
18
Installation Manual
Drain processing
• Expansion water may drop from the pressure relief valve and wet the fl oor.
Hot water piping
• Do not use lead, PVC, iron or any piping which has been treated with chromates, boiler seal or other
chemicals.
• Keep the pipe lengths to a minimum, and make sure that the pipework is well insulated as correct
performance of the appliance is dependent on properly insulated pipework.
• DO NOT FIT ANY VALVES OR RESTRICTORS TO THE OUTLET OF THE WATER HEATER.
• DO NOT FIT ANY OBSTRUCTION TO THE PRESSURE RELIEF LOCATED ON THE HOT WATER OUTLET
CONNECTION.
• Use mixing valves with low water resistance. Use shower heads with low pressure loss.
• If necessary, use a pump or other means to ensure that the supply water pressure to the inlet of the heater
does not fall below 199kPa when the maximum amount of water is being demanded. If the water pressure
drops below 200 kPa, local boiling can occur inside the water heater causing abnormal sounds and
decreasing the durability of the heat exchanger.
After purging the air from the system using the hot water supply taps, remove the water inlet strainer located
on the cold water supply inlet connection. Remove any debris from the fi lter and replace. When replacing the
fi lter, do not over-tighten the “O” ring seal.
No pressure reduction is required unless the water pressure exceeds 1000kPa.
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