Rinnai REU-VRM1120WD-E Installation And User Manual page 28

Universal Temperature Controller - MC-91
1. Determine the most suitable position for the temperature controller.
2. Drill 3 holes in the wall (Fig.1), one for the cable and two for the securing screws. Fit wall plugs if
needed and ensure controller is level.
3. Run the cable provided through the hole in the wall ensuring that the end fitted with the connector
is nearest the controller (Fig.2).
4. Remove the face plate from the controller using a flat screwdriver (Fig.3). Take care not to damage
the cover.
5. Connect the cable to the temperature controller.
6. Fix the controller to the wall and fasten with the Phillips head screws supplied as shown in (Fig.4).
7. Remove the protective plastic film from the controller face.
8. Replace the face plate.
Connecting One or Two Controllers
1. Isolate the electric power supply.
2. Remove the retaining screw of the quick cable connector door located
at the base of the appliance (A) (Fig.5).
3. Thread the water controller cable through the weather seal of the
cable access hole (B) (Fig.6) in the direction shown allowing sufficient
cable length so that the sheath of the cable can be secured with cable
clamp (C) supplied with the water controllers (Fig.7).
4. Loosen the screws on terminals (D) and (E). Connect the spade
connectors of the controller cables to these terminals. Tighten the
screws on terminals (D) and (E). Polarity is not important, either wire
colour can be connected to either terminal (Fig.8).
5. Return the quick cable connector door to the original position taking
care not to damage controller wires and replace the retaining screw.
Connecting Three Controllers
Repeat steps 1, 2 and 3 above.
Cut the spade connectors from two of the controller cables to be
connected to the appliance (4 spade connectors should be cut off) and
discard. Connect the wires from these two cables and terminate into
two new spade connectors as shown in Fig.9. Spade connectors are
supplied with the controllers.
Repeat steps 4 and 5 above.
Connecting Four Controllers
Repeat steps 1, 2 and 3 above.
Cut the spade connectors from all four of the controller cables to be
connected to the appliance (8 spade connectors should be cut off) and
discard. Connect the wires of two cables and terminate into two new
spade connectors as shown in Fig.9. Repeat this for the remaining two
cables. Spade connectors are available from your local electrical
component retailer.
Repeat steps 4 and 5 above.
TEMPERATURE CONTROLS
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Fig.5
Fig.6
Fig.7
Fig.8
Fig.9