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Mounting the controller
Follow the procedure below to install an MC-91 temperature
controller.
1.
Determine a suitable location for the controller.
2.
Make three holes in the wall as shown.
Outline of Remote
securing screw
wiring hole
securing screw
3.
Run the cable between the controller and the Rinnai
water heater or the controller and another 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 water heater.
8.
Remove a screw on the Quick Cable Connector.
(Fig. 1)
9.
To access the cable screws rotate the Quick Cable
Connector 90° counterclockwise. (Fig. 2)
10. Loosen the clamp screw and secure wire cable with
clamp. The clamp is in the box with the temperature
controller. Make sure the length of the wire is long
enough. There should be no tension in the wire. (Fig. 3)
11. Loosen 2 cable screws on the terminals for controls and
connect the cable. You cannot connect more than 2
cables at a time. When connecting more than 2 cables,
connect them in parallel. (Fig. 4)
12. Install the Quick Cable Connection with 1 screw. (Fig. 5)
13. Insert wire cable through the Cable Access Hole so that it
can be accessed from the back. (Fig. 2)
1-21/32"
3-5/16"
V53e Manual
15
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