G20, G25 and G25.3.To modify for use on an alternative listed gas type, follow the commissioning guide and refer to the Combustion Data table for approximate throttle turns from G20 setup.
The data label needs to be updated after conversion. Using permanent ink place an ‘X’ in the box above the relevant gas type column to indicate the new gas setting. Obscure any previous indication.

2. Start the appliance following the start up procedure.
3. Ensure the thermostat is set to call for maximum heat (10V). For optimal appliance control during commissioning the 0-10VDC thermostat inputs can be substituted with a manually adjustable 0-10VDC generator wired into the burner terminals 66 & 64 (see wiring diagram).
4. Check gas supply pressure against the values on the data plate. If gas supply pressure is too low, shut-down the unit and correct.
5. Put CO/CO2 analyser probe into flue. Observe the CO/CO2 readings and adjust throttle screw until nominal high fire %CO2 value is achieved +/- 0.1%CO2 (see Combustion Data for details). If the venturi has been replaced it can be approximately set by fully closing and then adjusting the throttle a set number of turns as indicated in the combustion data table.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 23 of 52

If the chamber insulation has been replaced the organic binders will burn off during the first few minutes of operation. This will result in a temporary increase in CO and CO2 readings. 6. Keep appliance running at full rate until
completely stabilised and recheck %CO2. If necessary make further adjustments to throttle before proceeding.
C
7. For models 10-100, slacken screw in gas valve outlet pressure test point and attach low range pressure gauge. Note, offset is a vacuum reading.
Outlet test point
Inlet test point
Gas pressure test points Photon 10-70
Inlet test point
Outlet test point
Gas pressure test points for Photon 100
Inlet test point
Note: there is not an outlet test point on the Photon 120
Gas pressure test point for Photon 120

To set low fire adjust thermostat to call for minimum heat (1V):-
· Adjust offset screw to obtain nominal offset pressure +/- 5 Pa for models 10-100. (see Combustion Data for details). Note that there is no outlet pressure test port on the model 120 gas valve.
· Observe the CO/CO2 readings and adjust offset screw if needed to obtain nominal low fire %CO2 (+/-0.1%CO2).
· Return heater to high fire (10V) and recheck high fire %CO2 value. If necessary make any final adjustments to the throttle.
· Disconnect pressure gauges and tighten screws in gas valve test points.
· Remove heat demand and allow heater to shut-down.
· Reconnect thermostat connections if bypassed for commissioning.
Commissioning – hand over
Upon full and satisfactory completion of commissioning, a record of commissioning information should be left with the person responsible for the heater. The commissioning engineer must ensure that the user is familiar with the safe and efficient use of the heater, detailing the function of all controls and main components.
The user should be made aware of the following in particular: –
(i) Lighting, shutdown, and operational information.
(ii) Safety features, data plate, and labelling.
(iii) The requirement for regular inspection – especially if the heater is within a more demanding environment – and the need for regular servicing carried out by a suitably qualified person.

Page No 24 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Model

Photon 10

20

25

35

45

55

65

70

100 120

CO2 at High Fire (Throttle) G20

%

8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70

CO G20

ppm

< 50 ppm

Throttle Turns from Closed

–

3.0 out 1.5 out 4.5 out 7.0 out 6.0 out 8.5 out 7.5 out 8.0 out 29.5 in 1.0 out

CO2 at Low Fire (Offset) G20

%

7.70 8.10 8.10 8.10 8.10 7.90 8.10 8.20 8.20 8.00

CO G20

ppm

< 50 ppm

Low Fire Offset Pressure G20

Pa

-22

-45

-25

-54

-27

-77

-87 -105 -67

N/A

CO2 at High Fire (Throttle) G25

%

8.60 8.70 8.70 8.70 8.70 8.60 8.70 8.70 8.60 8.60

CO G25

ppm

< 50 ppm

Throttle Turns from G20

–

2.0 out 1.5 out 1.75 out 2.5 out

2.125 out

3.0 out 2.5 out 3.0 out

7.5 in

0.5 out

C

CO2 at Low Fire (Offset) G25

%

7.70 8.10 8.10 8.10 8.10 7.90 8.10 8.20 8.20 8.00

CO G25

ppm

< 50 ppm

Low Fire Offset Pressure G25

Pa

-32

-55

-24

-34

-26

-72 -105 -134 -66

N/A

CO2 at High Fire (Throttle) G25.3

%

8.60 8.70 8.70 8.70 8.70 8.60 8.70 8.70 8.60 8.60

CO G25.3

ppm

< 50 ppm

Throttle Turns from G20

–

1.0 out 1.0 out 1.5 out 2.0 out 2.0 out 3.0 out 2.25 out 3.0 out 6.0 in 0.5 out

CO2 at Low Fire (Offset) G25.3

%

7.70 8.10 8.10 8.10 8.10 7.90 8.10 8.20 8.20 8.00

CO G25.3

ppm

< 50 ppm

Low Fire Offset Pressure G25.3

Pa

-42

-60

-24

-33

-26

-70 -100 -140 -64

N/A

Flue Gas Temperature High Fire T

°C

161.1 179.9 176.3 182.6 176.9 163.9 170.5 152.8 171.1 146.8

Flue Gas Temperature Low Fire T

°C

65.0 71.1 78.7 68.2 74.7 72.8 76.9 75.8 72.1 61.0

Flue Pressure at Maximum Flue Resistance

Pa

3

6

70

10

19

18

11

14

23

6

Thermal Efficiency High Fire NCV

%

91.9 90.7 90.9 90.6 90.9 91.6 91.2 92.0 91.3 92.6

Thermal Efficiency Low Fire NCV

%

96.4 96.1 95.7 96.2 95.9 95.8 95.8 95.8 96.1 96.7

Ignition Controller Program Key

1,000 2,200 3,300 4,700 6,800 10,000 15,000 22,000 33,000 56,000

Table 4 Nominal Combustion Values with service door closed

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 25 of 52

Operation

In case the heat exchanger’s temperature is

too high, the burner will be switched off by

The appliance requires a 0-10VDC signal to control the burner. A value > 1.0VDC will indicate a heat demand and the combustion fan

the LC1 limit control (first safety). The burner automatically switches on again after cooling down and re-start will take place.

will start the pre-purge.

The limit control LC3, which operates at a higher

Before an ignition attempt the combustion

temperature setting, switches off the burner to

fan slows to ignition speed. When the ignition a lockout condition requiring a thorough check

C

speed has been reached the burner will attempt ignition.

of the heater and a manual reset via the LC3 limit control body followed by the lockout reset

switch. A cooling time of about 3 minutes is

If ignition is unsuccessful there will be another necessary before resetting.

purge followed by ignition. The total number of ignition attempts before lockout is 3.

LC3 reset switch

The spark electrode stays energised throughout the ignition attempt, even if the flame has been established.

Once the flame has been sensed the burner will run at the ignition speed for a few seconds to allow the flame to stabilise. Following flame stabilisation the fan speed will increase to high fire to allow the heat exchanger to warm up quickly.

LC3 reset switch Photon 10-20

After a short delay the air movement fan will start. Once warm up has completed the burner is released to the control of the 0-10VDC thermostat and will modulate to the requested heat demand.

LC3 reset switch

The burner will begin to modulate before the set temperature has been reached. At this point the burner rate will adjust according to the heat demand from the thermostat. When set point temperature is reached the burner will turn off and the appliance will post-purge to dissipate any residual heat.

LC3 reset switch Photon 25-100

If, for any reason, the burner flame is extinguished during a run cycle, an automatic attempt at re-ignition will take place. If after three ignition attempts the burner does not relight, safety shut down and lockout will occur. Manual intervention to reset will be necessary to put the unit back into service.

LC3 reset switches

In the event of overheating for any reason, overheat controls operate to switch off the burner.

LC3 reset switches Photon120

Page No 26 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Burner On light

Lockout reset switch

To turn off the air heater for a short period, turn the room thermostat to a lower setting (a voltage below 0.8VDC will be deemed as no heat demand). To relight, reset the thermostat.

LED status light

Lockout indication light

Reset switch and status lights

To turn off the heater for a prolonged period,

turn the room thermostat to lowest setting and

turn off the gas supply to the appliance. Switch

off electrical supply to the air heater only after

the air circulation fan has stopped. To relight,

follow the start up instructions.

C

The appliance is fitted with an LED status light. This can be used to determine the current status of the appliance and help to diagnose fault conditions. See LED Status table below for more information.

Gas and electricity must only be turned off in case of emergency or for prolonged periods of shutdown of the air heater.

Figure 9 LED Status

Standby Pre-purge Ignition Stabilisation Unit is functioning General lockout Lockout due to LC3 over temperature LC1 open or short circuit / program key error

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 27 of 52

C

Start position Pre-purge time Safety time
Post-purge time

The system is not in lock-out and can proceed with the start up sequence upon a demand for heat
This is a period of 35 seconds during which the combustion fan operates prior to activation of the ignition device.
The safety time is the delay between the gas valve being energised and the flame sensor checking for the presence of a flame. This is a period of 4 seconds.
Note : if no flame is sensed, the burner controller will attempt ignition 3 times before going into lock-out mode.
This is the time of 255 seconds between burner shut-down and the moment the combustion fan is de-energised.

Figure 10 Ignition system timetable

Page No 28 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Maintenance
Photon 10-20 component layout

Venturi

Burner

Modulating gas valve

LC3 limit control bracket and reset
LC1 limit control mounting bracket

Axial fan

MS

Burner on indicator
LED status light
Reset switch and burner lockout

Combustion fan

Controls bracket

Gas connection

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 29 of 52

Photon 25-70 component layout
Burner Venturi

Modulating gas valve

LC1 and LC3 limit control bracket

MS

Burner on indicator
LED status light
Reset switch and burner lockout

Combustion fan

Controls bracket with LC3 reset

Axial fan Gas connection

Page No 30 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Photon 100 component layout
Burner

Modulating gas valve

LC1 and LC3 limit control bracket

Venturi

Burner on indicator
LED status light
Reset switch and burner lockout

Combustion fan

Controls bracket with LC3 reset

MS
Axial fan x2
Gas connection

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 31 of 52

Photon 120 component layout

Burner

LC3 limit control bracket

Modulating gas valve

MS
Venturi

LED status light
Burner on indicator
Reset switch and burner lockout

Combustion fan

Controls bracket with 2 off LC3 reset

LC1 and LC3 limit control bracket
Gas connection

Page No 32 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Maintenance schedule
Before commencing, turn off the main gas supply and switch off the main electricity supply after the air circulation fan has stopped.
Always consult your distributor at the slightest doubt.

Replacement of gas valve
1. Unplug the gas valve and combustion fan power cables.

Combustion fan

Gas valve

The unit will operate with a minimum

of maintenance. It is recommended that

maintenance is carried out at least once a year

by a suitably qualified person. More frequent

MS

servicing may be required dependent upon the environmental circumstances where the unit is installed. Regular inspection is necessary,

2. Disconnect the gas supply union inside the cabinet and unscrew the gas pipe.

especially in dirty areas, to assess the servicing

Fixings

frequency.

Check condition and security of flue and

Union

combustion air system. Check for security and

worthiness of the suspension or mounting

system.

The following procedures should be carried out at least once each year:

· Clean all dirt, lint, and grease from the fan and motor.

3. Unscrew the outer 8mm nuts securing the combustion fan to the burner.

· Check the heat exchanger internally and externally for evidence of physical damage.

· Check the burner for scale, dust, or lint accumulation. Clean if required.

· Check the vent or vent/combustion air system for soundness. Replace any parts that do not appear sound.

8mm nuts

8mm nuts

· Check the wiring for any damage. Replace damaged wiring.
Heat exchanger maintenance

4. Remove the gas valve / combustion fan assembly from the unit.

Remove any external dirt or dust accumulation. Visually check the heat exchanger for cracks and holes. If a crack or hole is observed, replace the heat exchanger.

Photon 10-70 gas valve flange assembly
Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 33 of 52

5. The gas valve can now be disconnected from the venturi by removing the fixing screws. There are 3 screws on Photon models 10-70 and 4 screws on Photon models 100-120. To gain access to the venturi fixing screws on the gas valves for the Photon 100 and 120 models, the combustion fan must be first removed.

MS

3 off Fixing screws

6 off Fixing screws
Photon 120 remove combustion fan to reveal gas valve fixing screws
4 off Fixing screws

Photon 10-70 gas valve fixing screws

6 off Fixing screws

Photon 120 gas valve fixing screws
6. The gas supply pipe with flange can be removed by unscrewing the 4 fixings. Do not lose the o-ring seal.

O ring
Photon 100 remove combustion fan to reveal gas valve fixing screws

4 off Fixing

screws

Photon 10-70 gas valve inlet flange assembly

O ring

Photon 100 gas valve fixing screws

Photon 100 gas valve inlet flange assembly

Page No 34 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

O ring

Photon 120 gas valve inlet flange assembly
7. Refit gas valve in reverse order ensuring the o-ring is fitted between the gas valve and venturi.
8. Follow start up and commissioning procedures.

Venturi cleaning and replacement
1. Clean the venturi inlet with a lint free cloth.

2. For replacement follow steps 1 to 5 from gas valve replacement.

3. Separate the venturi from the combustion fan by removing the fixings (2 screws models 10-70 and 6 screws models100-120 as per the photographs shown under gas valve replacement).

Throttle Screw

Fixing Screws

Photon 120 venturi

4. Before fitting new venturi, ensure throttle screw is fully closed (turn throttle clockwise

MS

for models 10-70 and anticlockwise for

model 100. Do not overtighten. Model

120 has the throttle integrated into the gas

valve.

5. Replace cork gasket (models 10-70) or o-ring (models 100-120) between combustion fan and venturi.

Gasket

Photon 10-70 combustion fan

O-ring
Photon 10-70 venturi

Throttle Screw

Photon 100-120 combustion fan

Photon 100 venturi

6. Refit remaining items in reverse order.
7. Follow start up and commissioning procedure.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 35 of 52

Combustion fan cleaning and replacement
1. Follow steps 1 to 4 from gas valve replacement and step 3 from venturi replacement.
2. Clean fan body with a lint free cloth and blow any dirt out of the wheel using compressed air (air should not exceed 1.5 bar).
3. Check condition of fan wheel. If damaged
MS replace fan.
4. On models 10-70 there is a mounting plate that will need to be transferred across to the new fan.
5. To remove unscrew the 8mm nuts.
4 off 8mm nuts

Burner cleaning and replacement
1. Follow steps 1 to 4 from gas valve replacement.
2. Unscrew the burner fixings with a deep 10mm socket.
10mm nuts
3. The burner can now be removed. 4. Rinse the burner body with clean water
and dry. 5. Inspect the burner for cracks, holes or splits
in the mesh. If damaged the burner should be replaced.

6. Attach new gasket to fan outlet flange (all models) and fit mounting plate (models 10-70 only)
Fan outlet flange gasket

7. Refit remaining items in reverse order.
8. Follow start up and commissioning procedure.

Burner with face insulation in place

Page No 36 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Burner with face insulation removed
6. The burner mesh can be cleaned by either placing it under clean running water or by immersing it in a container full of clean water. The burner should be allowed to dry naturally or be blown dry using compressed air (drying air should not exceed 1.5 bar).
7. Fit replacement burner gasket.
8. Refit in reverse order.
9. Follow start up and commissioning procedure.
Burner chamber / tube insulation check and replacement
1. The insulation material is a mixture containing Refractory Ceramic Fibres (RCF) / Alumino-Silicate Wools (ASW). Do not handle until all safety instructions have been read.
2. Wear appropriate PPE such as gloves, protective clothing, eye protection, and respiratory protection. Follow all local regulations and industrial hygiene standards.
3. Handle insulation with care to minimise airborne dust.
4. Dispose of waste in accordance with local regulations, such as a landfill licensed for this purpose.

5. Unless wetted, such waste may be dusty and should be properly sealed in containers for disposal.

6. The Material Safety Data Sheet is available from the appliance manufacturer.

7. With the burner removed the integrity of the combustion chamber and tube insulation can be verified. It is normal for small superficial cracks to be present in the surface of the insulation.

Tube insert

MS

Chamber insulation

Probes

8. Remove any debris from inside the burner chamber. A vacuum with a minimum of M Class dust extraction rating can be used. Do not use compressed air.
9. Check the integrity of the insulation. Use a torch to inspect the insulation sleeves fitted into each tube. Broken tube inserts or the presence of deep cracks or warping indicate that the insulation needs to be replaced.
10. To remove the chamber insulation the burner probes must first be removed. See cleaning and replacement of burner probes for procedure.
11. With the burner probes removed the insulation block can be pulled out from the chamber. This will reveal two additional thin strips of insulation material. The first is located at the front of the chamber where the tubes are secured. The second is located on the lower right side of the chamber where the probes are normally located. Replace both of these thin insulation strips with new whenever the cast insulation block is removed. Ensure the lower right insulation strip has the preformed holes lined up with the probe holes in the side of the chamber.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 37 of 52

Chamber front insulation
Chamber side insulation
MS
12. The tube inserts can now be accessed and withdrawn from the tubes.
Tube inserts
13. Refit replacement tube inserts, tube insert spacer gaskets and chamber insulation ensuring the chamber insulation is correctly orientated, so the cut outs line up with the burner probe position.

No gap between tube insert and chamber insulation
15. Refit burner probes, ensuring probe gaskets are replaced with new.
16. Refit in reverse order ensuring a new burner gasket is installed.
17. Follow start up and commissioning procedure.
Replacement of burner probes
1. Open the access door on the side of the unit.
2. Disconnect the spark and flame sensor cables from the ignition transformer and ignition controller
3. Remove the probe assembly access panel via the 4 off 10mm retaining bolts on the inside of the heater next to the ignition control box.

Tube insert spacer gasket

Probe cut outs

14. Confirm the tube inserts slot into the corresponding recess in the front face of the chamber insulation block and gently pull them towards the chamber insulation. Ensure there are no gaps between the chamber insulation and tube inserts. Up to three tube insert spacer gaskets may be needed per tube insert.

4. The probe assembly can be seen on the left hand side with the access panel removed.
5. Remove the 2 off 10mm retaining bolts from the heat exchanger tabs.
6. Remove the probe assembly bracket.

Page No 38 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

9. Check that the replacement gaskets are flat on the combustion chamber and there are no signs of damage.

10. Replace the probe assembly access panel using the 4 off 10mm retaining nuts.

11. Reconnect the spark and flame sensor cables to the ignition transformer and ignition controller

12. Close the access door on the side of the

unit.

MS

7. Carefully place the two off replacement

13. Re-instate the gas and electric supplies

probe gaskets within the replacement probe

having checked that everything is in its’

kit onto the probe assembly bracket before

correct location and all associated screws

refitting on to the unit.

and nuts are tight.

All gaskets associated with the Photon heater have been designed for SINGLE USE ONLY and MUST be replaced when carrying out the steps previously listed.

8. Install the replacement probe bracket onto the side of the combustion chamber using the 10mm retaining bolts.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 39 of 52

Replacement of LC1 and LC3 safety thermostats (Models 25-120)
1. Disconnect LC1 and LC3 electrical connectors.

Typical LC1 connector
MS

Typical LC3 connector
2. Remove LC3 protective cap and lock nut. Note that there are two fitted to the Photon 120 unit.

Location of LC3 protective cap and lock nut on Photon 10-100

Location of 2nd LC3 protective cap and lock nut on Photon 120

3. Unscrew the 2 fixings from the mounting bracket.
Fixing screws x2

5. The thermostats can now be removed from the mounting bracket.
6. Replace one or both thermostats as needed. Ensure sensor is pushed up to the return at the end of the bracket and secured in place with the retaining clips. Replace clips if necessary. Ensure thermostat is held tightly by the retention clips. It may be necessary to close the clips with pliers before fitting the thermostat.
7. Refit all parts in reverse order. Press LC3 button to reset thermostat.
8. Seal gaps around thermostat mounting bracket with silicone sealant to maintain the integrity of the burner compartment.
Silicon sealant around mounting bracket
9. Follow start up and commissioning procedure.
Replacement of LC1 and LC3 safety thermostats (Models 10-20)
1. LC1 replacement is exactly the same as for models 25-120.
2. To replace LC3, disconnect electrical connectors.

4. Withdraw mounting bracket from heater.

Thermostat mounting bracket

LC3 and panel location models 10-20

Page No 40 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

3. Unscrew the 2 fixing screws.
4. The thermostat can now be removed from the heater.
5. Replace thermostat and refit all parts in reverse order.
6. Press button on thermostat to reset.
7. Follow start up amd commissioning procedure.
Replacement of ignition controller
1. Disconnect all electrical connections.
2. Unscrew fixings located in the corners of the controller.
3. Remove program key and refit into new controller.
4. Fix new controller to electrical panel and reattach all wiring.
5. Follow start up and commissioning procedure.
Replacement of ignition transformer
1. Disconnect all electrical connections.
2. Unscrew fixings and remove transformer.
3. Refit in reverse order.
4. Follow start up and commissioning procedure.
Replacement of lockout circuit board
1. Disconnect all electrical connections.
2. Pinch circuit board retention clips to release.
3. Refit in reverse order.
4. Follow start up and commissioning procedure.

Replacement of fan relay
1. Disconnect all electrical connections, including blanking connector.
2. Unscrew fixings and remove relay.
3. Refit in reverse order, ensuring blanking connector is fitted to the normally closed terminal.

Blanking connector; this terminal will be live whenever the unit axial fan is NOT in operation so it must be covered.

MS

4. Follow start up and commissioning procedure.
Replacement of air circulation fan
1. Open access door and disconnect fan motor cables.
2. Loosen cable gland and retract cable.
3. Unscrew fixings securing fan to rear of appliance.
4. The fan can now be removed from the unit. For safety reasons it is recommended to wear gloves when handling the fan.
5. Disassemble and replace parts as needed, then reassemble.
6. Be sure the fan blade is in the proper position on the shaft – refer to diagram overleaf for model 10 and 20.

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 41 of 52

Unit operation
The combustion and correct operation of the appliance should be verified as a part of the normal service routine. Follow the steps in the start up and commissioning procedures to verify.

MS

Dimension A Model

10

20

Distance mm

49

77

7. Replace in reverse order.

8. Rotate the fan blade by hand to check for adequate clearance. If adjustment is required, loosen the mounting screws, reposition the fan guard and tighten the screws. Rotate the fan blade and recheck. Repeat as necessary.

9. Follow start up and commissioning procedure.

Flue and combustion air
Check the complete system at least once a year. The inspection should include all joints, seams, concentric adapters and the flue terminal cap. Replace any defective or heavily corroded parts.
Fan motor and fan maintenance
The fan motor is equipped with thermal overload protection of the automatic reset type.
Should the motor fail to run, it may be because of improper voltage characteristics. Make certain that the correct voltage is available at the motor.
Remove dirt and grease from the motor, the fan guard and the fan blades. Use care when cleaning the fan blades to prevent causing misalignment or imbalance.

Page No 42 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Fault Finding

START

Photon Troubleshooting
Guide

YES

Ensure gas & electricity supplies are enabled. Turn external controls to
call for heat.

Does the LED status light illuminate?

CHECK: –

1. Voltage is correct ­ see technical data table.

NO

Is there power to the burner?

YES

2. Ignition controller fuse. 3. Integrity of wiring connections. 4. Lockout reset circuit board

5. LED lamp.

6. Ignition controller.

NO
CHECK: 1. Operation of any external timer, thermostat or control. 2. External circuit breaker or fuse. 3. Voltage is correct ­ see technical data table. 4. Integrity of supply circuit.

Does the lockout light illuminate?
NO
Does the combustion fan run?

YES YES NO

Does the lockout light go
off after pressing switch for 3 seconds?

CHECK: –

1. LED status light flash codes.

2. LC3 safety thermostat reset switch.

3. LC1 safety thermostat (10k resistance).

NO

4. Lockout reset circuit board.

5. Ignition controller.

6. Flame sense probe.

7. Integrity of wiring connections.

Is there power to the fan?

YES

CHECK: –
1. Voltage supply to fan terminals is 230VAC / 50Hz. 2. Integrity of wiring connections. 3. Fan, including the free movement of the fan wheel.

YES

NO
CHECK: 1. Integrity of wiring connections. 2. Heat demand signal is > 0.95VDC. 3. OT terminals are linked or OpenTherm compatible thermostat connected with heat demand. 4. Ignition controller. 5. LED status light flash codes.

Does the burner ignite after a purge
period?
YES

NO

Does the burner spark?

YES

NO
CHECK: 1. Spark gap correct ­ see maintenance section. 2. Check ignition probes / leads for damage. 3. Spark probe not touching insulation. 4. Voltage supply to ignition transformer 230VAC / 50Hz during ignition. 4. Ignition transformer. 5. Ignition controller.

CHECK: –
1. Gas supply turned on / purged. 2. Supply pressure. 3. Voltage supply to gas valve plug 230VAC / 50Hz during ignition. 4. Ignition controller. 5. Throttle positioning ­ see commissioning data table. 6. Correct program key fitted. 7. Gas valve. 8. Integrity of appliance ground connection. 9. Probe leads connected / integrity. 10. Flame sensor probe clean. 11. Probes not touching insulation. 12. Flame signal (min. 1.0µA). 13. Air inlet / flue pipe for obstructions.

Does the burner stay on after stabilisation
time?

YES

Page 2

CHECK: –

1. Heat demand still present.

2. Gas supply purged.

3. Supply pressure.

4. Throttle positioning ­ see commissioning data table.

5. Flame sensor probe corroded.

NO

6. Flame signal (min. 1.0µA).

7. Flame sensor probe bent.

8. Integrity of appliance ground connection.

9. Probe leads connected / integrity.

10. Ignition controller.

11. Integrity of chamber insulation.

NOTE: presence of a flame is indicated by
the green lamp illuminating.
NOTE: presence of a flame is indicated by
the green lamp illuminating.

FF

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 43 of 52

FF

Page 2
YES
Does the circulation fan start after 30
seconds?

CHECK: –

1. Fan relay coil voltage 230V / 50Hz after 30 seconds from burner ignition.

2. Fan relay.

NO

3. Ignition controller.

4. Voltage supply to circulation fan.

5. Integrity of wiring connections.

6. Fan, including the free movement of the fan wheel.

YES

YES

YES

Does the burner remain running
after several minutes?

CHECK: –

1. Throttle positioning ­ see commissioning data table.

2. Flame sensor probe corroded.

NO

Does the burner attempt to relight?

YES

3. Flame signal (min. 1.0µA). 4. Flame sensor probe bent.

5. LC1 safety thermostat temperature not exceeding 95°C.

6. Air inlet / flue pipe for obstructions.

7. Integrity of chamber insulation.

NO

YES

CHECK: –
1. LED status light flash codes. 2. LC3 safety thermostat reset switch. 3. LC3 safety thermostat temperature not exceeding 96°C (71°C for models 10 and 20) 4. Lockout reset switch. 5. Heat demand still present.

NOTE: presence of a flame is indicated by
the green lamp illuminating.

END If the heater still fails to operate
correctly, contact your local representative.

YES

Page No 44 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Spare Parts
Description Ignition controller Ignition controller Ignition transformer Probe replacement kit Probe replacement kit Gas valve Gas valve Gas valve Gas valve Gas valve lead Gas valve lead Venturi with gasket/o-ring Venturi with gasket/o-ring Venturi with gasket/o-ring Venturi with gasket/o-ring Venturi with gasket/o-ring Venturi with gasket/o-ring Venturi with gasket/o-ring Combustion fan Kit 10-25 Combustion fan Kit 35-70 Combustion fan Kit 100 Combustion fan Kit 120 Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket
Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket Burner face insulation / burner gasket LC3 safety thermostat LC3 safety thermostat (2x model 120) LC1 safety thermostat Lockout reset circuit board Lockout reset switch LED lamp Green lamp Fan relay Burner wiring harness

Part Number 1030137 1031961 1030638 1038443 1038444 03-25800 03-25801 1030499 1030564 1030864 1030895 03-25700-055 03-25700-053 03-25700-002 03-25700-001 03-25700-051 1030764 1031374 1037269 1037270 1037271 1037272 1037190 1037191 1037192
1037193 1037194 1037195 1037196 1037197 1037198 1037199 1030945 03-24959 05-25167-5050 03-25327-01 60-61998 60-61997 28-50-038 30-61742-240V 1030366

Application 10-100 120 10-120 10-20 25-120 10-65 70 100 120 10-100 120 10-20 25 35 45 55-70 100 120 10-25 35-70 100 120 10 20 25
35 45 55 65 70 100 120 10-20 25-120 10-120 10-120 10-120 10-120 10-120 10-120 10-120

SP

Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 45 of 52

SP

Description Premix burner Premix burner Premix burner Premix burner Premix burner
Premix burner Premix burner Premix burner Premix burner Premix burner Axial fan assembly 10 Axial fan assembly 20 Axial fan assembly 25 Axial fan assembly 35-45 Axial fan assembly 55 Axial fan assembly 65 Axial fan assembly 70 & 120 Axial fan assembly 100 Axial fan cable gland Chamber Insulation Kit, Photon 10 Chamber Insulation Kit, Photon 20 Chamber Insulation Kit, Photon 25 Chamber Insulation Kit, Photon 35 Chamber Insulation Kit, Photon 45 Chamber Insulation Kit, Photon 55 Chamber Insulation Kit, Photon 65 Chamber Insulation Kit, Photon 70 Chamber Insulation Kit, Photon 100 Chamber Insulation Kit, Photon 120

Part Number 1030405 1030490 1030630 1030352 1030327
1030135 1030136 1030446 1030280 1030515 1037267 1037268 01-27007-01 1030858 01-27011-01 1030860 1030812 1030859 06-25524 1037350 1037351 1037352 1037353 1037354 1037355 1037356 1037357 1037358 1037359

Application 10 20 25 35 45
55 65 70 100 120 10 20 25 35-45 55 65 70 & 120 100 10-120 10 20 25 35 45 55 65 70 100 120

Page No 46 of 52 Photon, Installation Manual, EN 2023-05, D301310 Iss 4

ErP Table – G20
ErP
Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 47 of 52

Model
Item Type of Fuel Capacity Rated Heating Capacity Minimum Capacity Electrical Power Consumption At Rated Heating Capacity At Minimal Capacity In Standby Mode Useful Efficiency Useful Efficiency at Rated Heating Capacity Useful Efficiency at Minimum Capacity Other Items Envelope Loss Factor Flame Consumption Emissions of Nitrogen Oxides (Input Energy (GCV) Emission Efficiency ErP Seasonal Space Heating Energy Efficiency Thermal Efficiency at Rated Heating Capacity (NCV)

PHOTON

Symbol

Units

10

20

25

35

45

55

65

70

100 120

–

–

Natural gas G20

Pnom Pmin

kW

9.3 18.4 26.5 31.7 42.2 53.5 63.6 71.2 97.9 120.2

kW

4.9

9.4 15.4 16.6 23.2 25.2 36.7 40.8 51.5 64.2

elmax elmin elsb

kW 0.026 0.053 0.062 0.071 0.087 0.090 0.102 0.122 0.251 0.432 kW 0.020 0.025 0.036 0.025 0.039 0.027 0.037 0.045 0.053 0.125 kW 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001

th, nom

%

82.8 81.7 81.9 81.6 81.9 82.5 82.2 82.8 82.2 83.4

th,min

%

86.9 86.6 86.2 86.7 86.4 86.3 86.3 86.3 86.6 87.0

Fenv

%

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Pign

kW

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

NOx mg/kWh 31

50

49

39

51

57

63

69

64

59

s, flow

%

95.6 95.9 94.5 95.5 94.4 95.1 94.3 94.9 94.4 96.0

s

%

80.2 80.4 78.5 80.2 78.8 80.1 78.7 79.3 79.3 81.0

%

91.9 90.7 90.9 90.6 90.9 91.6 91.2 92.0 91.3 92.6

ErP Table – G25
ErP
Page No 48 of 52 Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

Model
Item Type of Fuel Capacity Rated Heating Capacity Minimum Capacity Electrical Power Consumption At Rated Heating Capacity At Minimal Capacity In Standby Mode Useful Efficiency Useful Efficiency at Rated Heating Capacity Useful Efficiency at Minimum Capacity Other Items Envelope Loss Factor Flame Consumption Emissions of Nitrogen Oxides (Input Energy (GCV) Emission Efficiency ErP Seasonal Space Heating Energy Efficiency Thermal Efficiency at Rated Heating Capacity (NCV)

PHOTON

Symbol

Units

10

20

25

35

45

55

65

70

100 120

–

–

Natural gas G25

Pnom Pmin

kW

9.2 18.4 26.4 31.7 42.2 53.4 63.5 71.4 97.4 119.5

kW

4.9

9.4 15.3 16.6 23.2 25.4 36.8 40.8 51.3 64.0

elmax elmin elsb

kW 0.026 0.053 0.062 0.071 0.087 0.090 0.102 0.122 0.251 0.432 kW 0.020 0.025 0.036 0.025 0.039 0.027 0.037 0.045 0.053 0.125 kW 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001

th, nom

%

81.9 82.0 81.6 81.7 81.8 82.4 82.0 83.0 81.8 83.0

th,min

%

81.6 86.5 86.0 86.5 86.3 87.0 86.4 86.3 86.3 86.8

Fenv

%

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Pign

kW

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

NOx mg/kWh 29

60

58

49

56

49

66

60

68

52

s, flow

%

95.6 95.9 64.5 95.5 94.4 95.1 94.3 94.9 94.4 96.0

s

%

79.4 80.4 78.2 80.1 78.8 80.6 78.7 79.3 79.0 80.7

%

91.0 91.0 90.5 90.7 90.8 91.5 91.0 92.1 90.8 92.1

ErP Table – G25.3
ErP
Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4 Page No 49 of 52

Model
Item Type of Fuel Capacity Rated Heating Capacity Minimum Capacity Electrical Power Consumption At Rated Heating Capacity At Minimal Capacity In Standby Mode Useful Efficiency Useful Efficiency at Rated Heating Capacity Useful Efficiency at Minimum Capacity Other Items Envelope Loss Factor Flame Consumption Emissions of Nitrogen Oxides (Input Energy (GCV) Emission Efficiency ErP Seasonal Space Heating Energy Efficiency Thermal Efficiency at Rated Heating Capacity (NCV)

PHOTON

Symbol

Units

10

20

25

35

45

55

65

70

100 120

–

–

Natural gas G25.3

Pnom Pmin

kW

9.2 18.4 26.5 31.6 42.2 53.4 63.8 71.1 97.4 119.1

kW

4.9

9.4 15.3 16.6 23.2 25.3 36.7 40.9 51.4 64.0

elmax elmin elsb

kW 0.026 0.053 0.062 0.071 0.087 0.090 0.102 0.122 0.251 0.432 kW 0.020 0.025 0.036 0.025 0.039 0.027 0.037 0.045 0.053 0.125 kW 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001

th, nom

%

81.6 81.7 81.7 81.5 81.8 82.3 82.1 82.7 81.9 82.7

th,min

%

86.0 86.3 86.1 86.5 86.4 86.9 86.3 86.4 86.4 86.7

Fenv

%

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

Pign

kW

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

0.0

NOx mg/kWh 29

58

55

62

61

58

66

68

68

63

s, flow

%

95.6 95.9 94.5 95.5 94.4 95.1 94.3 94.9 94.4 96.0

s

%

79.4 80.2 78.3 80.0 78.8 80.5 78.6 79.3 79.1 80.6

%

90.6 90.7 90.7 90.5 90.8 91.4 91.1 91.8 90.9 91.8

Notes

Notes

This document replaces the previous Manual Part No. Reznor, Photon, Installation Manual, EN 2022-07, D301310 Iss 3
Current full Part No. Reznor, Photon, Installation Manual, EN 2023-05, D301310 Iss 4

NORTEK GLOBAL HVAC (UK) LTD Fens Pool Avenue Brierley Hill West Midlands DY5 1QA United Kingdom Tel +44 (0)1384 489700 Fax +44 (0)1384 489707 reznorsales@nortek.com www.reznor.eu
Nortek Global HVAC is a registered trademark of Nortek Global HVAC limited. Because of the continuous product innovation, Nortek Global HVAC reserves the right to change product specification without due notice.

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