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Switch Panel Wiring:
1.
Run 16-gauge wires from the switch panel to the elec-
tronic controller.
NOTE: It is recommended that the wire colors illustrated in
Appendix A be used when installing the switch panels.
This will ensure installation consistency, differentiate
between the separate switches and assist service person-
nel with troubleshooting.
Reference Appendix B for proper wire-gauge sizing.
2.
Strip and crimp insulated female terminals onto each
wire at the switch panel location.
NOTE: Be sure to attach "Jumper Wires" where necessary.
Reference Figures 32 and 33.
3.
Connect all switch wires to the appropriate switch con-
nections as illustrated in Figures 32 and 33. Reference
Appendix A for additional wiring information.
4.
Insert all switch wires into the appropriate terminal/
switch panel connection on the electronic controller.
Reference Appendix A.
Switch
Pin # 1
Pin # 3
Pin # 5
Switch to Electronic Controller
NOTE: The Engine Preheat and Electric Element switches possess
Figure 33
450-DE Interior Switch Panel Rear View
Engine Preheat
Switch
3
5
4
1
Electronic Controller
Switch
to "Preheat-O"
Pin # 1
to "Preheat-I"
Pin # 4
to Chassis Ground
Pin # 5
Switch to Electronic Controller
connections
Jumper Wires, which advance from Terminal 3 to Terminal 4.
© 2008 Aqua-Hot
®
450-DE/DM Hydronic Heating System Installation Manual
Section 5: Switch Panel
450-DM Interior Switch Panel Rear View
Electric Element
Switch
5
4
Switch
Electronic Controller
Pin # 1
to "Electric-O"
Pin # 3
to "Electric-I"
to Chassis Ground
Pin # 5
Diesel-Burner
Electric Element
Switch
Switch
3
5
5
4
4
1
Electronic Controller
Switch
to "Electric-O"
Pin # 1
to "Electric-I"
Pin # 3
to Chassis Ground
Pin # 4
Pin # 5
connections
Switch to Electronic Controller
Diesel-Burner
Switch
3
3
5
4
1
1
Switch
Electronic Controller
Pin # 1
to "Diesel-I"
Pin # 3
to "Diesel-O"
Pin # 4
to "IND-LT (+) B3"
Pin # 5
to "IND-LT (-) B6"
Figure 32
3
1
Electronic Controller
to "Diesel-I"
to "Diesel-O"
to "IND-LT (+) B3"
to "IND-LT (-) B6"
connections
— Page 23 —
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