Weil-McLain 550-141-826/1201 - Manual (Page 12)

SERVICE TECHNICIAN ONLY — read and follow completely.
Install boiler — non-packaged boilers only
Fiberglass wool and ceramic fiber ma-
terials are possible cancer hazards. See
warning on page 31.
Place boiler
Non-Packaged WGO-2 through 6 —
position on site
Smaller sized boilers may be top heavy.
Use caution when handling to avoid mi-
nor personal injury or property damage.
Boiler is shipped for back flue outlet. To change to top
flue outlet (see Figure 3):
1. Loosen two screws holding flue cap strap to collec-
tor hood. Remove strap and flue cap from opening.
Re-tighten screws.
2. Check rope placement inside flue cap.
(Read under Step #3 on page 13.)
3. Loosen two screws on back flue outlet. Set flue cap
on outlet. Install strap by engaging slots in screws.
Tighten screws. Make sure cap is securely installed.
Non-Packaged WGO-7, 8 & 9 — split the assembled
block for easier handling (see Figure 4, page 13)
1. Open burner mounting door and, using utility knife, slit floor insula-
tion at joint to be separated.
2. Remove 5½" draw rod and the longest draw rod from each side. Pull
block apart. Save draw rods, nuts, washers and sealing rings for reas-
sembly.
3. Move divided block to location.
4. Clean port openings with clean rag.
Do not use petroleum-based compounds to clean openings.
Damage to system components can result, causing property
damage.
5. Place rings in port openings. If ring slips out of groove, stretch ring
gently for several seconds, then place in groove.
6. Position sections so aligning lugs fit into sockets of next section. Make
sure sealing rope is in good condition and in position.
7. Oil threads on draw rods. Install washer and nut on end to be tightened.
Use nut only on other end.
8. With wrench at washer/nut end, uniformly tighten nuts starting with
5½" rod at large port, 5½" rod at small port, bottom long rod and
finally top long rod.
9. Torque on both 5½" rods and bottom long rod should be 50-60 ft. lbs;
long top rod should be 20-25 ft. lbs. Do not back-off nuts.
10. Metal-to-metal contact should be made around port openings. If gap
does exist, it should be less than .020". Check with feeler gauge.
11. If gap around port openings exceeds .020", check for dirt on port
openings, sockets or misaligned lugs. If corrections are made and gap
still exists, contact your Weil-McLain distributor or sales office before
continuing installation.
Part number 550-141-826/1211 12
GOLD
WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Boiler Manual