rev. 01/09/21
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MAINTENANCE
The Enviroheat heat pump water heater is designed so that there is little to do in the way of regular system maintenance.
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WARNING
Personally inspecting or servicing any part of the system is not recommended.
Shut down the machine and cut off the power before any work commences.
Maintenance operations are important to guarantee optimum performance and extend the life of the appliance.
Draining and flushing the system
EXCLAMATION-CIRCLE
CAUTION
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The system must be completely drained of water before any plumbing work is commenced. This will prevent damage to the
storage tank in the event of a vacuum or excessive pressure forming at the storage tank.
The Enviroheat heat pump hot water system should be drained and flushed every five years during a major service of the unit.
1. Turn off and isolate the power supply to the electrical element.
2. Turn off the water supply to the water heater.
3. Release excess pressure from the tank by manually opening the pressure & temperature relief valve.
4. Disconnect the cold water supply pipe connection to the tank.
5.
Fit a ½" flexible drain pipe to the cold connection at the tank. Place the open end of the drain hose in a
location where it is safe for the hot water to drain away from the tank.
6. Manually open the pressure & temperature relief valve which will allow air into the tank and the water within
the tank will flow out via the flexible drain pipe fitted to the cold inlet connection. Hold the valve open until
the tank is empty.
Relief valves
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The lever on the relief valves should be operated at least every six months. Failure to do so may result in failure of the tank.
If water does not discharge freely from the valves they should be checked and possibly replaced. The relief valves and relief
valve drain lines must not be blocked. Some water may discharge during each heating cycle.
Every five years all safety valves should be replaced to ensure the continued life and operational safety of the system. In
locations where the potable water has a Total Dissolved Solids (TDS) of greater than 600ppmn it is recommended to replace
all safety valves every three years.
Anode replacement
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The high quality vitreous enamel lined, low carbon steel tank has two sacrificial anodes for long tank life. These anodes should
be inspected every few years and replaced when they have worn out. As a minimum it is recommended that the anodes be
changed every five years.
Condensate discharge pipe
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Check the pipe regularly for cleanliness. Any obstruction may cause poor condensate flow or cause the accumulation of water
in the heat pump plastic base.
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