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JOHNSON CONTROLS
116
FORM 150.63-NM6 (1020)
Unit Controls
CONDENSER FAN CONTROL - YCUL0045 – YCUL0275
TABLE 28 –
YCUL0045 - YCUL0275 LOW AMBIENT CONDENSER FAN CONTROL –
DISCHARGE PRESSURE CONTROL
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
When Low Ambient Control of the
fans is selected, fan control will be by
discharge pressure only.
Summary of Contents for YCUL0045
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