Rheem Gas Heavy Duty Water Heater Models 265 Litre and 275 Litre - Manual (Page 30)

CONNECTIONS – ELECTRICAL
30
POWER FLUE EXTERNAL CONTROLS – INTERMITTENT OPERATION
INTERLOCK TERMINAL
621 SERIES RHEEM
multiple water heater installation
Notes
1. Power source for the water heater, fan and
control circuit must be from the same circuit.
2. R1 monitors return signal.
3. R2 monitors alarm signal.
4. T1 to be set for 20-30 seconds.
5. Meets requirements of Clause H.2.2.6 of
AS5601 – 2004, providing lockout in the event of
flue product flow failure.
6. Where intermittent fan operation is utilised, it is
necessary to run the fan for some time after
combustion ceases to prevent flue spillage of
combustion products. T2 to be set for 5 minutes.
jumper lead must be removed
for connection to a power flue
For a single water heater
installation, connect 1 and 2
directly to the water heater
2 1
2 2 2 1 1 1