Weil-McLain 550-141-826/1201 - Manual

Provide air for combustion and ventilation: Adequate combustion and ventilation air: • Assures proper combustion. • Reduces risk of severe personal injury or deathfrom possible flue gas leakage and carbonmonoxide emissions. Do not install exhaust fan in boiler room. Older buildings with single-pane ...

Place boiler: 1. Remove circulator strapped to pallet. Circulator will be damaged ifnot removed before boiler is lifted from pallet. 2. Remove boiler from pallet. Do not drop boiler or bumpjacket on floor or pallet. Damage to boiler can result. Smaller sized boilers may be topheavy. Use caution when...

Fiberglass wool and ceramic fiber materials: • POSSIBLE CANCER HAZARD BY INHALATION • CAN CAUSE RESPIRATORY, SKIN AND EYE IRRITATION This product contains fiberglass wool and ceramicfiber materials. Airborne fibers from these materialshave been listed by the State of California as apossible cause of...

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 boil...

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 1½° tilt downward. Open door to verify burner position.End of air tube should be...

General chimney requirements: • Designed for natural draft firing. Connectboiler to vertical chimney. Insufficient draft can cause fluegas leakage and carbon monoxide emissions, which will lead to severepersonal injury or death. • Use vent material approved by local codes foroil-fired burners. In th...

General piping information: • If installation is to comply with ASME orCanadian requirements, an additional hightemperature limit is needed. Install control insupply piping between boiler and isolationvalve. Set control to a minimum of 20°F aboveset point of combination control. Maximumallowable set...

Piping MULTIPLE ZONES: 1. Follow instructions on page 14 and 15 to install piping near boiler.2. See FIGURE 10 or 11 to complete installation3. Zoning with circulators: a. Size each circulator to individual circuit requirements.b. Remove circulator (when furnished as standard equipment).c. Install b...

Piping for systems requiring temperatures below 140°F: In most systems, this type of piping is not required. If system water temperature requirements are lessthan 140°F, such as radiant panels or converted gravity systems, use piping as shown in FIGURE 12 or13. If system piping is plastic without an...

Use with refrigeration systems: • Install boiler so that chilled medium is piped inparallel with heating boiler. Use appropriate valvesto prevent chilled medium from entering boiler.Consult I=B=R Installation and Piping Guides. • If boiler is connected to heating coils located inair handling units w...

General wiring requirements: Electric shock hazard. Can causesevere personal injury or death if power source, including service switch on boiler, isnot disconnected before installing or servicing. • Installations must follow these codes:— National Electrical Code, ANSI/NFPA 70, latest edition and an...

General oil piping requirements: • Location and installation of oil tanks, oil pipingand 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 burn...

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? Bur...

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

Close clearance installation: Substitute these instructions for correspondingmaterial in manual. All other procedures andpractices must remain the same. Recommended service and minimum clearancesshown on page 4 should be used where possible.Where closer clearances are required:• Top of boiler — If l...

Repair parts must be purchased through Weil-McLain for the specific boiler as indicated in the list below. Results from using modified or other manufacturedparts 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...

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. BOILERMODEL 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. BOILERMODEL NUMBER B L WGO-2 266.7 349.2 WGO-3 342.9 428....

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 outl...