Carrier 38GXM - Application Data and Unit Selection; Unit Selection Guidance; Cooling and Heating Capacities (18 K & 24 K)

9
APPLICATION DATA
UNIT SELECTION
When selecting a variable speed system match the system capacity
range to the anticipated load range. Since a variable speed system
can accommodate a wide range of loads it is important to
understand the percentage of time that the system will be required
to run at the both the maximum and the minimum load points. This
differential is most evident when a residential application is
compared with a commercial application.
Generally there will be more load diversification in the residential
application (shifting from low load to high load).
The commercial application will tend to be more steady during the
normal day time hours, and will go to low load levels after normal
business hours. If it is anticipated that the system will be required
to run at the maximum load point for the majority of the time, the
next larger system capacity should be selected.
The tables below are guidelines for selecting the proper size for the
application.
CAPACITIES
18K -- COOLING
Fan Coil Combinations FCU 1 BTUH FCU 2 BTUH Cooling Capacity BTUH Cooling Capacity Range BTUH
1 x 40GXM009---3 9,300 --- 9,300 4,900 --- 12,500
1 x 40GXM012---3 10,200 --- 10,200 5,100--- 12800
2 x 40GXM009---3 8,800 8,800 17,600 3,750 --- 19,600
1 x 40GXM009---3
1 x 40GXM012---3
8,500 9,800 18,300 3,450 --- 21,300
18K -- HEATING
Fan Coil Combinations FCU 1 BTUH FCU 2 BTUH Heating Capacity BTUH Heating Capacity Range BTUH
1 x 40GXM009---3 9,600 --- 9,600 3,700 --- 10,600
1 x 40GXM012---3 10,600 --- 10,600 3,900 --- 11,700
2 x 40GXM009---3 9,100 9,100 18,200 8,200 --- 19,800
1 x 40GXM009---3
1 x 40GXM012---3
9,000 10,300 19,300 8,800 --- 21,000
24K -- COOLING
Fan Coil Combinations FCU 1 BTUH FCU 2 BTUH Cooling Capacity BTUH Cooling Capacity Range BTUH
1 x 40GXM009---3 14,100 --- 14,100 12,700 --- 16,700
1 x 40GXM012---3 15,600 --- 15,600 14,200 --- 18,600
2 x 40GXM009---3 11,400 11,400 22,800 11,800 --- 25,500
1 x 40GXM009---3
1 x 40GXM012---3
11,000 13,000 24,000 12,300 --- 26,800
1 x 40GXM012---3
1 x 40GXM012---3
12,775 12,775 25,050 12,850 --- 28,000
24K -- HEATING
Fan Coil Combinations FCU 1 BTUH FCU 2 BTUH Heating Capacity BTUH Heating Capacity Range BTUH
1 x 40GXM009---3 12,900 --- 12,900 10,500 --- 15,000
1 x 40GXM012---3 14,500 --- 14,500 11,600 --- 16,800
2 x 40GXM009---3 12,100 12,100 24,200 10,100 --- 26,600
1 x 40GXM009---3
1 x 40GXM012---3
11,800 14,300 26,100 10,900 --- 28,700
1 x 40GXM012---3
1 x 40GXM012---3
14,200 14,200 28,000 11,400 --- 31,200
38/40GXM