SAFETY, WARNINGS, INSTALLATION NOTES
11
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The power supply wires are to be directly connected to the terminal block
and earth tab connection, with no excess wire loops inside the front cover.
The temperature rating of the power supply wires insulation must suit this
application, or the wiring protected by insulating sleeving with an
appropriate temperature rating if it can make contact with the internal
storage cylinder. The temperature of the internal storage cylinder can
reach 70°C under normal operation.
•
in compliance with all local codes and regulatory authority requirements,
Installation and commissioning requirements and details for the installing
plumber and licensed electrical worker are contained on
Mains pressure water supply
The water heater is designed to operate at mains pressure by connecting directly
to the mains water supply.
The water heater is supplied with a temperature pressure relief valve. If an
expansion control valve has been installed on the cold water line to the water
heater, this should have a pressure rating as shown in the table below.
If the mains water supply pressure in your area exceeds that shown, an approved
pressure limiting valve is required.
Models
971160
9W1160, &
250, 315, 400
Temperature pressure relief valve setting
1400 kPa
1000 kPa
Expansion control valve setting*
1200 kPa
850 kPa
Maximum mains supply pressure
With expansion control valve
960 kPa
680 kPa
Without expansion control valve
1120 kPa
800 kPa
The supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved.
