3 Installation
3.1 Installing the unit
The PGK duct cooler is designed for using chilled water as the cooling medium. The duct cooler coil
consists of copper tubes and aluminium fins.
Warning
The cooling coil must not be used for direct-expansion refrigerant.
For air flow, water flow and other technical particulars, see tabells in chapter 4.
The cooler should not be installed close to a fan outlet or a duct bend, since the air flow across the coil
would then be uneven and the cooling capacity would thus be impaired.
Make sure that the cooler is installed so that the finned coil, drip tray and condensate outlet are accessible
for cleaning (chapter 5). The duct cooler should be installed in a horizontal duct, but the air flow may be in
either direction. Secure the duct cooler to the duct system by means of screws or slip joints.
The condensate outlet (pos C) in figure 2 should be connected across a water trap in order to avoid
air leakage.
Note:
The size of the outlet should be such that no water will remain in the drip tray. When the drip tray is to be
removed, ensure that the condensate outlet is easy to disconnect.
An efficient filter is recommended in the system in order to reduce fouling and thus also cut down the
need for maintenance (see chapter 5).
The duct cooler should be installed downstream of the fan unit, although it can also be installed upstream,
but care should then be taken to ensure that the fan motor and other components will not be harmed by
the humid air downstream of the cooler.
The duct cooler must be insulated on the outside, so that no condensate will form. The ducts that carry
the chilled air must normally also be insulated.
3.2 Water connections
Operating data: Max. operating temperature/operating pressure 100°C/1.0 MPa (10 bar)
PGK
Installation and Service
172391
2
Systemair AB
