A-Series CFWH installation guide 01-18
|
15
Appendix 1:
Water controller communication cables
Wired water controllers operate at an extra low voltage (12 V DC) which is supplied from the
water heater, a 10 m long communication cable is supplied for connection to the water heater.
Only Rinnai supplied communication cables may be used.
The water heater end of the cables is fitted with spade terminals. Only two pairs of cables
(four spade connectors in total) may be terminated. When attaching three or four cables it is
necessary to join the cable terminators as shown below.
For each pair cut off the existing spade connectors and re-terminate each pair into a new spade
connector (A). Spade connectors are available from your local electrical component retailer
A
Single cables can be used
when terminating up to two
communication cables.
Paired cables are to be used
when terminating three or
four communication cables.
Connecting one or two communication cables
Follow steps one through five below to terminate the cables to the water heater.
Connecting three or four communication cables
To connect three or four cables, separate all the cables to be fitted into pairs.
A
A
A
When
terminating
three cables
When
terminating
four cables
Follow steps one through five below to terminate the joined cable pairs to the water heater.
1. Isolate the power supply by switching the power
point off and removing the power plug of the water
heater from the electric power socket.
2. Removing the retaining screw of the cable connector
at the base of the unit.
3. Swing the cable connector door open and thread the
cable through the weather seal of the cable access
hole, allowing sufficient cable length so that the
sheath of the cable can be secured with the cable
clamp supplied with the transceiver.
4. Loosen the screw terminals and connect the cable
spade connectors to these terminals and re-tighten.
Polarity is not important, either wire colour can be
connected to either terminal.
5. Return the cable connector to the original position,
taking care not to damage the cable wires in the
process, and replace the retaining screw.
Retaining
screw
Cable access
Cable clamp
