Central Heating 12HT Dual Clima HT Instruction Manual

: September 18, 2024
: Central Heating

12HT Dual Clima HT

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Specifications:

Model: Dual Clima HT
Heat Pump Dimensions:
- 12HT: A: 898mm, B: 140mm, C: 476mm, D:
  62mm
- 16HT: A: 1320mm, B: 466mm, C: 150mm, D:
  140mm
Hydronic Port Size: Flow, Return, Drain
Condensate Management: Details for condensate
pan and drainage
Maximum Pipe Lengths: Details for primary pipe
length
Heat Pump Clearances: Minimum clearances and
mounting requirements
Guidelines for Safe Use of Hydrocarbon
Refrigerants: Safety considerations

Product Usage Instructions:

1. Installation Advice:

Key information crucial for correct installation from Pre-Pipe
stage to Final Fit.

2. Condensate Management:

Ensure proper drainage for condensate to prevent slip hazards.
Use drain pan fitting for connection.

3. Maximum Pipe Lengths:

Refer to the table for maximum primary pipe lengths based on the
model. Consider additional circulation pump for longer lengths.

4. Heat Pump Clearances:

Observe minimum clearances required. Mount on anti-vibration
feet at least 80mm off the ground for correct air flow.

5. Guidelines for Safe Use of Hydrocarbon Refrigerants:

Consider safety precautions regarding refrigerants and high
temperatures. Fit the supplied sticker on the heat pump
controller.

6. Domusa Commissioning Guide:

Scan the QR code or visit the website for assistance in
completing installation. Contact aftersales@centralheating.co.nz
for further help.

Frequently Asked Questions (FAQ):

Q: What should I do if condensate freezes in winter?

A: Ensure proper drainage management to prevent condensate from
freezing. Consider piping to a suitable drain or soak pit.

Q: Can I install the heat pump without anti-vibration mounting

feet?

A: It is required to mount the heat pump on anti-vibration feet
to allow for correct air flow and prevent debris buildup.

Q: How do I handle hydrocarbon refrigerants safely?

A: Follow safety guidelines provided and ensure clearances from
ignition sources. Fit the supplied sticker to advise users of
hazards.

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Domusa
Dual Clima HT
Installation Advice

Installation Advice
The purpose of this document is to highlight key information that is crucial to correct installation. Details, important to Pre-Pipe stage through to Final Fit are included here.
Heat Pump Dimensions 12HT & 16HT

Hydronic Port Size Flow Return Drain

12HT
1″ Male 1″ Male ½” Male

16HT
1¼” Male 1¼” Male ½” Male

Dimensions A (mm) B (mm) C (mm) D (mm)

12HT 898 140 476 62

16HT 1320 466 150 140

Condensate Management
This is an underside view of the heat pumps condensate pan with dimensions for considerations around condensate management. Condensate can be piped to a drain such as a soak pit or free drain onto the concrete if a strip drain is being used around the Heat Pump. It is advised to make provisions to manage condensate as this can become a slip hazard when the condensate potentially freezes in winter. Connection to the heat pump can be made using the supplied drain pan fitting.

Maximum Pipe Lengths

The table below details the maximum primary pipe length for both 12HT and 16HT when using 32mm Multitubo pipe directly to a buffer tank. This can be increased with the use of an additional circulation pump. Review system design or contact engineering for more information.

Diameter (mm) 32

Max Pipe Length Flow + Return (m)

12HT

16HT

44

28

If no buffer tank is used and the heat pump is directly feeding underfloor or radiators these values may be reduced dependant on the system design. Again, this can be increased with the use of an additional circulation pump. Review system design or contact engineering for more information.

Heat Pump Clearances
Basic minimum clearances CHNZ require to be observed. Certain installations with enclosed areas may require larger clearances. See Installation manual for more detail.
It’s required that the heat pump be mounted on anti-vibration mounting feet, a minimum of 80mm off the ground. This will allow for correct air flow around the unit and prevent dirt and leaf debris building up at the base of the finned heat exchanger. HPKANTVIBR allows each corner of the heat pump to be adjusted for installations on uneven ground and includes fasteners.

Guidelines for the safe use of hydrocarbon refrigerants.
Consideration of clearances from ignition sources or areas for refrigerant to pool or collect.

Location Possible sources of ignition Electrical isolator switches – <IP67

Minimum Distance to be observed (m) 1.5m 0.5m

Combustion engines (generators)
Large un trapped drains or sewers where refrigerant cannot dissipate

1.5m 1.5m

Mandatory installation of deaerator on the primary flow is required. This is to mitigate any chance of the 1.45Kg (16kW) refrigerant charge, entering the system water and then being able to vent to an occupied space in the unlikely event of a heat exchanger failure. It is important to ensure a permanent power supply to the heat pump for antifreeze protection. The deaerator bleed cap must be left open.
CHNZ supply a FARDEAR1 as part of the heat pump KIT, this will integrate with the HPFIT16D or HPFIT12D Fitting Kit (sold separately) for ease of installation.

Heat Pump Fitting KIT Details

HPFIT16D – KIT

1

2

9

3

8 5 #7

4

6

HPFIT16D Flow connection size: 1″

HPFIT16D Return connection size: 1¼”

Fitting KIT Assembly
The image below details basic assembly of the HPFIT16D and HPFIT12D Fitting KIT, including integration of the FARDEAR1 FAR Deaerator. To achieve the dimensions stated on the previous page it is recommended that all fittings are threaded to the bottom threads where possible. CHNZ recommend using Loctite 55 thread cord, Hemp and Hawk White or other thread sealing products for these joints. Insulation of the fitting kit is required.
Flow Assembly
Return Assembly
HPFIT16D Required primary pipe fitting size for flow assembly: 1″ Recommended fitting: MT321MT Required primary pipe fitting size for return assembly: 1¼” Recommended fitting: MT32114MT HPFIT12D Required primary pipe fitting size for flow assembly: 1″ Recommended fitting: MT321MT Required primary pipe fitting size for return assembly: 1″ Recommended fitting: MT32114MT

Heat Pump Electrical Connections and Supply

Supply

Model 16HT 12HT

Supply
230VAC 50Hz
230VAC 50Hz

Max Current Draw (A)
27A
17A

Minimum cable size Recommende

(mm2)

d fuse size (A)

6mm2

32A

4mm2

25A

Key Heat Pump Specifications
For further detail, see Technical Characteristics in Installation and Operating Manual
Dual Clima 12HT
Capacity: 12kW COP: 4.48 @ 35/30/7°C Size: 898H x 1115W x 415D Weight: 125kg Power Supply: 230VAC Single Phase Max Current Draw: 17A Hydronic connection Port Size: 1″ Sound Pressure: 44 dB(A) (1m) Minimum system water volume: 48 litres. Minimum system flow rate: 16L/min. Origin: Spain
Dual Clima 16HT
Capacity: 16kW COP: 4.69 @ 35/30/7°C Size: 1320H x 1115W x 415D Weight: 175kg Power Supply: 230VAC Single Phase Max Current Draw: 27A Hydronic connection Port Size: 1-1/4″ Sound Pressure: 48 dB(A) (1m) Minimum system water volume: 60 litres. Minimum system flow rate: 20L/min. Origin: Spain

High Flow Temperature Warning Sticker
With underfloor installations it is important that high flow temperature i.e.

50°C are not introduce to the floor.
High temperatures can cause damage to certain construction materials as well as being uncomfortable.
Please fit the supplied sticker to the bezel/surround of the heat pump controller to advise users of hazards when increasing the setpoint.
Sticker can be found with the Commissioning Guide QR code sheet, fixed to the outside of the heat pump box.
If it is a radiator system, the above can be disregarded.

Attention before you commission
The Domusa Commissioning Guide has been created to assist you in completing your installation. Follow the instructions by scanning the QR code below or by visiting our
website.
For further assistance please contact: aftersales@centralheating.co.nz