WRDB - GB
14
Maintenance
6
Maintenance
B
Only use original spare parts.
B
Order the spare parts according to the spare parts
catalogue for the heater.
B
Replace the joints and removed O-rings with new
ones.
B
Only the following lubricants must be used:
– Hydraulic part: Unisilikon L 641 (8 709 918 413)
– Coil unions: HFt 1 v 5 (8 709 918 010).
6.1
Periodic maintenance work
Functional check
B
Check the operation of all safety, adjustment and
monitoring elements.
Heat exchanger
B
Check the heat exchanger is clean.
B
In case of dirt:
– Remove the heat exchanger and take out the limi-
ter.
– Clean the chamber with a powerful jet of water.
B
If dirt persists: Soak the plates in hot water with
detergent and clean thoroughly.
B
If necessary: De-lime the interior of the heat exchan-
ger and the connection pipes.
B
Install the heat exchanger using new joints.
B
Install the limiter on the support.
Burner
B
Check the burner annually and clean it if necessary.
B
If it is very dirty (grease, soot): Remove the burner,
soak it in hot water with detergent and clean it tho-
roughly.
Water filter
B
Replace
the water filter installed in the water automa-
tic entry.
Burner and pilot injector
B
Remove and clean the pilot burner.
B
Remove and clean the pilot injector.
6.2
Startup after maintenance work
B
Tighten all connections once more.
B
Read chapter 4 “Use” and chapter 5 “Adjustments”.
6.3
Heater purge
In case of a frost risk, proceed as follows:
B
Remove the fixing lock from the filter screw cap (no.
1) situated in the water automatic.
B
Remove the filter screw cap (no. 2) from the water
automatic.
B
Empty all the water contained in the heater.
Fig. 16 Purging
1
Lock
2
Filter screw cap
6.4
Combustion gas probe
Operation and precautions
This probe verifies the conditions of flue evacuation
and, in case of malfunction, it automatically turns off the
heater. This prevents the combustion gases from enter-
ing the room where the gas heater has been installed.
The probe restarts after a reset period.
If the heater turns off during operation:
B
Ventilate the room.
B
10 minutes later, turn on the heater once again.
Call a qualified technician if the same thing happens
again.
i
Maintenance must only be performed by a
qualified technician. After one or two
years of use a general overhaul must be
performed.
Warning:
Before performing any main-
tenance work:
B
Close the water flow valve.
B
Close the gas flow valve.
Warning:
Without a water filter in-
stalled, turning on the heater is prohibit-
ed.
Danger:
The probe must never be
turned off, modified or replaced with a
different part under any circumstances.
