Lochinvar RSB-i&s-05 Gas Supply, Gas Pressure Test, Table - C, Gas Connection, Table - D, LP Gas

GAS SUPPLY

GAS PRESSURE TEST

Verify that the appliance is supplied with the type gas

1. The appliance must be disconnected from the

specified on the rating plate. This appliance is orificed

gas supply piping system during any pressure

for operation up to 2000 feet altitude. The appliance

testing

of

that

system

at

a

test

pressure in

will be derated 4% per 1000 feet above 2000 feet eleva-

excess of 1/2 PSIG (3.5kPa).

tion. Consult the factory for installations above 2000

2.

The appliance must be isolated from the gas

feet elevation. Field conversions for operation at high

supply

piping

system

by

closing

a

manual

altitude must be performed by certified personnel only.

shutoff

valve

during

any

pressure

testing

The appliance will be marked to indicate suitability for

high altitude operation.

of the

gas supply piping

system

at test

GAS SUPPLY PRESSURE: Measured

at

the inlet

pressures

equal to

or

less

than

1/2 PSIG

(3.5kPa).

pressure tap located upstream of the combination gas

valve(s) see Figures 20 - 22, page 17.

3.

The

appliance and its gas connection must

be leak-tested before placing it in operation.

TABLE - C

GAS SUPPLY PRESSURE

GAS CONNECTION

Nat. Gas

LP Gas

1.

Safe

operation of

the

appliance

requires

properly sized

gas

supply

piping.

See data

Max. (Inches Water Column)

10.5

13

in Table E.

Min. (Inches Water Column)

*4.5

11

2.

Gas

pipe

size

may

be

larger than

appliance

Min. (Inches Water Column)

**5.0

11

gas connection.

*Models 45,000 - 360,000 Btu/hr Only

3.

Installation of

a union

is

suggested

for ease

**Models 399,999 - 500,000 Btu/hr Only

of service, see Figure 16 on page 14.

Maximum inlet gas pressure must not exceed the value

4.

Install

a

manual main

gas

shutoff valve,

outside

of

the

appliance

gas

connection and

specified. Minimum value listed is for the purposes of

before the gas valve or manifold connection,

input adjustment.

MANIFOLD PRESSURE: Measured at the pressure

when local codes require.

tap on the downstream side of the combination gas

5.

A trap (drip leg) MUST be provided by the

valve(s) (see Figures 20 - 22 on page 17). The gas

installer in the inlet of the gas connection to the

regulator settings for single stage and two stage

appliance, see Figure 16 on page 14.

operation

are

factory

set

to supply

proper

manifold

6.

The

combination gas

valve

has

an

integral

pressure

for

normal

operation.

To

check

manifold

vent

limiting

device

and

does

not

require

pressure, see Manifold Adjustment Procedure. Do not

venting to atmosphere, outside the building.

increase manifold pressure beyond specified

pressure settings shown below in Table D.

TABLE - D

MANIFOLD PRESSURE

Single and Two-Stage

Two Stage

Btu/hr

Full or High Fire Settings

Low Fire Settings

Input Gas

Natural Gas

L.P. Gas

Natural Gas

L.P. Gas

45,000

3.5"

10"

0.9"

2.5"

75,000

2.4"

7"

0.9"

2.5"

90,000 - 180,000

3.5"

10"

0.9"

2.5"

199,999

2.9"

7.5"

0.9"

2.5"

215,000 - 399,999

3.5"

10"

0.9"

2.5"

500,000

3.5"

10" (two valves)

N/A

N/A

12