Name: Weil-McLain WTGO
Brand: Weil-McLain
Rating: 4 (1 reviews)

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Part number 550-141-825/1211

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
- When Calling or Writing about the Boiler2
- Packaged and Non-Packaged Boilers2
Hazard Definitions2
- Table of 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
- WTGO (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
- Lay a Foundation, if Needed9
Install Boiler - Packaged Boilers Only10
- Place Boiler10
- Perform Hydrostatic Pressure Test10
Install Boiler - Non-Packaged Boilers Only12
- Place Boiler12
- Tankless Heater, if Used12
- Perform Hydrostatic Pressure Test14
- Install Jacket (Required on Sizes 7 through 9 Only)14
- Install Boiler Controls14
Install Burner - All Boilers15
- Install Burner (also Refer to Instructions Packed with Burner)15
- For P-WTGO and A-WTGO Boiler15
Connect Breeching16
- General Chimney Requirements16
Connect Water Piping18
- General Piping Information18
- Install Piping18
- DIAPHRAGM Expansion Tank (Figure 9)18
- CLOSED Expansion Tank (Figure 10)18
- To Connect WTGO Boilers to Indirect-Fired Water Heaters18
- Piping MULTIPLE ZONES20
- Piping for Systems Requiring Temperatures below 140°F21
- Use with Refrigeration Systems22
Connect Tankless Heater Piping23
Connect Wiring24
- General Wiring Requirements24
- Junction Box (Furnished)24
- High Temperature Limit24
- 3-Wire Zone Valve Applications24
- Blocked Vent Shutoff Switch27
Connect Oil Piping28
- General Oil Piping Requirements28
Start-Up29
- Fill the System29
- When Using Antifreeze29
- To Place in Operation29
- Burner Adjustments29
Check-Out Procedure30
- Check off Steps as Completed30
- Installation and Service Certificate30
Annual Service Check List31
- Controls Requiring Annual Service31
Detailed Service Procedures32
- Cleaning Boiler Flueways32
- General Description of Control Operation32
Handling Ceramic Fiber and Fiberglass Materials33
Close Clearance Installation34
Replacement Parts36
Dimensions41
Ratings42
Notes43

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Weil-McLain WTGO Specifications

General

Model	WTGO
Category	Boiler
Fuel Type	Natural Gas or Propane
Vent Type	Chimney Vent
Boiler Type	Cast Iron
Operating Pressure	30 psi
Weight	Varies by model
Efficiency	85% AFUE

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Table of Contents

Questions and Answers:

Weil-McLain WTGO Specifications

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