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Customer Information - Introduction
This manual has been written to:
•
Help you understand how your Demand Duo Lite operates
•
Identify what you need to do to maintain your Demand Duo Lite system
•
Assist in troubleshooting in the unlikely event a problem occurs
Some facts about your Demand Duo Lite system
The thermostat senses the temperature of the water in the tank, and when
How it works
it drops below the set point, the primary pump is activated. This flow starts
the Rinnai continuous flow water heater which returns heated water to the
tank.
For safe operation the tank component of your system is fitted with a:
Safety devices
•
•
It is important that you do not tamper with or remove these devices. In the
case of the TPR valve, do not block or seal the valve or drain pipe.
Anode
The tank is fitted with a sacrificial anode designed to extend the life of the
tank. It will slowly dissipate protecting the cylinder and should be changed
every 5 years (more frequently in hard/aggressive water areas).
Space should left above the cylinder to allow anode replacement.
Reset timer
your system is equipped with a reset timer to ensure the pump does not
run continuously. This may occur if for some reason the Rinnai continuous
flow water heater does not ignite.
The timer will shut off the pump every 15 minutes for a few seconds to
ensure the continuous flow water heater resets itself.
Rinnai New Zealand
Temperature Pressure and Relief (TPR) Valve that ensures the water
remains at a safe pressure and temperature
Automatic tank thermostat to maintain water temperature, do not
adjust the thermostat which is set to 65 °C
Demand Duo Lite Operation/Installation: 11451-A
6
01-09
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