York 2000 installation instructions Electric Heaters, Air Flow Limitations, Typical Field Wiring

ELECTRIC HEATERS

Supplemental electric heaters may be ordered as a field-installed accessory. Refer to Form 530.18-N7.1V for installation instruction. These UL and C.G.A. approved heaters are located within the central compartment of the unit (see Figure 6 for access panel) with the heating elements extending into the supply air chamber.

Fuses are supplied, where required, by the factory. Some KW sizes require fuses and others do not. Refer to the electric heater accessory installation instruction for the heater electrical data.

The minimum air flow limitations across these heaters are listed in Table 2.

				511.06-N5Y
TABLE 2 - AIR FLOW LIMITATIONS
NOMINAL		UNIT MODEL SIZE, NOMINAL TONS
HEATER	1	3	4	5
SIZE	VOLTAGE
		MINIMUM SUPPLY AIR CFM
KW
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	1,300	1,600
30		–	–	1,600
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.

CONTROL WIRING

124-volt thermostat with subbase; -2TH11704024 for manual changeover. -2TH11704124 for automatic changeover.

2Only required on units with supplemental electric heat.

REFER TO ELECTRICAL DATA

TABLES TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION.

FIG. 3 - TYPICAL FIELD WIRING

TO REMOTE SENSOR

2TH04702224 IF USED

1Electronic progammable thermostat 2ET04700324 with subbase for either manual or automatic changeover.

2Only required on units with economizer. Remove jumper L2 from terminals

4 and 9 on jumper plug P7. The outdoor air intake dampers will return to their fully closed position when the thermostat switches to the “unoccupied” mode.

3Second stage cooling may be used on units with economizer. Remove jumper J1 from terminals 8 and 10 on jumper plug connector P7.

4Only required on units with supplemental electric heat.

POWER WIRING

REFER TO ELECTRICAL DATA

TABLES TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION.

Unitary Products Group 5