7 Installation
Installer reference guide
33
C08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
To connect the water piping for domestic hot
water (applicable for Switzerland)
For Switzerland, domestic hot water should be made by a domestic
hot water tank. The domestic hot water tank must be installed with a
3-way valve to the space heating piping. Refer to the manual of the
domestic hot water tank for more details.
7.9.5
To fill the space heating circuit
Before filling the space heating circuit, the gas boiler MUST be
installed.
1
Flush the installation thoroughly to clean the circuit.
2
Connect the water supply hose to the drain point (field supply).
3
Power up the gas boiler to see the pressure indication on the
boiler display.
4
Make sure that the air purge valves of the gas boiler and the
heat pump module are open (at least 2 turns).
5
Fill the circuit with water until the boiler display indicates a
pressure of ±2 bar (with a minimum of 0.5 bar).
6
Purge air from the water circuit as much as possible.
7
Disconnect the water supply hose from the drain point.
NOTICE
The water pressure indicated on the boiler display vary
depending on the water temperature (higher pressure at
higher water temperature).
However, at all times water pressure shall remain above
1 bar to avoid air entering the circuit.
NOTICE
▪ Air in the water circuit can cause malfunctioning. During
filling, it may not be possible to remove all the air from
the circuit. Remaining air will be removed through the
automatic air purge valves during the initial operating
hours of the system. Additional filling with water
afterwards may be required.
▪ To purge the system, use the special function as
described in the chapter
"10 Commissioning" on
page 69
. This function should be used to purge the
heat exchanger coil of the domestic hot water tank.
7.9.6
To fill the domestic water circuit of the
gas boiler
1
Open the main tap to pressurize the hot water section.
2
Vent the exchanger and the pipe system by opening a hot water
tap.
3
Leave the tap open until all air has disappeared from the
system.
4
Check all connections for leaks including internal connections.
7.9.7
To fill the domestic hot water tank
For installation instructions, see the installation manual of the
domestic hot water tank.
7.9.8
To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent reduction of the heating capacity.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
7.10
Connecting the electrical wiring
7.10.1
About connecting the electrical wiring
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1
Making sure the power supply system complies with the
electrical specifications of the heat pump.
2
Connecting the electrical wiring to the outdoor unit.
3
Connecting the electrical wiring to the indoor unit.
4
Connecting the main power supply of the indoor unit.
5
Connecting the main power supply of the gas boiler.
6
Connecting the communication cable between the gas boiler
and the indoor unit.
7
Connecting the user interface.
8
Connecting the shut–off valves.
9
Connecting the domestic hot water pump.
10
Connecting the alarm output.
11
Connecting the space heating ON/OFF output.
12
Connecting the safety thermostat.
7.10.2
Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
7.10.3
Guidelines when connecting the electrical
wiring
Keep the following in mind:
▪ If stranded conductor wires are used, install a round crimp-style
terminal on the end of the wire. Place the round crimp-style
terminal on the wire up to the covered part and fasten the terminal
with the appropriate tool.
b
a
a
Stranded conductor wire
b
Round crimp-style terminal
▪ Use the following methods for installing wires:
Wire type
Installation method
Single-core wire
c b
c
a
a
A
AA´
A´
a
Curled single-core wire
b
Screw
c
Flat washer
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