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59TN6C: Installation, Start-up, Operating, Service and Maintenance Instructions
SMACNA construction standard on fibrous glass ducts. Both acoustical
lining and fibrous ductwork shall comply with NFPA 90B as tested by
UL Standard 181 for Class 1 Rigid air ducts.
NOTE: For horizontal applications, the top most flange may be bent
past 90_ to allow the evaporator coil to hang on the flange temporarily
while the remaining attachment and sealing of the coil are performed.
GAS PIPING
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Never purge a gas line into a combustion chamber. Never test for gas
leaks with an open flame. Use a commercially available soap solution
made specifically for the detection of leaks to check all connections. A
fire or explosion may result causing property damage, personal injury
or loss of life.
Use proper length of pipe to avoid stress on gas control manifold and
gas valve.
Gas valve inlet and/or inlet pipe must remain capped until gas supply
line is permanently installed to protect the valve from moisture and
debris. Also, install a sediment trap in the gas supply piping at the inlet
to the gas valve.
CAUTION
!
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in furnace damage.
Connect gas pipe to furnace using a backup wrench to avoid damaging
gas controls and burner misalignment.
!
In the state of Massachusetts:
1.
Gas supply connections MUST be performed by a licensed
plumber or gas fitter.
2.
When flexible connectors are used, the maximum length shall
not exceed 36 in. (915 mm).
3.
When lever handle type manual equipment shutoff valves are
used, they shall be T-handle valves.The use of copper tubing for
gas piping is NOT approved by the state of Massachusetts.
Gas piping must be installed in accordance with national and local
codes. Refer to current edition of NFPA 54/ANSI Z223.1 in the U.S.A.
Refer to current edition of NSCNGPIC in Canada.
Installations must be made in accordance with all authorities having
jurisdiction. If possible, the gas supply line should be a separate line
running directly from meter to furnace.
NOTE: Use a back-up wrench on the inlet of the gas valve when
connecting the gas line to the gas valve.
The gas supply pressure shall be within the maximum and minimum
inlet supply pressures marked on the rating plate with the furnace
burners ON and OFF.
Gas entry can be from left or right side, or top panel. See
Fig.
31.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
NOTICE
Fig. 30
Left Side Gas Entry. Gas Pipe
Grommet Required For Direct
Vent Applications.
Fig. 31 – Alternate Gas and Electric Entry
NOTE: Top plate may be field drilled for alternate gas and 115 VAC
electric entry.
Refer to
Table 10
for recommended gas pipe sizing. Risers must be used
to connect to furnace and to meter. Support all gas piping with
appropriate straps, hangers, etc. Use a minimum of one hanger every 6
ft. (2 M). Joint compound (pipe dope) should be applied sparingly and
only to male threads of joints. Pipe dope must be resistant to the action
of propane gas.
Table 10 – Maximum Capacity of Pipe
Nominal:
1/2 (12.7) 3/4 (19.0)
Actual ID:
0.622
Length (ft)
172
10 (3.0)
118
20 (6.0)
95
30 (9.1)
40 (12.1)
81
50 (15.2)
72
NOTE: Cubic ft. of natural gas per hr for gas pressures of 0.5 psig
(14-in. w.c.) or less and a pressure drop of 0.5-in. w.c. (based on a 0.60
specific gravity gas). Ref: Chapter 6 current edition of NFPA 54/ANSI
Z223.1.
Gas Pressure
Maximum
Minimum
When a flexible connector is used, black pipe shall be installed at the
furnace gas control valve and extend a minimum of 2-in. (51 mm)
outside the furnace.
For direct vent (2-pipe) applications, seal the gas pipe opening to prevent
air leakage.
Remove the required knockout or plug. Install the grommet in the
opening. Then insert the gas pipe. The grommet is included in the loose
and
parts bag.
Piping should be pressure and leak tested in accordance with the current
addition of the NFPA 54/ANSI Z223.1 in the United States, local, and
national plumbing and gas codes before the furnace has been connected.
23
Gas Pipe Grommet Required
For Direct Vent Applications
Fig. 30 – Gas Entry
1-1/4
1 (25.4)
(31.8)
0.824
1.049
1.380
Capacity in Cubic Feet of Gravity
360
678
1390
247
466
957
199
374
768
170
320
657
151
284
583
Natural (in W.C.)
Propane (in W.C.)
13.8
4.5"
A11338
A230050
1-1/2
(38.1)
1.610
2090
1430
1150
985
873
12"
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