System control, Ground – Roberts Gorden CoRayVac CRV-B-6 User Manual
Page 56
CRV-S
ERIES
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
50
FIGURE 31: General System Wiring
FIGURE 32: External Wiring Diagram EP-100 and EP-201 120 V 1 Ø Pump
Burner Receptacles
4 Zone Max
120 Vac
Maximum 20 Amps Total
Thermostats
Pump Motor
115 Vac Operation
(230 Vac Operation
separate power circuit
required for EP-203 or
EP-300 series pumps)
Pressure
Switch
Dotted Line Optional
Motor Starter
Pump 2
Pressure
Switch 2
L
120 V
1 Ø
60 Hz
N
T
T
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-100 or
EP-201 Pump
N L
EP-100 or
EP-201 Pump
L
N
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.
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