Contents
Ultra at-a-glance
(see page 40 and page 42 for details of all models)
The following defined terms are used throughout this manual to bring
attention to the presence of hazards of various risk levels or to important
information concerning the life of the product.
Indicates presence of hazards that will cause severe
personal injury, death or substantial property
damage.
Indicates presence of hazards that can cause severe
personal injury, death or substantial property
damage.
Indicates presence of hazards that will or can cause
minor personal injury or property damage.
Indicates special instructions on installation,
operation or maintenance that are important but
not related to personal injury or property damage.
Hazard definitions
Part number 550-100-090/0809
gas
-
fired
water
boiler
2
Hazard definitions 2
Ultra at-a-glance 2
Please read before proceeding 4
Prepare boiler location 5
Prepare boiler 7
Install water piping 9
Install water piping — typical systems 12
Using with Weil-McLain PLUS water heaters 14
Venting/air piping — general 16
Sidewall vent/air termination: Weil-McLain cap 18
Install vent/air piping — boiler to W-M termination 22
Install condensate line 23
Gas piping 25
Field wiring — basic system 26
U-Control operation and setup 28
Startup — fill the system 31
Startup — final checks 33
Check-out/startup verification 38
The
Gas-fired water boiler, Featuring
Flexibility 40
Prepare boiler — convert for propane 44
Placing boiler — wall-mounting option 46
Install water piping — advanced 48
Sizing direct-connected DHW piping 52
Multiple boiler installations 54
Prepare boiler location — multiple boilers 55
Multiple boiler water piping 56
Venting/air piping — Massachusetts installations 61
Vent/air piping — options 62
Sidewall vent/air termination: 3” PVC concentric 63
Sidewall vent/air termination: Separate pipes 66
Vertical vent/air termination: 3” PVC concentric 69
Vertical vent/air termination: Separate pipes 73
Install vent/air piping — boiler to termination 75
Gas piping — sizing gas lines 77
Field wiring — advanced 78
U-Control operation and setup — advanced 83
Annual startup and general maintenance 92
Annual startup 93
Troubleshooting 99
Maintenance 109
Replacement parts 112
Dimensions 120
Ratings — Ultra boilers 121
Ratings — multiple Ultra boilers 122
Installation and Service Certificate 124