Post-heating radiator
The post-heating radiator of the VALLOX 70 COMPACT unit is a PTC resistor, which aims at
heating the air blown to the rooms to preset temperature. The temperature of supply air is
adjusted at the thermostat regulator located inside the unit. The post-heating radiator is a PTC
resistor, the laminas of which are live when the unit is in operation. The PTC resistor must not
be touched before the unit has been switched off. It is advisable to set the thermostat at 0
°
C
in summer. In this case, the radiator does not heat air.
Preheating radiator
Vallox 70 Compact comes standard with a preheating radiator. The antifreeze thermostat
switches the radiator on instead of stopping the outdoor air fan. The radiator heats outdoor
air before the cell, preventing it from freezing. In very cold temperatures the preheating radiator
is not enough to heat maximum air flow to a sufficient degree (In a temperature of minus 30
degrees Celsius, maximum air flow is 30 dm
3
/s, which corresponds to speed 2 or 3). The
threshold values for automatic antifreeze can be adjusted inside the unit. The tubular preheating
radiator is connected to two overheat protectors. One of the overheat protectors is automatically
resetting (type BTS) and the other is a cut-off one (type BTC, cut-off). If the overheat protectors
have tripped, switch off the unit for a moment.
© VALLOX • We reserve the right to make changes without prior notification.
What the units include can vary depending on the sales area.
PRE- AND POST-HEATING
5
VALLOX 70 COMPACT
FILTER GUARD (option)
TER GUARD (option)
70 Compact
70K Compact
Indicator lamp
Filter guard
Indicator lamp
Filter guard
Filter guard
VALLOX 70 COMPACT can be equipped with an
optional
filter guard.
The filter guard indicator lights up at speeds 3 and 4 when the filters
are clean; this is normal and does not call for any maintenance activities.
If the indicator does not light up at speed 4, the pressure in the ventilation
ductwork of the building differs from the factory setting. When needed,
an expert may change the setpoint.
If the filter guard symbol already lights
up at fan speed 1 or 2, the filters need cleaning
. If they are clean, the lighting
up may be caused by a clogged up dense mosquito net installed against
mounting instructions in the external grille or by the closing of the supply
air valves in the rooms.
