Start-Up Procedures; General; Select Setup Switch Positions - Carrier 58MVP Installation, Start-Up, And Operating Instructions Manual

AIR
CONDITIONER CFM AIRFLOW
(TONS)
1200 or
Default
2000
1-1/2 600
2 800
2-1/2 1000
3 1200
3-1/2 1400
4 1600
5 2000
X—Indicates allowable selection.
1. While blower is operating in either low heat or continuous fan,
the coast down calibration is performed once a minute to
update blower RPM for zone damper position changes during
a given cycle unless the blower pulse width to blower motor
is greater than 60 percent. This prevents nuisance faults from
occurring when a high continuous fan CFM has been selected.
2. While blower is operating in either high heat or cooling,
blower pulse width to blower motor is frozen when blower
RPM is within 10 percent of calculated blower RPM for 5 sec.

START-UP PROCEDURES

Step 1—General
1. Furnace must have a 115-v power supply properly connected
and grounded.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control center fault indicator light flashes
rapidly and furnace does not operate.
2. Thermostat wire connections at terminals R, W/W1, G, and
Y/Y2 must be made at 24-v terminal block on control center.
3. Natural gas service pressure must not exceed 0.5 psig (14-in.
wc), but must be no less than 0.16 psig (4.5-in. wc).
4. Blower access panel must be in place to complete 24-v
electrical circuit to furnace.
These furnaces are equipped with a manual reset limit switch
in burner box. This switch opens if an overheat condition
(rollout) occurs in burner enclosure. Correct inadequate
combustion-air supply or improper venting condition and
reset switch. DO NOT jumper this switch.
Before operating furnace, check each manual reset switch for
continuity. If necessary, press button to reset switch.
CONTINUOUS
FAN (CFM)
CF-1
Default OFF
600 ON
800 OFF
1000 ON
1200 OFF
1400 ON
1600 OFF
2000 ON
* Add 15% additional CFM when Bypass Humidifier switch SW-3 on control board is used.
X—Indicates allowable selection.
Table 8—Air Conditioning (A/C) Airflow Setup Switch Position
A/C SETUP
SWITCH POSITION
A/C-1 A/C-2 A/C-3
OFF OFF OFF
ON OFF OFF
OFF ON OFF
ON ON OFF
OFF OFF ON
ON OFF ON
OFF ON ON
ON ON ON
Table 9—Continuous Fan (CF) Airflow Setup Switch Position
CF SETUP
SWITCH POSITION
CF-2 CF-3
OFF OFF
OFF OFF
ON OFF
ON OFF
OFF ON
OFF ON
ON ON
ON ON
ALLOWABLE FURNACE MODEL SETUP
040-14 060-14 080-14
3 Tons 3 Tons 3 Tons
1200 CFM 1200 CFM 1200 CFM
X X
X X
X X
X X
X X
— —
— —
Step 2—Select Setup Switch Positions
AIR CONDITIONING (A/C) SETUP SWITCHES
The air conditioning setup switches are used to match furnace
airflow to cooling unit used. This furnace will provide 400 CFM
per selected air conditioning tonnage.
To set the desired cooling airflow:
1. Remove main furnace door and blower access panel.
2. Locate A/C setup switches on control center. (See Fig. 25.)
3. Determine air conditioning tonnage used.
4. Use Table 8 or wiring schematic to determine proper setup
position of A/C switches. (See Fig. 24 and 45.)
→ Fig. 48—Example of Setup Switch in OFF
NOTE: Excessive airflow caused by improper A/C switch setup
may cause condensate blow off in cooling mode.
5. Replace main furnace door and blower access panel.
ALLOWABLE FURNACE MODEL SETUP
040-14 060-14 080-14
565* 515* 690*
X X
X X
X X
X X
X X
— — —
— — —
36
080-20 100-20
5 Tons 5 Tons
2000 CFM 2000 CFM
X — —
X X X
X X X
X X X
X X X
— X X
— X X
1
OFF
Position
080-20 100-20
690* 860*
X — —
X X X
X X X
X X X
X X X
X X
X X
120-20
5 Tons
2000 CFM
—
X
X
X
X
X
X
A95198
120-20
1035*
—
X
X
X
X
X
X