Rinnai REU- A1620WD-IND Operation And Installation Manual page 25

It is not recommended to install the communication cable near by house electric cables: interfearence may easily
happen causing system malfunctions. In these cases we recommend to use proper shieldied cables.
When connecting the cables to water controller or heater the polarity is not important: either colour wire can be
connected to either terminal.
The water heater end of the cables are fitted with spade terminals. Only two pairs of cables (4 spade connectors in
total) may be terminated. When attaching three or four cables it is necessary to join the cable terminals as follows:
For each pair cut off the existing spade connectors and re-terminate each pair into a new spade connector
connectors are available from your local electrical component retailer) so that there are only two sets of spade
connectors (4 spade connectors in total) to be terminated.
Single cables can be used
when terminating up to two
communication cables.
Connecting One or Two Communication Cables
Follow steps 1 through 5 of "Communication Cable(s) & 'Ezi connect'" 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.
When
Terminating
Three Cables
Follow steps 1 through 5 of "Communication Cable(s) & 'Ezi connect'" to terminate the joined cable pairs to the water
heater.
Communication Cable(S) & 'Ezi connect'
Do not attempt to connect cables to the 'Ezi connect' cable connector at the water heater
unless the electric power to the water heater is switched 'off' otherwise damage to electrical
CAUTION
components may occur.
1. Isolate the electric power supply by switching the power point off
and removing the power plug of the water heater from the electric
power socket.
2. Remove the retaining screw
at the base of the appliance.
3. Swing the 'Ezi connect' cable connector door open and thread the
cable through the weather seal of the cable access hole
direction shown allowing sufficient cable length so that the sheath
of the cable can be secured with cable clamp
4. Loosen screw terminals
connectors to these terminals and re-tighten.
Polarity is not important, either wire colour can be connected to
either terminal.
5. Return the 'Ezi connect' cable connector to the original position
taking care not to damage cable wires in the process and replace
the retaining screw
of the 'Ezi connect' cable connector
A
& and connect the cable spade
D E
.
A
Paired cables are to be used
when terminating three or
four communication cables.
When
Terminating
Four Cables
A
in the
B
.
C
A
A
A
D
C
(spade
A
A
B
E
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