Daikin EHYKOMB33AA2 [37/136] Installation
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Daikin EHYKOMB33AA2 [37/136] Installation

Daikin EHYKOMB33AA2 [37/136] Installation
7 Installation
Installer reference guide
37
EVLQ05+08CAV3 + EHYHBH05AA + EHYHBH/X08AA +
EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1A – 2016.02
7.10.5 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.
INFORMATION
For location of the air purge valve, see
"15.4.3Components: Indoor unit"on page101.
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 81. This function should be used to purge the
heat exchanger coil of the domestic hot water tank.
7.10.6 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.
7.10.7 To fill the domestic hot water tank
For installation instructions, see the installation manual of the
domestic hot water tank.
7.10.8 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling 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.
When the drain pan is installed, make sure to insulate the water
piping up to the drain pan to avoid condensation.
In case of EHYHBX
0.0 mm
a
a Drain pan kit
7.11 Connecting the electrical wiring
7.11.1 About connecting the electrical wiring
Before connecting the electrical wiring
Make sure:
▪ The refrigerant piping is connected and checked
▪ The water piping is connected
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 electrical meters.
10 Connecting the gas meter.
11 Connecting the domestic hot water pump.
12 Connecting the alarm output.
13 Connecting the space cooling/heating ON/OFF output.
14 Connecting the power consumption digital inputs.
7.11.2 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

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