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Gas supply connections, Gas pressure, Water connections & system piping – Raypak RAYTHERM 0135B User Manual

Page 15

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15

Gas Supply Connections

The inlet gas connection of the boiler gas valve is 1/2".

Provide an adequate gas piping supply line no smaller

than 1/2", according to Table H above.

Gas piping must have a sediment trap ahead of the

boiler gas controls, and a manual shut-off valve locat-

ed outside the jacket. All gas piping should be tested

after installation in accordance with local codes.

Model

No.

1/2 in. Pipe 3/4 in. Pipe 1 in. Pipe 1 1/4 in. Pipe

Nat. Pro. Nat. Pro. Nat. Pro. Nat.

Pro.

0042

125

350

500

0066

60

160

175

460

0090

30

80

125

300

400

0135

15

40

60

150

200 450

0180

20

35

90

115 300

425

Table H: Maximum Equivalent Pipe Length (Feet)

Sediment Trap

Gas Valve

Manual

Union

Valve

Fig. 14: Sediment Trap

CAUTION: The boiler and its manual shut-off valve

must be disconnected from the gas supply during

any pressure testing of that system at test pressures

in excess of 1/2 psi (3.45 kPa). Dissipate test

pressure in the gas supply line before reconnecting

the boiler and its manual shut-off valve to gas supply

line. FAILURE TO FOLLOW THIS PROCEDURE

MAY DAMAGE THE GAS VALVE. OVER

PRESSURED GAS VALVES ARE NOT COVERED

BY WARRANTY. The boiler and its gas connections

shall be leak tested before placing the appliance in

operation. Use soapy water for leak test. DO NOT

use open flame.

NOTE: Do not use teflon tape on gas line pipe

thread. A flexible sealant suitable for use with Natural

and Propane gases is recommended.

These boilers are also certified to operate on propane

gas, when equipped with the combination gas valve

and orifices (pilot and main burners) sized for propane

gas.

Gas Pressure

The gas valve is provided with pressure taps to meas-

ure gas pressure upstream of the gas valve and

downstream which is the same as the manifold pres-

sure.

Water Connections & System

Piping

The pipe size for water connections is shown on page

6. Typical piping systems are shown on pages 17 to

19.

This boiler is supplied with a circulator and built-in

bypass as standard to ensure the required minimum

water flow in the boiler. The bypass on models H-0135

and H-0180 is provided with an adjustable valve that is

factory-set in the full open position. The handle is

Gas Type

Inches

WC Min.

Inches

WC Max.

Regulator

Setting

Natural

7.0

10.5

3.5

Propane

12.0

13.0

11.0

Table I: Minimum and Maximum Gas Pressure

Must be Supplied by Installer

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