Natural gas input rating check – Sears 9MPD User Manual
Page 32
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
FigurH 30
Typical Gas Piping for Downflow
Use elbows and 3" pipe nipple to connect valve
to piping when using left side gas pipe entry.
LP Low pressure
switch. Optional LP
conversion.
Drip Leg and Union, Union* should be outside
the cabinet. Manual shut-off valve MUST be
upstream of dripleg, union, and furnace.
Gas Pipe Grommet
‘Union may be installed inside the cabinet when necessary
(Single Pipe)
because of clearances.
25-23-39
Natural Gas Input Rating Check
NOTE: The gas meter can be used to measure input to furnace.
Rating is based on a natural gas BTU content of 1,000 BTU's per
cubic meter. Check with gas supplier for actual BTU content.
1. Makesureburnercompartmentdoorisinplace beforeper
forming the following steps.
2. Turn OFF gas supply to all appliances and start furnace.
Example
Natural Gas
No. of Seconds
Time Per Cubic
BTU Per
BTU Content
Per Hour
Foot in Seconds
Hour
1,000
3,600
48
75,000
1,000
X
3,600 + 48 = 75,000 BTUH
3. Time how many seconds it takes the smallest dial on the
gas meter to make one complete revolution. Refer to
Ex
ample.
Ì32l
44001
1114
00