
145
YORK INTERNATIONAL
FORM 201.18-NM6
Turn on a Fan Stage
Every 5 sec
19.7 BARG
Turn on a Fan Stage
every 15 min
17.2 BARG
Discharge Pressure 17.2 BARG
10.3 BARG
Turn off Fan Stage
every 15 min.
8.3 BARG
Turn off a Fan Stage
every 5 sec.
0 BARG
Note: A low Oil - Suction differential Pressure less than 5.2 Bar.
will cause the micro to turn a fan stage Off every 5 sec. This
will override pressure control of the fans.
EPROM Version C.A14.09.03 (A85F),
other .03 versions and higher
Fan operation is outlined in Table 7. Condenser fan ON
conditions are governed solely by the Discharge Pres-
sure (DP). When the DP rises above 14.1 BARG, fan
stage 1 is activated. From there, subsequent fan stages
are activated as the discharge pressure rises. The sys-
tem will remain at the highest fan stage reached unless
the OFF conditions outlined in the next paragraph are
satisfied.
Condenser fan OFF conditions are governed by both the
DP and OAT. Fan staging will be decreased from the highest
fan stage reached if both the DP and OAT requirements are
met. For example, if a system is at fan stage 3, and the DP
falls below 13.4 BARG and the OAT drops below 23.9° C,
the fan stage will be reduced to stage 3.
TABLE 6 – CONDENSER FAN CONTROL WITH 3
FANS PER SYSTEM (EPROM VERSIONS
C.A32.09.02 (0483), C.ACS.09.02 (D87E),
AND C.A06.09.03 (EIOC)
Fan
ON *
OFF *
Fan
Wire
Relay
Stage
Fans
Conditions
Conditions
Contactor
Number
Board
DP
DP & OAT
Output*
1
1
>14.1 BARG
<9.3 BARG & <15.6°F
9M
130
15
SYS1
2
3
>18.3 BARG
<9.3 BARG & <18.3°F
10M
131
14
3
5
>19.7 BARG
<9.3 BARG & <21.1°F
11M
132
10
4
1, 5
>14.1 BARG
<9.3 BARG & <23.9°F
9M, 11M
130, 132
10,15
SYS2
5
3, 5
>18.3 BARG
<9.3 BARG & <26.7°F
10M, 11M
131, 132
10, 14
6
1, 3, 5
>19.7 BARG
<9.3 BARG & <29.4°F
9M, 10M, 11M
130, 131, 132
10, 14, 15
TABLE 7 – CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS
WITH 3 FANS/SYSTEM (EPROM VERSIONS C.A14.09.03 (A85F), OTHER .03 VERSIONS, AND HIGHER
* Sys 1 Outputs are on Relay Board #1
Sys 2 Outputs are on Relay Output Board #2
8
Summary of Contents for MILLENIUM YCAS Series
Page 47: ...47 YORK INTERNATIONAL FORM 201 18 NM6 7 This page intentionally left blank...
Page 59: ...59 YORK INTERNATIONAL FORM 201 18 NM6 7 This page intentionally left blank...
Page 63: ...63 YORK INTERNATIONAL FORM 201 18 NM6 7 WIRING DIAGRAM WYE DELTA START LD06015...
Page 68: ...68 YORK INTERNATIONAL Technical Data LEGEND 0283 0343 LD06179...
Page 69: ...69 YORK INTERNATIONAL FORM 201 18 NM6 7 LD05957...
Page 70: ...70 YORK INTERNATIONAL Technical Data CONNECTION DIAGRAM SYSTEM WIRING LD06019...
Page 71: ...71 YORK INTERNATIONAL FORM 201 18 NM6 7 COMPRESSOR TERMINAL BOX LD06020...