Gardner Denver ELECTRA-SAVER II Service Manual page 31

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NOTES FOR WIRING DIAGRAMS
(Figures 13-4 thru 17-4)
ALL NOTES ARE NOT APPLICABLE TO ALL WIRING DIAGRAMS –
READ CAREFULLY AND COMPLETELY FOR WIRING INSTRUCTIONS.
All equipment must be connected and phased exactly as shown
All
Piping
wiring and other equipment not specified on order
is to be supplied by other than Gardner-Denver Compressors.
Compressor power suPPly disconnecting means–
Fused Switch or Circuit Breaker (not furnished as
a standard item — if orderedj it must be remote
mounted and wired by customer).
EauiDment must be arounded in accordance with
Table 250-95 of the-National Electrical Coda
~WARNING
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"1)" –
An equipment ground jumper equal in size to the equip
ment ground conductor must be used to connect the
compressor motor base to main base because the bases
are isolated from each other by vibration mounts.
The oil cooler motor (when used) is grounded to
the starter as shown The ground conductor for
this motor is compatible to the motor short circuit
protection
When the control circuit voltage is from a separate
power (voltage) source and is not controlled by the
motor power supply disconnecting means a dis
connect switch (DS) interlock (not furnished) shall
be mounted immediately adjacent to the motor
power SUPPlY disconnecting means and wired by
the customer as shown in the Schematic Wiring
Diagram and per the data shown for that starter
and its disconnecting means
This interlocking device (DS) may be an Auxiliary
(Aux) or Electrical Interlock ( E l.) contact operated
by the handle of the motor power supPly discon
netting means
When this disconnect switch (DS) interlock is a
separate device it shall be used to turn the con
trol circuit "OFF' before operating the motor
power SUPPlY disconnecting means See Article
430-74 of the National Electrical Coda
The compressor motor starter is remote mounted
and wired by the customer.
All reduced voltage (current inrush) starters mart
ual and magnetic are also remote mounted and
wired by the customer. See reduced voltage
starter note on page 20.
The compressor motor starter coil voltage shall be
the same as the motor voltage i.e. 200, 230, 460
volts etc, unless the starter is ordered with its own
fused control transformer. The contact (relay or
fan-oil cooler starter interlock) from the compres
sor control panel to the remote mounted starter
control circuit is rated 600 volts
" "D1"
Remote mounted magnetic compressor starter
control circuits are to be connected for TWO (2)
WIRE control
The remote compressor starter control wiring shall
be interlocked with the rest of the control wiring as
shown in the Schematic Wiring Diagram and per
the wiring data shown for the remote starter. The
internal wiring shown is typical only. For exact
wiring see diagram on inside of starter or diagram
supplied with starter.
Motor control circuits must be fused in accordance
with article 430-72 of the National Electrical Code
Control circuits shall have short circuit protection
(fuses etc) in all instances because the control
circuit wiring leaves the starter enclosure to go to
the external devices
An ESG66459 Electrical Group with Buss Limitron
KTK15 (600V-15Q Fuses will be furnished in addi
tion to starter control fuses for water-cooled com
pressers with remote mounted manual reduced
voltage starters
Customer is to mount and wire fuses using the
following m-ounting data Fuse Block Mounting
" D2° –
" E" –
"E, ,, _
Data –
Approximate area 2-1 /2" L x 3" H –
Mounting centers 2.1" no. 29 Drill (.1360) two
holes for No. 8 self-tapping screws furnished with
fuse block and fuses
A G.E CR234 air break manual starter is shown
The undervoltage (latch) coil circuit for the G.E oil
break and other manufacturers' manual starters is
to be similarly reconnected and interlocked as
shown with the compressor control wiring.
Oil Cooler power supply disconnecting means –
Fused Switch or Circuit Breaker. NOT FURNISHED
— and is remote mounted and wired by customer.
Wire and conduit in the following table is sized for
SF. T.EAO. motors when used This table may
also be used for T. EF. C. motors or refer to N.EC
for T. EF. C. motors
Fused combination starter mounted on separate
oil cooler module in NEMA 1 enclosure unless
specified NEMA 4 for outdoor usage
The oil
cooler module is remote from the compressor and
the interconnecting wiring is not furnished This
interconnecting wiring (by customerj is to be inter-
locked with the rest of the control wiring as shown
in the Schematic Wiring Diagram and per the
wiring data shown for oil cooler starter. The
remote oil cooler equipment ground wire must be
13-9-630 Section 4 Page 15