Mounting The Controller - A.O. Smith 705 Operation & Installation Manual

Direct vent tankless water heater
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Remote Controller Installation

Mounting the Controller

Follow the procedure below to install additional
controllers.
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
water heater or the controller and the other
controller.
4. Remove the face plate from the remote
controller using a screwdriver.
5. Connect the cable to the remote controller.
6. Mount the controller to the wall using the
holes drilled in step 2.
7. Disconnect the power from the water heater.
8. Remove the cover of the 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 water heater.
32
WARNING
Do not attempt to connect the remote controllers with
the power on. There is 120 volt potential, next to the
remote controller connections inside the unit.
Do not connect the remote controller to the
120VAC terminals provided for the optional
solenoid drain valves.
All service and wiring should be performed by a
registered installer.
securing screw
wiring hole
securing screw
REMOTE
CONTROL CABLE
305, 505, 705 Indoor Manual
Outline of Remote
REMOTE CONTROL
CONNECTION TERMINALS
CABLE CLAMP
1-21/32"
3-5/16"

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