Inspecting Brine Loop; Maintenance Of Comfofond-L Eco Casing - Zehnder ComfoFond-L Eco 350 L Manuel De L'installateur

6.3 Inspecting brine loop

Inspect the brine loop at least once a year.
Check the system pressure on the pressure
meter. Top-up the system if required.
The brine loop pressure must be between 0.5 and
2.5 bar for the system to operate well. The ideal
pressure is 1.5 bar.
Filling instructions:
Top-up the system as follows:
1. Disconnect the ventilation unit from its power
supply.
2. Remove the filter handle from the ComfoFond-L
Eco.
3. Release the front panel by removing the 6 screws.
4. Remove the front panel from the ComfoFond-L
Eco.
5. Connect a filling hose to filling valve V3.
6. Open filling valve V3.
7. Measure the glycol percentage using a
glycol meter.
- Fill the system with a ready-made brine mixture
first if required. The filling
instructions for this are given in the
'Filling the brine loop' section.
The glycol percentage deviation from the
selected percentage during installation may not
exceed -3%. The desired glycol percentage must
be restored immediately after topping-up the
system twice with water.
8. Increase the pressure in the device to 1.5 bar. To
that end, use the filling hose connected to filling
valve V3. Use an additional pressure pump if
necessary.
9. Closing filling valve V3 and disconnect the filling
hose.
10. If no further maintenance is required:
Install all parts in reverse order. (from point 4
back to point 1)
6.4 Cleaning internal siphon
Inspect the ComfoFond-L Eco internal siphon at
least once a year.
1. Remove the front panel of the
ComfoFond-L Eco as described in the brine loop
maintenance section.
2. Perform the following checks of the
ComfoFond-L Eco internal siphon:
Check whether the drain is still open by adding
extra water to the siphon;
Visually inspect the siphon for
contamination.
3. Resolve any established problems.
The internal siphon is a fragile component. Do
not exert excessive force on the siphon.
4. If no further maintenance is required:
Install all parts in reverse order (as
described in the maintenance section for the
brine loop) and switch the power supply to the
ventilation unit back on.
6.5 Maintenance of ComfoFond-L Eco
casing
Inspect the ComfoFond-L Eco casing at least
once a year.
1. Remove the front panel of the
ComfoFond-L Eco as described in the brine loop
maintenance section.
2. Perform the following checks:
Check the seals for damage;
Check the inside and outside for dirt and
damage;
Check the duct connections for dirt and
damage.
Any signs of corrosion and other damage must
be treated directly and appropriately.
To clean the whole ventilation system, we
recommend hiring a specialized cleaning firm.
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)
25 - EN