Swegon GLOBAL PX Operation And Maintenance Instructions page 34

Internal coils
Water preheating coil
By preheating the outdoor air, it is possible to prevent mois-
ture precipitation in the AHU's outdoor air filter, to reduce
the risk of frosting in the heat exchanger and to eliminate
the risk that pressure sensors and motor control systems are
operating in too low ambient temperature. The setpoint is of
the exhaust air temperature.
Setting
Setpoint
Electrical preheating coil
By preheating the outdoor air, it is possible to prevent
moisture precipitation in the outdoor air fi lter of the air
handling unit, to reduce the risk of frosting in the heat
exchanger and to eliminate the risk that the ambient tem-
perature will drop lower than minimum permissible. The
electrical preheating coil is installed and configured in fac-
tory. The electrical preheating coil will always have its sepa-
rate power supply and main switch.
Setting
Setpoint
PID - Proportional Band
PID - Integral
PID - Derivate
Electrical postheating coil
The electrical postheating coil is installed and configured in
factory. The electrical postheating coil will always have its
separate power supply and main switch. The capacity of the
coil will be controlled proportionally in order to keep a tem-
perature as defined by the selected operating mode.
Setting
Control mode
Setpoint
PID - Proportional Band
PID - Integral
PID - Derivate
34
Settings Factory
range setting
-9,9...99,9°C 1,0°C
Settings Factory
range setting
-9,9...99,9°C 1,0°C
0...100 5
0...100 30
0...100 11
Settings Factory
range setting
Exhaust Supply
Supply
-9,9...99,9°C 21,0°C
0...100 5
0...100 30
0...100 11
ADVANCED SETUP
BOOST
POST VENTILATION
INTERNAL COILS
EXTERNAL COILS
INTERNAL COILS
Water postheating coil
The water postheating coil is installed and configured
in factory. The 3-way valve is not installed and will have
to be installed and wired on site. The capacity of the
coil will be controlled proportionally in order to keep a
temperature as defined by the selected operating mode.
The output O.R.3 on the optional "SAT3" output relay, is
activated whenever heating is desired.
Setting
Control mode
Setpoint
Reaction Speed
Operation and maintenance instructions – v2.8.8 & 2.7.3
Settings Factory
range setting
Exhaust Supply
Supply
-9,9...99,9°C 21,0°C
1...10 5