Maintenance; General Instructions; Maintenance Instructions; Topping Up The Installation With Water - DeDietrich AWHP-2 MIV-3 User Manual

7 Maintenance

7 Maintenance
7.1

General instructions

7.2

Maintenance instructions

Fig.24 Beware of water leaks
AD-0001507-A
7.3

Topping up the installation with water

7.4

Venting the heating system

28 AWHP-2 MIV-3
Maintenance operations are important for the following reasons:
To guarantee optimum performance.
To extend the life of the equipment.
To provide an installation which offers the customer optimum comfort
over time.
Caution
An annual service of the heat pump is mandatory.
1. Check the hydraulic pressure in the installation.
Note
If the water pressure is lower than 1 bar, more water should be
added. If necessary, top up the water level in the heating system
(recommended hydraulic pressure between 1.5 and 2.0 bar, or be­
tween 0.15 and 0.2 MPa)..
2. Carry out a visual check for any water leaks.
3. Open and close the radiator valves several times a year.
This helps to prevent the valves from seizing up.
4. Clean the outside of the heat pump using a damp cloth and a mild
detergent.
Caution
Only qualified professionals are permitted to clean the inside of
the heat pump.
If necessary, top up the water level in the heating system (recommended
hydraulic pressure between 1.5 and 2 bar, or between 0.15 and 0.2 MPa).
1. Open the valves on all radiators connected to the heating system.
2. Set the room thermostat to as low a temperature as possible.
3. Put the heat pump in shut-down/frost protection mode.
4. Open the fill valve.
5. Close the fill valve when the pressure gauge shows a pressure of
1.5 bar (0.15 MPa).
6. Put the heat pump in heating mode.
7. When the pump has stopped, vent again and top up the water pres­
sure.
Note
Filling and venting the installation twice a year should be sufficient
to obtain an adequate hydraulic pressure. If it is often necessary
to top up the installation with water, contact your installer.
It is essential that you vent any air in the domestic hot water tank, the
pipes and the taps to prevent the annoying noises likely to be produced
during heating or when drawing off water.

7.4.1 Manual venting

1. Open the valves on all radiators connected to the heating system.
2. Put the heat pump in shut-down/frost protection mode.
7611973 - v04 - 07032016