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Installation Information - Filling
Important
•
Do not plug in the water heater until the cylinder is completely full of water
•
Please read these instructions carefully as failure to follow this procedure will
void any warranty
•
Thermostat is factory set and should not be reset
1.
Flush cold water inlet pipe to remove any debris before final connection to cold water inlet
on cylinder.
.
Turn on hot water tap at kitchen sink or similar to allow air to be expelled while cylinder is
filling with cold water.
3.
Slowly open cold water isolation valve on cold water supply pipe.
4.
Allow cylinder to fill. Turn off hot water tap once non-aerated water flows through hot water
tap.
5.
Check all connections for water leakage, tighten as required.
6.
Prime circulating pump on start up, refer page 15 for extract from Grundfos Instructions on
how to do this.
7.
The thermostat on the cylinder is set to 65 °C and the Rinnai continuous flow water heater
is set to 75 °C. If the cylinder thermostat does not appear to be set correctly, refer to
procedure on next page.
If hotter water is required both the cylinder thermostat and Rinnai continuous flow water
heater, dip switches must be adjusted. Ensure Rinnai continuous flow water heater is set at
least 10 °C hotter than the cylinder thermostat cut out temperature.
8.
Plug 3 core flex into suitably earthed general purpose socket outlet. Turn on power supply.
Pump should start and the Rinnai continuous flow water heater should ignite.
9.
Loosen bleed screw on pump. The Rinnai continuous flow water heater will continue
to operate until the thermostat is satisfied water temperature is up to 65 °C. When
temperature has been reached thermostat will turn off the primary circulating pump.
Installation Information - Draining
1.
Isolate power supply to the Demand Duo system.
.
Close cold water isolation valve.
3.
Open hot water tap to relieve pressure.
4.
Remove cap on cold water drain valve if no drain line fitted.
5.
Connect hose or similar to allow water to drain to a safe location.
6.
Open cold water drain valve and allow water to drain from system.
Rinnai New Zealand
Demand Duo Lite Operation/Installation: 11451-A
13
01-09
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