Troubleshooting guide
MAGNUM VERSION 8 MANUAL REVISION 3.1
4
SCROLL STEP 3 (38) Only with HVAC Software ........................................................................................................ 31
6.2.44.
SCROLL STEP 4 (39) Only with HVAC Software ........................................................................................................ 31
6.2.45.
7.
Standard Control Options ............................................................................................................................................. 32
7.1.
G
ENERAL
O
PTIONS
................................................................................................................................................................... 32
7.2.
M
AGNUM
C
ONTROL
Z
ONE
L
OGIC
........................................................................................................................................... 32
Common Definitions ....................................................................................................................................................... 32
7.2.1.
7.3.
V
OLTAGE
S
TEP
C
ONTROL
L
OGIC
............................................................................................................................................. 33
7.4.
V
ARIABLE
C
APACITY
C
ONTROL
M
ETHOD
.............................................................................................................................. 33
Screw Compressor with slide piston ............................................................................................................................... 33
7.4.1.
Compressor with a Variable Frequency Drive (VFD) .................................................................................................. 34
7.4.2.
Example of a system with 3 variable Step Compressors ............................................................................................... 34
7.4.3.
7.5.
C
OMPRESSOR
T
YPES
................................................................................................................................................................. 34
7.6.
C
OMPRESSOR
S
ETUP AND
O
PTIONS
......................................................................................................................................... 35
General Information ........................................................................................................................................................ 35
7.6.1.
Compressor Information setup ....................................................................................................................................... 35
7.6.2.
Circuit Base setup............................................................................................................................................................ 36
7.6.3.
Relay Output Information Screen setup ......................................................................................................................... 36
7.6.4.
7.7.
C
ENTRIFUGAL
C
OMPRESSOR
C
ONTROL
.................................................................................................................................. 37
Centrifugal Related Terminology ................................................................................................................................... 37
7.7.1.
Centrifugal Base Compressor Setup MCS-Config ........................................................................................................ 38
7.7.2.
Typical Relay Output Setup ............................................................................................................................................ 38
7.7.3.
Compressor Speed Control ............................................................................................................................................. 39
7.7.4.
Compressor Vane Control .............................................................................................................................................. 39
7.7.5.
Trane Purifier Purge System Interface .......................................................................................................................... 39
7.7.6.
7.8.
S
PECIAL
P
ATTERN FOR
S
CROLL
C
OMPRESSORS
...................................................................................................................... 41
The following is a sample of the four-compressor setup: .............................................................................................. 41
7.8.1.
Pattern of the four-compressor setup: ............................................................................................................................ 41
7.8.2.
The three-compressor type will be setup in as follows: ................................................................................................. 41
7.8.3.
Pattern of the three-compressor setup: .......................................................................................................................... 42
7.8.4.
Safeties are the same for both compressor types ........................................................................................................... 42
7.8.5.
7.9.
C
OMPRESSOR
A
UTO
R
OTATION
............................................................................................................................................... 42
7.10.
C
USTOM
R
OTATION
.................................................................................................................................................................. 43
7.11.
C
OMPRESSOR
A
NTI
-C
YCLE
L
OGIC
.......................................................................................................................................... 44
7.12.
P
ART
W
IND AND
S
TAR
D
ELTA
S
TARTERS
............................................................................................................................... 44
7.13.
F
ULL
L
OAD
A
MP
(FLA)
CALCULATION AND SLIDE POSITIONING
........................................................................................... 44
7.14.
C
HILLER
B
ARREL
H
EATER
....................................................................................................................................................... 44
7.15.
H
OT
G
AS
B
YPASS
..................................................................................................................................................................... 45
7.16.
C
HILLED
W
ATER
R
ESET
........................................................................................................................................................... 45
7.17.
O
IL
E
QUALIZATION
O
PTION
..................................................................................................................................................... 45
7.18.
L
IQUID
I
NJECTION
O
PTION
....................................................................................................................................................... 45
7.19.
O
IL
C
OOLER
O
PTION
................................................................................................................................................................ 46
7.20.
O
IL
P
UMP
C
ONTROL
O
PTION
................................................................................................................................................... 46
7.21.
O
IL
D
IFFERENTIAL
C
ALCULATION
........................................................................................................................................... 46
7.22.
O
N
/O
FF
S
WITCHES
................................................................................................................................................................... 46
7.23.
L
OW
S
UCTION
U
NLOADING AND
H
OLDING
............................................................................................................................. 47
7.24.
H
IGH
D
ISCHARGE
P
RESSURE
U
NLOADING AND
H
OLDING
..................................................................................................... 47
7.25.
H
IGH
D
ISCHARGE
T
EMPERATURE
U
NLOADING AND
H
OLDING
............................................................................................. 47
7.26.
H
IGH
A
MPERE
U
NLOADING AND
H
OLDING
............................................................................................................................. 48
7.27.
L
OW
W
ATER
T
EMPERATURE
U
NLOADING AND
H
OLDING
..................................................................................................... 48
7.28.
E
NERGY
E
FFICIENT
C
OMPRESSOR
S
TAGING
........................................................................................................................... 48
7.29.
C
HILLED
W
ATER
P
UMP
C
ONTROL
........................................................................................................................................... 49
7.30.
P
ROCESS
P
UMP
(H
EAT
E
XCHANGER
)
C
ONTROL
..................................................................................................................... 49
7.31.
C
ONTROL
P
OWER
R
ELAY
(N
O
S
TOP
) ...................................................................................................................................... 50
7.32.
L
OW AND
H
IGH
A
MBIENT
S
HUTDOWN
.................................................................................................................................... 50
7.33.
I
MPERIAL
,
M
ETRIC
,
AND
C
OMBINED
U
NIT SENSOR READINGS
............................................................................................... 50
7.34.
W
ARNING AND
A
LARM
R
ELAY
O
UTPUTS
............................................................................................................................... 50
7.35.
V
I
P
ORT
C
ONTROL
L
OGIC
(O
PEN
D
RIVE
S
CREW ONLY
) ......................................................................................................... 51
7.36.
O
PERATING
S
CHEDULES
........................................................................................................................................................... 51
7.37.
M
OD
-M
OTOR
L
IMIT
C
ONTROL FOR
F
LOODED
C
HILLER
......................................................................................................... 51