Table Of Contents - UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual

Verify Cont ent s Received ............................................... 2
Ta ble Of Cont ent s .......................................................... 3
Physica l Da t a................................................................. 4
1 - I m port a nt I nform a t ion ............................................. 7
2 - I nt roduct ion ............................................................. 8
2.3 Requirem ents For Com m onwealth Of Massachusetts: 8
2.4 Use Of Carbon Monoxide Monitor ............................8
2.5 Designated Use ....................................................8
2.6 The Unit Must Not: ................................................8
2.7 Operational Features .............................................8
3 - Com ponent List ing ................................................... 9
4 - Loca t ing Boiler ....................................................... 1 5
4.1 Boiler Location Considerations ............................ 15
4.2 Floor Location .................................................... 15
4.3 Clearances ........................................................ 16
5 - Com bust ion Air And Vent Piping ............................. 1 7
5.1 General ............................................................. 17
5.2 Rem oval Of Existing Boiler From Com m on Vent
System ................................................................... 18
5.3 Definitions ......................................................... 18
5.4 Approved Venting Materials ................................. 19
5.5 Vent Term ination ................................................ 19
5.6 Coaxial Venting I nstructions ................................. 21
5.7 Coaxial Vent Screw Placem ent ............................. 22
5.8 Twin Pipe System s .............................................. 23
5.9 Twin Pipe Polypropylene Adapter Kit I nstallation............
5.10 Twin Pipe CPVC Adapter Kit I nstallation ............... 24
5.11 Twin Pipe Polypropylene Adapter Kit I nstallation...........25
5.12 Twin Pipe Cpvc Adapter Kit I nstallation
5.13 Securing Twin Pipe Polypropylene Venting ............ 26
5.14 Flexible Vent System ........................................ 29
5.15 Condensate Piping ............................................ 31
6 - H ydronic Piping ...................................................... 3 2
6.1 General ............................................................. 32
6.2 Special Conditions .............................................. 32
6.3 Safety Relief Valve And Air Vent ........................... 33
6.4 Trim Piping ......................................................... 33
6.5 System Piping .................................................... 33
6.6 External Optional Low Water Cut Off .................... 35
6.7 Manufacturer Recom m endation - Strainer .............. 36
6.8 Central Heating System ....................................... 37
6.9 Frost Protection Mode .......................................... 37
6.11 Pum p Protection ............................................... 37
7 - Ga s Supply Piping .................................................. 3 8
7.1 General ............................................................. 38
7.2 Gas Pipe Recom m endations ................................. 39
7.3 Leak Check Gas Piping ........................................ 41
7.4 Gas Orifice ........................................................ 41
8 - Elect rica l Connect ions ............................................ 4 2
8.1 General ............................................................. 42
8.2 Electrical Connections ......................................... 42
8.3 Access To Connection Block.................................. 43
8.4 Main Supply Connection ...................................... 43
8.5 I nstall Room Therm ostat ..................................... 44
8.6 Outdoor Air Sensor ( OAS) Electrical Connections .... 44
8.7 I ndirect Storage Tank .......................................... 46
8.9 Managem ent Of 0-10v I nput ................................ 46
TABLE OF CON TEN TS
9 - St a rt Up Procedure ................................................. 4 8
9.1 Central Heating System Connections - Heat Only ... 48
9.2 Central Heating System Connections - Com bi......... 48
9.3 System Start Up ................................................. 49
9.4 Fill Condensate Trap With Water ........................... 49
9.5 Control Panel...................................................... 50
9.6 Prior To Com m issioning ....................................... 51
9.7 Com m issioning For The First Tim e ........................ 51
9.8 Autom atic Calibration Function ............................. 51
9.9 Manual Calibration Function: ................................ 52
9.10 De-Aeration Function ......................................... 52
9.11 Changing The Type Of Gas ................................. 52
9.12 Chim ney Sweep Function .................................. 53
9.13 Com bustion Adjustm ent Function (CO2% ) ........... 53
9.14 Check Firing Rate .............................................. 54
9.15 Param eter Settings ........................................... 54
9.16 Description Of Param eters: Factory Settings ......... 55
9.17 Adjusting Maxim um Heating Power ..................... 57
1 0 - Opera t ing I nst ruct ions ......................................... 5 8
10.1 Testing For Gas Leaks And Purging Gas Supply ..... 58
10.2 Boiler Operation ................................................ 58
10.3 Central Heating Mode ........................................ 58
10.4 Dom estic Hot Water Mode .................................. 59
10.5 Frost Protection ................................................ 59
10.6 Pum p .............................................................. 59
10.7 Low Water Pressure Sensor (I nternal) ................. 59
1 1 - Genera l M a int ena nce And Clea ning ...................... 6 0
24
11.1 Beginning Of Each Heating Season ...................... 60
11.2 Maintenance And Routine Servicing ..................... 61
11.3 Com ponent Replacem ent And Cleaning ............... 61
......... 25
11.4 Draining The Boiler ........................................... 62
11.5 Draining The Heating Circuit ............................... 62
11.6 Hydraulic Unit ( DHW) ........................................ 63
11.7 Cleaning The Cold Water Filter ............................ 63
11.8 Final Com m issioning ......................................... 63
11.9 Final Assem bly ................................................. 63
11.10 User I nform ation ............................................. 64
11.11 Safety Flue Therm ostat. ................................... 64
11.12 Flue Pressure Switch. ...................................... 64
11.13 Replacem ent Parts .......................................... 64
1 2 - Ra t ings And Ca pa cit ies ......................................... 6 5
12.1 Ratings And Capacity......................................... 65
12.2 Domestic Hot Water Specifications ...................... 65
12.3 High Altitude Ratings ......................................... 66
12.4 High Altitude Chart............................................ 66
12.5 Available Boiler Pum p Head ................................ 67
1 3 - Trouble Shoot ing .................................................. 6 8
13.1 Error Messages And Resetting The Boiler ............. 68
13.2 Anom alies Table For The I nstaller - Use This Table To
Report The Anom aly Values. ...................................... 70
1 4 - Glossa ry ............................................................... 7 1
Appendix A - W iring Dia gra m s ............................... 7 3 - 7 8
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240013503 REV A, [ 03/ 15/ 2022]