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

115-VOLT
SINGLE
PHASE
115-VOLT FIELD-
SUPPLIED
FUSED
DISCONNECT
VOLTS—
UNIT
HERTZ—
SIZE
PHASE
Maximum*
040-14 115—60—1
060-14 115—60—1
080-14 115—60—1
→080-20
115—60—1
100-20 115—60—1
→120-20
115—60—1
* Permissible limits of voltage range at which unit will operate satisfactorily.
† Unit ampacity = 125 percent of largest operating component's full load amps plus 100 percent of all other potential operating components' (EAC, humidifier, etc.) full
load amps.
‡ Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay fuse is recommended.
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.
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. 46.)
Piping should be pressure tested in accordance with local and
national plumbing and gas codes before furnace has been attached.
In Canada, refer to current edition of NSCNGPIC. If pressure
exceeds 0.5 psig (14-in. wc), gas supply pipe must be disconnected
from furnace and capped before pressure test. If test pressure is
equal to or less than 0.5 psig (14-in. wc), close manual shutoff
valve located on gas valve before test. It is recommended that
ground joint union be loosened before pressure testing. After all
NOTE 5
FIVE
WIRE
THREE-WIRE
HEATING
ONLY
W/W1
NOTE
W2
R
G
AUXILIARY
J-BOX
C
Y/Y2
FURNACE
24-VOLT
CONTROL
TERMINAL
CENTER
BLOCK
Fig. 22—Heating and Cooling Application Wiring Diagram
Table 3—Electrical Data
OPERATING
MAXIMUM
VOLTAGE RANGE
UNIT
AMPS
Minimum*
127 104 8.9
127 104 8.9
127 104 8.9
127 104 13.8
127 104 13.8
127 104 11.2
THERMOSTAT
W C R G Y
TERMINALS
3
NOTE 1
CONDENSING
TWO WIRE
NOTES:
1. Connect Y or Y/Y2 terminal as shown for proper cooling operation.
2. Proper polarity must be maintained for 115-volt wiring.
3. Use W2 with 2-stage thermostat when zoning.
4. If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
5. Some thermostats require a "C" terminal connection as shown.
MINIMUM
UNIT
WIRE
AMPACITY†
SIZE
12.0 14
12.0 14
12.0 14
17.9 12
18.1 12
14.7 14
connections have been made, purge lines and check for leakage.

ELECTRICAL CONNECTIONS

See Fig. 22 for field wiring diagram showing typical field 115-v
and 24-v wiring. Check all factory and field electrical connections
for tightness.
→
Blower access panel door switch opens 115-v power to
control center. No component operation can occur. Do not
bypass or close switch with panel removed. Failure to follow
this warning could result in personal injury or death.
Furnace control must be grounded for proper operation or
control will lock out. Control is grounded through green wire
routed to gas valve and burner box screw.
Step 1—115-v Wiring
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on unit
17
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-, 208/230-, 460-VOLT WIRING
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-VOLT
THREE
PHASE
GND
GND
208/230-
VOLT
SINGLE
PHASE
GND
GND
UNIT
MAXIMUM WIRE MAXIMUM FUSE OR
LENGTH (FT)‡ CKT BKR AMPS**
31
31
31
32
32
25
A95199
15
15
15
20
20
15