York R-410A manual YTG-G-0708, RPM Selection, Additional Static Resistance

251934-YTG-G-0708

RPM Selection

Size	Model	HP	Max	Motor	Blower	6 Turns	5 Turns	4 Turns	3 Turns	2 Turns	1 Turn	Fully
(Tons)			BHP	Sheave	Sheave	Open	Open	Open	Open	Open	Open	Closed
180	ZJ/ZF	5	5.75	1VP65	BK110	815	850	885	920	950	985	N/A
(15)		5	5.75	1VP65	BK090	1010	1055	1095	1135	1180	1220	N/A
210	ZJ/ZF	5	5.75	1VP60	BK110	730	765	800	835	870	905	N/A
(17.5)		7.5	8.63	1VP60	BK090	905	950	990	1035	1075	1120	N/A
240	ZJ/ZF	5	5.75	1VP60	BK110	730	765	800	835	870	905	N/A
(20)		7.5	8.63	1VP60	BK090	905	950	990	1035	1075	1120	N/A
300		7.5	8.63	1VP60	1B5V94	810	850	885	920	960	1000	N/A
	ZJ/ZF	10	11.50	1VP75X	1B5V110	975	1005	1040	1070	1100	1135	1165
(25)
		15	17.25	1VP75X	1B5V94	1140	1180	1215	1255	1290	1330	1365
180	ZR	5	5.75	1VP65	BK110	815	850	885	920	950	985	N/A
(15)		7.5	8.63	1VP65	BK090	1010	1055	1095	1135	1180	1220	N/A
240	ZR	7.5	8.63	1VP60	BK110	730	765	800	835	870	905	N/A
(20)		10	11.50	1VP60	BK090	905	950	990	1035	1075	1120	N/A
300		7.5	8.63	1VP60	1B5V94	810	850	885	920	960	1000	N/A
	ZR	10	11.50	1VP75X	1B5V110	975	1005	1040	1070	1100	1135	1165
(25)
		15	17.25	1VP75X	1B5V94	1140	1180	1215	1255	1290	1330	1365

Additional Static Resistance

Size	Model	CFM	Cooling Only1	Economizer2 3		Electric Heat kW2
(Tons)					18	36	54	72
180	ZJ	4500	0.10	0.10	0.10	0.10	0.20	0.20
	ZR	6000	0.10	0.10	0.10	0.20	0.30	0.40
(15)
	ZF	7500	0.10	0.10	0.10	0.30	0.40	0.60
		6000	0.10	0.10	0.10	0.10	0.20	0.20
210 (17.5)	ZJ	7500	0.10	0.10	0.10	0.20	0.30	0.40
240 (20)	ZR	9000	0.15	0.15	0.10	0.30	0.40	0.60
300 (25)	ZF	10500	0.15	0.15	0.20	0.40	0.60	0.80
		12000	0.20	0.20	0.30	0.50	0.70	0.90

1.Add these values to the available static resistance in the respective Blower Performance Tables.

2.Deduct these values from the available external static pressure shown in the respective Blower Performance Tables.

3.The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.

Johnson Controls Unitary Products 65