Midco Unipower V1, Installation And Service Instructions Manual, Page: 10 / 40

10
Midco International Inc.
8471 95
Part 1 Installation
V Electrical
Continued
B - Wiring
Instructions
Continued
120V UV Interrupted Pilot Version with Siemens Flame Safeguard
NEUTRAL
120/1/60
HOT
R
R/W
14 13
9
5
12
TEMPERATURE
CONTROL
11
LEGEND
5
SOLID WIRING AND
COMPONENTS BY MIDCO
DASHED WIRING AND
COMPONENTS BY INSTALLER
SOLID ROUND: TERMINAL
BLOCK STRIP
OPEN ROUND: COMPONENT
+
-
R
SCEBM-2
INPUT1
2
1
BL
SCEBM-2
INPUT2
4
3
PILOT GAS VALVE
BLOWER
BL
BR
W
O/W
14
15
BLOWER
16
13
SCEBM-2
FAN
11
12
SCEBM-2
2-10V
14
14
9
9
10
10
O O
W
2 3
TERMINAL STRIP
JUMPERS
6 5
BK
G
Y
R
BL
W
8 1
12
14
13
9
+ +
+ +
5
+ +
8
4 1
+ +
RELAY
SOCKET
B
4
3 6
5
7 2
8
1
RELAY
SOCKET
A
+ +
+ +
+ +
+ +
A
B
R/BK
R
Y W
13
SIEMENS
LME71.000A1
1
X9
-0
4
3
X5
-0
1
2
1
23
X3
-0
2
2
1
X5
-0
3
1
23
4
2
X2
-0
1
3
1
4
3
2
1
X2
-0
2
X6
-0
3
1
3
2
X3
-0
4
1
3
2
45
X2
-0
3
23
1
X1
0-
06
1
2
3
X
10-05
2
1
4
5
X4
-0
2
23
1
4
3
2
1
X7
-0
4
X7
-0
1
1
3
2
PM
E
7
1.
11
1A
1
DISPLAY
OFF - Standby, waiting for
call for heat
P24 - Fan motor on, Actuator
opens in high-fire
P30 - Prepurging
P36 - Actuator closes to
ignition position
P38 - Preignition, Sparking
P40 - Ignition, Gas valve on
P44 - End of safety time
oP - Operation, modulating
operation
.oP - Present output, %
FL. - Flame current, %
Loc - Lockout
P74 - Post purging
BK
X65
1 2
X66
1 2 3
X76
1 2 3 4
X56
1 2 3 4
IGNITION
TRANSFORMER
BL or W
BR or BK
10
BL
R
LOW A/S
R/BK
4
BK
R/W
14
CALL FOR
HEAT
5
9
BR
1
W
8
Y
13 R/W HIGH A/S
HIGH LIMIT
C NC
NO
Y
G
R
ALARM
6
JUMPER
JUMPER NOTE: IF CIRCUIT IS USED;
REMOVE JUMPER
SPARK ROD
MAIN GAS VALVES
8
6
6
7
7
7
BL/W
BR/W
8
8
W
R
W
BL/W
1
G G
BL/W BL
G
G
UV SCANNER
R
W
GAS PRESSURE
SWITCHES
(3)C
(2)NO
(1)NC
(2)NO
(1)NC
(3)C
Y
HI
LO
Y
Y/BK Y/BK
2 3
BK
BK
BK
ON/OFF
SWITCH
FUSE
4 5
BK
BL
Y
24V
SCEBM-2
24VAC
8
7
BL
Y
R
120V
W
O
6 7 8
4 5
Figure 4D: Wiring Diagram for the VA series models
120V UV Interrupted Pilot Version with Siemens Flame Safeguard