AEG CGA 75 WOK Specifications download pdf (Page 11)

11UH-PRC002-EN

Application

Considerations

High Pressure Regulators —

Natural Gas Only

The Trane indoor gas heating products

contained in this catalog, are designed

to operate at a pressure of 3.5-inch W.C.

(Water Column) when firing on natural

gas. This is the “manifold” pressure or

that which is present at the burner

orifices. All five and six-function valves

provide a built-in pressure regulator

which is capable of reducing “supply”

pressures from a maximum of 14-inch

W.C. (½ psi) down to

3.5-inch W.C. on the leaving side of the

valve. The valve typically “drops” about

1½-inch so the minimum supply

pressure is 5-inch W.C.

Whenever supply pressures exceed

14-inch W.C., a high pressure regulator

should be selected. We supply a

Rockwell regulator which is fitted with

pressure springs and capacity orificing

to meet the requirements of each

specific job.

Table AC-1 — Orifice Chart: Rockwell 043-182 Regulator

Inlet Capacity in MBH for Natural Gas Spring

Pressure 25-200 225-300 350-500 600 700 800 Required

1 psi 3/8” N/A N/A N/A N/A N/A Blue (only)

2 3/8” 3/8” N/A N/A N/A N/A Blue (only)

3 3/8” 3/8” 3/8” N/A N/A N/A Blue or Green

5 3/8” 3/8” 3/8” 3/8” 3/8” 3/8” Blue or Green

10 3/8” 3/8” 3/8” 3/8” 3/8” 3/8” Blue or Green

20 1/4” 1/4” 1/4” 1/4” 1/4” 5/16” Blue or Green

40 1/4” 1/4” 1/4” 1/4” 1/4” 1/4” Blue or Green

60 1/8” 1/8” 1/8” 1/8” 1/8” 3/16” Blue or Green

80 1/8” 1/8” 1/8” 1/8” 1/8” N/A Blue or Green

100 1/8” 1/8” 1/8” 1/8” 1/8” 1/8” Blue or Green

125 1/8” 1/8” 1/8” 1/8” 1/8” 1/8” Blue or Green

In order to select the proper spring/

orifice combination, we need to know

what the supply pressure is on that

particular job and the input size of the

unit being ordered. More than one unit

can be run from one regulator; however,

we recommend that each unit have its

own regulator.

We require that the “job” supply

pressure be included on all jobs

requiring high pressure regulators along

with the unit size. The table that follows

displays the regulators range as it

pertains to inlet pressure and MBh. N/A

requires the customer to contact a local

utility or an industrial supply house.

These devices are not available from

Trane for LP gas. LP accessories must be

secured from the gas supplier/ supply

house.

Minimum/Maximum

Gas Inlet Pressures

Gas valves are suitable to a maximum

inlet pressure of 0.5 psi (14 inches water

column) on natural gas. If the main gas

supply pressure is greater than

14 inches W.C., a step-down pressure

regulator must be field installed ahead of

the gas valve. Minimum inlet pressure for

natural gas units is 5 inches W.C.

For LP (propane) gas, the minimum inlet

pressure is 11.0 inches W.C.

and the maximum inlet pressure is

14.0 inches W.C.

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