York YCAL0043E Series - Page 102

YORK INTERNATIONAL
102
FORM 150.62-NM7 (103)
Unit Controls
CONDENSER FAN CONTROL - YCAL0043 – YCAL00253
TABLE 28 – YCAL0043 - YCAL0253 LOW AMBIENT CONDENSER FAN CONTROL –
DISCHARGE PRESSURE CON TROL
CONTACTOR
MICRO BOARD
FAN #
FAN STAGE ON OFF OUTPUT TB-4
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1 1 2
1 FAN REV
DP > Fan Ctrl On Press. DP < Fan Ctrl On Press. – Diff. Press. 7M 10M 2 6
REV REV
2 DP > Fan Ctrl On Press. + DP < Fan Ctrl On Press. –
8M 11M
3 4
1 FAN FWD 20 PSIG (1.38 Bars) [Diff. Press. + 20 PSIG (1.38 Bars)]
4 8
FWD FWD
3 DP > Fan Ctrl On Press. + DP < Fan Ctrl On Press. – 8M & 11M & 4 & 5 8 & 9 1 & 3 2 & 4
2 FANS FWD 40 PSIG (2.76 Bars) [Diff. Press. + 40 PSIG (2.76 Bars)] 9M 12M FWD FWD
NOTE: When low ambient control of the fans is selected, fan control will be by discharge pressure only.