Ep-201 Or Ep-301 230 V 1 Ø External Wiring Diagram - Roberts Gorden System Control HP 120 V 1 Installation & Operation Manual

S C I , O
YSTEM ONTROL NSTALLATION PERATION AND
FIGURE 6: External Wiring Diagram ROBERTS GORDON
120 V
1 Ø
120 V
60 Hz
1 Ø
60 Hz
L
N
Ground
POWER
SUPPLY
4.2 EP-201 or EP-301 230 V 1 Ø External Wiring
Diagram
The external wiring diagram above shows the
connections for four zones of system burners.
System burners can be either CORAYVAC
TAGE NP (multiburner only).
®
The zones are connected to a single pump, unless
zone 3 and/or zone 4 are selected to function with
the optional pump 2. The external wiring diagram
above shows connection to an EP 301 or EP-201 1 Ø
8
S M
ERVICE ANUAL
EP-100, EP-201 or
EP-301 Pump
Motor Contactors
P/N 10050011
P/N 10050012
6 4
2
The power supply for the
pump must be separate
M
from the controller supply
3 1
5
L1
L2
All burners must be
connected to Ground
(Not shown)
Zone 1 Zone 2 Zone 3 Zone 4
N L N L N L
N L
Z3
Z1 Z2
PUMP 1
System Control
or VAN-
®
EP-100, EP-201 or EP-301, 230 V 1 Ø Pump
®
Product Damage Hazard
Do not directly connect control relay terminals
to pump motor.
Failure to follow these instructions can result
in product damage.
208 - 230 V
1 Ø
Individual supply for
pump rated for total full
60 Hz
load current. See Section
2.3 for details.
EP-100, TWO PUMP SYSTEM (optional)
EP-201 or
Pump 1 may be used for all zones.
EP-301 Pump
Pump 2 may be used to control zone 3
and/or zone 4. Refer to Pump 1 for configuration.
Pressure
switch
located at
pump 1
24 VAC
24 VAC PS 1
N L N L
COM
Z4
PUMP 2
24 VAC PS 1
COM
pump.
4.2.1 External Wiring Connection Details
The cable used for all the wiring must be rated for
line voltage up to 600 Vac.
The low voltage circuit conforms with Class 2 separa-
tion of circuit requirements. National Electrical Codes
for wiring class 2 low voltage circuits must be followed.
CAUTION
Low voltage thermostats
located in heated zone
Zone Zone Zone Zone
1 2 3 4
R R R R
W W W W
Pressure
switch
located at
pump 2
PS 2
PS 2
®