8
REMKO PWL
Electrical connections of the unit
must only be established by autho-
rised specialists in compliance with
the applicable regulations of the
local electricity supply company as
well as the VDE installation requi-
rements relating to the unit.
Connection of the units
The units are fitted with two-
speed, 400V three-phase axial
flow fans as standard.
Speed selection takes place with
appropriate control units (accesso-
ry).
Changes in direction take place via
a pole changing switch or special
control unit (accessory).
Motor protection is provided via
integrated thermal contacts in
conjunction with a suitable control
unit (accessory).
Connection of the three-phase
motors to the respective control
units takes place via the associated
electrical wiring diagrams.
ATTENTION
Failure to observe the pertinent
requirements, operating inst-
ructions and electrical wiring
diagrams relating to the unit
can give rise to malfunctions
with consequential damage.
This will invalidate the war-
ranty!
Connection of several units
If necessary, several units (also
different sizes) can be operated
parallel via a control unit (accesso-
ry).
The total capacity of the con-
nected units must not exceed the
maximum switching capacity of
the respective control unit.
For thermal motor protection, the
thermal contacts of all motors
must be connected in series. See
separate wiring diagrams.
Only one external control device
(thermostat, day/night control,
etc.) can always be connected per
control unit.
Terminals in the unit
Fuse protection in the supply to
the control unit must be in compli-
ance with the applicable regulati-
ons.
The connections in the terminal
box must be connected to the
respective control unit (accessory).
Electrical connection
ATTENTION
When the fan is stationary,
the hydraulic supply must be
simultaneously interrupted.
ATTENTION
Only suitably trained specialists
may establish electrical con-
nections.
Connection to the local hy-
draulic system
Prior to connection to the local
hydraulic system, it must be en-
sured that the respective capacity
requirements of the unit can be
provided at all times.
■
Connection of the unit on the
water side must take place local-
ly via suitable pipe fittings and
shut-off valves in the flow and
return.
The use of compensators and
automatic venting devices is
recommended!
■
The connection side at the top
and the flow and return can be
connected as required.
■
The pipe connection thread sizes
is R 1“ internal thread.
■
The fin heat exchangers must be
thoroughly vented after installa-
tion.
Air cushions in the heat exchan-
ger will reduce the heating or
cooling capacity!
Hydraulic connection
Water inlet
Water outlet
NOTE
In order to prevent damage
due to twisting of the con-
necting pipes, a suitable tool
must be used to prevent the
connecting pipes rotating
while tightening the screwed
connections.
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
W2
U2
V2
TK
PE
1
3 4
2
U1
V1
W1
TK
PE PE N
L1
3 2
Kondensatpumpe
für Kühlbetrieb
C
Ö
S
N
Potenzialfreier Alarmkontakt
1
K
on
de
ns
at
pu
m
pe
K
on
de
ns
at
pu
m
pe
Summary of Contents for PWL 101-3
Page 2: ......
