Atmos Energy InterCombi HE32 User Manual download pdf (Page 24)

5.4.3 Outside temperature sensor (Weather compensation option)

The appliance has a connection for an outside temperature sensor. The outside temperature sensor can be applied in

combination with an on/off room thermostat or time clock. If not using either of these, a wire link must be made across X4/6

& 7 (or X2/1 & 3) to give continuous operation.

Preferably, the outside sensor should be mounted on a North facing wall. It should not be located where it might be affected

by (the warmth of) sun light, chimneys, air vents or an open window.

To avoid problems with moisture, the sensor should be placed with the cable outlet downwards and the cable looped so that

the lowest part of the cable is lower than the hole in the wall. Run the cable back to the appliance, ensuring that holes in

walls are sealed, and pass through a suitable cable gland in the bottom of the appliance.

Connect the outside temperature sensor cable to the controller as shown in § 5.4.1.

See Weather-dependent control § 7.6 for the setting of the CH temperature line.

5.4.4 OpenTherm modulating thermostat

The appliance is suitable for connecting an OpenTherm modulating thermostat as shown in § 5.4.1.

The most important function of the modulating thermostat is calculating the supply temperature at a required room

temperature in order to make optimum use of the modulating function. With every heat demand, the appliance display shows

the required supply temperature.

The manual supplied with the OpenThern thermostat should be consulted for more information.

5.4.5 230Vac Electrical connections

230Vac Terminals X2

Description Connector X2 Remarks

Mains In L= 2, N= 4 Earth:see §10.1

Room stat 1= switch live, 3= live (fused)

Frost stat 1 - 3 Parallel through

room stat

Notes

1. The 230Vac stat circuits are alternative to the

24Vdc circuits. If the stat has a neutral

connection for heat accelerator, then connect it

for more efficient operation.

2. The switched live can also be used for S plan or

Y plan circuits (note that the 230Vac live to the

Wiring Centre must come from the same fused

spur as the 230Vac supply to the boiler).

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Atmos Energy InterCombi HE32 User Manual Page 24