Table of Contents
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WTGO
Installer: • Make sure this is the correct manual for the boiler. Verify boiler model on
rating label.
• Leave all documentation received with boiler and burner with unit for
future reference.
User: Boiler and burner must be installed and serviced by qualified service technician.
SERIES 3 OIL-FIRED NATURAL DRAFT WATER BOILER
This Manual
Includes:
Installation
Start-Up
Boiler Parts
As an EVERGY STAR Partner, Weil-McLain
has determined that this product meets the
ENERGY STAR guidelines for energy efficiency
550-141-825/1201
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Summary of Contents for Weil-McLain WTGO Series
- Page 1 Includes: Installation Start-Up Boiler Parts As an EVERGY STAR Partner, Weil-McLain has determined that this product meets the ENERGY STAR guidelines for energy efficiency Installer: • Make sure this is the correct manual for the boiler. Verify boiler model on rating label.
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Page 2: Read This Page First
Read This Page First Hazard Definitions The following terms are used to bring attention to the presence of hazards of various risk levels or to important information concerning product life. Indicates presence of hazards that will cause severe personal injury, death or substantial property damage if ignored. -
Page 3: Table Of Contents
Table of Contents Read all instructions before installing. Failure to follow all instructions in proper order can cause severe personal injury, death or substantial property damage. Read This Page First ......2 Table of Contents . -
Page 4: Before Installing Boiler
Before Installing Boiler Installations must comply with: Provide clearances around boiler • U.S. (see FIGURE 1): — State and local plumbing, heating and electrical codes. Jacket cap must be in place on — National codes where applicable. boiler to avoid requiring an 18" •... - Page 5 Before Installing Boiler CONTINUED Provide air for combustion and ventilation: • Through horizontal ducts — at least 70 sq. in. per 1 GPH boiler input (1 sq. in. per 2000 Btu input) of all fuel-burning appliances plus Adequate combustion and requirements for any equipment that can pull air ventilation air: from room (including clothes dryer and fireplace).
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Page 6: Install Packaged Boiler
Install Packaged Boiler Place boiler: Perform hydrostatic pressure test: 1. Remove circulator strapped to pallet. 1. Remove relief valve installed in boiler. 2. Install air vent in “N” tapping on top boiler. Circulator will be damaged if 3. Plug supply and return tappings. not removed before boiler is 4. -
Page 7: Install Packaged Boiler
Install Packaged Boiler CONTINUED Change From Back Flue Outlet to Top Flue Outlet (Optional) FIGURE 2... -
Page 8: Install Non-Packaged Boiler
If corrections Re-tighten screws. are made and gap still exists, contact your 2) Check rope placement inside flue cap. Weil-McLain distributor or sales office before continuing installation. (Read under Step #3 on page 9.) -
Page 9: Install Non-Packaged Boiler
Install Non-Packaged Boiler CONTINUED 3. Non-Packaged WTGO-7, 8 & 9 — install flue d. Install washers and nuts. Tighten nuts collector hood (see FIGURE 3): until collector hood makes contact with tinnerman clip. Obtain gas-tight seal to prevent e. Back flue outlet boiler — Position flue possible flue gas leakage and cap and strap over opening in flue collector carbon monoxide emissions, leading to severe... - Page 10 Install Non-Packaged Boiler CONTINUED Perform hydrostatic pressure test: Obtain gas-tight seal to prevent possible flue gas leakage and 1. Refer to FIGURE 4 and Control Tapping Table carbon monoxide emissions, which can lead to to install: severe personal injury or death. a.
- Page 11 Install Packaged and Non-Packaged Boiler Install burner (also refer to instructions packed with burner): Burners designed for use with Weil-McLain 68 boilers must not be used on GOLD Oil boilers. Contact individual burner manufacturers for GOLD Oil applications. For P-WTGO and A-WTGO boiler: from inside wall of burner door refractory.
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Page 12: Connect Breeching
Connect Breeching General chimney requirements: MINIMUM CHIMNEY SIZE TABLE • Designed for natural draft firing. Connect MINIMUM boiler to vertical chimney. BOILER MINIMUM I=B=R MINIMUM MODEL BREECHING CHIMNEY SIZE CHIMNEY Insufficient draft can cause flue NUMBER DIAMETER RECT. ROUND HEIGHT gas leakage and carbon WTGO-3 5"... - Page 13 Connect Breeching CONTINUED Typical Location for Barometric Control (Also see Control Manufacturer’s Instructions) Flue Pipe Bracket (One on Each Side of Pipe) Back Outlet Breeching Connection FIGURE 6 Typical Location for Barometric Control (Also see Control Manufacturer’s Instructions) Flue Pipe Bracket (One on Each Side of Pipe) Top Outlet Breeching Connection FIGURE 7...
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Page 14: Connect Water Piping
Connect tank from “N” tapping shown in ½" FIGURE 9 to expansion tank. Use N.P.T. piping. Pitch any horizontal piping up towards For multiple-boiler piping, refer to Weil-McLain’s “Primary/Secondary Piping Guide.” tank 1 inch per 5 feet of piping. WATER PIPING SIZE TABLE * •... - Page 15 Connect Water Piping CONTINUED Circulator Isolation Valve Automatic Air Vent System “C” Tapping “N” Tapping Isolation From Valve System Relief Valve Cold Water Fill To Diaphragm Expansion Tank and Fittings “B1” Tapping *Circulator *Alternate Pump Location Piping with DIAPHRAGM Expansion Tank FIGURE 8 Closed Type Expansion Tank...
- Page 16 Separate relay is required for each circulator. 4. Zoning with zone valves: a. Install balancing valves to adjust flow to distribute heat to all zones. b. Separate transformer is required to power zone valves. Refer to “Weil-McLain Zone Valve Wiring Guide” for details. Legend:...
- Page 17 Connect Water Piping CONTINUED Piping for systems requiring temperatures below 140°F: In most systems, this type of piping is not required. If system water temperature requirements are less than 140°F, such as radiant panels or converted gravity systems, use piping as shown in FIGURE 12 or 13.
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Page 18: Connect Tankless Heater Piping
Connect Water Piping CONTINUED Use with refrigeration systems: • Install boiler so that chilled medium is piped in Supply parallel with heating boiler. Use appropriate valves Exp. Tank to prevent chilled medium from entering boiler. Consult I=B=R Installation and Piping Guides. Circ. - Page 19 Connect Tankless Heater Piping CONTINUED Studies have indicated that TANKLESS HEATER RATINGS TABLE dangerous bacteria can form in potable water distribution systems if certain BOILER INTERMITTENT INLET minimum water temperatures are not maintained. MODEL HEATER DRAW RATINGS AND OUTLET Contact local health department for more information. NUMBER NUMBER (GPM)*...
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Page 20: Connect Wiring
Connect Wiring General wiring requirements: Junction box (furnished): • Junction box houses electrical connections for all boiler components. Electric shock hazard. Can cause • “P” boilers have harnesses furnished. severe personal injury or death if • “A” boilers are furnished with burner and limit power source, including service switch on boiler, harnesses. - Page 21 Connect Wiring CONTINUED...
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Page 22: Connect Oil Piping
Connect Oil Piping General oil piping requirements: • Do not use Teflon tape as an oil pipe sealant. It can cause • Location and installation of oil tanks, oil piping valves to fail, creating hazards. Do not use and burners must follow: compression fittings. -
Page 23: Start-Up
Start-Up Follow information below to • When using antifreeze: prevent severe personal injury, death or substantial property damage: Do not use automotive, ethylene glycol, undiluted or petroleum- • Do not use gasoline crankcase drainings or based antifreeze. Severe personal injury, death any oil containing gasoline. -
Page 24: Check-Out Procedure
Check-Out Procedure Check off steps as completed: 8. Test additional field-installed controls: If boiler has a low water cutoff, additional 1. Boiler and heat distribution units filled high limit or other controls, test for with water? operation as outlined by manufacturer. Burner should be operating and should go 2. -
Page 25: Appendix
Appendix Burner adjustments for “A” and “P” boilers: To connect WTGO boilers to Weil-McLain PLUS indirect-fired water heaters: Final burner adjustments must be Install and wire per water heater manual provided made using combustion test with water heater. equipment to assure proper operation. Do not fire boiler without water or sections will overheat. - Page 26 Appendix CONTINUED To provide close clearances as described in pages 26 and 27, Close Clearance Kit, W-M Part No. 386-500-050, must be obtained and installed as described below. Failure to use kit or install as described can result in a fire hazard, causing severe personal injury, death or substantial property damage.
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Page 27: Appendix
Appendix CONTINUED PROTECTION REQUIRED FOR CLEARANCES LESS THAN 6 INCHES FROM DOUBLEWALL VENT PIPE* Dimension A When desired minimum clearance from Type “L” Combustible Surface doublewall vent pipe to Use the following combustible surface is: protection**: ½" thick insulation board *** 3"... -
Page 28: Parts List
Parts List Repair parts must be purchased through Weil-McLain for the specific boiler as indicated in the list below. Results from using modified or other manufactured parts will not be covered by warranty and may damage boiler or impair operation. -
Page 29: Parts Drawing
Parts Drawing... -
Page 30: Dimensions
Dimensions DIMENSIONS - in. BOILER MODEL NUMBER WTGO-3 13 1/2 16 7/8 WTGO-4 13 5/8 16 7/8 WTGO-5 16 7/8 WTGO-6 22 1/8 WTGO-7 23 1/8 26 1/4 WTGO-8 26 1/4 29 3/8 WTGO-9 29 3/8 32 1/2 WTGO Front DIMENSIONS - mm. - Page 31 Dimensions CONTINUED Intermediate Back...
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Page 32: Ratings
Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pick-up. Water ratings are based on a piping and pick-up allowance of 1.15. An additional allowance should be made for unusual piping and pick- up loads. Consult local Weil-McLain Sales Office. I=B=R gross output...
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