11 Maintenance and service
Installation and operation manual
34
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
12
Remove the connector from the fan and the ignition unit from
the gas valve.
13
Unscrew the coupling below the gas valve.
14
Unscrew the socket head screws from the front cover and
remove the socket complete with gas valve and fan to the front.
NOTICE
Make sure that the burner, insulation plate, gas valve, gas
supply and fan do NOT get damaged.
11.3
To clean the inside of the gas
boiler
1
Clean the heat exchanger from top to bottom with a plastic
brush or compressed air.
2
Clean the underside of the heat exchanger.
3
Clean the condensate drain pan with water.
4
Clean the condensate trap with water.
11.4
To assemble the gas boiler
CAUTION
▪ During maintenance, the front plate seal MUST be
replaced.
▪ When assembling, check the other seals for damage,
such as hardening, (hairline) fracture and discoloration.
▪ If necessary, place a new seal and check the correct
positioning.
▪ If retarders are not or incorrectly fitted, it may lead to
serious damage.
1
Check the correct position of the seal around the front cover.
2
Place the front cover on the heat exchanger and secure by
using the socket head screws plus serrated lock washers.
3
Tighten the socket head screws equally hand-tight by turning
the hex key clockwise.
4
Fit the gas connection below the gas valve.
5
Fit the connector to the fan and the ignition unit to the gas
valve.
6
Fit the condensate drain by sliding on the exchanger outlet
stump with the condensate trap connection still in front of the
base tray.
a
a
Base tray
7
Turn the condensate drain to the left and push it downwards
into the condensate trap connection. Make sure in doing this
that the back of the condensate drain pan comes to rest on the
lug of the back of the base tray.
8
Fill the condensate trap with water and fit it to the connection
below the condensate drain pan.
9
Slide the flue pipe, turning it counterclockwise, with the top
around the flue adapter into the top cover.
10
Insert the bottom into the condensate drain pan and tighten the
coupling nut clockwise.
11
Open the gas tap and check the gas connections below the gas
valve and on the mounting bracket for leakage.
12
Check the space heating and the water pipes for leakages.
13
Turn on the main power supply.
14
Turn on the appliance by pushing the button.
15
Check the front cover, the fan connection on the front cover and
the flue pipe components for leakage.
16
Check the gas/air adjustment.
17
Fit the casing, tighten the 2 screws on the left and right side of
the display.
18
Close the display cover.
19
Check the heating and hot water supply.
