Danfoss Novi Termix One Type 2 Water Heater with Jacket User Guide

ENGINEERING TOMORROW
Operating Guide
Termix Novi

Novi Termix One Type 2 Water Heater with Jacket

Functional description

Instantaneous water heater with heat exchanger and flow compensated temperature controller. Designed for wall-mounting.
Application
The Termix Water heater is an instantaneous water heater featuring superb heat extraction and high performance. The Termix Water heater is suitable for flats, single-family houses as well as for small apartment buildings. The water heater is available in two sizes, either for 1 apartment, or up to 4 apartments. The Termix Water heater is applicable for decentralized heating systems. The heat exchanger in the Termix Water heater cools the district heating water very efficiently, thereby creating a very good operation
economy.
Domestic hot water (DHW)
The domestic hot water is prepared in the heat exchanger and the temperature is regulated by a flow controller with a integrated differential pressure controller.

Safety notes

3.1 Safety Notes– general
The following instructions refer to the standard design of substation. Special versions of substations are available on request.
This operating manual should be read carefully before installation and start- up of the substation. The manufacturer accepts no liability for damage or faults that result from non-compliance with the operating manual. Please read and follow all the instructions
carefully to prevent accidents, injury and damage to property. Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Please comply with the instructions issued by the system manufacturer or system operator.
Corrosion protection
All pipes and components are made of stainless steel and brass.
The maximum chloride compounds of the flow medium should not be higher than 150 mg/l.
The risk of equipment corrosion increases considerably if the recommended level of permissible chloride compounds is exceeded.
Energy source
The substation is designed for district heating as the primary source of energy. However, also other energy sources can be used where the operating conditions allow it and always are comparable to district heating.
Application
The substation is designed to be connected to the house installation in a frost-free room, where the temperature does not exceed 50 °C and the humidity does not exceed 60%. Do not cover or wall up the substation or in any other way block the entrance to the station.
Choice of material
Choice of materials always in compliance with local legislation.
Safety valve(s)
We recommend mounting of safety valve(s), however, always in compliance with local regulations.
Connection
The substation must be equipped with features that ensure that the substation can be separated from all energy sources (also power supply).
Emergency
In case of danger or accidents – fire, leaks or other dangerous circumstances – interrupt all energy sources to the station if possible, and seek expert help.
In case of discoloured or bad-smelling domestic hot water, close all shut-off valves on the substation, inform the operating personnel and call for expert help immediately.
REACH
All Danfoss A/S products fulfill the requirements in REACH. One of the obligations in REACH is to inform customers about presence of Candidate list substances if any, we hereby inform you about one substance on the candidate list: The product contains brass parts which contains lead (CAS no: 7439-92-1) in a concentration above 0.1% w/w.
Storage
Any storage of the substation which may be necessary prior to installation should be in conditions which are dry and heated.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
Please observe instructions carefully
To avoid injury to persons and damage to the device, it is absolutely necessary to read and observe these instructions carefully.
Warning of high pressure and temperature
Be aware of the installation’s permissible system pressure and temperature.
The maximum temperature of the flow medium in the substation is 120 °C.
The maximum operating pressure of the substation is 16 bar.
The risk of persons being injured and equipment damaged increases considerably if the recommended permissible operating parameters are exceeded.
The substation installation must be equipped with safety valves, however, always in accordance with local regulations.
Warning of hot surface
The substation has got hot surfaces, which can cause skin burns.
Please be extremely cautious in close proximity to the substation.
Power failure can result in the motor valves being stuck in open position. The surfaces of the substation can get hot, which can cause skin burns. The ball valves on district heating supply and return should be closed.
Warning of transport damage
Before substation installation, please make sure that the substation has not been damaged during transport.
IMPORTANT – Tightening of connections
Due to vibrations during transport all flange connections, screw joints and electrical clamp and screw connections must be checked and tightened before water is added to the system. After water has been added to the system and the system has been put into operation, re-tighten ALL connections.

Mounting

4.1 Mounting
Installation must be in compliance with local standards and regulations.
District heating (DH) – In the following sections, DH refers to the heat source which supplies the substations. A variety of energy sources, such as oil, gas or solar power, could be used as the primary supply to Danfoss substations. For the sake of simplicity,
DH can be taken to mean the primary supply.
Connections:

1. Domestic cold water (DCW)
2. Domestic hot water (DHW)
3. District heating (DH) supply
4. District heating (DH) return

Connection sizes:
DH+ DCW+ DHW: G ¾” (ext. thread)
Dimensions (mm):
Type 1 + 2 with insulation:
H 432 x W 300x D 155
Type 1 + 2 with cover:
H 442 x W 315 x D 155
Weight incl. cover: 7–9 kg (incl. packing)
Cover: Grey full-insulation

Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.The pipe placement can deviate from the shown drawing. Please note the markings on the station.

4.1.1 Installation
Mounting:
Adequate space
Please allow adequate space around the substation for mounting and maintenance purposes.
Orientation
The station must be mounted so that components, keyholes and labels are placed correctly. If you wish to mount the station differently please contact your supplier. Drillings
Where substations are to be wall-mounted, drillings are provided in the back mounting plate. Floor mounted units have support.
Labelling
Each connection on the substation is labelled.
Before installation:
Clean and rinse
Prior to installation, all substation pipes and connections should be cleaned and rinsed.
Tightening
Due to vibration during transport, all substation connections must be checked and tightened before installation.
Unused connections
Unused connections and shut-off valves must be sealed with a plug. Should the plugs require removal, this must only be done by an authorized service technician.
Installation:
Strainer
If a strainer is supplied with the station it must be fitted according to schematic diagram. Please note that the strainer may be supplied loose.
Connections
Internal installation and district heating pipes connections must be made using threaded, flanged or welded connections.

Design

5.1 Design Your substation might look different than the substation shown.
Design description
B Heat exchanger, DHW
N Circulation connection
63 Sieve
74 IHPT controller, DHW
5.2 Schematic diagram Your substation might look different than the schematic diagram shown.
Schematic description with GTU
B Heat exchanger, DHW
63 Sieve
62 GTU Pressure equalizer
74 IHPT controllerYour substation might look different than the schematic diagram shown.
Schematic description with safety valve

B Heat exchanger, DHW
2 Single check valve
2C Single check valve incl. circulation pipe
4 Safety valve
21 To be ordered separately
63 Sieve
74 IHPT controller
DHW: Domestic Hot Water
DCW: Domestic Cold Water
HWC: Hot Water Circulation
DH Supply: District Heating Supply
DH Return: District Heating Return

5.2.1 Technical parameters
Technical parameters

Controls

6.1 DHW temperature control
DHW temperature control
There are various types of DHW temperature control used in Danfoss substations.
DHW temperature should be adjusted to 45-50 °C, as this provides optimal utilisation of DH water. At DHW temperatures above 55 °C, the possibility of lime scale deposits increases significantly.
6.1.1 IHPT 90 controller (45–65 °)
IHPT is a self-acting flow-compensated temperature controller with integrated differential pressure controller.
The IHPT operates at its best at DH supply temperatures of up to 100 °C.
By turning the handle for temperature setting in (+) direction the setting is increased, by turning it in (-) direction the setting is decreased.

*Start position: Handle turned fully in (+) direction.
The values are intended as a guide.
6.1.2 Safety valve
The purpose of the safety valve is to protect the substation from excessive pressure.
The blow-off pipe from the safety valve must not be closed. The blow-off pipe outlet should be placed so that it discharges freely and it is possible to observe any dripping from the safety valve.
It is recommended to check the operation of safety valves at intervals of 6 months. This is done by turning the valve head in direction indicated.
6.1.3 Strainer
Strainers should be cleaned regularly by authorized personnel. The frequency of cleaning would depend on operating conditions and the manufacturer’s instructions. 6.1.4 GTU Pressure Equalizer
The GTU Pressure Equalizer absorbs the expansion on the secondary side of the Termix water heaters and can be used as a substitute to the safety valve.
Furthermore the pressure equalizer absorbs a possible increase in pressure, so a discharge outlet is omitted.
The GTU Pressure Equalizer may not be applied in systems with hot water circulation. 6.1.5 Circulation pipe
The circulation pipe set is mounted directly on the controller.
The set includes circulation pipe, single check valve and fitting. When mounting the hot water circulation directly on the controller the hot water circulation temperature will be equal to the idle temperature. The idle temperature is a few degrees lower than the
set domestic hot water temperature. 6.2 Maintenance
The substation requires little monitoring, apart from routine checks. It is recommended to read the energy meter at regular intervals, and to write down the meter readings.
Regular inspections of the substation according to this Instruction are recommended, which should include:
Strainers
Cleaning of strainers.
Meters
Checking of all operating parameters such as meter readings.
Temperatures
Checking of all temperatures, such as DH supply temperature and DHW temperature.
Connections
Checking all connections for leakages.
Safety valves
The operation of the safety valves should be checked by turning the valve head in the indicated direction.
Venting
Checking that the system is thoroughly vented.
Inspections should be carried out minimum every two years.
Spare parts can be ordered from Danfoss. Please ensure that any enquiry includes the substation serial number.
Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.

Troubleshooting

7.1 Troubleshooting in general
In the event of operating disturbances, the following basic features should be checked before carrying out actual troubleshooting:

• the substation is connected to electricity,
• the strainer on the DH supply pipe is clean,
• the supply temperature of the DH is at the normal level (summer, at least 60 °C – winter, at least 70 °C),
• the differential pressure is equal to or higher than the normal (local) differential pressure in the DH network – if in doubt, ask the DH plant supervisor,
• pressure on the system – check the HE pressure gauge.

Authorized personnel only
Assembly, start-up and maintenance work must be performed by qualified and authorized personnel only.
7.2 Troubleshooting DHW

strainer(s).
DHW circulation pump out of order or with too low setting.| Check circulation pump.
Defective or clogged non-return valve.| Replace – clean.
No electricity.| Check.
Wrong setting of automatic controls, if any.| To adjust an electronic controller for DHW, pls. note enclosed instructions for electronic controller.
Scaling of the plate heat exchanger.| Replace – rinse out.
Defective motorized valve.| Check (use manual function) – replace.
Defective temperature sensors.| Check – replace.
Defective controller.| Check – replace.
Hot water in some taps but not in all.| DCW is being mixed with the DHW, e.g. in a defective thermostatic mixing valve.| Check – replace.
Defective or clogged non-return valve on circulation valve.| Replace – clean.
Tap temperature too high; DHW tap load too high.| Thermostatic valve adjusted to a too high level.| Check – set.
Temperature drop during tapping.| Scaling of the plate heat exchanger.| Replace – rinse out.
Larger DHW flow than the substation has been designed for.| Reduce DHW flow.
Thermostatic control valve does not close| Temperature difference between DH supply and DHW set point too low.| Lower the set point temperature or increase the DH supply temperature.
Idle temperature too low (for stations equipped with IHPT).| Set point too low.| Turn thermostat in (+) direction.

7.3 Disposal

Disposal note
This symbol on the product indicates that it may not be disposed of as household waste..
It must be handed over to the applicable take-back scheme for the recycling of electrical and electronic equipment.

• Dispose of the product through channels provided for this purpose.
• Comply with all local and currently applicable laws and regulations.

Declaration

8.1 Declaration of conformity
Category 0 without electrical equipmentAny information, including, but not limited to information on selection of product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalogues descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the extent, explicit reference is made in a quotation or order confirmation. Danfoss cannot accept any responsibility for possible errors in catalogues, brochures, videos and other material.
Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without changes to form, fit or function of the product.
All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.

Gemina Termix A/S – Member of the Danfoss Group
danfoss.com « +45 9714 1444 – mail@termix.dk
16| © Danfoss | 2024.01
AQ110886472772en-020601 / LUK38040

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