Raypak 300, 850 operating instructions Electrical Power Connections

Model

3/4” NPT

1” NPT

1-1/4” NPT

1-1/2” NPT

2” NPT

No.

N

P

N

P

N

P

N

P

N

P

300

15

30

45

100

175

400

390

500

10

15

40

65

150

150

350

850

15

25

55

55

125

175

450

Natural Gas

– 1,000

BTU/ft3, 0.60 specific

gravity at

0.5 in. WC pressure drop

Propane Gas – 2,500 BTU/ft3, 1.53 specific gravity at 0.6 in. WC pressure drop

Table J: Maximum Equivalent Pipe Length

Electrical Power Connections

pump, 3 A max DHW pump) and may control a third

may power up to two pumps directly (1 hp max boiler

Installations must follow these codes:

system pump, depending on the configuration of the

controller and the installation requirements. Install a

• National Electrical Code and any other national,

circuit breaker sized sufficiently for both the heater and

state, provincial or local codes or regulations hav-

the pump(s). DHW pumps larger than 1/4 hp or 3 A

ing jurisdiction.

must use a separate power supply and run the power

• Safety wiring must be NEC Class 1.

through an external field supplied pump contactor. Use

• Heater must be electrically grounded as required

appropriately-sized wire as defined by NEC, CSA

by the NEC.

and/or local codes. All primary wiring should be 125%

• In Canada, CSA C22. 1 C.E.C. Part 1.

of minimum rating.

The XFyre 300–850 heaters are wired for 120 V sin-

If any of the original wire as supplied with the heater

gle-phase 60 Hz power. Consult the wiring diagram

must be replaced, it must be replaced with 105°C wire

shipped with the heater. Before starting the heater,

or its equivalent.

check to ensure proper voltage to the heater and

All 120 VAC field wiring connections to the XFyre

pump(s). A larger circuit breaker may be needed for

pumps larger than 1/4 hp.

heater are made inside the rear wiring box as shown

in Fig. 11a. Power to the XFyre heater should be con-

Boiler pumps up to 1 hp and DHW pumps up to 1/4 hp

nected to terminals 1, 2, and 3 as shown in Fig. 11a.

get their power supply directly from the heater power

Low voltage wiring is connected to the field wiring

supply (connections in rear wiring box). XFyre heaters

board at the front of the unit. Sensors, Thermostat (TT)

Fig. 11a: Wiring Electrical Connections	Fig. 11b: Wiring Electrical Connections
	Cascade Master

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