Installation guide
Rinnai Continuous Flow Water Heating Specication Guide 02-13 | 5
What is continuous ow?
It is exactly that—a continuous flow hot water system. Unlike storage tanks that can run
out, continuous flow units deliver a pre-determined flow rate every minute for as long as
the unit is running.
General principle of operation
Each Rinnai continuous flow water heater has a number of components that
control the accuracy of the water temperature and the water flow:
- PCB (the on-board computer)
- water control valve
- water flow sensor
- modulating gas valve
- outlet water temperature sensor
The unit senses the need to start when the water begins to flow through the
appliance (when a tap is turned on). The combustion fan starts, ignition begins
(electronic requiring electricity), and the gas valve opens. Once the flame is
established the appliance will heat the water as required until the tap is turned
off.
The difference between Rinnai Infinity VT/HD and Rinnai EF
A Rinnai EF uses two heat exchangers to create continuous hot water
on demand, the Rinnai Infinity VT/HD has only one.
How the Rinnai EF operates:
1. Water travels to the secondary latent heat exchanger first.
2. Combustion gases condense outside the latent heat exchanger
and heat is transferred to the cold water. The water temperature
increases by approximately 5 °C.
3. Water flows to the primary heat exchanger.
P
C
B
C
C
Gas
H