Roberts Gorden HP 208 V 3, HP 208 V 1, HP 230 V 1 System Control, Typical External Wiring Diagrams

SECTION 4: TYPICAL EXTERNAL WIRING DIAGRAMS

SECTION 4: TYPICAL EXTERNAL WIRING DIAGRAMS

DANGER

Electrical Shock Hazard

Disconnect electric before service or maintenance.

More than one disconnect switch may be required to disconnect electric to the unit.

Failure to follow these instructions can result in death or electrical shock.

4.1EP-100 or EP-201 120 V 1 Ø Pump External Wiring Diagram

The external wiring diagram above shows the con- nections for four zones of system burners. System burners can be either CORAYVAC® or VANTAGE® 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 below shows connection to an EP-100 or EP-201 120 V 1 Ø pump.

4.1.1External 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.

FIGURE 5: External Wiring Diagram ROBERTS GORDON® EP-100 and EP-201 120 V 1 Ø Pump

EP-100 or		EP-100 or	TWO PUMP SYSTEM (optional)
EP-201 Pump All burners must be		EP-201 Pump	Pump 1 may be used for all zones.
	connected to Ground		Pump 2 may be used to control
	(Not shown)
			zone 3 and/or zone 4.
Zone 1 Zone 2 Zone 3 Zone 4

	Low voltage thermostats
Pressure		located in heated zone			Pressure
switch	Zone	Zone	Zone	Zone	switch
located at					located at
Pump 1	1	2	3	4	Pump 2

120 V

120 V

1 Ø

1 Ø

60 Hz

24 VAC

60 Hz

L

N

Ground

G

N L

N L

N L

N L

N L

N L

24 VAC PS 1

R

R

R

R

PS 2

N

L

COM

POWER

PUMP 1

Z1

Z2

Z3

Z4

PUMP 2

SUPPLY

24 VAC

PS 1

W

W

W

W

PS 2

COM

System Control

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