Table of Contents
Advertisement
Micro Panel Contents
If discharge pressure drops below 120 PSIG or oil to
suction pressure differential falls below 75 PSID, the
micro will turn off a step of fan cycling every 5 seconds:
until the discharge pressure rises above 120 PSIG and
oil to suction pressure differential rises above 75 PSID
in an effort to quickly control the discharge pressure to
an acceptable range.
TABLE 3 – CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS
WITH 4 FANS/SYSTEM (EPROM VERSIONS C.ACS.09.01 (F350) AND C.ACS.09.02 (3902)
Fan
Stage
Fans
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 4 – CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS
WITH 5 FANS/SYSTEM (EPROM VERSION C.A17.09.02 (5320)
Fan
Stage
Fans
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
168
ON *
OFF *
Conditions
Conditions
DP
DP & OAT
>220 PSIG
<150 PSIG & <60°F
>235 PSIG
<165 PSIG & <65°F
>250 PSIG
<180 PSIG & <70°F
>265 PSIG
<195 PSIG & <75°F
>280 PSIG
<210 PSIG & <80°F
>290 PSIG
<220 PSIG & <85°F
>220 PSIG
<150 PSIG & <60°F
>235 PSIG
<165 PSIG & <65°F
>250 PSIG
<180 PSIG & <70°F
>265 PSIG
<195 PSIG & <75°F
>280 PSIG
<210 PSIG & <80°F
>290 PSIG
<220 PSIG & <85°F
ON *
OFF *
Conditions
Conditions
DP
DP & OAT
>205 PSIG
<135 PSIG & <60°F
>220 PSIG
<150 PSIG & <65°F
>235 PSIG
<165 PSIG & <70°F
>250 PSIG
<180 PSIG & <75°F
>265 PSIG
<195 PSIG & <80°F
>275 PSIG
<205 PSIG & <85°F
>205 PSIG
<135 PSIG & <60°F
>220 PSIG
<150 PSIG & <65°F
>235 PSIG
<165 PSIG & <70°F
>250 PSIG
<180 PSIG & <75°F
>265 PSIG
<190 PSIG & <80°F
>275 PSIG
<205 PSIG & <85°F
Table 5 provides a simplified operating graph of the fan
staging for this version.
Fan stages increment identical to the stages shown in
Table 3.
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
Wire
Relay
Number
Board
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
Wire
Relay
Number
Board
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
JOHNSON CONTROLS
Advertisement
Table of Contents
