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10.1 SP AND BX5 SERIES THERMOSTAT POSITIONING GUIDELINES
A thermostat is positioned inside the house and wired to the control module in the heater unit. The thermostat
monitors the temperature in the house and switches the system on and off in order to maintain a set temperature,
therefore, the thermostat must be installed in the correct position.
Various thermostats are available for controlling the heating systems; these are explained below.
It is important that the thermostat is placed in a position that will provide the most accurate reading of the temperature,
for example, in the area most often used for family living.
Note:
• Do not install the wiring with the power turned on, as the fuse may blow, which would not be covered under warranty.
• Use only thermostats of the same brand as the heater unit, as any failure relating to a non-matching thermostat will not be covered
under warranty.
Internal Wall
The temperature difference on an external wall can also affect the thermostat accuracy, so the thermostat should
always be mounted on an internal wall. Keep the hole in the wall for the wiring as small as possible to prevent
draughts from within the wall cavity affecting the temperature.
Height
The thermostat should be positioned approximately 1500mm above floor level.
Avoid Hot Spots
Keep the thermostat away from warm air outlets, such as radiation from the sun, fireplaces, radio and television sets,
and nearby warm pipes and ducts.
Avoid Cold Spots
Keep the thermostat away from draughts, such as from doorways, stairwells, windows and return air inlets.
Avoid Dead Spots
Keep the thermostat away from areas of less than normal air circulation, such as behind doors, in alcoves or in
corners.
Interference From Other Electrical Connections
Ensure the thermostat and control wiring are kept away from other electrical components, including electrical wiring,
data and antenna cables, and also the spark igniter loom within the heater cabinet.
Use the right cable
Ensure the cable is 0.75mm
10.2 PROGRAMMABLE AND MANUAL THERMOSTAT INSTALLATION
Programmable and manual thermostats can be connected directly to SP and BX5 series heaters.
10.2.1 Connect a Programmable Thermostat
a. Run the wiring from the heater to the thermostat.
b. Remove the backing plate from the thermostat.
c. Draw the wires out from the wall cavity through the centre opening of the backing plate.
d. Mount the backing plate on the wall (before connecting the wires).
e. Connect heater terminals R and W to the respective R and W terminals on the thermostat (refer to Diagram 22
for an SP Series heater or Diagram 23 for BX5).
f. Fan only operation: Connect heater terminal G to terminal G on the thermostat.
g. Insert the batteries correctly and mount the thermostat onto the backing plate.
h. Refer to the installation guide and operating manual supplied with the programmable thermostat.
Rinnai
10. THERMOSTAT INSTALLATION
in cross-section and less than 100m in length.
2
35
Ducted Gas Heater IM
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