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Wiring diagram
LW 9
Air flow monitor
S1
Air flow monitor sensor before
the DRH 25-6/ERH 25-2
JP1
Plug jumper on operating mode
"H". Relay switches on as the
temperature drops.
TH 10
Thermostat
R1
Temperature sensor after the
DRH 25-6/ERH 25-2
US 16 T
Universal contactor
Electric air heater (preheating register)
DRH 25-6
Standard
ERH 25-2
Alternative for application
areas up to max. 450 m³/h
86
The air flow controller sensor "S1" must be
installed in the air flow direction, at least
30 cm ahead of the electrical air heater.
The TH 10 temperature sensor "R1" must be
installed in the air flow direction, at least
50 cm after the electrical air heater.
We recommend installing the filter box
TFE 25-4 (with G4 filter) to protect the
electrical air heater against dirt. If a filter box
is used, the G4 filter in the outside air channel
can be removed from the heat recovery unit.
An earth heat exchanger as an air or brine
collector can be used to keep the heat
exchanger free of frost.
Make sure there is protection
i
against condensation for the
external heat register, filter box,
outside air and outgoing air
channel: These must be diffusion-
resistant insulated to protect against
condensation.
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