Alliance Laundry Systems JT30XG Manual De Instalación, Operación, Mantenimiento Y Seguridad página 36

Example of Gas Loop Piping
For 170 Pound Tumblers
MPORTANT: 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.
MAIN
REGULATOR
GAS
METER
IMPORTANT: Line pressure must be maintained at 7" ± 1" water column inches (1.74 ± .23 kPa) for Natural Gas (11 ± .3 water
column inches [2.74 ± .07 kPa] 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.
Example of Gas Supply Piping
For 170 Pound Tumblers
GAS
FURNACE
(120,000 BTU/HR.)
GAS
MAIN
METER
REGULATOR
SAMPLE CALCULATIONS:
Equivalent Length = Total length of main gas supply pipe from
the gas meter to the far end of the tumbler dryers.
= 25' + 19' (7.6 m + 5.8 m)
= 44' (13.4 m) Total Gas Line
Using the table in Table 3, the main supply pipe diameter should be 3-1/2" (8.9 cm).
34
GAS WATER
HEATERS
PRESSURE
REGULATOR
(If required)
GAS WATER
HEATERS
(400,000 BTU/HR. each)
25' (7.6 m)
© Published by permission of the copyright owner – DO NOT COPY or TRANSMIT
GAS SPACE HEATER
GAS
SHUT-OFF
VALVES
NOTE: Minimum pipe size to
tumbler is 1" (2.5 cm)
Figure 11
(70,000 BTU/HR. each)
PRESSURE
REGULATOR
Total BTU/HR = The sum of the BTU/HR. of all
Figure 12
TUMBLERS
T034IE3F
GAS SPACE
HEATERS
GAS TUMBLER DRYERS
(395,000 BTU/HR. each)
1 2 3 4 5 6 7 8
19' (5.8 m)
19' (5.8 m)
tumblers being fed by the main
gas supply pipe.
= 9 x 395,000
= 3,555,000 BTU/HR.
GAS
LINE
PRESSURE
TAP
1" (2.5 cm)
PIPE
GAS LOOP
9
T035IE3G
M414670