Unical ENERPUMP DHW 110, Installation And Service Manual

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Luxury Air Source Heat Pump-Monobloc System 40
MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and
the field wiring have to be carried out at regular intervals.
BEFORE CARRYING OUT ANY MAINTENANCE OR REPAIR ACTIVITY, ALWAYS SWITCH ‘OFF’ THE
CIRCUIT BREAKER ON THE SUPPLY PANEL, REMOVE THE FUSES OR OPEN THE PROTECTION
DEVICES OF THE UNIT.
MAKE SURE THAT BEFORE STARTING ANY MAINTENANCE OR REPAIR ACTIVITIES THE POWER
SUPPLY TO THE OUTDOOR UNIT IS SWITCHED ‘OFF’.
The described checks must be executed at least once a year.
1. Water pressure
Check if the water pressure is above 0.3 bar. If necessary add water.
2. Water filter
Clean the water filter.
3. Water pressure relief valve
Check for correct operation of the pressure relief valve by turning the red knob on the valve
counter-clockwise:
•
If you do not hear a clacking sound, contact your local dealer.
•
In case the water keeps running out of the unit, close both the water inlet and outlet shut-off
valves first and then contact your local dealer.
4. Pressure relief valve hose
Check that the pressure relief valve hose is positioned appropriately to drain the water.
5. Backup heater vessel insulation cover
Check that the back-up heater insulation cover is fastened tightly around the back-up heater
vessel.
6. Domestic hot water tank pressure relief valve (field supply)
Applies only to installations with a domestic hot water tank.
Check for a correct operation of the pressure relief valve on the domestic hot water tank.
7. Domestic hot water tank booster heater
Applies only to installations with a domestic hot water tank.
It is advisable to remove lime build up on the booster heater to extend its life span, especially in
regions with hard water. To do so, drain the domestic hot water tank, remove the booster heater
from the domestic hot water tank and immerse in a bucket (or similar) with lime-removing product
for 24 hours.
8. Indoor unit switch box
•
Carry out a thorough visual inspection of the switch box and look for obvious defects such as
loose connections or defective wiring.
•
Check for a correct operation of contactors (with the use of an ohmmeter). All contacts of these
contactors must be in open position.