Electrical Connections; Maximum Capacity Of Pipe; Removing Bottom Closure Panel; Typical Gas Pipe Arrangement - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

Z FRONT FILLER
PANEL
BOTTOM
CLOSURE
PANEL
A93047
Fig. 26--Removing Bottom Closure Panel
Tab{e 3--Maximum Capacity of Pipe*
INTERNAL
DRAMETER
(IN.)
0.622
0.824
1.049
1.380
1.610
Cubic ft of gas per hr for gas
a pressure drop of 0.5-in. wc
Table 9-2 NFPA 54-2002
LENGTH OF PIPE (FT)
10 20 30 40 50
175 120 97 82 73
360 250 200 170 151
680 465 375 320 285
1400 950 770 660 580
2100 1460 1180 990 900
_ressures of 05 psig(14-in, wc) orless, and
based on a 0.60 specific gravity gas)Ref:
NOMINAL
IRON
PiPE
SRZB
(IN.)
1/2
3/4
1
1-1/4
1-112
--F FIRE OR EXPLOSION HAZARD
Failure to %l]ow this warning could result in fire, explosion,
personal injury, or death
Connect gas pipe to f_lmace using a backup wrench to avoid
damaging gas controls
Gas valve shutoff switch MUST be f_lcing fbp, vard or tilted
upward
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
Use proper length of pipe to avoid stress on gas control
manifbld
- If a flexible connector is required or allowed by authori V
having jurisdiction, black iron pipe shall be installed at
t\u'nace gas valve and extend a mininmm of 2 in. outside
furnace casing.
Install a sediment trap in riser leading
to _lmace.
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 contlols. Place a ground joint union between gas
control manifold and manual gas shutoff valve. (See Fig 27.)
GAS
SUPPLY
MANUAL _/ ]]
IR 00,R 0 f
A93324
Fig. 27--Typica! Gas Pipe Arrangement
An accessible manual shutoff valve MLST be installed external to
ft_rnace casing and within 6 ft of _i_rnace. A 1i8oin. NPT plugged
tapping, accessible _br test gauge connection, MUST be installed
immediately upstream of gas supply connection to ftlrnace and
downstleam of manual shutoff valve.
NOTE: The gas valve inlet pressure tap connection is suitable to
use as test gauge connection providing test pressure DOES NOT
exceed maximum 05 psig (14oin wc) stated on gas valve (See
Fig 62.)
Piping should be pressure and leak tested in accordance with
NFGC in the United States or NSCNGPIC in (anada, local, and
national plumbing and gas codes before the furnace has been
connecte& If pressure exceeds 05 psig (14oin wc), gas supply
pipe must be disconnected fiom ftmaace and capped be_bre
pressure test
If test pressure is equal to or tess than 05 psig ( 14oin wc), turn off
electric shutoff switch located on gas valve before test. It is
recommended that ground joint union be loosened before pressure
testing. After all connections have been made, purge lines and
check for leakage at furnace prior to placing it into service.
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate with
the t_/mace burners ON at HI-HEAT and OFF.
Step 8--Electrical Connections
See Fig 28 for field wiring diagram showing typical field 115-v
and 24-v wiring Check all I:_cto_- and field etectIical connections
for tightness
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Blower access door switch opens 115-v power to furnace
contlol. No component operation can occur. Do not bypass or
close switch with panel removed.
2O