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Installation
AirModule 6 720 813 268(2014/10) 14
7 Installation
7.1 Detailed discharge pipe installation requirements
(Combi model)
The discharge pipework must be routed in accordance with part G3 of
schedule 1 of the building Regulations.
The tundish should be vertical, located in the same space as the
unvented hot water cylinder and be as close as possible and within
600mm of the safety device e.g. the temperature relief valve. The dis-
charge pipe from the tundish should be:
• made of metal
• at least one pipe size larger than the nominal outlet size of the safety
device (larger sizes may be required if the equivalent hydraulic
resistance exceeds that of a straight pipe 9m long - refer to BS6700)
• terminate in a safe place where there is no risk to persons in the
vicinity of the discharge, and position safely from electrical devices
• have a vertical section of pipe at least 300mm long below the tundish
before any elbows or bends in the pipework.
Fig. 11 Typical discharge pipe arrangement
[1] Safety device (e.g. temperature relief valve)
[2] Metal discharge pipe (D1) from temperature relief valve to tunish
[3] 600mm maximum
[4] Tundish
[5] 300mm minimum
[6] Metal discharge pipe (D2) from tundish, with continous fall
[7] Discharge below fixed grating
[8] Fixed grating
[9] Trapped gulley
7.2 Preparatory pipework
▶ Fit heating system and cold/hot water connector pipes in the space
up to the heat pump module position.
7.3 Positioning
▶ Remove the packaging according to the instructions on the
packaging.
▶ Remove the supplied accessories.
7.4 Checklist
1. Install the heat pump module safety assembly (

Chapter 5.1.1)
and fill valve.
2. Fit the heat pump module leakage water hose(s).
3. Connect the heat pump and the heat pump module
(

Chapter 7.11).
4. Connect the heat pump module to the heating system
(

Chapter 7.12).
5. Install the outside temperature sensor (

Chapter 7.19.3) and room
controller (optional).
6. Connect the CAN-BUS wire between the heat pump and the heat
pump module (

Chapter 8.1).
7. Install any accessory (mixing module, solar module, pool module,
etc).
8. Connect EMS-BUS wire (optional) to accessories (

Chapter 8.2).
9. Fill up and bleed the hot water cylinder.
10. Fill up and vent the heating system before commissioning
(

Chapter 7.20).
11.Connect the heating system to the electrical system (

Chapter 8).
12.Commission the heating system by managing necessary settings in
the user interface (

Chapter 11).
13.Vent the heating system (

Chapter 14).
14.Check that all sensors show reasonable values (

Chapter 12.9.2).
15.Check and clean out the particle filter (

Chapter 18).
16. Check the heating system function following commissioning
(

Chapter 12.9).
NOTICE: Risk of operating problems due to pipe
contamination!
Particulates, metal/plastic filings, flax and thread tape
residue and similar material can get stuck in pumps,
valves and heat exchangers.
▶ Avoid particulates in the pipework.
▶ Do not leave pipe parts and connections directly on
the ground.
▶ Ensure that no filings remain in the pipes following
deburring.
Only qualified installers may carry out the installation.
The installer must follow applicable rules and regulations
and recommendations from the supplier.
6 720 806 768-05.1I
Valve
outlet
size
Size of
discharge
pipework
D1
Size of
discharge
pipework
D2
Maximum
length of
straight pipe
(no bends or
elbows)
Deduct the figure
below from the
maximum length for
each bend or elbow in
the discharge pipe
22 mm Up to 9 m 0.8 m
G1/2 15 mm 28 mm Up to 18 m 1.0 m
35 mm Up to 27 m 1.4 m
28 mm Up to 9 m 1.0 m
G3/4 22 mm 35 mm Up to 18 m 1.4 m
42 mm Up to 27 m 1.7 m
35 mm Up to 9 m 1.4 m
G1 28 mm 42 mm Up to 18 m 1.7 m
54 mm Up to 27 m 2.3 m
Table 9
The safety valve drain in the heat pump module should
be secured against frost and the drain pipe should lead
to a drain.
Each installation is different. The following check list will
provide a general description of the installation process.