Combustion-Air And Vent Piping - Carrier 58MXA Nstallation, Start-Up, And Operating Instructions

115-VAC (L1)
POWER SUPPLY
IGNITOR CONNECTOR
each appliance connected to the venting system placed in opera-
tion, while any other appliances connected to the venting system
are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and horizontal pitch
as required in the National Fuel Gas Code, ANSI Z223.1 or 24
CAN/CGA B149 Installation Codes and these instructions.
Determine that there is no blockage or restriction, leakage,
corrosion, and other deficiencies which could cause an unsafe
condition.
3. In so far as is practical, close all building doors and windows
and all doors between the space in which the appliance(s)
connected to the venting system are located and other spaces
of the building. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust fans,
such as range hoods and bathroom exhausts, so they shall
operate at maximum speed. Do not operate a summer exhaust
fan. Close fireplace dampers.
4. Follow the lighting instructions. Place the appliance being
inspected in operation. Adjust thermostat so appliance shall
operate continuously.
5. Test for draft hood equipped appliance spillage at the draft
hood relief opening after 5 minutes of main burner operation.
Use the flame of a match or candle.
6. After it has been determined that each appliance connected to
the venting system properly vents when tested as outlined
above, return doors, windows, exhaust fans, fireplace damp-
ers, and any other gas-burning appliance to their previous
conditions of use.
TEST/TWIN
SEC-1
3-AMP FUSE
COOL
HEAT
HOT SURFACE
INDUCER MOTOR
CONNECTOR
Fig. 31—Control Center
BLOWER OFF DELAY
ADJUSTMENT SWITCH
24-V THERMOSTAT
G
TERMINALS
R
Y
W
HUMIDIFIER TERMINAL
Com
24V (24-VAC 0.5 AMP MAX)
HUM
LED OPERATION &
DIAGNOSTIC LIGHT
HARNESS CONNECTOR
24-V TRANSFORMER SEC-2
SPARE-1
BLOWER SPEED
SELECTION TERMINALS
SPARE-2
EAC-1 (BLACK)
EAC-ELECTRONIC AIR CLEANER
TERMINALS (115-VAC 1 AMP MAX)
EAC-2 (WHITE)
115-VAC (L2) NEUTRAL
CONNECTION
7. If improper venting is observed during any of above tests, the
venting system must be corrected.
Vent system or vent connectors may need to be resized. For any
other appliances when resizing vent systems or vent connectors,
system or connector must be sized to approach minimum size as
determined using appropriate table found in the NFGC or NSC-
NGPIC.

COMBUSTION-AIR AND VENT PIPING

General
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Combustion-air and vent pipe, fittings, primers, and solvents must
conform to American Standards Institute (ANSI) standards and
American Society for Testing and Materials (ASTM) standards.
See Table 5 for approved materials for use in the U.S.A. and
Canada. In Canada construct all combustion-air and vent pipes for
this unit of CSA or ULC certified schedule-40 PVC, PVC-DWV or
ABS-DWV pipe and pipe cement. SDR pipe is NOT approved in
Canada.
See Table 7 for maximum pipe lengths and Fig. 36, 37, 38, 39, and
40 for exterior piping arrangements.
NOTE: Furnace combustion-air and vent pipe connections are
sized for 2-in. pipe. Any pipe size change should be made outside
furnace casing in vertical pipe. (See Fig. 32.) This allows proper
drainage of vent condensate.
Combustion-air and vent pipes must terminate together in same
atmosphere pressure zone, either through roof or sidewall (roof
termination preferred), using accessory termination kit. See Table
5 for required clearances.
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