Weil-McLain WTGO - Table of Contents

Part number 550-141-825/1211
3
GOLD
WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 — Boiler Manual
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 denitions . . . . . . . . . . . . . . . . . . . . .2
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
WTGO (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
Lay a foundation, if needed . . . . . . . . . . . . . .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
Tankless heater, if used . . . . . . . . . . . . . . . 12
Perform hydrostatic pressure test . . . . . . . . . . 14
Install jacket (required on 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
For P-WTGO and A-WTGO boiler . . . . . . . . . .15
Connect breeching . . . . . . . . . . . . . . . . . . . 16
General chimney requirements. . . . . . . . . . . . 16
Connect breeching . . . . . . . . . . . . . . . . . . 16
Connect water piping . . . . . . . . . . . . . . . . . . 18
General piping information . . . . . . . . . . . . . .18
Install piping: . . . . . . . . . . . . . . . . . . . . .18
DIAPHRAGM expansion tank (Figure 9) . . . . . . . 18
CLOSED expansion tank (Figure 10) . . . . . . . . 18
To connect WTGO 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 tankless heater piping . . . . . . . . . . . . 23
Connect wiring. . . . . . . . . . . . . . . . . . . . . . 24
General wiring requirements . . . . . . . . . . . . . 24
Junction box (furnished) . . . . . . . . . . . . . . .24
High temperature limit . . . . . . . . . . . . . . . . 24
3-Wire zone valve applications . . . . . . . . . . . . 24
Blocked vent shutoff switch . . . . . . . . . . . . . 27
Connect oil piping . . . . . . . . . . . . . . . . . . . . 28
General oil piping requirements . . . . . . . . . . . 28
Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fill the system . . . . . . . . . . . . . . . . . . . . 29
When using antifreeze . . . . . . . . . . . . . . . .29
To place in operation . . . . . . . . . . . . . . . . .29
Burner adjustments . . . . . . . . . . . . . . . . . 29
Check-out procedure . . . . . . . . . . . . . . . . . . 30
Check off steps as completed . . . . . . . . . . . . 30
Installation and service certificate . . . . . . . . . .30
Annual service check list . . . . . . . . . . . . . . . . 31
Controls requiring annual service . . . . . . . . . . 31
Detailed service procedures . . . . . . . . . . . . . . 32
Cleaning boiler flueways . . . . . . . . . . . . . . .32
General description of control operation . . . . . . .32
Handling ceramic ber and berglass materials . . . 33
Close clearance installation . . . . . . . . . . . . . . 34
Close clearance installation . . . . . . . . . . . . . 34
Replacement parts . . . . . . . . . . . . . . . . . . . 36
Dimensions . . . . . . . . . . . . . . . . . . . . . . . 41
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 43