GAS PIPING

GAS INLET

TRAP

FIG. 34 Gas Line Connection to Unit with Sediment Trap and Manual Main Gas Shut-off Valve

All gas connections must be made with pipe joint compound resistant to the action of liquefied petroleum and natural gas. All piping must comply with local codes and ordinances. Tubing installations must comply with approved standards and practices.

Install Piping to Control

1. The

gas

line should

be

a

separate line direct

from

the

meter unless

the

existing

gas

line is

of

sufficient

capacity.

Verify

pipe

size

with your

gas

supplier.

 

 

 

 

 

 

 

2.Use new, properly threaded black iron pipe free

from

chips.

If tubing is

used,

make

sure the

ends

are

square, deburred and

clean.

All

tubing

bends

must be smooth and without deformation.

Avoid

flexible gas

connections.

Internal

diameter of

flexible gas lines may not provide

appliance

with

proper volume of gas.

 

 

 

 

3.Install a manual main gas shutoff valve at the units

 

gas

inlet,

outside

of the appliance

and

before

the

 

gas

valve.

Install

a

union

at the appliance

gas

 

line

connection

for

ease

of

service

and

removal

of

 

the gas train.

 

 

 

 

 

 

 

 

 

4.

Run

pipe

or tubing

to the units gas inlet.

If

tubing

 

is used, obtain

a

tube

to

pipe

coupling

to

connect

 

the tubing to the units gas inlet.

 

 

 

 

 

 

5.

Install a

sediment

trap in the supply line

to

the

 

units gas inlet. (see Figure 34).

 

 

 

 

 

 

6.Remove seal over gas inlet to the appliance.

7.Apply a moderate amount of good quality pipe compound (DO NOT use Teflon tape) to pipe only, leaving two end threads bare.

8.Connect gas pipe to inlet of appliance. Use wrench to support gas manifold on the appliance.

9.For LP gas, consult your LP gas supplier for expert installation.

GAS MANIFOLD

PRESSURE ADJUSTMENT

The manifold gas pressure on the Intelli-Fin appliance is not field adjustable. The ratio gas valve has been factory set with an internal bias adjustment to ensure a 1:1 air/gas ratio on operation. Tampering with this adjustment will void the warranty on the gas valve assembly and the burner. An Intelli-Fin supplied with a properly sized gas line, properly sized meter and a minimum of 4 inch water column of gas supply pressure while firing at full rate will ensure full burner input. The manifold pressure supplied to the burner is a differential pressure. This pressure is the result of the difference in two gas pressure measurements. A differential manifold gas pressure measurement should not be made until you have measured the gas supply pressure. Gas supply pressure must be a minimum of 4 inch water column with all appliances on the gas line firing at full rate before a manifold pressure measurement is made. Use the following procedure to check gas supply pressure with a manometer connected to the inlet pressure tap on the gas line connection at the rear of the appliance.

CHECKING GAS SUPPLY PRESSURE

FIG. 35 Gas Supply Pressure Measurement

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Lochinvar 000 through 2, 1 warranty GAS Piping, GAS Manifold Pressure Adjustment, Checking GAS Supply Pressure

000, 000 through 2, 1 specifications

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