jumper is used to select airflow to match the needed tons of
cooling. The BLUE CFM/TON jumper wire is used to select slight
adjustments to airflow of 400, 350, or 315 CFM per ton. (See
Table 4.)
AIRFLOW SELECTION FOR 58MVP FURNACES
The 58MVP Condensing Variable-Speed Furnaces provide high-
and low-speed blower operation to match the capacities of com-
pressor at high and low speeds. To select recommended airflow,
refer to Table 5 and the 58MVP Installation Instructions. The
58MVP utilizes a control center that allows the installing techni-
cian to select proper airflows. For adjustments to the manual
switches labeled A/C and CF and recommended switch positions,
refer to Table 5. High-speed airflow is determined by the position
of the A/C switches, and low-speed airflow is determined by the
position of the CF switches. This furnace has a built-in, non-
adjustable 90 sec. off delay for cooling mode blower operation.
AIRFLOW SELECTION FOR FK4, FV4, OR 40FK FAN COILS
The FK4, FV4, and 40FK provides high- and low-speed blower
operation to match the capacities of compressor at high and low
speeds. To select recommended airflow, refer to Table 6 and the
FK4, FV4, or 40FK Installation Instructions. The FK4, FV4, and
40FK utilizes an EASY SELECT control board that allows the
installing technician to select proper airflows. The ORANGE
SYSTEM TYPE JUMPER wire should be set to HP—EFF or
HP—COMFORT. The BLUE AC/HP SIZE JUMPER is used to
select airflow to match the outdoor unit nominal size in tons of
cooling. The BLACK AC/HP CFM ADJUST jumper is used to
make slight adjustments to the selected airflow tonnage. (See
Table 6.) This fan coil has an adjustable blower off delay factory
set at 90 sec. for high- and low-speed blower operation.
Step 11—Start-Up
To prevent compressor damage or personal injury, observe
the following:
• Do not overcharge system with refrigerant.
• Do not operate unit in a vacuum or at negative pressure.
• Do not disable low-pressure switch.
To prevent personal injury wear safety glasses, protective
clothing, and gloves when handling refrigerant and observe
the following:
• Back seating service valves are not equipped with Schrader
valves. Fully back seat (counter clockwise) valve system
before removing gage port cap.
Do not vent refrigerant to atmosphere. Recover during system
repair or final unit disposal.
Follow these steps to properly start up the system:
1. The outdoor unit is equipped with a crankcase heater which
operates when the compressor is OFF. Energize crankcase
heater 24 hr before starting unit. To energize heater only, set
indoor thermostat to OFF position and close power disconnect
to unit.
2. Fully back seat (open) liquid and vapor tube service valves.
3. Unit is shipped with valve stem(s) front seated and caps
installed. Replace stem caps after system is opened to refrig-
erant flow (back seated). Replace caps finger tight and tighten
additional 1/12 turn (20 ft-lb torque) with wrench.
Table 3—Wiring Diagram Reference
INDOOR PRODUCT THERMOSTAT CONTROLS
DIAGRAM LETTER
IN FIG. 13
Standard Fan Coil
Carrier Programmable (Model 2S) Latent Capacity A
Carrier Non-Programmable (Model 2S) Latent Capacity B
Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor C
Other Brand Models Latent Capacity D
FK4, FV4, or 40FK Fan Coil
Carrier Programmable (Model 2S) — E
Carrier Non-Programmable (Model 2S) — F
Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor G
Other Brand Models — H
Single-Stage Furnace
Carrier Programmable (Model 2S) Latent Capacity J
Carrier Non-Programmable (Model 2S) Latent Capacity K
Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor L
Carrier Dual Fuel Thermostat (Model DF) Outdoor Sensor M
Other Brand Models Latent Capacity N
Two-Stage Furnace with PSC Blower Motor
Carrier Programmable (Model 2S) Latent Capacity P
Carrier Non-Programmable (Model 2S) Latent Capacity Q
Carrier Dual Fuel Thermostat (Model DF) Outdoor Sensor V
Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor R
Other Brand Models Latent Capacity S
Two-Stage Furnace with ICM Blower Motor
Carrier Programmable (Model 2S) — T
Carrier Non-Programmable (Model 2S) — U
Carrier Dual Fuel Thermostat (Model DF) Outdoor Sensor V
Other Brand Models — W
Variable-Speed 80 percent
Non-Condensing Furnace
Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor X
Carrier Dual Fuel Thermostat (Model DF) Outdoor Sensor Y
Variable-Speed Condensing Furnace Carrier Thermidistat™ Control (Model RH) Humidifier and Outdoor Sensor Z
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