JOHNSON CONTROLS
107
FORM 150.62-NM6 (103)
2
FIG. 9 – YCAL0014 – YCAL0080 FAN LOCATION (TYPICAL)
LD07403
CONDENSER FAN CONTROL - YCAL0014 – YCAL0080
TABLE 27 – YCAL0014 – YCAL0080 CONDENSER FAN CONTROL USING OUTDOOR AMBIENT TEMPERA-
TURE AND DISCHARGE PRESSURE (DISCHARGE PRESSURE CONTROLS WILL NOT FUNC-
TION UNLESS THE OPTIONAL DISCHARGE PRESSURE TRANSDUCER IS INSTALLED)
CONTACTOR
MICRO BOARD
FAN #
FAN STAGE ON OFF OUTPUT TB-4
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1
OAT >25°F (-3.9°C) OAT < 20°F (-6.7°C)
1 FAN FWD
OR AND 8M 11M 4 8 3 4
DP > Fan Ctrl On Press DP < Fan Ctrl On Press – (Diff. Press.)
*3
OAT >65°F (18.3°C) OAT < 60°F (15.6°C)
2 FAN FWD
OR AND
7M & 10M & 2 &
4
6 & 8 1 & 3 2 & 4
DP > Fan Ctrl On Press DP < Fan Ctrl On Press – 8M 11M
+ 40 PSIG (2.76 Bars) [Diff. Press + 40 PSIG (2.76 Bars)]
TABLE 28 – YCAL0014 – YCAL0080 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY
CONTACTOR
MICRO BOARD
FAN #
FAN STAGE ON OFF OUTPUT TB-4
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1
DP > Fan Ctrl On Press
DP < Fan Ctrl On Press – (Diff. Press.)
8M 11M 4 8 3 4
1 FAN FWD
*3 DP > Fan Ctrl On Press + DP < Fan Ctrl On Press – 7M & 10M & 2 & 4 6 & 8 1 & 3 2 & 4
2 FANS FWD 40 PSIG (2.76 Bars) [(Diff. Press.) + 40 PSIG (2.76 Bars)] 8M 11M
* NOTE: STEP 2 is not active in the “Standard Ambient” mode. When changing to “Low Ambient” control, fan power wiring also changes.
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