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3 - INSTALLATION
■ Direct expansion coil
Installation must be performed by qualified personnel.
For coils containing "SPLIT SYSTEM" refrigerant, the unit must
not be stored near to a source of heat or in direct sunlight (increase
in refrigerant pressure).
■ Droplet eliminator
They are placed downstream of the cooling coil. Clean them once
a year with suitable products to remove any deposits. Specially
designed products are available for this operation.
3.5 - Electric heaters
Electrical connection and control with the fan motor assembly:
Always follow general safety instructions and especially current
standards (e.g. NFC 15-100 on overcurrent and overvoltage
protection) when making electrical connections.
IMPORTANT: Always install an air flow pressure switch
(control lot) and program a fan delay time of several minutes.
IMPORTANT: Connect the electric heater with high-
temperature wires. Take into account the temperature inside
the electric heater when selecting these wires.
■ exemple :
Power circuit supply
FAN MOTOR
Q
Main disconnect switch
QV1 Fan motor thermal-magnetic circuit breaker
KV1
Fan motor switch
MV1 Fan motor
QR1 Electric heater thermal cut-out
KR1 Electric heater switch
R1
Electric heater
NB: Do not earth the electric heater (class 2 insulation). Instead, make a connection to the casing as close as possible to
the heater.
14
Example: for a 2.5 diameter, 50 m cable (4 conductors), the
following are available:
Connect these wires to the designated terminals and the terminals
on the manual and automatic reset thermostats (depending on
unit) inside the box.
The stages (power-connection terminals) are identified with labels
of the same colour.
If there are three stages, there will be three sets of these labels.
The connections must be made as per the schematic diagram
(example for connection of two heaters
Control circuit
1
2
ELECTRIC
ELECTRIC
HEATER
HEATER
QR2 Electric heater thermal cut-out
KR2 Electric heater switch
R2
Electric heater
QT1 Remote control thermal cut-out
INT
On/off switch
K1
Time-delay relay
PA
flow rate controller
- 80°C high temperature cable: Max current: 45 A
- 120°C high temperature cable: Max current: 27 A
Power
1 ph
2 ph
BSC1 Electric heater safety thermostat
automatic reset
BSC2 Electric heater safety thermostat
manual reset
BSC3 Electric heater safety thermostat
automatic reset
BSC4 Electric heater safety thermostat
manual reset
TH1
Room thermostat
TH2
Room thermostat
3 ph
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