Maintenance - Mitsubishi Electric PUHZ-W50VHA2 5kW Mono Installation And Maintenance Manual

Maintenance

Maintenance of Ecodan Systems
The Ecodan heat pump should be maintained at least once a year to comply with warranty and RHI. You must log your
maintenance here for the 3-year guarantee
Stop the unit, shut the 2 red isolating valves, remove the lid of the TF1 you need the TF1 spanner for this. Clean the
magnet and the filter. Open the valves and start the unit again. Every 3 years you need to disconnect the hoses at the
back of the heat pump and flush the heat exchanger back and forward a couple of times to remove any debris from
the coil.
On Monoblocs test the concentration of the Anti-freeze (glycol) in
the system using a Glycol tester the level should be 25%. If you don't
have a glycol tester a glycol tester / refractometer can be bought
from your heat pump supplier or online. Refill the unit, pressure
should be 1.5 bar,
We need to test the operation of the unit against the hot water
cylinder. So first we need to draw off 50 litres of water, run a
couple of taps for 5 mins to achieve this. The unit should start up
automatically in hot water mode, if it doesn't on front screen scroll
left highlight Heating press power to turn this off.
Press power button to switch on the unit, press f4 button, this screen
will appear, press F1 , the unit is now in hot water NOW mode.
To test cylinder and flow temp press menu, operational information
ok, select DHW ok all temperatures are listed.
Log the temperature of the flow, the flow rate, the temperature
of the air as it enters the coil and the temperature of the air in the
garden.
The heat pump should be able to achieve 50C cylinder temperature without using the immersion heater. While
running, check the outdoor unit for damage & debris, the coil needs washing, we recommend you use an approved
heat pump cleaning chemical, your distributor will stock this. Instructions are given on the bottle. You also need to
clean and polish the outside casing we recommend car wax or ACF50 to do this.
02380 274 833 | sales@freedomhp.co.uk
Installation Manual.indd 7
Air vent
Magnet
Filter body cap
Filter body
Drain valve
(Do not remove)
Cap and key
Isolating valves
( 2 off )
Inlet / outlet port
Isolating valve
Sealing washers
( 2 off )
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