Geostar Aston Compact Series, Installation Manual

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41
ASTON COMPACT INSTALLATION MANUAL
Operating Limits
Operating Limits
Cooling Heating
(°F) (°C) (°F) (°C)
Air Limits
Min. Ambient Air
45 7.2 45 7.2
Rated Ambient Air 80 26.7 70 21.1
Max. Ambient Air 100 37.8 85 29.4
Min. Entering Air 50 10.0 40 4.4
Rated Entering Air db/wb 80.6/66.2 27/19 68 20.0
Max. Entering Air db/wb 110/83 43/28.3 80 26.7
Water Limits
Min. Entering Water
30 -1.1 20 -6.7
Normal Entering Water 50-110 10-43.3 30-70 -1.1
Max. Entering Water 120 48.9 90 32.2
NOTE:
Minimum/maximum limits are only for start-up conditions, and are meant
for bringing the space up to occupancy temperature. Units are not designed to
operate at the minimum/maximum conditions on a regular basis. The operating
limits are dependant upon three primary factors: 1) water temperature, 2) return
air temperature, and 3) ambient temperature. When any of the factors are at the
minimum or maximum levels, the other two factors must be at the normal level for
proper and reliable unit operation.
Operating Parameters
Single Speed Models
Entering Water
Temp °F
Water Flow
gpm/ton
Cooling -- No Hot Water Generation
Suction Pressure
psig
Discharge Pres-
sure psig
Superheat Subcooling
Water Temp Rise
°F
Air Temp Drop
°F DB
30
1.5 115 - 125 150 - 170 20 - 35 10 - 17 17 - 22 17 - 23
3.0 105 - 120 130 - 145 20 - 35 10 - 17 8 - 10 17 - 23
50
1.5 130 - 140 215 - 235 12 - 20 8 - 14 16 - 22 17 - 23
3.0 128 - 138 190 - 210 12 - 20 8 - 14 8 - 12 17 - 23
70
1.5 138 - 148 280 - 310 10 - 16 10 - 16 15 - 21 17 - 23
3.0 136 - 146 250 - 280 10 - 16 8 - 14 7 - 13 17 - 23
90
1.5 145 - 155 350 - 380 9 - 14 10 - 16 14 - 20 17 - 23
3.0 143 - 153 320 - 350 9 - 14 8 - 14 6 - 10 17 - 23
110
1.5 145 - 155 420 - 450 9 - 14 10 - 16 14 - 20 17 - 23
3.0 143 - 153 405 - 435 9 - 14 8 - 14 6 - 10 17 - 23
Entering Water
Temp °F
Water Flow
gpm/ton
Heating - No Hot Water Generation
Suction Pressure
psig
Discharge Pres-
sure psig
Superheat Subcooling
Water Temp Drop
°F
Air Temp Rise
°F DB
30
1.5 73 - 85 270 - 305 8 - 14 3 - 10 6 - 10 15 - 21
3.0 77 - 90 280 - 315 8 - 14 3 - 10 4 - 8 17 - 23
50
1.5 97 - 110 290 - 325 10 - 16 3 - 10 9 - 13 22 - 28
3.0 102 - 115 300 - 335 10 - 16 3 - 10 7 - 11 24 - 30
70
1.5 130 - 145 320 - 355 13 - 19 3 - 10 10 - 14 30 - 36
3.0 135 - 150 325 - 360 13 - 19 3 - 10 8 - 12 32 - 38
90
1.5 150 - 160 350 - 390 13 - 19 3 - 10 10 - 14 30 - 36
3.0 155 - 165 365 - 405 13 - 19 3 - 10 8 - 12 32 - 38
110
1.5
3.0
NOTE:
Cooling performance based on entering air temperatures of 80º F DB, 67º F WB.
Heating performance based on entering air temperature of 70º F DB.
2/15/12