York 2000 warranty Static Resistances, Heater / CFM Limitations

036-21564-003-A-1005

STATIC RESISTANCES

EXTERNAL STATIC PRESSURE DROP

					RESISTANCE, IWG
DESCRIPTION						CFM
		1000	1200	1400	1600	1800	2000	2200	2400	2600
Economizer1, 2		0.07	0.08	0.09	0.11	0.13	0.15	0.17	0.20	0.23
Electric Heaters1	5 - 15 KW	0.04	0.05	0.06	0.07	0.08	0.10	0.12	0.14	0.16
	20 - 30 KW	0.06	0.07	0.08	0.09	0.11	0.13	0.15	0.17	0.20
Bottom Duct Connections1		0.06	0.07	0.08	0.09	0.10	0.11	0.12	0.14	0.16

1Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.

2The pressure thru the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct system is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.

HEATER / CFM LIMITATIONS

HEATER		UNIT MODEL SIZE, NOMINAL TONS
SIZE	VOLTAGE1	3	4	5
NOM. KW		MINIMUM SUPPLY AIR CFM
5		1,100	1,300	1,600
7		1,100	1,300	1,600
10	208 /	1,200	1,300	1,600
15	230-1-60	1,200	1,300	1,600
20		1,3002	1,3002	1,600
30		-	-	1,600
5		1,100	1,300	1,600
7		1,100	1,300	1,600
10	208 /	1,200	1,300	1,600
15	230-3-60	1,200	1,300	1,600
20		1,3002	1,3002	1,600
30		-	-	1,600

HEATER		UNIT MODEL SIZE, NOMINAL TONS
SIZE	VOLTAGE1	3	4	5
NOM. KW		MINIMUM SUPPLY AIR CFM
7		1,100	1,300	1,600
10		1,200	1,300	1,600
15	460-3-60	1,200	1,300	1,600
20		1,300	1,300	1,600
30		-	-	1,600
10		1,200	1,300	1,600
15	575-3-60	1,200	1,300	1,600
20		1,300	1.400	1,600
30		-	-	1,800

1208/230 and 460 volt heaters are UL approved. 208/230 and 575 volt heaters are CGA approved.

2CGA minimum is 1,400 CFM.

FIELD WIRING CONTROL WIRING

2

124-volt thermostat with subbase: —2TH11700224 for manual changeover. —2TH11704124 for automatic changeover.

2Only required on units with supplemental electric heat.

2

3

4

TO REMOTE SENSOR 2TH04702224 IF USED

REFER TO ELECTRICAL DATA TABLES TO SIZE THE DISCONNECT SWITCH, THE WIRING AND OVERCURRENT PROTECTION

POWER WIRING

REFER TO ELECTRICAL DATA

TABLES TO SIZE THE

DISCONNECT SWITCH, THE

WIRING AND OVERCURRENT

PROTECTION

10 Unitary Products Group