ecoTEC exclusive installation and maintenance instructions / 0020017768_02
32
Proceed as follows to dismount it:
• Turn the appliance off on the main switch.
• Isolate the unit from the electrical mains.
• Cut off the gas supply to the device.
• Close the maintenance cocks on the appliance.
• Remove the front cover from the device.
• Swing off the electronic box.
5
4
3
2
1
6
Fig. 8.1 Dismantling compact thermal module
• Remove the screw (
3
) and remove the air inlet pipe (
1
)
from the inlet spigot on the gas fi
t
ting.
• Separate the gas supply pipe (
6
) on the gas fitting.
Secure the gas corrugated pipe against twisting by
bracing the pipe on the wrench surface while loosen-
ing the union nut.
a
Caution!
Damage to the gas pipe!
Under no circumstance may the compact
thermal module be suspended from the flexible
corrugated gas pipe.
• Pull the two plugs of the ignition und grounding lines
off the ignition electrode (
4
).
• Only ecoTEC exclusive 832: Pull the cable plug off the
fan motor and the cable off the gas fitting.
Only ecoTEC exclusive 838: Open the mains coupling
to the fan.
• Undo the five nuts (
2
).
• Pull the entire compact thermal module (
5
) off the
heat exchanger.
• After dismantling the burner and the heat exchanger,
check for damage and dust and, if necessary, clean
the components as described below.
8.4.2 Clean the heat exchanger
a
Caution!
Protect the electronics box turned down
against sprayed water.
1
2
3
4
Fig. 8.2 Clean the heat exchanger
• Remove the compact thermal module (see Chapter 8.4.1).
• Clean the pipes (
3
) of the heat exchanger (
4
) using
regular vinegar. Flush with water. The water flows out
of the heat exchanger through the water condense trap.
• After a soaking time of approx. 20 minutes, flush away
the dirt particles that have come loose with a powerful
water jet. Avoid pointing the water jet directly at the
insulating surface (
2
) on the back of the heat exchanger.
8 Inspection and maintenance
