Regular Care - Rheem HPHD-135HNU-483 Owner's Manual And Installation Instructions

REGULAR CARE

It is suggested that the commercial heat pump be serviced annually, to retain optimum performance. Servicing must be
performed by a suitably qualified person.
ANNUAL SERVICE
1. Check the sensors are fully installed into thermal
wells.
2. Check for leaks at all fittings.
3. Check for signs of excessive corrosion on storage
tank(s) jacket(s) and heat pump casing.
4. Check for sludge build up and if necessary drain and
flush storage tank(s).
5. Clear hot water pump impeller and ensure free rota-
tion.
6. Check condensate drain for blockages – clear if nec-
essary.
7. Clean blockages and debris from evaporator fins, fan
blades and grilles.
8. Isolate power to heat pump and check all electrical
connections for signs of overheating due to poor con-
nection.
9. Check for vibration or excessive noise from compres-
sor, fans and hot water pump.
10. Check refrigerant pressures and adjust refrigerant
charge if required.
11. Visually check system for any potential problems.
12. Confirm correct system operation.
13. Operate temperature and pressure relief valve and
expansion control valve. Refer to next page.
9
Commercial Air to Water Heat Pump Water Heater
FIVE YEAR SERVICE
1. As per annual service.
2. Inspect and if required, replace storage tank(s)
anode(s). If the anode is not replaced, it should be
replaced within three years of this service.
3. Check operation of defrost solenoid valve by manu-
ally operating the valve.
4. Replace temperature and pressure relief valve or ex-
pansion control valve.
Refer to Service manual for more information.