Pfannenberg PWS Series - Manual (Page 8)

PWS Series Air/Water Heat Exchangers
5
SECTION 4: INSTALLATION CON'T
4.5 Condensation Water Connection
Drainage hose must be secured in place with clamps.
To ensure reliable drainage of condensation water,
please note the following:
The drain hose shall not be kinked. Hose cross-section
must not be constricted in any way. The drainage hose
must slope in the right direction.
To avoid excessive condensation water amounts,
please note the following:
Adjust the cooling water temperature to the cooling
performance required.
Only use the device on sealed electrical panels and
housings.
Set the desired temperature only as low as is really
necessary (to avoid the cooled air from dropping
below the dewpoint).
4.6 Door Contact
To avoid an increased production of condensate
and for safety reasons a door limit switch should be
connected to the terminals provided.
WA R N I N G !
No external voltage may be applied to the door contact
circuit or damage to the cooling unit may result.
In order to prevent any interference from outside
signals, it is recommended that a shielded cable with
a twisted pair leads be used for the connection. The
cable shielding can be connected on one side to the PE
(ground) connection point provided on the cooling unit.
If the use of a shielded cable is not possible, the cable
that is used must not be routed in the immediate
vicinity of potential sources of interference such as
power supply lines , components with a relatively high
electromagnetic emission (EMI), etc.
If no door contact switch is used, the connecting
terminals must be jumpered for the cooling unit to
operate.