Maximum Capacity Of Pipe - International comfort products A Series Installation Instructions Manual

WARNING
!
FIRE OR EXPLOSION HAZARD
A failure to follow this warning could result in personal
injury, death, and/or property damage.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously served another gas
appliance. Black iron pipe shall be installed at the furnace
gas control valve and extend a minimum of 2- -in. (51 mm)
outside the furnace.
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.
An accessible manual equipment shutoff valve MUST be installed
external to furnace casing and within 6 ft. (2 M) of furnace.
Install a sediment trap externally in the riser leading to furnace
(Fig. 37). Connect a capped nipple into lower end of tee. Capped
nipple should extend below level of furnace gas controls. Place a
ground joint union between furnace gas control valve and exterior
manual equipment gas shutoff valve.
A 1/8- -in. (3 mm) NPT plugged tapping, accessible for test gauge
connection, MUST be installed immediately upstream of gas
supply connection to furnace and downstream of manual
equipment shutoff valve.
Piping should be pressure and leak tested in accordance with the
current edition of the NFGC in the United States, local, and
national plumbing and gas codes before the furnace has been
connected. After all connections have been made, purge lines and
check for leakage at furnace prior to operating furnace.
NOTE: The furnace gas control valve inlet pressure tap
connection is suitable to use as test gauge connection providing
test pressure DOES NOT exceed maximum 0.5 psig (14- -in. w.c.)
stated on gas control valve (Fig. 60).
If pressure exceeds 0.5 psig (14- -in. w.c.), gas supply pipe must be
disconnected from furnace and capped before and during supply
pipe pressure test. If test pressure is equal to or less than 0.5 psig
(14- -in. w.c.), turn off electric shutoff switch located on furnace gas
control valve and accessible manual equipment shutoff valve
before and during supply pipe pressure test. After all connections
have been made, purge lines and check for leakage at furnace prior
to operating furnace.
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 (Fig. 35 and
Fig. 36).
Gas Pipe Grommet
For direct vent (2-pipe) applications, the knockout for the gas pipe
must be sealed to prevent air leakage. Remove the knockout, install
the grommet in the knockout, then insert the gas pipe. The
grommet is included in the loose parts bag (Fig. 35).
24
NOMINAL
IRON PIPE
SIZE
IN. (MM)
1/2 (13)
3/4 (19)
1 ( 25)
1-1/4 (32)
1-1/2 (39)
* Cubic ft of 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: (Table 12) and 6.2 of NFPA54/ANSI Z223.1 (current edition).
NOTE: Top plate may be field drilled for alternate gas and
115 VAC electric entry
MANUAL
SHUT OFF
VALVE
(REQUIRED)
Specifications subject to change without notice.
Table 12 – Maximum Capacity of Pipe
LENGTH OF PIPE --- FT (M)
10 20
(3.0) (6.0) (9.1)
175 120
360 250 200
680 465 375
1400 950 770
2100 1460 1180
Fig. 35 - - Gas Entry
1 1/2 inch for Gas
7/8 inch for 115 VAC Electric
Fig. 36 - - Alternate Gas and Electric Entry
GAS
SUPPLY
NOTE: Union may be inside the
UNION
vestibule where permitted by
SEDIMENT
local codes.
TRAP
Fig. 37 - - Typical Gas Pipe Arrangement
30 40 50
(12.1) (15.2)
97 82 73
170 151
320 285
660 580
990 900
A190265
A170125
FRONT
A11035
440 01 4601 01