4
TABLE OF CONTENTS
G. Differential Pressure Air Proving Switch/Blocked Vent Safety Shutoff .................................................................................36
H. Draft Inducer ................................................................................................................................................................................37
I. Circulator Pump ............................................................................................................................................................................37
J. Drain Valve .....................................................................................................................................................................................37
K. A.S.M.E. Rated Pressure Relief Valve ........................................................................................................................................37
L. Blocked Vent Safety Shutoff ........................................................................................................................................................37
M. External Condensate Pump (Optional) ...................................................................................................................................37
Water Treatment & Freeze Protection ............................................................................................................... 38
Piping Recommendations ................................................................................................................................................................38
Water Chemistry ................................................................................................................................................................................38
Cleaning the Hydronic System ........................................................................................................................................................39
Freeze Protection ...............................................................................................................................................................................39
Start Up ................................................................................................................................................................. 40
A – Filling Boiler With Water And Purging Air For Systems With Diaphragm Type Expansion Tanks ..............................40
B – Purging Air For Systems With Conventional Closed Type Expansion Tanks: ...................................................................40
C - Placing Boiler In Operation .......................................................................................................................................................41
Check Out Procedure and Adjustment ............................................................................................................... 42
A. Verify Proper Sequence Of Operation ......................................................................................................................................42
B. Inspect Venting And Air Intake System .....................................................................................................................................43
C. Inspect Condensate Drain ...........................................................................................................................................................43
D. Inspect System Piping ..................................................................................................................................................................43
E. Test Ignition System Safety Shutoff Device ................................................................................................................................43
F. Test High Limit Control And Adjust ..........................................................................................................................................44
G. Test Other Safety Controls ..........................................................................................................................................................44
H. Set Thermostat Heat Anticipator (If Used) And Verify Thermostat Operation ..................................................................44
I. Measure The Natural Gas Input Rate ..........................................................................................................................................44
J. Set Thermostat To Desired Room Temperature .........................................................................................................................45
K. Review All Instructions ...............................................................................................................................................................45
Maintanance And Cleaning ................................................................................................................................. 48
Beginning Of Each Heating Season ................................................................................................................................................48
Daily During Heating Season ..........................................................................................................................................................48
Monthly During Heating Season .....................................................................................................................................................49
Periodically During Heating Season ...............................................................................................................................................49
End Of Each Heating Season - Annual Shutdown Procedure .....................................................................................................49
Annual Examination And Cleaning Of Boiler Components.......................................................................................................49
Detailed Sequence Of Operation ........................................................................................................................ 51
Troubleshooting .................................................................................................................................................. 54
Differential Air Pressure Switch Check ............................................................................................................... 62
Repair Parts .......................................................................................................................................................... 64
Summary of Contents for UB90-100
Page 15: ...15 Near Boiler Piping Figure 2 Single Zone Boiler Piping ...
Page 16: ...16 Figure 3 Multi zone Boiler Piping With Zone Valves Near Boiler Piping ...
Page 19: ...19 Figure 6 Diaphragm Type Expansion Tank Piping Near Boiler Piping ...
Page 20: ...20 Figure 7 Conventional closed type Expansion Tank Piping Near Boiler Piping ...
Page 27: ...27 Combustion Air and Vent Pipe Figure 11 Combustion Air and Vent Piping ...
Page 32: ...32 Electrical Wiring Figure 13 Field Wiring Connections ...
Page 53: ...53 DETAILED SEQUENCE OF OPERATION ...
Page 57: ...57 TROUBLESHOOTING CHART 2 TROUBLESHOOTING ...
Page 58: ...58 TROUBLESHOOTING CHART 3 TROUBLESHOOTING ...