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Installation and maintenance instructions ecoTEC exclusive 0020193968_05
12.8.4 Installing the compact thermal module
1
2
3
7
5
6
4
1.
Connect the compact thermal module
(2)
to the heat
exchanger
(1)
.
2.
Tighten the nuts
(7)
in a cross-wise pattern until the
burner flange fits closely and uniformly onto the mating
surfaces.
–
Tightening torque: 6 Nm, if a torque spanner is
available
3.
Reconnect the plug
(4)
to the gas valve assembly.
4.
Reconnect the plug
(5)
for the earth wire and the plug
(6)
for the ignition line.
5.
Reconnect all of the plugs to the fan motor
(3)
.
6.
Connect the gas pipe using a new seal. In the process,
secure the gas pipe against twisting.
7.
Open the gas stopcock.
8.
Make sure that there are no leaks.
9.
Check that the sealing ring in the air intake pipe is posi-
tioned correctly in the seal seat.
10.
Reconnect the air intake pipe to the intake stub.
11.
Secure the air intake pipe with the retaining screw.
12.
Check the gas flow pressure. (
→
Page 30)
12.9
Clean the condensate siphon and check the
condensate discharge pipe
1.
Remove the lower section of the condensate siphon.
2.
Flush out the lower section with water.
3.
Fill the lower section:
–
VUW 356/5-7: With water until around 10 mm be-
low the upper edge
–
VUW 436/5-7: With water until two-thirds full
4.
Secure the lower section to the condensate siphon.
5.
Check that the condensate discharge pipe is in good
condition, check it for tightness and that it drains cor-
rectly.
6.
Check whether all of the externally routed condensate
discharge pipes are dimensioned correctly and have
been insulated sufficiently (frost protection).
12.10 Draining the product
1.
Close the service valves of the product.
2.
Start the check programme
P.06
(diverter valve mid-
position).
3.
Open the drain valves.
4.
Make sure that the cap of the automatic air vent on
the internal pump is open so that the product can be
drained fully.
12.11 Cleaning the filter in the cold water inlet
1
2
1.
Close the cold water stop valve.
2.
Drain the product on the hot water side.
3.
Unscrew the cap nut
(1)
and the lock nut
(2)
from the
product's casing.
4.
Tilt the electronics box forward.
2
1
3
5.
Remove the water hammer arrester's casing
(3)
.
6.
Unscrew the cap nut
(1)
underneath the water hammer
arrester.
7.
Remove the pipe
(2)
from the product.
8.
Ensure that you do not damage the heat insulation on
the pipe.
9.
Rinse the filter under a jet of water, holding it against
the direction of flow.
10.
If the filter is damaged or it can no longer be cleaned
sufficiently, you must replace the filter.
11.
Refit the pipe.
12.
Always use new seals.
13.
Retighten the cap nut on the water hammer arrester
and fit the casing.
