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| Demand Rapid owner & installer guide 12949-B 02-19
About the Demand Rapid system
The thermostat senses the temperature of the water in the cylinder, and
when it drops below the set point the pump is activated. This flow starts the
Rinnai INFINITY continuous flow water heater, which returns the heated
water to the cylinder.
Reset timer
The system is equipped with a reset timer to ensure the pump does not run
continuously. This may occur if the Rinnai INFINITY does not ignite. The
timer will shut off the pump every 30 minutes for a few seconds to ensure
the Rinnai INFINITY resets itself.
Safety devices
For safe operation the cylinder component of the system is fitted with:
• Temperature Pressure and Relief (TPR) valve(s), to ensure the water
stays at a safe pressure and temperature.
• Thermostat to maintain the water temperature.
It is important that you do not tamper with or remove these devices. In the
case of the TPR valve(s), do not block or seal the valve(s) or drain pipe(s).
The system must not be operated unless these devices are fitted and are in
good working order.
Rinnai INFINITY safety devices; flame failure, boil-dry protection, overheat protection, fusible link,
pressure relief valve and combustion fan rpm check.
Cylinder thermostat setting
To meet the New Zealand Building code requirement
1
to disinfect water for legionella bacteria
2
, the
cylinder thermostat has been set to 65 °
C.
1 Clause G12.3.9, Acceptable Solution G12/AS1 6.14.3
2 Legionella is a bacterium that can cause Legionnaires’ disease—a severe form of pneumonia
General safety
Power cords
Power leads from the system MUST BE plugged into a weatherproof electrical outlet. If
the power supply cord of the system is damaged it must be replaced by an authorised
person in order to avoid a hazard, using genuine replacement parts from Rinnai. Take
care not to touch power cords with wet hands.
Rinnai INFINITY external flue outlet
• Do not touch or insert objects into the flue outlet
• Keep flammable materials, spray cans, fuel containers, pool chemicals well clear of the system
and flue outlet
