To Connect The Main Power Supply Of The Gas Boiler; To Connect The Electrical Wiring To The Gas Boiler; Connecting The Gas Piping; To Connect The Gas Pipe - Daikin Altherma EHY2KOMB28AA Installation And Operation Manual

WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
NOTICE
Safety thermostat (normally closed contact). The
outdoor unit does not contain a safety thermostat. Make
sure to install a field-supplied safety thermostat in the heat
emitter system according to the applicable legislation.
However, you cannot connect the feedback signal from the
safety thermostat to the outdoor unit or gas boiler because
there are no terminals for the feedback signal. Because of
this, you also do not have to do any configuration on the
outdoor unit or gas boiler.
In any case, to prevent unnecessary tripping of the safety
thermostat, it is recommended that ...
▪ ... the safety thermostat is automatically resettable.
▪ ... the safety thermostat has a maximum temperature
variation rate of 2°C/min.
▪ ... there is a minimum distance of 2 m between the
safety thermostat and the motorised 3‑way valve
delivered with the domestic hot water tank.
▪ ... the safety thermostat setpoint is at least 15°C
greater than the maximum leaving water temperature
setpoint.
6.6.1 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.
6.6.2 To connect the electrical wiring to the gas
boiler
1 Open the gas boiler.
EHY2KOMB28+32AA
Daikin Altherma hybrid monobloc – Gas boiler module
4P538953-1 – 2018.06
appears on the service
6.7
6.7.1
2 Open the switch box cover of the gas boiler.
3 Enter the wiring through the bottom of the unit.
f
e
d
c
b
a
Part
Low voltage a Interconnection
cable between
outdoor unit and gas
boiler (current loop
(*)
PCB)
b Domestic hot water
tank thermistor
c Room thermostat or
heat pump
convector
High voltage d Power supply
e + f 3‑way valve
(*) For more information on the current loop installation, read
the manual in the accessory bag of the current loop.
4 If needed, remove the knock-out holes with a screwdriver and
attach the field supplied glands.
5 Connect the wiring to the appropriate terminals. See
"13.2.1 Wiring diagram: Gas boiler" on
6 Close the switch box cover of the gas boiler.
7 Close the gas boiler.

Connecting the gas piping

To connect the gas pipe

1 Connect a gas valve to the 15 mm gas connection of the gas
boiler and connect it to the field pipe according to local
regulations.
6 Installation
Description
Factory-mounted
cable gland
Knockout hole
Rubber grommet
Factory-mounted
cable gland
Knockout hole
page 37.
Installation and operation manual
15