52
1002595 ISSUE 5 M172 VARIHEAT
VARIHEAT AA SYSTEM OWNER INSTALLATION MANUAL
PHASE ROTATION
FOR AA1200 AND 1500
SEE BELOW
BLUE
BLUE/W
HITE
BRO
W
N
RELA
Y 3
FUSE 91
800mA
CAP OFF
UNUSED
CABLES
FUSE 92 160mA
21
22
COMPRESSOR
CONTACTOR
1200 & 1500 THREE PHASE VARIHEATS ONLY
CONTROL MCB
PHASE ROTATION
RELAY
L3
L2
L1
14
11
POWER SUPPLY/
FIRE ALARM AND
FUSE 3
8
5
9
6
L3
L2
L1
R2
R1
TO
FAN
CONTROL
TO
COMPRESSOR
CONTACTOR 21
NOTES
15 = DIN RAIL MOUNTED TERMINAL BLOCK NUMBERS
2. IF REMOTE OCC/UNOCC FEATURE USED
a) FORCE TIME CLOCK TO ‘UNOCCUPIED’
b) 10/11 N/O = ‘UNOCCUPIED’
c) 10/11 N/C = ‘OCCUPIED’
= OPTIONS
L
H
GND
+
-
GND
RS485-1
+
-
GND
RS485-2
CAN
CN1
CN18
CN19
CN2
HMI SCREEN
24V DC
+ - FG COM 1
D
AMPER POSITION
MAIN F
AN SPEED
EXHA
UST F
AN SPEED
MAIN F
AN F
A
UL
T
REMO
TE ON/OFF
OCC/ UNOCCUPIED
R1 FIRE ALARM RELA
Y
FORCE VENTILA
TION
MAIN F
AN FIL
TER BL
OCKED
GND
A01
A02
A03
A04
CN3
COM-D1
DI1
DI2
CN4
COM-D1
DI3
DI4
DI5
DI6
DI7
DI8
AI1
AI2
AI3
AI4
AI5
AI6
AI7
AI8
GND
5V DC
24V DC
CN5
M172
GND
AO
5
AO
6
CN11
AIR TEMPERA
TURE PROBE
HUMIDITY PROBE
AMBIENT TEMPERA
TURE PROBE
FROST PRO
TECTION PROBE
DEFROST TEMPERA
TURE PROBE
RESIST
ANCE HEA
TER F
AN ST
AT
COM-D1
DI9
DI10
DI11
DI12
CN12
CN13
AI9
AI10
AI11
AI12
GND
5V DC
24V DC
POWER SUPPLY
MEMOR
Y CARD
MICRO SD
MAINS
LAMP
RCU RELA
Y
RCU MCB
(IF FITTED)
CONTROL MCB
FIRE ALARM TERMINALS
SWITCHED (230V AC)
(LINK IF NOT USED)
CN16
CN17
FIRE ALARM
RELAY R1
FUSE 93 800mA
RCU V
AL
VE A
RCU V
AL
VE B
230V
230V
230V
RESIST
ANCE HEA
TER A
SS
Y
FAN CONT
A
CT
OR
THERMAL CUT OUTS
TIMER
CONT
A
CT
OR
AIR LPHW V
AL
VE
SEE PREVIOUS PAGE FOR
POWER SECTION
C8
DO8-
DO8
CN6
CN7
D06
DO5
C567
DO7
VOLT FREE TERMINALS
MAXIMUM TOTAL LOAD 500mA
FA
U
LT
FUSE 16 800mA
FUSE 6 800mA
MA
CHINE ON
BOILER GO
FUSE 63 160mA
REMO
TE D
AMPER
DEFROST V
AL
VE
230V
FAN RELA
Y
COMPRES
SOR
CONT
A
CT
OR
R2
R3
RCU
+ + - -
24V DC
24V DC
FUSE 90
2.5A
230V AC
L N E
CRANKCASE
HEATER
(IF FITTED)
L3
L2
L1
R4
N
75
74
4
7
A
1
2
B
9
R2
6
6
8
5
9
78
78
77
79
R4
B
A
57
58
A1
A2
14
13
D
18
16
17
16
DO4
DO3
C34
CN8
CN9
C2
DO2
C1
DO1
CN10
7
6
+ -
AC
DC
V
TOP TERMINALS
HP SWITCH
FUSE 3
800mA
LP SWITCH
SOFT START
(IF FITTED)
LINK IF NOT USED
64
63
56
55
A1
A2
9
6
B
A
CN14
C12
DO12-
DO12
CN15
DO11
DO10
DO9
C91011
20
19
B
A
R3
7
1
14
15
12
13
10
11
50
51
52
53
59
60
0-10V
V+ V-
0-10V
GND
-
+
0-10V
GND
-
+
0-10V
+
GND
-
24
+
STANDARD RELAY FORMAT
1
2
4
3
5
6
8
7
9
A
COIL
B
N/C
N/O
N/C
N/C
COM
COM
COM
N/O
N/O
CONTROL CIRCUIT DIAGRAM AA+LPHW MODELS
Summary of Contents for Variheat AA1200
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