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64
From Electrical "E1"
+
"+"‐ORG‐18
SUPPLY TEMP
BOILER TEMP
RETURN TEMP #1
500 Ohm 1/4W
U4
GND
U3
U2
U1
c.pCO
J2
U6
U5
GND
U10
U9
U8
U7
FUEL LEVEL
U10 ‐ BLACK
FT1
TT1
TT2
TT3
WHT
WHT
WHT
U3‐BLK
U2‐BLK
U1‐BLK
G0
G
c.pCO
J1
+
‐
"‐"‐GRY‐18
RETURN TEMP #2
RETURN TEMP #3
RETURN TEMP #4
TT4
TT5
TT6
WHT
WHT
WHT
U6‐BLK
U5‐BLK
U4‐BLK
GND
RETURN TEMP #5
RETURN TEMP #6
TT7
TT8
WHT
U9‐BLK
U8‐BLK
U7‐BLK
GND
ID2
ID1
c.pCO
J8
‐
(11)
(14)
ID1‐RED
R5
ID2‐RED
‐
"‐"‐GRY‐18
"‐"‐GRY‐18
E‐STOP ACTIVE
SYSTEM OFF REQUEST
(14)
(11)
R4
‐
"‐"‐GRY‐18
LOW GLYCOL LEVEL
Red LED
Green LED
O
N
1
2
3
"‐"‐GRY‐18
C
C1/2
NO2
NO1
c.pCO
J10
3
1
NO1‐BLUE
NO2‐BLACK
‐
From Electrical "E1"
NO5
NO4
NO3
c.pCO
J11
‐
NO3‐ORG
NO4‐ORG
‐
‐
"‐"‐GRY‐18
"‐"‐GRY‐18
"‐"‐GRY‐18
C3/4/5
"+"‐ORG‐18
+
R3
(A2)
(A1)
R2
(A2)
(A1)
R1
(A2)
(A1)
BLOILER ENABLE
CIRC PUMP
SYSTEM OFF DELAY
NO6
C6
c.pCO
J12
NO5‐ORG
Tw
TR
THERMOSTAT TERMINALS
ON TOP OF BURNER ASSEMBLY
"+"‐ORG‐18
+
INTERIOR LED LIGHT
‐
"‐"‐GRY‐18
"+"‐ORG‐18
"‐"‐GRY‐18
EXTERIOR LED LIGHT
"+"‐ORG‐18
+
COOL DOWN
LED‐4
From Secondary contacts
on Main Power Switch SW1
Y1
O
N
4
3
2
1
45s
CW
0‐10V
Se
㐃
ngs
ARA659 Actuator
+
Y
N
Y1‐BLACK
+ BROWN
‐ BLUE
+
‐
CON2
Y1‐BLACK
"+"‐BROWN
"‐"‐BLUE
+
+ BROWN
NO1‐BLUE
NO2‐BLACK
CON3
BEACON
CON1
BLUE
BLACK
BLUE
CON4
NO6‐BLACK
C6‐BLUE
NO6‐BLACK
C6‐BLUE
SW6
SW7
Low Voltage Schematic
Electrical Page 3 of 3
TCH250
0.00
INITIAL RELEASE
LB
25MAR2019
REV.
DESCRIPTION
DATE
REVISED
0.01
Flame Loss Mods
LB
22MAY2019
250 Ohm
(14)
(11)
R6
BURNER FLAME
30 Ohm