Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual page 23

BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
BLOWER SPEED
SELECTION TERMINALS
→
FURNACE
NOT IN
HORIZONTAL
SECTION
Fig. 32—Combustion-Air and Vent Pipe Diameter
Transition Location and Elbow Configuration
local code, the current edition of the NFGC or NSCNGPIC, and
the vent or liner manufacturer's installation instructions. Care must
be taken to prevent the exhaust gases from one appliance from
contaminating the combustion air of other gas appliances.
When vent pipe is exposed to temperatures below freezing,
such as when it passes through an unheated space or when a
chimney is used as a raceway, pipe must be insulated as
shown in Table 8 with Armaflex-type insulation.
TWINNING AND/OR
COMPONENT TEST
BLOWER OFF-DELAY
TEST/TWIN
HUM
0.5 AMP@24VAC
FUSE 3-AMP
SEC-2 SEC-1
EAC-2 L2
COOL
HEAT
FAN
SPARE-1 SPARE-2 EAC-1
SPARE-1
SPARE-2 FAN
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 31—Control Board
PIPE DIAMETER
TRANSITION IN
VERTICAL SECTION
A93034
TERMINAL
1-AMP@
PR-1
115VAC
PL2 1
115 VAC (L1) LINE
VOLTAGE CONNECTION
NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
AIR
FLOW
COMBUSTION-
AIR
VENT
UPFLOW
COMBUSTION-
AIR
AIR
FLOW
HORIZONTAL-LEFT DISCHARGE
Fig. 33—Combustion-Air and Vent Pipe
23
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER 24-VAC
CONNECTIONS
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
NOTE: Select 1 vent pipe connection and
1 combustion-air pipe connection.
COMBUSTION-
AIR
VENT
VENT
COMBUSTION-
AIR
FLOW
DOWNFLOW
VENT
HORIZONTAL-RIGHT DISCHARGE
Connections
A02142
VENT
COMBUSTION-
AIR
AIR
COMBUSTION-
AIR
VENT
AIR
FLOW
A96187