Installation guide
12 | Rinnai Continuous Flow Water Heating Specication Guide 02-13
Fault indication
In multiple unit installations it is important to know if a water heater is faulting. If a water heater is faulting this
increases the wear and tear on the water heaters and will cause progressive reduction in the hot water supply if
more units fail.
Rinnai HD/EF water heaters can be fitted with a Rinnai HD Error Indication Switch (part R1070), volt free contact,
which will close to indicate a water heater is not operating. This can be connected to a building management or
other system to give a signal to call a service person.
Maintenance
Rinnai recommends annual maintenance. Maintenance can be easily accomplished as individual water
heaters can be isolated from the system without significantly affecting the hot water supply.
Standard system setup in a central water heating system
Checklist
Rinnai HD/EF models installed
Rinnai water heaters are set to 75 °C
Tank thermostat OFF and set to no more than 65 °C
'Y' strainer in front of circulating pump—do not rely on strainers in Rinnai water heaters
Isolating valves fitted to hot and cold connections on each Rinnai water heater (allows water heaters to be
individually isolated for routine maintenance)
Flow and return manifolds to Rinnai water heaters balanced—starting from the cylinder. The total length of
pipe to a water heater and back to the cylinder should be the same for each water heater.
Electronic manifolding is not installed on Rinnai water heaters
Timer fitted to pump power circuit (e.g. 15 minutes ON, 30 seconds OFF)
Set point
= 75 deg.
Set point
= 75 deg.
Set point
= 75 deg.
Set point
= 75 deg.
Thermostat
On 60 ºC
Off 65 ºC