Raypak 1005 operating instructions Electrical Power Connections, Gas Supply Pressure

Model

1-1/4” NPT

1-1/2” NPT

2” NPT

2-1/2” NPT

No.

N

P

N

P

N

P

N

P

1005

35

55

35

90

125

300

300

1505

10

15

15

25

60

150

150

275

2005

35

90

85

210

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

Gas Supply Pressure

Table J: Maximum Equivalent Pipe Length

• Heater must be electrically grounded as required

• Safety wiring must be NEC Class 1.

A minimum of 4.0 in. WC and a maximum of 10.5 in.

by the NEC.

WC upstream gas pressure is required under load and

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

no-load conditions for natural gas. A minimum of 4.0

XTherm heaters are wired for 120VAC single phase

in. WC and a maximum of 13.0 in. WC is required for

propane gas. If upstream pressure exceeds these val-

power. Models 1005 and 1505, except WH 1505 mod-

ues, an intermediate gas pressure regulator, of the

els equipped with a heater pump for hard water,

lockup type, must be installed.

require 15A service for the heater and 15A service for

the heater pump or a single 30A rated circuit.

Model

When connecting additional gas utilization equipment

1505 heaters equipped for hard water require 15A

to the gas piping system, the existing piping must be

service for the heater and 20A service for the heater

checked to determine if it has adequate capacity for

pump or a

single

40A rated circuit.

Model 2005

the combined load. The gas valve pressure regulator

heaters require 20A service for the heater and 20A

on the heater is nominally preset as noted in Table K.

service for the heater pump, or a single 40A service.

Consult the wiring diagram shipped with the heater.

During normal operation, carbon dioxide should be 8.5

Use appropriately sized wire as defined by NEC, CSA

to 9.0% at full fire for natural gas and between 9.5 and

and/or local codes. All primary wiring should be rated

10.0% for propane gas. Carbon monoxide should be

for 125% of the minimum required service.

Before

‹100ppm.

starting the heater, verify that the correct 120VAC volt-

age is being supplied to the heater and pump.

Model No.

Manifold Gas Pressure

If any of the original wire supplied with the heater must

(High Fire Values)

be replaced, it must be replaced with 105°C or its

equivalent.

Natural Gas

Propane Gas

Power is connected to the heater via the rear wiring

1005

-1.1

-0.6

box as shown at the top of Fig. 19. Main heater power

1505

-1.6

0.3

is connected to terminals 1, 2 and 3 and pump power

2005

-1.8

-2.0

is connected to terminals 4, 5 and 6.

Field wiring connections such as sensors, interlocks,

NOTE: Manifold pressures should be ±0.2 in. WC.

Table K: Manifold Gas Pressure Settings

enable/disable and alarm contacts are made at the low

voltage terminal strip at the front of the heater as

Electrical Power Connections

shown at the bottom of Fig. 19.

Field-Connected Controllers

Installations must follow these codes:

It is strongly recommended that all individually-pow-

• National Electrical Code and any other national,

ered control modules and

the heater

should be

supplied from the same power source.

state, provincial or local codes or regulations hav-

ing jurisdiction.

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