Electric Heaters; Air Flow Limitations; Typical Field Wiring - York Sunline 2000 Installation Instruction

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.
24-volt thermostat with subbase;
1
-2TH11704024 for manual changeover.
-2TH11704124 for automatic changeover.
2
Only 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
Unitary Products Group
TABLE 2 - AIR FLOW LIMITATIONS
NOMINAL
HEATER
VOLTAGE
SIZE
KW
5
7
10
15
20
30
5
7
10
15
20
30
7
10
15
20
30
10
15
20
30
1208/230 and 460 volt heaters are UL approved.
208/230 and 575 volt heaters are CGA approved.
2 CGA minimum is 1,400 CFM.
CONTROL WIRING
Electronic progammable thermostat 2ET04700324 with subbase for either
1
manual or automatic changeover.
2
Only 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.
3
Second stage cooling may be used on units with economizer. Remove jumper
J1 from terminals 8 and 10 on jumper plug connector P7.
4
Only 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.
UNIT MODEL SIZE, NOMINAL TONS
1 3
MINIMUM SUPPLY AIR CFM
1,100 1,300
1,100 1,300
208 / 1,200 1,300
230-1-60 1,200 1,300
2
1,300 1,300
–
1,100 1,300
1,100 1,300
208 / 1,200 1,300
230-3-60 1,200 1,300
2
1,300 1,300
–
1,100 1,300
1,200 1,300
460-3-60 1,200 1,300
1,300 1,300
–
1,200 1,300
1,200 1,300
575-3-60
1,300 1,400
–
TO REMOTE SENSOR
2TH04702224 IF USED
511.06-N5Y
4 5
1,600
1,600
1,600
1,600
2
1,600
– 1,600
1,600
1,600
1,600
1,600
1,600
– 1,600
1,600
1,600
1,600
1,600
– 1,600
1,600
1,600
1,600
– 1,800
5