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GT-PG
12
GT-PG (50YE) Series
Bryant: Whatever it Takes.
N/A N/A 1575 47.0 5.12 30.6 98 2.69 5.3
N/A N/A 2100 48.3 4.68 32.5 91 3.02 4.5
22.3 - 1575 50.7 5.21 33.9 100 2.85 6.2
22.5 - 2100 52.1 4.77 36.0 93 3.20 5.3
23.6 - 1575 52.8 5.26 35.8 101 2.94 6.2
23.7 - 2100 54.2 4.81 37.9 94 3.30 5.3
24.2 - 1575 53.9 5.28 36.8 102 2.99 6.2
24.4 - 2100 55.4 4.83 39.0 94 3.36 5.3
22.3 - 1575 57.6 5.36 40.1 104 3.15 7.1
22.5 - 2100 59.2 4.91 42.6 96 3.53 6.1
23.5 - 1575 60.4 5.42 42.6 105 3.26 7.1
23.7 - 2100 62.0 4.96 45.2 97 3.66 6.1
24.1 - 1575 61.9 5.46 44.0 106 3.33 7.1
24.3 - 2100 63.6 4.99 46.7 98 3.74 6.1
20.5 3.6 1575 65.2 5.52 47.0 108 3.46 7.9
20.6 3.8 2100 67.0 5.05 49.9 100 3.89 6.8
22.0 3.4 1575 68.7 5.60 50.1 110 3.60 7.9
22.2 3.5 2100 70.5 5.12 53.2 101 4.04 6.8
22.8 3.1 1575 70.6 5.64 51.8 112 3.67 7.9
22.9 3.2 2100 72.5 5.15 55.0 102 4.12 6.8
18.0 4.4 1575 73.3 5.69 54.2 113 3.77 8.8
18.1 4.6 2100 75.2 5.21 57.5 103 4.24 7.5
Performance capacities shown in thousands of Btuhting
Heating - EAT 70°F
EER HW
Airfl ow
CFM
HC kW HE LAT COP HW
Performance Data Selection Notes
For operation in the shaded area when water is used in
lieu of an anti-freeze solution, the LWT (Leaving Water
Temperature) must be calculated. Flow must be maintained
to a level such that the LWT is maintained above 40°F
[4.4°C] when the JW3 jumper is not clipped (see example
below). Otherwise, appropriate levels of a proper anti-freeze
should be used in systems with leaving water temperatures
of 40°F or below and the JW3 jumper should be clipped.
This is due to the potential of the refrigerant temperature
being as low as 32°F [0°C] with 40°F [4.4°C] LWT, which may
lead to a nuisance cutout due to the activation of the Low
Temperature Protection. JW3 should never be clipped for
standard range equipment or systems without antifreeze.
Example:
At 50°F EWT (Entering Water Temperature) and 1.5 gpm/
ton, a 3 ton unit has a HE of 22,500 Btuh. To calculate LWT,
rearrange the formula for HE as follows:
HE = TD x GPM x 500, where HE = Heat of Extraction (Btuh);
TD = temperature difference (EWT - LWT) and GPM = U.S.
Gallons per Minute.
TD = HE/(GPM x 500)
TD = 22,500/(4.5 x 500)
TD = 10°F
LWT = EWT - TD
LWT = 50 - 10 = 40°F
In this example, as long as the EWT does not fall below 50°F, the system will operate as designed. For EWTs below 50°F,
higher fl ow rates will be required (open loop systems, for example, require at least 2 gpm/ton when EWT is below 50°F).
Antifreeze Correction Table
Antifreeze Type
Antifreeze
%
Cooling Heating
WPD
Corr. Fct.
EWT 30°F
EWT 90°F EWT 30°F
Total Cap Sens Cap Power Htg Cap Power
Water
0 1.000 1.000 1.000 1.000 1.000 1.000
Propylene Glycol
5 0.995 0.995 1.003 0.989 0.997 1.070
15 0.986 0.986 1.009 0.968 0.990 1.210
25 0.978 0.978 1.014 0.947 0.983 1.360
Methanol
5 0.997 0.997 1.002 0.989 0.997 1.070
15 0.990 0.990 1.007 0.968 0.990 1.160
25 0.982 0.982 1.012 0.949 0.984 1.220
Ethanol
5 0.998 0.998 1.002 0.981 0.994 1.140
15 0.994 0.994 1.005 0.944 0.983 1.300
25 0.986 0.986 1.009 0.917 0.974 1.360
Ethylene Glycol
5 0.998 0.998 1.002 0.993 0.998 1.040
15 0.994 0.994 1.004 0.980 0.994 1.120
25 0.988 0.988 1.008 0.966 0.990 1.200