Maintenance Requirements - Sanden EcoPlus GAUS-300FQS Owner's Manual

MINOR MAINTENANCE
It is recommended minor maintenance be performed every six (6) months. It can be carried out by the
dwelling occupant. The minor maintenance includes:
• Temperature & Pressure Relief Valve (TPR); operate valve to open and flush water through
• Expansion Control Valve (ECV); operate valve to open and flush water through
To ensure the water heater is functioning correctly and safely the function of the relief valves, TPR and
ECV, must be checked periodically. Refer to the section below RELIEF VALVES for the correct
procedure to operate the valves.
• For efficient operation the Heat Pump Unit must have unobstructed air flow. Ensure Heat Pump
unit is kept clear of any plant growth or other debris such as; weeds, leaves, sand, dirt, and dust build
up. Prevent insect or animal intrusion such as cobwebs and nests.
• In coastal areas subject to salt spray the Heat Pump Unit should be rinsed off regularly with low
pressure cold water to remove salt build up which will cause corrosion on metal surfaces. Detergents
solvents or other or other cleaning products should not be used.
Failure to do this will void the warranty.
MAJOR SERVICE
It is recommended a major service be conducted on the water heater every five (5) years.
Warning: Installing and servicing the water heater system must be carried out by an EcoPlus
authorized installer. Please contact the Rheem Service team for a list of your local technicians.
Note: The major service and routine replacement of any components, such as the relief valve(s), are
not included in the Rheem warranty. A charge will be made for this work. Only genuine replacement
parts should be used on this water heater.
The major service includes:
• Replace the Temperature and Pressure Relief Valve
• Inspect and flush the Expansion Control Valve. If required, replace the valve
• Check and clean the heat pump module of dust and residue
• Check and inspect the heat pump module for operation
• Visually check the unit for any potential problems
• Inspect all connections.
• Check the condensate drain.
Note: The water heater may need to be drained during this service. After the completion of the service,
the water heater will take some time to reheat the water. Depending upon the power supply connection,
hot water may not be available until the next day.
HEAT PUMP SYSTEM
It is recommended the evaporator and refrigeration system is checked every five years. In particularly
dusty environments, it may be necessary to have the heat pump system checked and cleaned of dust
and residue on a more regular basis.
RELIEF VALVES
The water heater is fitted with a number of valves to ensure correct and safe operation, refer to Figure 2
on page 8 showing a schematic of the installation. There are two safety valves fitted to the water heater,
the Temperature and Pressure relief valve and the Expansion Control Valve. To ensure ongoing safe
operation of the water heater it is important to manually operate the TPR and ECV valves periodically.
Doing so confirms the valves will open and that waterways are not blocked. To flush the valves slowly
operate the valve lifting mechanism, lift the lever or turn the knob as indicated on the valve until water is
seen to flow from the drain. The lifting mechanism can then be returned to it's initial position slowly.

Maintenance Requirements

Sanden Heat Pump – Owner's Manual
Page 17 of 20
Sanden Heat Pump – Owner's Manual
Page 17 of 20