Atmos
Heating Systems
Installation and user manual EN_FMT
15
CHAPTER 3. SUSPENDING THE UNIT
3.1. The unit
Before unpacking the unit, check
whether the type of gas to be used
corresponds with the specification
on the packing. If you have any
questions, contact your supplier.
To prevent back injury, take
account of the fact that the weight
of the unit is roughly 35 kg.
3.2. Suspension
Place an O-ring in the middle of each of the connections
present (1) - (5).
Remove the caps from the pipes of the unit.
Keep the unit straight against the wall at about 5 cm above
the site of the mounted assembly bracket or the assembly
cabinet.
Press the unit into the guide and let it drop carefully, so that
the hook on the suspension bracket falls into the opening at
the rear of the unit and the pins at the bottom of the unit fall
in the corresponding openings in the suspension bracket.
Here, the connection pipes of the unit fall over the
connection points of the suspension bracket.
Firmly tighten the union nuts of each of the connections
present (1) to (5) with the aid of a spanner.
3.3. Fitting the flue tube and air supply
3.3.1. Connecting the eccentric flue and air supply (2-
pipe system)
When the flue tube and air supply are connected
eccentrically, proceed as follows:
1. Fit the flue tube in the opening, in the suspension
bracket.
2. Let the pipe protrude 30 -35 mm under the clamping
plate.
Slide the sliding piece (1) upwards over the flue tube.
3. Fit the air supply in the opening in the suspension
bracket.
4. Let the pipe protrude 40 - 45 mm under the clamping
plate.
5. Fit the rubber bellows over the air supply pipe and seal
them with the hose clip.
6. Fit the clamping plate on the suspension bracket and
tighten it with the three screws supplied. Take care here
that the clamping plate falls in the groove of the sliding
piece.
3.3.2. Connecting the concentric flue tube and air
supply (80/125 mm adapter)
When the flue tube and air supply are connected
concentrically, proceed as follows:
1. Fit the 80/125 mm adapter on the unit before you place
the unit.
2. After you have placed the unit, fit the concentric pipes on
the 80/125 mm adapter.
3.3.3. Connecting the concentric flue tube and air
supply (60/100 mm adapter)
When the flue tube and air supply are connected
concentrically, proceed as follows:
1. Fit the 60/100 mm adapter on the unit before you place
the unit.
2. After you have placed the unit, fit the concentric pipes on
the 60/100 mm adapter.
3.4. Condensation water drain/overpressure protection
on drain
Make a tundish between the condensation water
drain/overpressure protection of the unit and the drainpipe.
3.5. Connection block
The connections of the green connection block are all volt-
free contacts. Therefore, do not connect 230 Volts to them!
terminals (1) - (2)
Connection for 24 Volt thermostat
terminals (3) - (4)
Connection for 12 kOhm external
temperature sensor
terminals (5) - (6)
Connection for 10 kOhm or 12 kOhm
sensor of external cylinder
If no on/off room or modulating room thermostat is used at
all, terminals (1) and (2) must be connected by wire.
3.5.1. On/off room thermostat (if applicable).
Connect to terminals (1) and (2)
The on/off room thermostat (24 V) must be fitted in the
same building as the unit.
Strip about 5 mm off the insulation of the wires of the room
thermostat. Stick the stripped ends of the wires into
connections (1) and (2) of the connection block. Make sure
that the wires do not make a short circuit. Firmly tighten the
screws in the connection block.
3.5.2. Modulating room thermostat (if applicable).
Connect to terminals (1) and (2)
The modulating room thermostat must be fitted in the same
building as the unit.
Strip about 5 mm off the insulation of the wires of the room
thermostat. Stick the stripped ends of the wires into
connections (1) and (2) of the connection block. Make sure
that the wires do not make a short circuit. Firmly tighten the
screws in the connection block.
