Weil-McLain 550-141-826/1201 manual

WGO SERIES 3 OIL-FIRED NATURAL DRAFT WATER BOILER 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. Part No. 550-14[...]

2 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. Indicates presence of hazards that can cause severe persona[...]

3 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

Installations must comply with: • U.S. — State and local plumbing, heating and electrical codes. — National codes where applicable. • Canada — Canadian Standards Association, CSA B139, Installation Code for Oil-Burning Equipment. — CSA C22.1 Canadian Electrical Code Part One. — Applicable local or provincial codes. Before selecting bo[...]

Provide air for combustion and ventilation: Adequate combustion and ventilation air: • Assures proper combustion. • Reduces risk of severe personal injury or death from possible flue gas leakage and carbon monoxide emissions. Do not install exhaust fan in boiler room. Older buildings with single-pane windows, minimal weather-stripping and no va[...]

Place boiler: 1. Remove circulator strapped to pallet. Circulator will be damaged if not removed before boiler is lifted from pallet. 2. Remove boiler from pallet. Do not drop boiler or bump jacket on floor or pallet. Damage to boiler can result. Smaller sized boilers may be top heavy. Use caution when handling to avoid minor personal injury or pro[...]

7 Install Packaged Boiler CONTINUED Change From Back Flue Outlet to Top Flue Outlet (Optional) FIGURE 2[...]

Fiberglass wool and ceramic fiber materials: • POSSIBLE CANCER HAZARD BY INHALATION • CAN CAUSE RESPIRATORY, SKIN AND EYE IRRITATION This product contains fiberglass wool and ceramic fiber materials. Airborne fibers from these materials have been listed by the State of California as a possible cause of cancer through inhalation. Apply special c[...]

3. Non-Packaged WGO-7, 8 & 9 — install flue collector hood (see FIGURE 3): Obtain gas-tight seal to prevent possible flue gas leakage and carbon monoxide emissions, leading to severe personal injury or death. a. Thread tinnerman clip on screw so that clip fits snugly in notch of hold-down lug. Screw must not turn. b. Remove paper on sealing r[...]

Perform hydrostatic pressure test: 1. See FIGURE 4 and Control Tapping Table below to install: a. Boiler drain. b. Water pressure gauge (test only). Be sure gauge can handle test pressure. c. Air vent in upper “N” tapping. d. Plugs in remaining tappings. 2. Fill boiler. Vent all air. Pressure test boiler at 1 times working pressure. For boilers[...]

For P-WGO and A-WGO boiler: 1. Secure universal mounting flange and gasket to burner mounting door. Use three bolts provided. 2. Secure burner on flange with three bolts. 3. Position burner so end of air tube is level to 1 ½ ° tilt downward. Open door to verify burner position. End of air tube should be flush to ¼ " recessed from inside wal[...]

General chimney requirements: • Designed for natural draft firing. Connect boiler to vertical chimney. Insufficient draft can cause flue gas leakage and carbon monoxide emissions, which will lead to severe personal injury or death. • Use vent material approved by local codes for oil-fired burners. In their absence, refer to: — NFPA 31, Instal[...]

Connect Breeching CONTINUED Top Outlet Breeching Connection FIGURE 7 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) 13 Typical Location for Barometric Control (Also see Control Manufacturer’s Instructions) Flue Pipe Bra[...]

General piping information: • If installation is to comply with ASME or Canadian requirements, an additional high temperature limit is needed. Install control in supply piping between boiler and isolation valve. Set control to a minimum of 20°F above set point of combination control. Maximum allowable set point is 220°F. Wire control as shown o[...]

Connect Water Piping CONTINUED Piping with DIAPHRAGM Expansion Tank FIGURE 8 Piping with CLOSED Expansion Tank FIGURE 9 15 Isolation Valve Circulator Automatic Air Vent Relief Valve To Diaphragm Expansion Tank and Fittings From System To System “C” Tapping “N” Tapping Isolation Valve Cold Water Fill Isolation Valve From System Isolation Val[...]

Piping MULTIPLE ZONES: 1. Follow instructions on page 14 and 15 to install piping near boiler. 2. See FIGURE 10 or 11 to complete installation 3. Zoning with circulators: a. Size each circulator to individual circuit requirements. b. Remove circulator (when furnished as standard equipment). c. Install balancing valves to adjust flow to distribute h[...]

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. If system piping is plastic without an oxygen barrier, a heat exchanger must be used[...]

Use with refrigeration systems: • Install boiler so that chilled medium is piped in parallel with heating boiler. Use appropriate valves to prevent chilled medium from entering boiler. Consult I=B=R Installation and Piping Guides. • If boiler is connected to heating coils located in air handling units where they can be exposed to refrigerated a[...]

General wiring requirements: Electric shock hazard. Can cause severe personal injury or death if power source, including service switch on boiler, is not disconnected before installing or servicing. • Installations must follow these codes: — National Electrical Code, ANSI/NFPA 70, latest edition and any additional national, state or local codes[...]

Boiler Wiring for Forced Hot Water FIGURE 15 20 Connect Wiring CONTINUED Limit Control Wiring Harness Circulator Wiring Harness (Not Furnished on “A” Boilers) Service Switch On Boiler Burner Wiring Harness Burner Disconnect Plug[...]

21 Connect Wiring CONTINUED[...]

General oil piping requirements: • Location and installation of oil tanks, oil piping and burners must follow: — NFPA 31, Standard for the Installation of Oil-Burning Equipment. — In Canada, CSA B139, Installation of Oil-Burning Equipment. — Local codes and regulations. — Information provided with burner and fuel pump. • If any part of [...]

Follow information below to prevent severe personal injury, death or substantial property damage: • Do not use gasoline crankcase drainings or any oil containing gasoline. See burner manual for proper fuel oil. • Do not attempt to start burner when excess oil has accumulated, when unit is full of vapor or when combustion chamber is very hot. ?[...]

Check off steps as completed: ❏ 1. Boiler and heat distribution units filled with water? ❏ 2. Automatic air vent, if used, opened one full turn? ❏ 3. Air purged from system? Piping checked for leaks? ❏ 4. Air purged from oil piping? Piping checked for leaks? ❏ 5. Flue cap in place and tightened? Burner door closed, sealed and nut tight? B[...]

Burner adjustments for “P” and “A” boilers: Final burner adjustments must be made using combustion test equipment to assure proper operation. Do not fire boiler without water or sections will overheat. 1. Refer to burner manual for start-up. 2. Allow boiler to heat to design condition. 3. Using combustion test equipment, adjust burner for: [...]

Close clearance installation: Substitute these instructions for corresponding material in manual. All other procedures and practices must remain the same. Recommended service and minimum clearances shown on page 4 should be used where possible. Where closer clearances are required: • Top of boiler — If less than 24" available, provide remo[...]

PROTECTION REQUIRED FOR CLEARANCES LESS THAN 6 INCHES FROM DOUBLEWALL VENT PIPE* DIMENSION A When desired minimum clearance from type “L” doublewall vent pipe to Use the following combustible surface is: protection**: ½" thick insulation board *** 3" over one-inch glass fiber or mineral wool batts+ 24 gauge sheet metal with 2" o[...]

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. Parts List Fig. W-M Sales No. Description Part Number A Regular Front Section 7012 316-700-250 B Wide Intermedia[...]

29 Parts Drawing D H J N H C G G M L P E G F R Q B A K H H[...]

30 30 DIMENSIONS - in. BOILER MODEL NUMBER B L WGO-2 10 1 / 2 13 3 / 4 WGO-3 13 1 / 2 16 7 / 8 WGO-4 13 5 / 8 16 7 / 8 WGO-5 16 7 / 8 20 WGO-6 20 23 1 / 8 WGO-7 23 1 / 8 26 1 / 4 WGO-8 26 1 / 4 29 3 ¼ 8 WGO-9 29 3 / 8 32 1 / 2 DIMENSIONS - mm. BOILER MODEL NUMBER B L WGO-2 266.7 349.2 WGO-3 342.9 428.7 WGO-4 345.9 428.7 WGO-5 428.7 508.0 WGO-6 508[...]

31 31 Dimensions CONTINUED 6 1 / 4 [158.8] 29 9 / 16 [750.9] For 7 DIA. [177.8] Vent Pipe Alternate Return (“A” Boilers Only) 7 DIA. [177.8] Intermediate Back[...]

Ratings * Substitute “P” for completely assembled packaged boiler without burner (WGO-2 through WGO-6 only). Substitute “A” for boiler only for use with approved burners as listed with I-B=R. ** Available only as an “A” unit. (1) WGO boiler designed with convertible vertical and horizontal flue outlet. (2) MBH refers to thousands of Btu[...]