EP-203 or
EP- 303 3 Ø Pump

SECTION 12: CONTROL METHODS

FIGURE 31: External Wiring Diagram EP-301 120 V 1 Ø Pump

120 V

1 Ø

120 V 60 Hz

1Ø

60 Hz

L

N

Ground

All burners must be connected to Ground. (Not shown.)

Zone 1 Zone 2 Zone 3Zone 4

EP 301

Pump Do not directly connect the controller relay terminals to the pump motor. Product

damage will result.

IEC contactor (P/N 10050009) rated for the EP 301 pump motor

6

4

2

The power supply for the

pump must be separate

 

 

Mfrom the controller supply.

3

1

 

 

 

230 V

Individual supply for

5

 

 

 

 

 

 

 

 

pump rated for total

 

N

 

 

 

1 Ø

full load current.

 

L

 

 

 

60 Hz

 

 

 

 

 

 

 

Low voltage thermostats

 

 

located in heated zone.

 

 

Zone

Zone

Zone

Zone

Pressure switch

 

located at pump.

 

1

2

3

 

4

 

 

 

12 Vdc

Ground

G

N

L

 

 

 

N L

 

N L

 

N L

 

N L

N L

 

 

 

 

 

 

 

 

Z1

Z2

Z3

Z4 PUMP

System Control

C

C

 

C

C

C

T1

 

T2

T3

T4

PS

FIGURE 32: External Wiring Diagram EP-203 or EP-303 208 V - 230 V (or 460 V) 3 Ø Pump

120V

1 Ø

60Hz

L

N

Ground

Motor starter (P/N 10050001) rated for EP-203 pump motor; motor starter (P/N 10050010) rated for EP-303 pump motor.

All burners must be connected to Ground. (Not shown.)

Zone 1 Zone 2 Zone 3 Zone 4

120 V

1 Ø

60 Hz

Do not directly connect the controller relay terminals to the pump motor. Product damage will result.

The power supply for the pump must be separate from the controller supply.

OL

208 - 230 V

 

 

(or 460 V)

M

3 Ø

L3

60 Hz Individual supply

for pump rated for

L2

total full load current.

L1

 

Low voltage thermostats located in heated zone.

Zone Zone Zone Zone

1 2 3 4

Pressure switch located at pump.

12 Vdc

Ground

 

G

N

L

 

N L

 

N L

 

N L

 

N L

N L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Z1

Z2

Z3

Z4 PUMP

System Control

C

C

C

C

C

T1

T2

T3

T4

PS

47

Page 53
Image 53
Roberts Gorden CRV-B-2, CRV-B-8, CRV-B-9, CRV-B-12A, CRV-B-6, CRV-B-10, CRV-B-4 service manual 208 230

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