Power Connection; Cooling Water Connection - Pfannenberg PWS Series Installations-, Betriebs- Und Service-Handbuch

WA R N I N G !
Please note the information on the "Thread
Reach for Set Screw" label attached to the
cooling unit. If the noted installed thread depth
is exceeded the cooling unit may be damaged.
Install the cooling unit mounting insulation strips (in
the accessory pack) to the cooling unit as noted on
the individual cooling unit information sheet.
Make sure that the insulation strips are correctly
attached and placed correctly on the cooling unit.
The correct fitting and location of the insulation
strips is required for the proper operation of the
cooling unit.
Attach the cooling unit to the electrical panel
enclosure by use of the stud bolts inserted as
described above.
WA R N I N G !
Do not move the cooling unit by the piping.
Doing so will damage the cooling unit and
void the warranty.
The cooling unit is then completely attached to the
electrical panel enclosure from inside the enclosure
by use of the screws and washers supplied in the
accessory pack.
Tighten the fasteners until the cooling unit insulation
strips are compressed to a thickness of 2 mm
(approximately .080")
Install Drain hose barb (provided in accessory bag
for PWS 3k series only) then attach the condensate
drainage hose to the drain.
Reinstall the cover using the original mounting
screws.

4.3 Power connection

WA R N I N G !
Make sure that the main power supply to the
cooling unit is turned off while making the
power connections.
The cooling unit power supply shall be fused as
indicated on the unit ID plate by means of a series
connected power line connection.
All power connections and / or repairs, if or when
required, shall only be carried out by authorized,
trained electricians.
Power supply connection
PWS 7K series provide a molded cord suitable for the
rated voltage of the unit.
PWS 3k series have hard wire terminal
Both the main power supply voltage and frequency
shall correspond to the nominal values shown on the
cooling unit ID plate.
Connect the main power supply to the cooling unit
as indicated by the label located on the cooling unit
and on the individual cooling unit data sheet.
WA R N I N G !
During installation, service technician must
verify and mark voltage as connected on
service cover warning sticker.

4.4 Cooling Water Connection

PWS 7K series uses Teflon©tape and brass fittings.
Use flexible pressure-resistant (>10bar) hose for the
cooling water connection and secure properly with
clamps.
PWS 3K series has multiple options for connections,
a barb is provided for use with flexible pressure-
resistant hose and clamp.
Observe flow direction (labels on the device located
next to the water connections) Check for leaks.
Protect the water circuit against contamination and
excessive pressure (please refer to the "Water Quality
Notes" section. The maximum permissible operating
pressure is 10 Bar.
(PWS 7K series only)
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