Controls, Start-Up, Operation, Service and ... - Climayoreo

CIRCUIT A
COILS
Size 090, 100
6
MM
5
A3 A2 A1
Controlling Output
Contactor OFM(s)
Circuit
Software
Board
Conrolled
Controlled
Logic
Comp A1, A2, or A3 ON,
3
4
Common
CONDFAN4
RCB
Rly
2 OFC4 OFM4
or Comp B1, B2, or B3 ON
A CONDFAN3 RCB Rly 1 OFC3 OFM6 Circuit A SCT or OAT
B3 B2 B1
B CONDFAN2 MBB Rly 5 OFC2 OFM2 Circuit B SCT or OAT
Common CONDFAN1 MBB Rly 6 OFC1 OFM1,3,5 Circuit
A or
B SCT
or
OAT
1 MM 2
Circuit A Only, M.M. = NO Outputs ON Contactors ON Fans ON Circuit B Only, M.M. = NO Outputs ON Contactors ON Fans ON
Stage
1 CDF.
4 OFC4
OFM4
Stage
1 CDF.
4
OFC4
OFM4
Stage
2 CDF.
3 OFC3
OFM6
Stage
2 CDF.
2
OFC2
OFM2
CIRCUIT B Stage
3 CDF.
4,
CDF.
3 OFC4,
3 OFM4,
6
Stage
3 CDF.
2,
CDF.
4 OFC4,
2 OFM4,
2
CONTROL BOX
COILS Stage
4 CDF.
1,
CDF.
4 OFC4,
1 OFM4,
1,
3,
5
Stage
4 CDF.
1,
CDF.
4 OFC4,
1 OFM4,
1,
3,
5
Stage
5 CDF.
1,
CDF.
3 OFC3,
1 OFM6,
1,
3,
5
Stage
5 CDF.
1,
CDF.
2 OFC2,
1 OFM2,
1,
3,
5
CDF.1,CDF.3,
CDF.1,CDF.2,
Stage 6 CDF.4 OFC3,
4,
1 OFM4,
6,
1,
3,
5
Stage
6 CDF.4 OFC4,2,1 OFM4,2,1,3,5
M.M. = NO
Low Ambient Prestart 1 (OAT ≤ 50F) = Stage 1 Circuit A & B, M.M. = NO Outputs ON Contactors ON Fans ON
Low
Ambient
Prestart
2 ( 50F
< OAT
< 70F)
= Stage
3
Stage
1 CDF.
4 OFC4
OFM4
High Ambient Prestart (OAT ≥ 70F) = Stage 6 Stage 2 CDF.2,CDF.3 OFC2,3 OFM2,6
Allow
Fan
Staging
if
OAT
< 70F
Stage
3 CDF.
1 OFC1
OFM1,
3,
5
Stage 4 CDF.1,CDF.4 OFC1,4 OFM4,1,3,5
CDF.1,CDF.2,C
Stage 5 DF.3 OFC1,2,3 OFM2,6,1,3,5
CDF.1,CDF.2,C
For 100 Ton Only Stage 6 DF.3,CDF.4 OFC1,2,3,4 OFM1,2,3,4,5,6
Whenever Circuit B is ON and
If M.M. = NO Circuit A Only, M.M. = YES Outputs ON Contactors ON Fans ON Circuit B Only, M.M. = YES Outputs ON Contactors ON Fans ON
Minimum
Fan
Stage
= 2
Stage
1 CDF.
3 OFC3
OFM6
Stage
1 CDF.
2
OFC2
OFM2
( Fan
Stage
1 causes
unstable
Operation)
Stage
2 CDF.
3,
CDF.
4 OFC4,
3 OFM4,
6
Stage
2 CDF.
2,
CDF.
4 OFC4,
2 OFM4,
2
Stage
3 CDF.
1,
CDF.
3 OFC3,
1 OFM6,
1,
3,
5
Stage
3 CDF.
1,
CDF.
2 OFC2,
1 OFM2,
1,
3,
5
CDF.1,CDF.3,
CDF.1,CDF.2,
Stage 4 CDF.4 OFC4,
3,
1 OFM4,
6,
1,
3,
5
Stage
4 CDF.4 OFC4,2,1 OFM4,2,1,3,5
56
M.M. = YES Circuit A & B, M.M. = YES Outputs ON Contactors ON Fans ON
Low Ambient Prestart 1 (OAT ≤ 50F)
= Stage
1
Stage
1 CDF.
2,
CDF.
3 OFC2,
3 OFM2,
6
CDF.2,CDF.3,C
Low
Ambient
Prestart
2 ( 50F
< OAT
< 70F)
= Stage
2
Stage
2 DF.4 OFC2,3,4 OFM2,4,6
CDF.1,CDF.2,C
High Ambient Prestart (OAT ≥ 70F) = Stage 4 Stage 3 DF.3 OFC2,3,1 OFM2,6,1,3,5
CDF.1,CDF.2,C
Allow
Fan
Staging
if
OAT
< 70F
Stage
4 DF.3,CDF.4 OFC1,2,3,4 OFM1,2,3,4,5,6
a48-8506
Fig. 7 — Condenser Fan Staging Sequence (cont)