Service manual

EP-200 SERIES PUMP INSTALLATION, OPERATION AND SERVICE MANUAL
14 of 27
SECTION 8: MOTOR WIRING
All wiring must comply with current wiring regulations
and any local regulations which may apply. Always
switch off the supply and disconnect before servicing.
8.1 Impeller Rotation Direction
Prior to operation of the pump in the heating system,
operation and proper rotation of the impeller must be
verified.
The EP-200 series motor must be wired for clockwise
or counterclockwise rotation as shown on Page 14,
Figure 13.
IMPORTANT: Improper rotation of the impeller will
not produce the vacuum required for proper system
operation.
8.2 EP-201 Wiring
The EP-201 motor is wired for 1 Ø, 120 V, 60 Hz
operation. The EP-201 motor can be rewired for 230 V
operation by changing the motor connections as
indicated by the diagram on the motor connection box
cover.
When controlled by a system control use Contactor
Package 17A (P/N 10050011). See Page 14, Figure
13. See ROBERTS GORDON
®
System Control Manual
(P/N 10091601NA) wiring details.
Wire the pressure switch per the heaters’ Installation,
Operation and Service Manual or appropiate controller
installation manual.
FIGURE 13: EP-201 Motor Wiring
8.3 EP-203 Wiring
The EP-203 motor can be wired for 3 Ø, 208 V - 230
V, 60 Hz or 3 Ø, 460 V, 60 Hz operation.
The EP-203 motor rotation direction can be changed
by interchanging any two leads.
When controlled by a system control use Contactor
Package 17A (P/N 10050011). See Page 15, Figure
14. See ROBERTS GORDON
®
System Control Manual
(P/N 10091601NA) wiring details.
Wire the pressure switch per the heaters’ Installation,
Operation and Service Manual or appropiate controller
installation manual.
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Appliance must be properly grounded.
Failure to follow these instructions can result
in death or electrical shock.
Ground
Screw
O
r
a
n
g
e
B
r
o
w
n
/
W
h
i
t
e
Y
e
l
l
o
w
/
B
l
a
c
k
B
l
a
c
k
Y
e
l
l
o
w
W
h
i
t
e
B
r
o
w
n
R
e
d
115V Power Supply
(Control Panel or Relay)
Motor Junction Box
B
r
o
w
n
/
W
h
i
t
e
Line
Motor
Interlock
(Not Used)
Neutral
EP-201 Motor
To reverse rotation,
interchange black
and red leads.