Instruction manual WWH-EC and WWH-LT Air heater
Page 9/14
4.3.2
Connection with room thermostat combined with contact thermostat
This option is applied when the boiler is controlled by its own thermostat and there is a continues hot
water supply.
Operation:
The on/off thermostat will switch when there is heat demand. The contact thermostat will not close
(connect) before the water has reached the pre-set temperature. In this situation, the fan of the WWH will
transport hot air. This will prevent draught.
The boiler must be turned on and off separately.
4.3.3
Connection with contact thermostat
.
This option is applied if the thermostat of the boiler is in the same room as the WWH.
Operation:
The contact thermostat will close if the water has reached the pre-set temperature. In this situation the
WWH will only discharge hot air.
The boiler thermostat will switch on the boiler. The boiler will pump hot water around. The contact
thermostat of the WWH will close if the water is hot enough. The fan will blow hot air into the room. If the
boiler is shut off by the boiler thermostat, the water will cool down and the contact thermostat will open
(disconnect) and will cause the WWH to stop blowing
L (230V AC)
T
1
3
2
N
Aanleg thermostaat
Contact thermostat
Rohranlegeregeler
Thermostat d´applique
art: IH8500
M
T
1
3
2
Ruimte thermostaat
Room thermostat
Raumthermostat
Thermostat d´ambiance
art: IW3950
Motor WWH
L (230V AC)
T
1
3
2
N
Aanleg thermostaat
Contact thermostat
Rohranlegeregeler
Thermostat d´applique
art: IH8500
M
Motor WWH
