Carrier GT-PX specifications Cooling, GT-GS & GT-S Performance Correction Factors

Indoor & Outdoor Split Geothermal Comfort Systems

Heating

HE

LWT = EWT - GPM x 500

HC

LAT = EAT + CFM x1.08

Cooling

LWT = EWT +	HR			LC = TC - SC
	GPM x 500
LAT (DB) = EAT (DB) -			SC	S/T =	SC
		CFM x1.08			TC

CFM	= airflow, cubic feet/minute	HWC	= Hot Water Generator (desuperheater)
EWT	= entering water temperature, ˚F			capacity, Mbtuh
GPM	= water flow in US gallons/minute	WPD	= Water coil pressure drop (psi & ft hd)
EAT	= entering air temperature, Fahrenheit	EER	=	Energy Efficiency Ratio
	(dry bulb/wet bulb)			= BTU output/Watt input
HC	= air heating capacity, Mbtuh	COP	=	Coefficient of Performance
TC	= total cooling capacity, Mbtuh			= BTU output/BTU input
SC	= sensible cooling capacity, Mbtuh	LWT	= leaving water temperature, °F
KW	= total power unit input, KiloWatts	LAT	= leaving air temperature, °F
HR	= total heat of rejection, Mbtuh	LC	= latent cooling capacity, Mbtuh
HE	= total heat of extraction, Mbtuh	S/T	= sensible to total cooling ratio

GT-GS & GT-S Performance Correction Factors

	Heating Corrections								Cooling Corrections
								Sens Clg Cap Multiplier - Entering DB °F
Ent Air DB		Htg Cap	Power	Heat of	Ent Air	Total Clg								Power	Heat of
							70	75	80	80.6	85	90	95
°F				Ext	WB °F	Cap									Rej
60		1.019	0.896	1.054	60	0.881	0.943	1.067	1.192	1.240	*	*	*	0.983	0.899
65		1.010	0.948	1.028	65	0.940	0.797	0.952	1.106	1.125	1.261	*	*	0.991	0.949
68		1.004	0.980	1.011	66.2	0.976	0.693	0.868	1.043	1.063	1.217	*	*	0.997	0.980
70		1.000	1.000	1.000	67	1.000	0.624	0.812	1.000	1.023	1.188	1.343	1.352	1.000	1.000
75		0.997	1.059	0.979	70	1.012		0.697	0.820	0.835	0.944	1.067	1.257	1.002	1.010
80		0.993	1.118	0.957	75	1.024			0.637	0.658	0.817	0.983	1.159	1.005	1.019

Rev. 5/2/00M

* Sensible capacity equals total capacity (no latent capacity) at conditions shown as "*"

ARI/ISO/ASHRAE 13256-1 uses entering air conditions of Clg- 80.6°F DB/66.2°F WB and Htg- 68°F DB/59°F WB

Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05

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