Mod Con 300 - Page 4

GAS-FIRED BOILER Boiler Manual
3
CONTENTS (CONT’D)
Part 8 – Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-48
A. Installation Must Comply With
B. Field Wiring
C. Line Voltage Wiring for Standard Boiler
D. Alarm Connections
E. Low Voltage Connections for Standard Boiler
F. Thermostat
G. Outdoor Sensor
H. Indirect Sensor
I. Optional 0-10 Volt Building Control Signal
J. Optional High Gas Pressure Switch
K. Optional Low Gas Pressure Switch
L. Optional UL353 Low Water Cutoff Switch
M. Wiring of Cascade System Communication Bus
Part 9 – Start Up Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-52
A. Check/Control Water Chemistry
B. Freeze Protection (when used)
C. Fill and Test Water System
D. Purge Air from Water System
E. Check for Gas Leaks
F. Check Thermostat Circuit(s)
G. Condensate Removal
H. Final Checks Before Starting Boiler
I. Cascade System
Part 10 – Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52-54
A. Operating Instructions
B. Adjusting the Set Point
C. Status Menu
D. Test Mode
Part 11 – Start-Up Procedures for the Installer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-57
A. Programming for the Installer
B. Program Access
C. Program Navigation
Part 12 – Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58-61
A. Mod Con Error Code
B. Boiler Error
C. Boiler Fault
Part 13 – Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-71
A. Maintenance Procedures
B. Combustion Chamber Coil Cleaning Instructions for Mod Con 300/500 Only
Inspection and Maintenance Start-Up Charts