Alliance Laundry Systems 000 BTU, 105, 250 C.F.M, 80 manual 28

Example of Gas Loop Piping

IMPORTANT: Gas loop piping must be installed as illustrated to equalize gas pressure for all tumblers connected to single gas service. Other gas using appliances should be connected upstream from loop.

GAS SPACE HEATER

MAIN

REGULATOR

GAS

METERGAS WATER HEATERS

GAS

SHUT-OFF

VALVES

PRESSURE	NOTE: Minimum pipe size to
	tumbler is 1/2" (12.7 mm)
REGULATOR
(If required)

TUMBLERS

GAS LINE

PRESSURE TAP

ONE INCH (2.54 cm)

PIPE

GAS LOOP

T034IE3D

IMPORTANT: Line pressure must be maintained at 6-1/2 ± 1-1/2 water column inches (1.62 ± .37 kPa) for Natural Gas

(11 ± .3 water column inches for L.P. Gas) (2.74 ± .07 kPa) with all gas appliances running (tumblers, water heaters, space heaters, furnace, etc.).

An in-line pressure regulator may be required on Natural Gas models if the line pressure exceeds eight water column inches (2.00 kPa) pressure with all gas appliances firing.

Figure 7

Example of Gas Supply Piping

GAS

NOTE: See BTU/HR. rating

on dryer nameplate.

FURNACE

(120,000 BTU/HR.)

GAS WATER

HEATERS

GAS SPACE

(400,000 BTU/HR. each)

HEATERS

GAS

MAIN

(70,000 BTU/HR. each)

METER

REGULATOR

GAS TUMBLER DRYERS

(75,000 BTU/HR. each)

1

2

3

4

5

6

7

8

9

PRESSURE

19' (5.8 m)

25' (7.6 m)

REGULATOR

19' (5.8 m)

SAMPLE CALCULATIONS:

Equivalent Length = Total length of main gas supply pipe from

Total BTU/HR = The sum of the BTU/HR. of all

the gas meter to the far end of the tumbler dryers.

tumblers being fed by the main

= 25' + 19' (7.6 m + 5.8 m) gas supply pipe.

gas supply pipe.

= 44' (13.4 m) Total Gas Liner

= 9 x 75,000

= 675,000 BTU/HR.

TMB1960N

The main supply pipe diameter should be 2" (5.08 cm). Refer to Table 2.

Figure 8

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