Electrical Connections; 115 V Wiring - Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual

TaNe 3--Maximum Capacity of Pipe*
NOMINAL
IRON
PIPE
SmZE
ON.)
I/2
3/4
I
1-1/4
1-1t2
iNTERNAL
DIAMETER
(IN.)
0.622
0.824
1.049
1.380
1.610
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
* Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in wc) or less and a
pressure drop of 0.5-in wc (based on a 060 specific gravity gas).
Ref: Table 9.2 NFGC.
FIRE OR EXPLOSION HAZARD
Failm'e to %llow this wa*ning could result in fire, explosion,
personal inju W, or death
-(onnect gas pipe to 5n'nace using a backup wrench to avoid
damaging gas controls.
-Gas valve shutoff switch MUST be fhcing fbrward or tilted
upward.
-Never pu*ge 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 /'lexible connector is required or allowed by attthori w
having jurisdiction, black iron pipe shall be installed at
fimaace gas valve and extend a mininmm of 2 in outside
furnace casing.
Install a sediment trap in riser leading to fl/mace. Trap can be
installed by connecting a tee to riser leading to t\u'nace so
straight-through section of tee is vertical Then connect a capped
nipple into lower end of tee. (apped nipple should extend below
level of gas controls. Place a ground joint union between gas
control manifold and manual gas shutoff valve. (See Fig 26.)
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.
FIRE OR EXPLOSION HAZARD
Failure to f\fllow the safkty warnings exactly could result in
serious injury, death or property damage
Never test for gas leaks with an open flame. Use a commer-
cially available soap solution made specifically for the
detection of leaks to check all connections A fire or explo°
sion could result causing property damage, personal ir!iury or
toss of life
An accessible manual shutoff valve MUST be installed external to
fl/mace casing and within 6 ft of filmace. A li8°in. NPT plugged
tapping, accessible for test gage connection, MLST be installed
immediately upstream of gas supply connection to furnace and
downstIeam 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 0.5 psig (14-in. wc) stated on gas control valve
(See Fig. 57)
GAS
SUPPLY
MANUAL _/ II
f
A93324
Fig. 26--Typical Gas Pipe Arrangement
Piping should be pressure and leak tested in accordance with
NFG( in the United States or NSCNGPI( in Canada. local, and
national plumbing and gas codes be_;ore the t'urnace has been
connected. After all connections have been made. purge lines and
check for leakage at furnace prior to operating t:urnace.
If pressure exceeds 0.5 psig (14=in. wc), gas supply pipe must be
disconnected from ftlrnace and capped be_bre pressure test If test
pressure is equal to or less than 0.5 psig (14=in. wc), turn off
electIic shutoff switch located on _hrnace gas control valve and
accessible manual shutoff valve before test After all connections
have been made, purge lines and check fbr leakage.
The gas supply pressure shall be within the maximum and
minimum inlet supply pressures marked on the rating plate with
the fl/rnace burners ON and OFF.
Step 8--Electrical Connections
See Fig 27 for field wiring diagram showing typical field 115-v
and 24-v wiring (hock all fhctoo" and field electrical connections
for tightness
Field=supplied wiring shall conform with the limitations of 63_T
(33°(7) rise.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in serious injury or
death
Blower access door switch opens 115-v power to control. No
component operation can occur Do not bypass or close
switch with panel removed
2O
FURNACE MAY NOT OPERATE/PROPERTY
DAMAGE
Failure to %llow this caution may result in fhraace operation
stopping and water pipes freezing during cold weather.
Furnace control must be grounded for proper operation or
control will lock out. (ontrol is grounded through
green yellow wire connected to gas valve and burner box
SCrew,
115 V WIRING
Be_bre proceeding with electrical connections, make certain that
voltage, fi'equency, and phase con'espond to that specified on
furnace rating plate. Also, check to be sure that service provided