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

VOLTS—
UNIT
HERTZ—
SIZE
PHASE
040-08 115-60-1
040-12 115-60-1
060-08 115-60-1
060-12 115-60-1
060-16 115-60-1
080-12 115-60-1
080-16 115-60-1
080-20 115-60-1
100-16 115-60-1
100-20 115-60-1
120-20 115-60-1
140-20 115-60-1
* 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 a measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
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CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance
connected to the venting system being placed into operation
could result in carbon monoxide poisoning or death.
The following steps shall be followed for each appliance
connected to the venting system being placed into operation,
while all other appliances connected to the venting system are
not in operation:
1. Seal any unused openings in venting system.
2. Inspect the venting system for proper size and horizontal
pitch, as required in the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or the CSA B149.1, Natural Gas and
Propane Installation Code and these instructions. Determine
that there is no blockage or restriction, leakage, corrosion and
other deficiencies, which could cause an unsafe condition.
3. As far as 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.
4. Close fireplace dampers.
5. 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 are operating at
maximum speed. Do not operate a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance being
inspected into operation. Adjust the thermostat so appliance is
operating continuously.
7. Test for spillage from draft hood equipped appliances at the
draft hood relief opening after 5 minutes of main burner
operation. Use the flame of a match or candle.
8. If improper venting is observed during any of the above
tests, the venting system must be corrected in accordance with
the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or
CSA B149.1, Natural Gas and Propane Installation Codes.
9. 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-fired burning appliance to their previous
conditions of use.
Vent system or vent connectors may need to be resized. For any
other appliances when resizing vent systems or vent connectors,
Table 4—Electrical Data
OPERATING
MAX
VOLTAGE RANGE
UNIT
AMPS
Max* Min*
127 104
127 104
127 104
127 104
127 104
127 104
127 104 10.0
127 104 14.1
127 104 10.2
127 104 14.8
127 104 14.6
127 104 14.3
UNIT
AMPACITY†
6.1 8.4
7.3 10.0
6.1 8.4
7.1 9.8
9.5 12.8
7.6 10.4
13.4
18.4
13.5
19.3
19.1
18.8
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
Combustion-air and vent pipe, fittings, primers, and solvents must
conform to American National Standards Institute (ANSI) stan-
dards and American Society for Testing and Materials (ASTM)
standards. See Table 6 for approved materials for use in the U.S.A.
In Canada construct all combustion-air and vent pipes for this unit
of CSA or ULC 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.
Furnace combustion-air and vent pipe connections must be at-
tached as shown in Fig. 33. Combustion-air intake plug fitting and
inducer housing alternate vent cap may need to be relocated in
some applications.
NOTE: Slope combustion-air and vent pipes a minimum of 1/4
in. per linear ft with no sags between hangers.
When combustion-air pipe is installed above a suspended
ceiling, pipe must be insulated with 3/8-in. thick Armaflex-
type insulation. Combustion-air pipe should also be insulated
when it passes through warm, humid space.
An abandoned masonry chimney may be used as a raceway for
properly insulated and supported combustion-air and vent pipes.
Each furnace must have its own set of combustion-air and vent
pipes and be terminated individually, as shown in Fig. 42.
Other gas appliances with their own venting system may also use
the abandoned chimney as a raceway providing it is permitted by
21
MIN MAX WIRE
WIRE LENGTH OR CKT BKR
SIZE (FT)‡
14 44
14 37
14 44
14 38
14 29
14 36
14 28
12 31
14 27
12 30
12 30
12 30
MAX FUSE
AMPS**
15
15
15
15
15
15
15
20
15
20
20
20