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Alliance Laundry Systems Stacked Drying Tumbler User Manual

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© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Installation Instructions
21
M412060
Gas Requirements (continued)
Example Of Gas Supply Piping
Figure 8
Figure 9
Gas 
Furnace
Gas 
Water 
Heaters
Gas Space 
Heaters
Gas
Meter
IMPORTANT: Line pressure must be maintained at 6-1/2 ± 1-1/2 water 
column inches for Natural Gas (10 ± 1-1/2 water column inches for L.P. Gas) 
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 pressure with all gas appliances firing.
NOTE: Minimum pipe size to 
tumbler is 1/2 inch (1.27 cm).
Tumblers
Gas 
Line 
Pressure 
Tap
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.
EXAMPLE:
Gas Shut-Off 
Valves
TMB2159N
SAMPLE CALCULATIONS:
Equivalent Length
=
Total length of main gas supply pipe from the 
gas meter to the far end of the tumbler dryers
=
25 ft + 19 ft (7.62 meters + 5.79 meters)
= 
44 ft (13.41 meters)
Total BTU/HR
=
The sum of the BTU/HR of all tumblers being 
fed by the main gas supply pipe
= 
18 x 75,000
=
1,350,000
Using the table in Figure 7, the main supply pipe diameter should be 
2-1/2 in (6.35 cm).
Gas Furnace 
(120,000 BTU/HR)
Gas Water 
Heaters
(400,000 
BTU/HR each)
Gas Tumbler 
Dryer (75,000 
BTU/HR per 
cylinder)
Gas 
Meter
25 ft (7.62 meters)
Pressure 
Regulator
19 ft (5.79 meters)
Gas Space Heaters
(70,000 BTU/HR 
each)
TMB2160N