joule HHH-AEHP-00001, Installation & Maintenance Manual

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The external temperature control for the Modul-AIR unit is achieved through the use of wall mounted
Opentherm room thermostat. Always use the OT thermostat models supplied by Joule to ensure correct
operation of the Modul-AIR system.
The OT Thermostat is typically installed in the living area (zone 1) where it also acts as the temperature sensor
for that zone. The recommended location for the OT Thermostat is at eye level, 1.5m off the floor and kept
away from sources of heat and/or cooling like radiators, drafts or direct sunlight. Local regulations should
be adhered to when planning the location of any room sensor.
Room thermostats/sensors need a free flow of air to operate correctly, so they must not be covered by
curtains or blocked by furniture. Nearby electric fires, televisions, walls or table lamps may also prevent the
sensor from sensing the correct temperature. Read instructions supplied with your OT Thermostat fully so
you get the best from the product.
OT Thermostat
In order to power the stat and for it to communicate to the Modul-
AIR unit the OT Thermostat requires a 2 Core, 0.5mm2 cable. The
OT Thermostat cable is connected from T & T on the thermostat to
P12 connector block on the Modul-AIR PCB on ports 3 & 4. There
are no polarity restrictions on this connection. This cable is to be
fed into the Modul-AIR unit using the entry grommets previously
described.
4
3
P12
1.2-1.5m