Wiring Diagram - Westinghouse P0-6 Instructions Manual

INSTALLATION
Fan Motor Wiring.
are 3 phase, 60 cycle, 220/440 volt. They may be
used on 50 cycles with the corresponding reduction
in speed. Single phase and 550 volt motors will be
furnished on order.
A switch or circuit breaker providing thermal
overload protection should be mounted convenient
to the operator and connected to the motor as shown.
Turn the fan wheel by hand to be sure that it
turns free. Then turn on power and check fan ro­
tation with the direction arrow on the motor housing.
To reverse rotation, interchange two line leads.
Grounding the Unit.
permanent low resistance ground using solid or
flexible copper cable. Use a dummy screw in the
side opposite the power pack for this connection.
Relocating the Power Pack.
relocated to opposite side of the cabinet for con­
venience of the duct layout.
holes are provided on the opposite side of the cabinet.
Relocation involves disconnecting all external lead
connections to the p o w e r pack, removing power
pack mounting screws, relocating high voltage cables
and wiring hardware, and reconnecting power pack
to the other side of cabinet. Cover unused wiring
and mounting holes with the plug buttons and dummy
,...,...
mounting screws to prevent air leakage. On early
design units, unscrew the inspection window and
L1
uo/440-.T
�I!"MAaa
FAN MOTOR WIRING DIAGRAM
TRANS. PRIMARY
AMMETER
. LOW \/OLTAGE
IISV. SUPPLY
,------------�
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MtMEiER.
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PACk: OE.LAY
TIM£.
L
---- -��·'!f':L.
____ _ _____
POWE.R PACK
(li�HT
(HEAV'l \.IN. E S- HIGH VOL
FIG. 4
Fan motors on standard uni ts
Connect the cabinet to a
Power pack may be
Duplicate mounting
�o�6"�i:r�R5s�1J'�T�L�1:L��\o,_.�e
HEATERS SUPPUED
WITH Z20V SUPPL'l.
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CAB I N£T SW. PACK JW.
BREAKER
SCHEMATIC DIAGRAM
--- ----- ��·� ��--------------
TERMINAL &LOCK
SUPPL't VOLTAGE IS BElOW 113\1
CHANGE
H1V c.,."""''l! "TO "TP.P "1'"
--- ...
__ __
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WIRING DIAGRAM

LINES-lOW \IOLTI'G�)
TH�S RES\SlOR
FURI'iiSHEO <.le"'4LY
ON. PO-I'a UNIT
WIRING DIAGRAM
move to the opposite side. Note: Mark each lead
when it is disconnected to a s s u r e p r o p e r re­
connection.
Adjustment of the Outlet Damper.
pleting installation, the outlet damper should be ad­
justed to assure proper air volume through the unit.
This is done simply by setting the damper so that full
load current is drawn by the fan motor. With full
load current, units deliver very nearly rated cfm.
T h i s adjustment eliminates need for direct air
measurements which are considered unreliable for
oil mist units when made at the installation site.
An a.c. ammeter (0-5 amp scale or smaller) is
needed to accurately measure the motor current.
should be connected in fan motor circuit so that it
may be short circuited or otherwise protected while
motor is started. With fan running, release set screw
and position damper so that full load (nameplate)
current is drawn. Tighten set screw to hold damper
in this position. Note:
current is drawn with damper wide open, the external
duct system is probably undersized as explained in
"Air Flow Requirements".
Normal Operation.
adjusted, normal operation consists of keeping the
power pack and fan operating when oil mist is being
generated. With the power pack circuit breaker
"on" the ammeter should be in the white range
(0.4-0.6) for the P0-12 unit and for the P0-6. Recti­
fier tubes are visible through the window and should
glow at an "incandescent lamp" color. A blue glow
around the filament is ser;ous only when it is pro-
1. B. 1450. 2
PRECIPITRON
CONNECliONS f"OR Z20V
SUPP\.'(
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TO ""TAP "'2" 0� AOOVE
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1
After com-
less than full load motor
H
After the unit is properly
It
5