York YLUA0078 - CONDENSER FAN CONTROL - YLUA0098 - YLUA0130 CONDENSING UNITS; TABLE 28 - YLUA0098 - YLUA0130 CONDENSER FAN CONTROL; FIGURE 26 - YLUA0098 - YLUA0130 FAN LOCATION

JOHNSON CONTROLS
137
SECTION 8 – UNIT OPERATION
FORM 150.73-NM1
ISSUE DATE: 09/04/2020
8
CONDENSER FAN CONTROL
YLUA0098 – YLUA0130 CONDENSING UNITS
Condenser fan control on models YLUA0098 –
YLUA0130 will always be by discharge pressure. The
on pressure and the differential off pressure are pro-
grammable under the PROGRAM key.
CONDENSER FAN CONTROL - YLUA0098 – YLUA0130
The following Figures and Tables outline fan sequenc-
ing for the various models. These models are equipped
to operate to 0°F ambient as a standard.
FIGURE 26 - YLUA0098 – YLUA0130 FAN LOCATION
TABLE 28 - YLUA0098 – YLUA0130 CONDENSER FAN CONTROL
FAN
STAGE
ON OFF
CONTACTOR
I/O BOARD
OUTPUT
FAN #
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1
1 FAN
FWD
DP > Fan Ctrl On
Press
DP < Fan Ctrl On Press
– (Di󰀨. Press.)
10M 14M TB7-9 TB10-9 7 8
2
2 FANS
FWD
DP > Fan Ctrl On
Press
+ 20 psig (1.38
Bars)
DP < Fan Ctrl On Press. –
[(Di󰀨 Press.) + 20 psig
(1.38 Bars)]
9M and
10M
13M
and
14M
TB7-9
and
TB7-10
TB10-9
and
TB10-10
5 and 7 6 and 8
3
3 FANS
FWD
DP > Fan Ctrl On
Press
+ 40 psig (2.76
Bars)
DP < Fan Ctrl On Press.) –
[(Di󰀨 Press.) + 40 psig
(2.76 Bars)]
8M, 9M
and
10M
12M,
13M
and
14M
TB7-8,
TB7-9
and
TB7-10
TB10-8,
TB10-9
and
TB10-10
3, 5
and 7
4, 6
and 8
FAN #1
FAN #3
FAN #5
FAN #2
FAN #4
FAN #6
LD14098