Weil-McLain 550-141-826/1201 - Manual (Page 3)

HOMEOWNER and SERVICE TECHNICIAN — read and follow completely.
Contents
Using this manual . . . . . . . . . . . . . . . . . . . . .2
When calling or writing about the boiler . . . . . . . .2
Packaged and non-packaged boilers. . . . . . . . . .2
Hazard definitions . . . . . . . . . . . . . . . . . . . . .2
Contents . . . . . . . . . . . . . . . . . . . . . . . . . .3
Please read before proceeding . . . . . . . . . . . . . .4
Tips for water systems — . . . . . . . . . . . . . . .4
Routine maintenance schedule. . . . . . . . . . . . . .5
Beginning each heating season . . . . . . . . . . . .5
Daily during heating season . . . . . . . . . . . . . .5
Weekly during heating season . . . . . . . . . . . . .5
End of heating season . . . . . . . . . . . . . . . . .5
Boiler shutdown . . . . . . . . . . . . . . . . . . . .5
Operation. . . . . . . . . . . . . . . . . . . . . . . . . .6
WGO (see Figure 1) . . . . . . . . . . . . . . . . . .6
Troubleshooting . . . . . . . . . . . . . . . . . . . . . .7
Before installing boiler . . . . . . . . . . . . . . . . . .8
Installations must comply with . . . . . . . . . . . . .8
Before selecting boiler location. . . . . . . . . . . . .8
Provide clearances around boiler
(see Figure 2) . . . . . . . . . . . . . . . . . . . . .8
Provide air for combustion and ventilation . . . . . . .9
Foundation . . . . . . . . . . . . . . . . . . . . . . .9
Install boiler — packaged boilers only . . . . . . . . . 10
Place boiler. . . . . . . . . . . . . . . . . . . . . . 10
Perform hydrostatic pressure test . . . . . . . . . . 10
Install boiler — non-packaged boilers only . . . . . . 12
Place boiler. . . . . . . . . . . . . . . . . . . . . . 12
Perform hydrostatic pressure test . . . . . . . . . . 14
Install jacket
(sizes 7 through 9 only) . . . . . . . . . . . . . . . 14
Install boiler controls . . . . . . . . . . . . . . . . . 14
Install burner — all boilers . . . . . . . . . . . . . . . 15
Install burner
(also refer to instructions packed with burner) . . . . 15
Connect breeching . . . . . . . . . . . . . . . . . . . 16
General chimney requirements. . . . . . . . . . . . 16
Connect water piping . . . . . . . . . . . . . . . . . . 18
General piping information . . . . . . . . . . . . . . 18
Install piping . . . . . . . . . . . . . . . . . . . . . 18
DIAPHRAGM expansion tank (Figure 9, page 19) . . 18
CLOSED expansion tank (Figure 10, page 19) . . . 18
To connect WGO boilers to indirect-fired
water heaters. . . . . . . . . . . . . . . . . . . . . 18
Piping MULTIPLE ZONES . . . . . . . . . . . . . . 20
Piping for systems requiring
temperatures below 140°F . . . . . . . . . . . . . . 21
Use with refrigeration systems . . . . . . . . . . . . 22
Connect wiring. . . . . . . . . . . . . . . . . . . . . . 22
General wiring requirements . . . . . . . . . . . . . 22
Thermostat wiring . . . . . . . . . . . . . . . . . . 22
3-Wire zone valve applications . . . . . . . . . . . . 22
Junction box (furnished) . . . . . . . . . . . . . . . 23
Burner wiring . . . . . . . . . . . . . . . . . . . . . 23
High temperature limit . . . . . . . . . . . . . . . . 23
Connect wiring — blocked vent
shutoff switch option . . . . . . . . . . . . . . . . . . 25
Blocked vent shutoff switch . . . . . . . . . . . . . 25
Connect oil piping . . . . . . . . . . . . . . . . . . . . 26
General oil piping requirements . . . . . . . . . . . 26
Oil piping connection at burner. . . . . . . . . . . . 26
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fill the system . . . . . . . . . . . . . . . . . . . . 27
When using antifreeze . . . . . . . . . . . . . . . . 27
To place in operation . . . . . . . . . . . . . . . . . 27
Check-out procedure . . . . . . . . . . . . . . . . . . 28
Check off steps as completed . . . . . . . . . . . . 28
Installation and service certificate . . . . . . . . . . 28
Annual service check list . . . . . . . . . . . . . . . . 29
Controls requiring annual service . . . . . . . . . . 29
Detailed service procedures . . . . . . . . . . . . . . 30
Cleaning boiler flueways . . . . . . . . . . . . . . . 30
General description of control operation . . . . . . . 30
Handling ceramic fiber and fiberglass materials . . . 31
Close clearance installation . . . . . . . . . . . . . . 32
Close clearance installation . . . . . . . . . . . . . 32
Burner adjustments for packaged
and non-packaged boilers . . . . . . . . . . . . . . 32
Replacement parts . . . . . . . . . . . . . . . . . . . 34
Dimensions . . . . . . . . . . . . . . . . . . . . . . . 40
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Part number 550-141-826/1211
3
GOLD
WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Boiler Manual