Raypak HD401, HD101 Electrical Power Connections, Gas Pressure Regulator, Gas Supply Pressure

Fig. 13: Sediment Trap Orientation

CAUTION: Do not use Teflon tape on gas line pipe

Gas Pressure Regulator

thread. A pipe compound rated for use with gas

The gas valve pressure regulator(s) on the heater are

systems is recommended. Apply sparingly only on

male pipe ends.

nominally preset at 3 in. WC for natural gas, and 10.0

in. WC for propane gas manifold pressure. The pres-

CAUTION: Support gas supply piping with

sure at the gas valve outlet tap, measured with a

hangers, not by the heater or its accessories. Ensure

manometer, while in operation should be as indicated

the gas piping is protected from physical damage

in Table G. If an adjustment is needed, turn the adjust-

and freezing where required.

ment screw clockwise to increase pressure or

counter-clockwise to decrease pressure.

Gas Supply Pressure

Electrical Power Connections

A minimum of 4 in. WC and a maximum of 10.5 in. WC

upstream gas pressure is required under load and no

Installations must follow these codes:

load conditions for natural gas. A minimum of 11 in.

WC and a maximum of 13 in. WC is required for

· National Electrical Code and any other national,

propane gas. The gas pressure regulator supplied on

state, provincial or local codes or regulations hav-

the heater is for low pressure service. If upstream

ing jurisdiction

pressure exceeds 14 in. WC, an intermediate gas

· Safety wiring must be N.E.C. Class 1

pressure regulator, of the lockup type, must be

· Heater must be electrically grounded as required

installed.

by N.E.C.

When connecting additional gas utilization equipment

· In Canada, C22.1

to the gas piping system, the existing piping must be

The heater is wired for 120 VAC, less than 12 AMPS.

checked to determine if it has adequate capacity.

The voltage is indicated on the tie-in leads. Consult the

Gas Type

wiring diagram shipped with the heater in the instruc-

Firing

Gas Valve

Natural

LP/Propane

tion packet. The remote tank control stat, thermostat,

Stage

+/- 0.1"WC

+/- 0.1"WC

or electronic heater control as applicable, may be con-

nected to stage selector terminal (See wiring diagram).

Hi-Fire

Invensys

3.3" WC

24 Volts are supplied to this connection through the

Honeywell or

3.1" WC

9.6" WC

heater transformer. DO NOT attach line voltage to

White-Rodgers

the stage connections. Before starting the heater

Invensys

1.2" WC

check to ensure proper voltage to the heater and

Lo-Fire

pump.

Honeywell or

1.4" WC

3.6" WC

WARNING: Connecting line voltage to the stage

White-Rodgers

connection terminal block will cause damage to the

unit that is not covered by warranty.

Table

G: Pressure at

Gas Valve

Outlet Tap

18