87
107774-01- 9/17
XI. Wiring
(continued)
Figure 11.6: Internal Ladder Diagram
P3‐6
R7910B Boiler Control
+V
J3‐A
J3‐A
‐V
J3‐B
J3‐B
MB1
MB2
Return Sensor
Supply Sensor
Spark
J1‐2
J9‐1
J9‐2
J9‐3
J9‐4
J9‐5
J9‐6
Wiring Legend
R7910B Boiler Control
AT140B
Boiler Pump
System Pump
Gnd
J8‐3
J8‐2
J6‐3
J4‐10
J7‐7
J4‐12
J8‐1
J5‐1
J6‐2
J5‐2
Gas Valve
Sump
Press. Sw.
Ext.
Limit
T1‐5
P2‐4
CH T’stat
T1‐6
T1‐1
T1‐2
Boiler
Flow Sw.
J3‐ECOM1 (D)
J3‐ECOM2 (R)
J3‐ECOM3 (C)
Ignitor
Flame
Rod
Factory Wire Harness
Field wiring
Connector
Screw
Terminal
120VAC/60Hz/1Ph
L3‐1
J4‐4
J4‐6
J4‐2
J4‐7
J4‐5
J4‐3
Combustion Fan
(120V Conn.)
1
3
2
J8‐6
J8‐10
J8‐4
J8‐9
J8‐8
J8‐11
J8‐5
J10‐7
J10‐8
Outdoor
Temp
J6‐7
J6‐8
Flue Gas Sensor
1 (DC+)
2 (Tach.)
4 (PWM)
5 (DC‐)
J2‐3 (Fan PWM)
J2‐4 (DC‐)
J2‐1 (Tach.)
J2‐2 (DC+)
Combustion Fan
(DC Conn.)
T1‐8
T1‐7
Internal, non
replaceable 2 amp
J6‐1
L3‐2
L2‐1
L2‐3
Thermal
Fuse
Ground screw in
boiler J‐box
“Air Proving
Switch”
L
Wire Nut
N
P1‐1
P1‐2
P1‐5
P5‐1
P5‐7
P3‐5
P3‐4
P2‐3
P2‐2
P2‐6 P3‐9
P3‐1
P3‐12
P3‐10
P3‐3
P3‐11
P4‐5
P4‐4
P4‐1
P4‐11
P4‐10
P4‐2
P4‐7
P4‐8
P4‐12
P4‐9
P4‐3
P4‐6
Condensate
Trap
¼” Q.C.
PCB Trace/Components
Ground screw
on boiler frame
3‐Way Zone Valve
DHW
Flow Sw.
DHW Sensor
P5‐9
P5‐6
6.3A Slo
Blow In‐
Line Fuse
BP‐1
BP‐2
ZV‐1
ZV‐2
P5‐4
P3‐8
P3‐7
P3‐2
P2‐1
P5‐2
P5‐5
Panasonic
GT02
Display
SD+
RD+
SD‐
‐5V
+5V
RD‐
DFS‐3
DFS‐2
Note: DHW Thermostat
Terminals (#3 & #4) are not
shown and are not used.
ModBus Connections
(if used)
EnviraCOM
Connections (if used)
Summary of Contents for K2WTC
Page 81: ...81 107774 01 9 17 X Domestic Hot Water Piping continued Figure 10 1 Domestic Hot Water Piping ...
Page 88: ...88 107774 01 9 17 XI Wiring continued XI Wiring continued ...
Page 89: ...89 107774 01 9 17 Figure 11 7 Internal Wiring Connections Diagram XI Wiring continued ...
Page 100: ...100 107774 01 9 17 Lighting and Operating Instructions XII Start Up and Checkout continued ...
Page 141: ...141 107774 01 9 17 XVI Repair Parts continued ...
Page 144: ...144 107774 01 9 17 XVI Repair Parts continued ...
Page 147: ...147 107774 01 9 17 XVI Repair Parts continued ...
Page 149: ...149 107774 01 9 17 XVI Repair Parts continued ...
Page 151: ...151 107774 01 9 17 XVI Repair Parts continued 120 121 122 123 124 125 126 127 ...
Page 158: ...158 107774 01 9 17 SERVICE RECORD DATE SERVICE PERFORMED ...
Page 159: ...159 107774 01 9 17 SERVICE RECORD DATE SERVICE PERFORMED ...