York MILLENIUM YCAS Series Installation Operation & Maintenance page 143

If discharge pressure drops below 8.3 BARG or oil to
suction pressure differential falls below 5.2 BARG, the
micro will turn off a step of fan cycling every 5 sec-
onds: until the discharge pressure rises above 8.3 BARG
and oil to suction pressure differential rises above 5.2
BARG in an effort to quickly control the discharge pres-
sure to an acceptable range.
TABLE 4 – CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS
WITH 3 FANS/SYSTEM (EPROM VERSIONS C.ACS.09.01 (F350) AND C.ACS.09.02 (3902)
Fan
Fans
Stage
1 1
S
2 3
Y
3 5
S
4 1, 5
5 3, 5
1
6 1, 3, 5
1 2
S
2 4
Y
3 6
S
4 2, 6
5 4, 6
2
6 2, 4, 6
* Sys 1 Outputs are on Relay Output Board #1
Sys 2 Outputs are on Relay Output Board #2
TABLE 5 – CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS
WITH 3 FANS/SYSTEM (EPROM VERSION C.A17.09.02 (5320)
Fan
Fans
Stage
1 1
S
2 3
Y
3 5
S
4 1, 5
5 3, 5
1
6 1, 3, 5
1 2
S
2 4
Y
3 6
S
4 2, 6
5 4, 6
2
6 2, 4, 6
* Sys 1 Outputs are on Relay Board #1
Sys 2 Outputs are on Relay Output Board #2
YORK INTERNATIONAL
ON * OFF *
Conditions Conditions
DP DP & OAT
>15.2 BARG <10.3 BARG & <15.6°C
>16.2 BARG <11.4 BARG & <18.3°C
>17.2 BARG <12.4 BARG & <21.1°C
>18.3 BARG <13.4 BARG & <23.9°C
>19.3 BARG <14.5 BARG & <26.7°C
>20.0 BARG <15.2 BARG & <29.4°C
>15.2 BARG <10.3 BARG & <15.6°C
>16.2 BARG <11.4 BARG & <18.3°C
>17.2 BARG <12.4 BARG & <21.1°C
>18.3 BARG <13.4 BARG & <23.9°C
>19.3 BARG <14.5 BARG & <26.7°C
>20.0 BARG <15.2 BARG & <29.4°C
ON * OFF *
Conditions Conditions
DP DP & OAT
>14.1 BARG <9.3 BARG & <15.6°C
>15.2 BARG <10.3 BARG & <18.3°C
>16.2 BARG <11.4 BARG & <21.1°C
>17.2 BARG <12.4 BARG & <23.9°C
>18.3 BARG <13.4 BARG & <26.7°C
>19.0 BARG <14.1 BARG & <29.4°C
>14.1 BARG <9.3 BARG & <15.6°C
>15.2 BARG <10.3 BARG & <18.3°C
>16.2 BARG <11.4 BARG & <21.1°C
>17.2 BARG <12.4 BARG & <23.9°C
>18.3 BARG <13.4 BARG & <26.7°C
>19.0 BARG <14.1 BARG & <29.4°C
Table 6 provides a simplified operating graph of the fan
staging for this version.
Fan stages increment identical to the stages shown in
Table 4.
Fan
Contactor
9M
10M
11M
9M, 11M
10M, 11M
9M, 10M, 11M
15M
16M
17M
15M, 17M
16M, 17M
15M, 16M, 17M
Fan
Contactor
9M
10M
11M
9M, 11M
10M, 11M
9M, 10M, 11M
15M
16M
17M
15M, 17M
16M, 17M
15M, 16M, 17M
FORM 201.18-NM6
Relay
Wire
Board
Number
Output*
130 15
131 14
132 10
130, 132 10,15
131, 132 10, 14
130, 131, 132 10, 14, 15
230 15
231 14
232 10
230, 232 10, 15
231, 232 10, 14
230, 231, 232 10, 14, 15
Relay
Wire
Board
Number
Output*
130 15
131 14
132 10
130, 132 10,15
131, 132 10, 14
130, 131, 132 10, 14, 15
230 15
231 14
232 10
230, 232 10, 15
231, 232 10, 14
230, 231, 232 10, 14, 15
143
8