Installation manual

3
GAS-FIRED HOT WATER SUPPLY BOILER Boiler Manual
CONTENTS (CONT’D)
Part 8 – Field Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-51
A. Installation Must Comply With
B. Field Wiring Terminations
C. Field Wiring Considerations
D. Line Voltage Wiring for ModCon VWH
E. Alarm Connections
F. Low Voltage Connections for Standard Boiler
G. Tank Sensor or Mechanical Control
H. System/Pipe Sensor
I. Optional High Gas Pressure Switch
J. Optional Low Gas Pressure Switch
K. Flow Switch
L. Wiring of Cascade System Communication Bus
M. ModCon VWH Cascade Master Pump and Sensor Wiring
N. ModCon VWH Cascade Follower Pump and Sensor Wiring
Part 9 – Start Up Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52-54
A. Single Mod Con VWH Boiler
B. Multiple Mod Con VWH Boilers
C. Check for Gas Leaks
D. Condensate Removal
E. Final Checks Before Starting Boiler
F. Cascade System
Part 10 – Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-57
A. Operating Instructions
B. Adjusting the Operating Set Points of the VWH Display
C. Status Menu
D. Test Mode
Part 11 – Start-Up Procedures for the Installer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57-59
A. Programming for the Installer
B. Program Access
C. Program Navigation
Part 12 – Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-63
A. Mod Con Error Code
B. Boiler Error
C. Boiler Fault
Part 13 – Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63-78
A. Maintenance Procedures
B. Combustion Chamber Coil Cleaning Instructions for the Mod Con
C. Maintenance Procedure to Clean Heat Exchanger
Inspection and Maintenance Start-Up Charts