Intergas Heating Ltd
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8.3.2
Programmable On / off room thermostat (low voltage)
To be connected to contacts 6 and 7 of connector X4.
This is a 24 volt connection and no mains power must be applied to these terminals.
See chapter 13, electrical diagram.
Note
5.
The on/off room thermostat has to be connected to the contacts 6 and 7 of connector X4.
6.
Adjust the feedback resistance of the room thermostat to 0.1 A. In case of doubt measure
the current and adjust this accordingly.
7.
The allowed maximum electrical resistance of the room thermostat and wiring is 15 Ohm.
8.3.3
Programmable Open Therm room thermostat
Open therm is a protocol that enables the boiler and the room thermostat to
communicate. Based on the information from the room thermostat the flow temperature
of the boiler is adjusted to the most optimal value.
The Open Therm (OT) room thermostat has te be connected to the contacts 11 and 12
of connector X4 (see chapter 13, electrical diagram ).
CAUTION
Connecting the Open Therm room thermostat to other
contacts than 11 – 12 may damage the room thermostat !
8.3.4
Outside temperature sensor (weather dependent regulation)
The appliance is equipped with a connection for an outside temperature sensor. The
outside temperature sensor can be used in combination with an on/off room thermostat.
Note
When using a programmable Open Therm or Honeywell RF
thermostat in combination with an outside sensor the function
of this sensor is limitted to transfering the outside temperature
to the roomt hermostat. The weather dependent regulation of
the boiler controller in this situation is inactive.
Connect the outside temperature sensor (See § 8.3.1).
For the heating line setting, see weather-dependent regulation (See § 10.6 ). The sensor should
be fitted where possible on a north facing wall.
8.3.5
230 volt room thermostat with timer function
To be connected to contacts 1 and 3 of connector X2.
See electrical diagram.