Roberts Gorden CoRayVac CRV-B-6 - Manual (Page 58)

CRV-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL
52
FIGURE 34: External Wiring Diagram EP-203 or EP-303 208 - 230 V (or 460 V) 3 Ø Pump
System Control
R R R R PS 2 PS 1 24 VAC
COM
24 VAC
COM PS 1 PS 2 W W W W
24 VAC
120 V
1 Ø
60 Hz
Ground
G L N
120 V
1 Ø
60 Hz
PUMP 2 PUMP 1 POWER
SUPPLY
N L
Z1 Z2 Z3 Z4
N N N N L L L L
All burners must be
connected to Ground
(Not shown)
Zone 1 Zone 2 Zone 3 Zone 4
EP-203 or
EP-303 3 Ø
Pump
N L
L
N
208 - 230 V
(or 460 V)
3 Ø
60 Hz
Individual supply
for pump rated for
total full load current.
See Pump Specification
Section for details.
EP-203 or
EP- 303 3 Ø Pump
M
L1
L3
L2
The power supply for the
pump must be separate
from the controller supply
TWO PUMP SYSTEM (optional)
Pump 1 may be used for all zones.
Pump 2 may be used to control zone 3
and/or zone 4. Refer to Pump 1 for configuration.
Motor Contactors
P/N 10050011
P/N 10050012
Low voltage thermostats
located in heated zone
Zone
1
Zone
2
Zone
4
Zone
3
Pressure
switch
located at
Pump 2 Pressure
switch
located at
Pump 1
CAUTION
Product Damage Hazard
Do not directly connect control relay terminals
to pump motor.
Failure to follow these instructions can result
in product damage.