Name: Weil-McLain WGO
Brand: Weil-McLain
Rating: 5 (1 reviews)

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Part number 550-141-826/1014

This manual must only be used by a qualiﬁed heating installer/service technician. BEFORE

installing, read all instructions in this manual and all other information shipped with the

boiler. Perform steps in the order given. Failure to comply could result in severe personal

injury, death or substantial property damage.

• Installation

• Startup

• Maintenance

• Parts

Boiler Manual

Oil-Fired Water Boilers

Using this Manual2
- Packaged and Non-Packaged Boilers2
- Service Technician2
- When Calling or Writing about the Boiler2
Hazard Definitions2
- Table of Contents3
Contents3
Please Read before Proceeding4
- Tips for Water Systems4
Routine Maintenance Schedule5
- Beginning each Heating Season5
- Daily During Heating Season5
- Weekly During Heating Season5
- End of Heating Season5
- Boiler Shutdown5
Operation6
- WGO (See Figure 1)6
Troubleshooting7
Before Installing Boiler8
- Installations Must Comply with8
- Before Selecting Boiler Location8
- Provide Clearances Around Boiler (See Figure 2)8
- Provide Air for Combustion and Ventilation9
- Foundation9
Install Boiler - Packaged Boilers Only10
- Place Boiler10
- Perform Hydrostatic Pressure Test10
Install Boiler - Non-Packaged Boilers Only12
- Place Boiler12
- Perform Hydrostatic Pressure Test14
- Install Jacket (Sizes 7 through 9 Only)14
- Install Boiler Controls14
Install Burner - All Boilers15
- Install Burner15
- (Also Refer to Instructions Packed with Burner)15
Connect Breeching16
- General Chimney Requirements16
Connect Water Piping18
- General Piping Information18
- Install Piping18
- DIAPHRAGM Expansion Tank (Figure18
- CLOSED Expansion Tank (Figure18
- To Connect WGO Boilers to Indirect-Fired Water Heaters18
- Piping MULTIPLE ZONES20
- Piping for Systems Requiring Temperatures below 140°F21
- Use with Refrigeration Systems22
Connect Wiring22
- General Wiring Requirements22
- Thermostat Wiring22
- 3-Wire Zone Valve Applications22
- Junction Box (Furnished)23
- Burner Wiring23
- High Temperature Limit23
Shutoff Switch Option . . . . . . . . . . . . . . . . . .25
Connect Wiring - Blocked Vent Shutoff Switch Option25
- Blocked Vent Shutoff Switch25
Connect Oil Piping26
- General Oil Piping Requirements26
- Oil Piping Connection at Burner26
Start-Up27
- Fill the System27
- When Using Antifreeze27
- To Place in Operation27
Check-Out Procedure28
- Check off Steps as Completed28
- Installation and Service Certificate28
Annual Service Check List29
- Controls Requiring Annual Service29
Detailed Service Procedures30
- Cleaning Boiler Flueways30
- General Description of Control Operation30
  - Automatic Air Vent30
  - Temperature Limit Control30
Handling Ceramic Fiber and Fiberglass Materials31
Close Clearance Installation32
- Burner Adjustments for Packaged and Non-Packaged Boilers32
Replacement Parts34
Dimensions40
Ratings42
Notes43

Model	WGO
Heat Exchanger Material	Cast Iron
Weight	Varies by model
Category	Boiler
Ignition Type	Standing Pilot
Heating Capacity	70, 000 - 260, 000 BTU/h

Weil-McLain WGO User Manual

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