Carrier Comprehensive Guide to 48GP Air Conditioners

Table 1—ICM FIOP Physical Data—Unit 48GP

THIS DATA APPLIES TO 48GP UNITS WITH THE ICM INDOOR MOTOR FIOP

UNIT SIZE 48GP	024040	024060	030040	030060		036060	036090	042060	042090
NOMINAL CAPACITY (ton)	2	2	2-1/2	2-1/2		3	3	3-1/2	3-1/2
OPERATING WEIGHT (lb.)	290	290	313	313		321	321	382	382
COMPRESSORS				Scroll
Quantity					1
REFRIGERANT (R-410A)	5.0	5.0	5.5	5.5		6.9	6.9	9.0	9.0
Quantity (lb.)
REFRIGERANT METERING DEVICE
Orifice ID (in.)	.057	.057	.057	.057		.065	.065	.070	.070
AccuRater™ Piston
CONDENSER COIL	1...17	1...17	1...17	1...17		2...17	2...17	2...17	2...17
Rows...Fins/in.
	10.9	10.9	12.7	12.7		9.1	9.1	12.3	12.3
Face Area (sq ft)
CONDENSER FAN	2350	2350	2350	2350		2350	2350	2350	2350
Nominal Cfm
	22	22	22	22		22	22	22	22
Diameter (in.)
	1/8 (825)	1/8 (825)	1/8 (825)	1/8 (825)		1/8 (825)	1/8 (825)	1/8 (825)	1/8 (825)
Motor HP (Rpm)
EVAPORATOR COIL	3...15	3...15	3...15	3...15		3...15	3...15	3...15	3...15
Rows...Fins/in.
	3.7	3.7	3.7	3.7		3.7	3.7	4.7	4.7
Face Area (sq ft)
EVAPORATOR BLOWER	800	800	1000	1000		1200	1200	1400	1400
Nominal Airflow (Cfm)
	10 X 10	10 X 10	10 X 10	10 X 10		11 X 10	11 X 10	11 X 10	11 X 10
Size (in.)
	1/2	1/2	1/2	1/2		3/4	3/4	3/4	3/4
Motor (HP)
FURNACE SECTION*
Burner Orifice No. (Qty...Drill Size)	2...44	2...38	2...44	2...38		2...38	3...38	2...38	3...38
Natural Gas
	2...50	2...46	2...50	2...46		2...46	3...46	2...46	3...46
Burner Orifice No. (Qty...Drill Size)
Propane Gas
HIGH-PRESSURE SWITCH (psig)				610 ± 15
Cutout
				420 ± 25
Reset (Auto)
LOSS-OF-CHARGE/LOW-
PRESSURE SWITCH				20 ± 5
(Liquid Line) (psig)
				45 ± 10
Cutout
Reset (Auto)
RETURN-AIR FILTERS (in.)	20 X 20 X 1	20 X 20 X 1	20 X 20 X 1	20 X 20 X 1		20 X 24 X 1	20 X 24 X 1	24 X 30 X 1	24 X 30 X 1
Throwaway

* Based on altitude of 0 to 2000 ft.

cooling cycle remains ‘‘on’’ until the room temperature drops to point that is slightly below the cooling control setting of the room thermostat. At this point, the thermostat ‘‘breaks’’ the circuit between thermostat terminal R to terminals Y and G. These open circuits de-energize contactor coil C and ICM board. The con- denser and compressor motors stop. After the time delay setting selected on the Easy Select™ board (See Easy Select Section) , the blower motor stops. The unit is in a ‘‘standby’’ condition, waiting for the next ‘‘call for cooling’’ from the room thermostat. The 5 minute compressor delay also applies to heat pump heating mode.

ELECTRICAL DATA & SCHEMATICS—ICM FIOP

Step 1—Physical Data & Electrical Schematics

Use the Physical Data and Electrical Tables on the following pages for information that applies to Carrier Puron® units with the ICM indoor motor FIOP.

AIRFLOW & TEMPERATURE RISE TABLES—ICM FIOP Step 2—Tables For System Set-Up

Use the Airflow and Temperature Rise Tables on the following pages for information that applies to Carrier Puron® units with the ICM indoor motor FIOP.

CARE AND MAINTENANCE

Indoor Blower and Motor

NOTE: All motors are pre-lubricated. Do not attempt to lubricate

these motors. For longer life, operating economy, and continuing efficiency, clean accumulated dirt and grease from the blower wheel and motor annually.

Disconnect and tag electrical power to the unit before cleaning and lubricating any blower motor and wheel. On units with gas heat, turn off the gas supply before disconnect- ing the electrical power. Failure to adhere to this warning could cause serious injury or death.

To clean the blower motor and wheel:

1.1. Remove and disassemble blower assembly as follows:

a.Remove unit access panel.

b.Carefully pivot blower access panel outward towards the electrical box. Route wiring above blower access panel.

c.Disconnect the 5 and 16 pin plugs at the blower motor.

d.On all units, remove blower assembly from unit. Remove screws securing blower to vertical partition and slide assembly out. Be careful not to tear insulation in blower compartment.

e.Ensure proper reassembly by marking blower wheel and motor in relation to blower housing before disassembly.

12