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EF26 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.
Connecting communication cables to the mini-plug
DO NOT attempt to connect water controller cables to the mini-plug when it is plugged
into the PCB unless the power to the water heater is switched OFF, otherwise damage to
CAUTION
electrical components may occur.
Water controllers are connected to the PCB by a dedicated pre-wired mini-plug.
Standard electrical cable
connectors can be used
to terminate the water
controller wires to those on
the mini-plug. The existing
spade connectors, of the
communication cables, will
need to be removed prior to
termination. Controllers are
not polarity sensitive, however to avoid confusion it is recommended that like coloured wires be
terminated together.
Connecting communication cables to the
PCB
(refer image below)
DO NOT attempt to connect the mini-plug or
water controller cables to the water heater
unless the power to the water heater is
switched OFF, otherwise damage to electrical
components may occur.
1. Isolate the power supply by switching the
power point off and removing the water
heater plug from the power socket.
2. Remove the appliance front cover.
3. Insert the mini-plug and the connected
water controller cables through the cable
access at the base of the appliance. Ensure
the cable connectors are located inside the
appliance for protection.
4. Locate the PCB (bottom right of the
appliance), and carefully move the plastic
safety cover out of the way.
5. Locate the accessory port socket (bottom
front of PCB).
6. Plug the mini-plug into the accessory port
socket, the plug and socket are keyed
so that they can only be plugged in one
direction.
Electrical connectors
(supplied with water controllers )
Pre-wired mini-plug
(supplied)
7. Proceed with the water controller
installation and connect the communication
cables to the controllers.
Safety
cover
Rinnai INFINITY Deluxe controller OIM 01-20 | 17
Communications cable
MC-91, MC-601, BC-100V
Communications cable
MC-100V, wireless controller
Cable access
PCB
Accessory port socket
Accessory
port socket
connection
PCB
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