Connecting The Electrical Wiring; To Connect The Main Power Supply Of The Gas Boiler; To Connect The Communication Cable Between Gas Boiler And Indoor Unit - Daikin EHYKOMB33AA Installation And Operation Manual

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. See the manual of the
domestic hot water tank for more details.
Flow resistance graph for appliance domestic hot
water circuit
Not applicable for Switzerland
l/min
15
13
11
9
7
5
3
1
0.2 0.4 0.6 0.8 1.0 1.2
0
The minimum flow for domestic hot water operation is 1.5 l/min. The
minimum pressure is 0.1 bar. A low flow (<5 l/min) can reduce
comfort. Make sure to set the setpoint high enough.
To connect the water piping for space heating
Use the straight brass fitting connections (accessory of the heat
pump unit).
1 The space heating piping of the boiler will be connected to the
indoor unit.
2 Install the straight brass fitting connections so that they
perfectly match the connection of both modules.
3 Tighten the straight brass fitting connections.
a b
a Outlet space heating
b Inlet space heating
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
bar
1.4 1.6 1.8 2.0
NOTICE
Make sure that the straight brass fitting connections are
tightened thoroughly to prevent leakage. Maximum torque
is 30 N∙m.
To fill the domestic water circuit of the gas boiler
1 Open the main tap to pressurise 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.
7.5

Connecting the electrical wiring

DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
7.5.1 To connect the main power supply of the
gas boiler
1 Connect the power supply cable of the gas boiler to a fuse (a)
(L: X2-2 (BRN), N: X2-4 (BLU)).
2 Connect the earthing of the gas boiler to an earthing terminal.
Result: The gas boiler performs a test.
display. After the test, appears on the service display (wait mode).
The pressure in bar is shown on the main display.
a
X2
DANGER: RISK OF ELECTROCUTION
A fused spur or an unswitched socket MUST be located no
more than 1 m from the appliance.
CAUTION
For installation in damp rooms, a fixed connection is
obligatory. When working on the electrical circuit ALWAYS
isolate the electric supply.
7.5.2 To connect the communication cable
between gas boiler and indoor unit
1 Open the gas boiler.
2 Open the switch box cover of the gas boiler.
7 Installation
appears on the service
Installation and operation manual
15