Carrier 58MSA Installation, Start-Up, And Operating Instructions Manual page 18

1
17 ⁄ -IN. WIDE
2
CASINGS ONLY:
INSTALL FIELD-SUPPLIED
FILTER FILLER STRIP
UNDER FILTER.
3 "
"
1
24 /
2
1 "
FILTER
SUPPORT
Fig. 21—Bottom Filter Arrangement
FRONT FILLER
PANEL
Fig. 22—Removing Bottom Closure Panel
1
24 ⁄ -IN. WIDE
2
CASINGS ONLY:
CUT AND FOLD
FACTORY-PROVIDED
FILTERS AS SHOWN
TO DESIRED SIZE.
WASHABLE
FILTER
FILTER
RETAINER
A96030
BOTTOM
CLOSURE
PANEL
A93047
Use proper length of pipe to avoid stress on gas control
manifold. Failure to follow this warning could result in a gas
leak resulting in fire, explosion, personal injury, or death.
Table 2—Maximum Capacity of Pipe
(Cu Ft Per Hr)*
NOMINAL
IRON INTERNAL
PIPE DIAMETER
SIZE (IN.)
(IN.)
1/2 0.622
3/4 0.824
1 1.049
1-1/4 1.380
1-1/2 1.610
* For gas pressures of 0.5 psig (14-in. wc) or less, and a pressure drop of
0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table 10-2 NFPA
54-1992.
Install a sediment trap in riser leading to furnace. Trap can be
installed by connecting a tee to riser leading to furnace so
straight-through section of tee is vertical. Then connect a capped
nipple into lower end of tee. Capped nipple should extend below
level of gas controls. Place a ground joint union between gas
control manifold and manual gas shutoff valve. (See Fig. 23.)
If a flexible connector is required or allowed by authority
having jurisdiction, black iron pipe shall be installed at gas
valve and extend a minimum of 2 in. outside furnace casing.
GAS
SUPPLY
MANUAL
SHUTOFF
VALVE
(REQUIRED)
SEDIMENT
TRAP
UNION
Fig. 23—Typical Gas Pipe Arrangement
An accessible manual shutoff valve MUST be installed upstream
of furnace gas controls and within 6 ft of furnace. A 1/8-in. NPT
plugged tapping, accessible for test gage connection, MUST be
installed immediately upstream of gas supply connection to
furnace and downstream of manual shutoff valve.
NOTE: The gas valve inlet press tap connection is suitable to use
as test gage connection providing test pressure DOES NOT exceed
maximum 0.5 psig (14-in. wc) stated on gas valve. (See Fig. 40.)
Piping should be pressure tested in accordance with local and
18
LENGTH OF PIPE (FT)
10 20 30 40
175 120 97 82
360 250 200 170
680 465 375 320
1400 950 770 660
2100 1460 1180 990
A93324
50
73
151
285
580
900