Install Instructions

Page 29
Figure 23. - Logic Diagram
7.G Logic Diagram
ROD
FLAME
GND
120VAC (1PH/60Hz)
L1 N
TB2:5A TB2:3A
AUX POWER
BOILER/HEATER
120VAC CONTROL INPUT
CONTROL
24VAC TRANSFORMER
CONTROL
BOILER/HEATER
X1:6
DHW
DHW
HEAT DEMANDS
(24VAC)
TT
TTTB1:1B
TB1:2B
TB1:4B
TB1:3B
X2:5
120VAC
(N)
BLOCKED VENT
SWITCH
SWITCH
ROLL OUT
FIELD
INTERLOCK
(jumpered)
X1:4
TB1:6A TB1:5A
OUTPUTS
POWER
SYS Pump
DHW
DHW
Boiler Pump
TT
TT
Neutral
Neutral
AUX Power
HEAT
DEMANDS
Field
Interlock
WWSD
COM
OAS
FIELD
INPUTS
BOILER PUMP
(N)
120VAC
SYS PUMP
X2:4
PILOT VALVE
X1:2
X1:8
X1:5
MAIN VALVE
24V (N)
24V (L)
24V (L)
SPARK
IGNITOR
GENERATOR
SPARK
J1
WATER TEMP
SENSOR
(FACTORY INSTALLED)
X3:5
POWER VENTER
PROOF OF FAN
(not supplied)
FACTORY JUMPERED
VENT DAMPER
PROOF OF OPEN
X3:2
DAMPER POWER
X3:1
X3:4
CONNECTOR
DAMPER
24V (L)
24V (N)
5
10
9
8
4
3
2
1
6
5
4
3
BA
TB2
2
1
TB1
7
9
8
X4
X1
32
6
5
21
7
X2
1
1
4
5
4
2
1
5
4
3
2
DHW
X3
63
24V (N) PV2
AB
TB2:4B TB2:3B
Connector Details
P1
120VAC OPTIONAL
DHW PUMP RELAY
2A
P2
24VAC OPTIONAL
DHW PUMP RELAY
TB1:7B
24VAC (-)
TB2:1B TB2:2B
TB1:8A TB1:9A
11
12
PV1
PV4
P1:1
P1:2
P1:3
10K OHM
SENSOR
INPUTS
1
2
2
1
2
1
P1
P2
LOGIC DIAGRAM, JX
H2412000-
MINI-THERM JX Residential Boilers
®