Maintenance Of Comfofond-L Eco Battery; Replacing Circulation Pump; Replacing Expansion Vessel; Replacing Filling Valve - Zehnder ComfoFond-L Eco Serie Manual Del Instalador

6.6 Maintenance of ComfoFond-L Eco
battery
Inspect the ComfoFond-L Eco battery once
every 2 years.
1. Remove the front panel of the
ComfoFond-L Eco as described in the brine loop
maintenance section.
2. Check the fins in the ComfoFond-L Eco battery
for dirt and damage.
- Use a fin comb to restore the fins.
- Rinse the battery with lukewarm tap water.
Do not use aggressive cleaning agents or
solvents to clean the ComfoFond-L Eco.
3. If no further maintenance is required:
Install all parts in reverse order and switch the
power supply to the ventilation unit back on. (as
described in the maintenance section for the
brine loop).

6.7 Replacing circulation pump

1. Order the correct fluid pump service set. (Left-
hand or right-hand version)
2. Replace the fluid pump as described in the service
instructions of the service set.

6.8 Replacing expansion vessel

1. Order the expansion vessel service set.
2. Replace the expansion vessel as described in the
service instructions of the service set.
EN - 26

6.9 Replacing filling valve

1. Remove the front panel of the ComfoFond-L
Eco as described in the brine loop maintenance
section.
2. Close only ball valve V4.
3. Connect a drainage hose to filling valve V1 or V3
to drain the brine.
4. Open the selected filling valve slowly until the
system is depressurised.
5. Replace the filling valve.
The internal siphon is a fragile component. Do
not exert excessive force on the siphon.
6. Top-up the system to the nominal pressure of 1.5
bar in accordance with the filling instructions in
the brine loop maintenance section.
7. If no further maintenance is required:
Install all parts in reverse order and switch the
power supply to the ventilation unit back on (as
described in the maintenance section for the
brine loop).
6.10 Replacing boiler safety group
1. Remove the front panel of the ComfoFond-L
Eco as described in the brine loop maintenance
section.
2. Close valve V2 and ball valve V4.
3. Connect a drainage hose to filling valve V1 to
drain the brine.
4. Open filling valve V1 slowly until the system is
depressurised.
5. Replace the boiler safety group.
6. Top-up the system to the nominal pressure of 1.5
bar in accordance with the filling instructions in
the brine loop maintenance section.
7. If no further maintenance is required:
Install all parts in reverse order and switch the
power supply to the ventilation unit back on (as
described in the maintenance section for the
brine loop).