Sidewall Venting; Start-Up, Adjustment, And Safety Check; General; Start-Up Procedures - Carrier 58CTA Installation And Service Instructions Manual

→ Fig. 50—Hammer and Screwdriver Used for
Knockout
the preferred method is to use a hammer and screwdriver to strike
a sharp blow (See Fig. 50.) directly to the knockout tie points or
use a hammer in the upper left corner of the desired knockout. (See
Fig. 51.) Remove all burrs and sharp edges.
→
BURN HAZARD
Vent pipe is HOT and may cause personal injury. Hot vent
pipe is within reach of small children when installed in
downflow position.
See the following instruction.
An accessory Vent Guard Kit, KGAVG0101DFG is REQUIRED
for downflow applications for use where the vent exits through the
lower portion of the furnace casing door. Refer to the Vent Guard
Kit Instructions for complete details.
The horizontal portion of the venting system shall slope upwards
not less than 1/4-in. per linear ft (21 mm/m) from the furnace to the
vent and shall be rigidly supported every 5 ft or less with metal
hangers or straps to ensure there is no movement after installation.

SIDEWALL VENTING

This furnace is not approved for direct sidewall horizontal venting.
→
In the U.S.: Per section 10.3.4 of the NFGC, any listed mechanical
venter may be used, when approved by the authority having
jurisdiction.
→
In Canada: Per section 7.24.2 of the NSCNGPIC, any listed
mechanical venter may be used, when approved by the authority
having jurisdiction.
Select the listed mechanical venter to match the Btuh input of the
furnace being vented. Follow all manufacturer's installation re-
quirements for venting and termination included with the listed
mechanical venter.
→ Fig. 51—Remove Knockout with Hammer
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START-UP, ADJUSTMENT, AND SAFETY CHECK

Step 1—General
FIRE HAZARD
Failure to follow this warning could result in a fire and lead
to property damage, personal injury or death.
This furnace is equipped with manual reset limit switches in
the gas control area. The switches open and shut off power to
the gas valve if a flame rollout or overheating condition
occurs in the gas control area. DO NOT bypass the switches.
Correct problem before resetting the switches.
1. Maintain 115-v wiring and ground. Improper polarity will
result in rapid flashing LED and no furnace operation.
2. Make thermostat wire connections at the 24-v terminal block
on the furnace control. Failure to make proper connections
will result in improper operation. (See Fig. 22.)
3. Gas supply pressure to the furnace must be greater than 4.5-in.
wc (0.16 psig ) but not exceed 14-in. wc (0.5 psig ).
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing furnaces.
4. Check all manual-reset switches for continuity.
5. Install blower compartment door. Door must be in place to
operate furnace.
6. Setup switch descriptions
The 2 stage furnace has DIP switches used to select thermostat
staging and blower off delay timings.
For switch locations on Furnace control board, See Fig. 32 and
56.
7. Setup switch descriptions - See Table 8.
Step 2—Start-Up Procedures
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could cause property damage,
personal injury, or death.
Never purge a gas line into a combustion chamber. Never use
matches, candles, flame, or other sources of ignition for the
purpose of checking leakage. Use a soap-and-water solution
to check for leakage.
1. Purge gas lines after all connections have been made.
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