Mounting The Controller (V53I) - Rinnai TANKLESS WATER HEATER V53E Operation And Installation Manual

Temperature Controller Installation (V53i)
Mounting the Controller
Follow the procedure below to install the MC-91
or MCC-91 temperature controller.
1. Determine a suitable location for the
controller.
2. Make three holes in the wall as shown.
3. Run the cable between the controller and the
Rinnai water heater or the controller and the
other controller.
4. Remove the face plate from the temperature
controller using a screwdriver.
5. Connect the cable to the temperature
controller.
6. Mount the controller to the wall using the
holes drilled in step 2.
7. Disconnect the power from the Rinnai water
heater.
8. Remove the cover of the Rinnai water heater.
9. Remove the plastic cover from the PCB and
electrical connections.
10. Thread the cable through the access hole at
the base of the unit and connect the wires to
the controller terminals on the right hand side
bottom of the PCB.
11. Secure the controller cable using the clamp
provided.
12. Replace plastic cover over PCB and then
replace the cover of the Rinnai water heater.
36
securing screw
securing screw
V53i & V53e Operation and Installation Manual
WARNING
Do not attempt to connect the temperature controllers
with the power on. There is 120 volt potential, next to
the temperature controller connections inside the unit.
Do not connect the temperature controller to the
120VAC terminals provided for the optional
solenoid drain valves.
All service and wiring should be performed by a
registered installer.
Temperature Controller
wiring hole
1-21/32"
3-5/16"