Table Of Contents - UTICA BOILERS UB90-50 Installation Manual

Introduction ........................................................................................................................................................... 6
Boiler Ratings & Capacities ................................................................................................................................... 7
Boilers For Use At High Altitude ........................................................................................................................... 8
Rules For Safe Installation And Operation ......................................................................................................... 10
Before Installing The Boiler................................................................................................................................. 10
A. Codes .............................................................................................................................................................................................. 10
B. Boiler Sizing .................................................................................................................................................................................. 11
C. Considerations For Boiler Location ........................................................................................................................................... 11
D. Locating The Boiler ...................................................................................................................................................................... 12
E. Combustion Air And Vent Pipe Requirements ........................................................................................................................ 12
F. Condensate Drain Requirements ................................................................................................................................................ 13
G. Foundation Requirements ........................................................................................................................................................... 14
H. Removal Of Existing Boiler From Common Vent System ..................................................................................................... 14
Placing The Boiler ................................................................................................................................................ 15
Near Boiler Piping ................................................................................................................................................ 15
A. Supply And Return Lines ............................................................................................................................................................ 15
B. Pressure Relief Valve .................................................................................................................................................................... 19
C. Expansion Tank And Make-Up Water ....................................................................................................................................... 19
D. Condensate Drain Piping ............................................................................................................................................................ 22
E. Filling Condensate Trap With Water ......................................................................................................................................... 23
F. Chilled Water Piping ..................................................................................................................................................................... 23
Combustion Air and Vent Pipe ............................................................................................................................ 23
A. Connections And Termination ................................................................................................................................................... 23
B. Installation ..................................................................................................................................................................................... 29
Gas Supply Piping ................................................................................................................................................ 29
A. Check Gas Supply ......................................................................................................................................................................... 29
B. Connecting The Gas Piping ......................................................................................................................................................... 30
C. Checking The Gas Piping ............................................................................................................................................................ 30
Electrical Wiring ................................................................................................................................................... 31
A. Electric Power Supply ................................................................................................................................................................. 31
B. Install Your Thermostat ................................................................................................................................................................ 32
C. Connect Circulator Pump Wiring .............................................................................................................................................. 32
Controls and Accessories ..................................................................................................................................... 36
A. Integrated Boiler Control (IBC) ................................................................................................................................................ 36
B. Gas Control Valve ........................................................................................................................................................................ 36
C. Hot Surface Igniter ...................................................................................................................................................................... 36
D. High Limit Aquastat Control ..................................................................................................................................................... 36
E. Draft Inducer Temperature Safety Switch ................................................................................................................................. 36
F. Casting Temperature Safety Switch ............................................................................................................................................. 36

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