Carrier 140/E Series Installation, Start--Up, Operating, And Service And Maintenance page 20

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115-VOLT FIELD-
SUPPLIED
FUSED
DISCONNECT
.... FIELD 24-VOLT WIRING
.... FIELD 115-, 208/230-, 460-VOLT WIRING
-- FACTORY 24-VOLT WIRING
FACTORY 115-VOLT WIRING
NOTE 2
_ , <j .zl ,<1 _.u. ,.._ I i(_ i(_) t @t 1"STAGE
FIVE THERMOSTAT FIELD-SUPPLIED
WIRE _l ! i i ! ! TERM NALS FUSED DISCONNECT
T HREE-WIRE
HEATING-
ON LY
I I I I
@
O
JUNCTION @'
BOX (_
CONTROL
BOX (_-
24-VOLT
TERMINAL
BLOCK
I I I I
L I [ [
"i-- i i
-.4 ..... 4-- .... 4-----b------
[ I I I
[ I I I
7-..... i I I '
NOTEI
l J 1
I I
i i !
J I L -t_-----
I
J m,-,
FURNACE
208/230- OR
460-VOLT
PHASE
=-__---1208/230-
=_.L_rTTL____LVOLT
r _'u - -I (SINGLE
--_---_.--.._--- JPHASE
I -GNDI
CONDENSING
UNIT
NOTES: 1. Connect Y/Y2-terminal as shown for proper operation.
2. Some thermostats require a "C" terminal connection as shown.
3, If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire,
Fig. 23 - Field Wiring Diagram
A95236
A 1/8-in. (3 ram) 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
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.
If pressure exceeds 0.5 psig (14-In. W.C.), gas supply pipe nmst
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.
ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
iniury or death.
Blower access panel door switch opens l15-v power to
control. No component operation can occur. Do not bypass
or close switch with panel removed.
See Fig. 23 for field wiring diagram showing typical field 115-v
wiring. Check all factory and field electrical connections for
tightness.
Field-supplied wiring shall conform with the linfitations of 63 °F
(33 ° C) rise.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal
iniury, death, or property damage.
The cabinet MUST have an uninterrupted or unbroken
ground according to NEC ANSI/NFPA 70-2008 or local
codes to nfininfize personal iniury if an electrical fault
should occur. This may consist of electrical wire, conduit
approved for electrical ground or a listed, grounded power
cord (where pernfitted by local code) when installed in
accordance with existing electrical codes. Refer to the
power cord manufacturer's ratings for proper wire gauge.
Do not use gas piping as an electrical ground.
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in internfittent
furnace operation,
Furnace control must be grounded for proper operation or
else control will lock out. Control nmst remain grounded
through green/yellow wire routed to gas valve and manifold
bracket screw,
l15-V WIRING
Verify that the voltage, frequency, and phase correspond to that
specified on unit rating plate. Also, check to be sure that service
provided by utility is sufficient to handle load imposed by this
equipment. Refer to rating plate or Table 7 for equipment
electrical specifications.
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