Start-Up Procedures; General; Select Setup Switch Positions - Carrier 58MVP080 Installation, Start-Up, And Operating Instructions Manual

AIR CONDITIONER
CFM AIRFLOW
(TONS)
Default
1-1/2
2
2-1/2
3
3-1/2
4
5
X—Indicates allowable selection.
Blower access panel door switch opens 24-v power to control
center. No component operation can occur. The 115-v power
is still present at control center, transformer, inducer motor,
and main blower motor. Caution must be taken when manu-
ally closing this switch for service purposes. Failure to follow
this warning could result in personal injury or death.
6. When above items have been completed, the following will
occur:
a. Green LED lights for 1 sec, followed by both the green and
yellow LEDs which light for another 1 sec. During this
period, the control is checking itself out.
b. Inducer motor operates for 20 sec at low speed, operates 20
sec at high speed, then turns off.
c. Hot surface ignitor is energized for 15 sec, then de-
energized.
d. Main blower motor operates for 20 sec at low speed,
operates at high speed for 20 sec, then turns off.
e. After component operation test is completed, 1 or more
fault codes (11, 22, 41 or 42) will flash. See service label
on back of main furnace door for explanation of codes.
NOTE: To repeat component test, turn setup switch SW-6 to OFF
and then back to ON.
7. Remove device used to manually close blower panel access
door switch and turn setup switch SW-6 to OFF position.
8. Replace blower access panel and check LED status through
sight glass.
9. Reinstall main furnace door if all LEDs are off, indicating the
furnace is ready to operate when a signal from the thermostat
is received.

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.
Table 7—Air Conditioning (A/C) Airflow Setup Switch Position
A/C SETUP
SWITCH POSITION
A/C-1 A/C-2
1200 or
OFF
2000
600 ON
800 OFF
1000 ON
1200 OFF
1400 ON
1600 OFF
2000 ON
A/C-3 042040
3 Tons
OFF OFF
1200 CFM
OFF OFF X
ON OFF X
ON OFF X
OFF ON X
OFF ON X
ON ON —
ON ON —
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.
Step 2—Select Setup Switch Positions
AIR CONDITIONING (A/C) SETUP SWITCHES
The air conditioning setup switches are used to match furnace
airflow to the 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 the A/C setup switches on the control center. (See Fig
25.)
3. Determine the air conditioning tonnage used.
4. Use Table 7 or wiring schematic to determine the proper setup
position of A/C switches. (See Fig. 23.)
NOTE: Excessive airflow caused by improper A/C switch setup
may cause condensate blow off in the cooling mode.
5. Replace main furnace door and blower access panel.
NOTE: EAC-1 terminal is energized whenever the blower oper-
ates. HUM terminal is only energized when the gas valve is
energized.
CONTINUOUS FAN (CF) SETUP SWITCHES
The CF setup switches are used to select desired airflow when the
thermostat is in the continuous fan mode. This setup feature will
allow the continuous fan airflow to be adjusted. To set the desired
continuous fan airflow:
1. Remove main furnace door and blower access panel.
2. Locate the CF setup switches on the control center. (See Fig
25.)
3. Determine the desired continuous fan airflow.
4. Use Table 8 or wiring schematic to determine the proper setup
position of CF switches. (See Fig 23.)
NOTE: The CF switches are factory set to provide the continuous
fan airflow equal to the low heat mode.
5. Replace main furnace door and blower access panel.
32
ALLOWABLE FURNACE
MODEL - SETUP
042060 042080
3 Tons 3 Tons
1200 CFM 1200 CFM
X X
X X
X X
X X
X X
— —
— —
060100
5 Tons
2000 CFM
—
X
X
X
X
X
X