Part number 550-141-825/1211
12
GOLD
WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
Install boiler — non-packaged boilers only
Fiberglass wool and ceramic fiber materials are possible cancer
hazards. See warning on page 33.
Place boiler
1. Non-Packaged WTGO-3 through 6 — position on site.
Smaller sized boilers may be top heavy. Use caution when
handling to avoid minor personal injury or property damage.
a. Boiler is shipped for back flue outlet. To change to top flue outlet
(see Figure 4, page 13):
•
Loosen two screws holding flue cap strap to collector hood.
Remove strap and flue cap from opening. Re-tighten screws.
•
Check rope placement inside flue cap. (Read
under
Step #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.
2. Non-Packaged WTGO-7, 8 & 9 — split the assembled block for easier
handling (see Figure 4):
a. Open burner mounting door and, using utility knife, slit floor
insulation at joint to be separated.
b. Remove 5½" draw rod and the longest draw rod from each side.
Pull block apart. Save draw rods, nuts, washers and sealing rings
for reassembly.
c. Move divided block to location.
d. Clean port openings with clean rag.
Do not use petroleum-based compounds to clean openings.
Damage to system components can result, causing property
damage.
e. Place rings in port openings. If ring slips out of groove, stretch ring
gently for several seconds, then place in groove.
f. Position sections so aligning lugs fit into sockets of next section.
Make sure sealing rope is in good condition and in position.
g. Oil threads on draw rods. Install washer and nut on end to be
tightened. Use nut only on other end.
h. 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.
i. 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.
j. Metal-to-metal contact should be made around port openings. If
gap does exist, it should be less than .020”. Check with feeler gauge.
k. 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.
3. Non-Packaged WTGO-7, 8 & 9 — install flue col-
lector hood (see Figure 4, page 13):
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 rope. Starting at back
section near flue collar, position sealing rope
around top of block with adhesive side to sec-
tions. Do not stretch rope. Make sure rope ends
meet. Trim excess rope.
c. Position flue collector hood on top of boiler
sections and over screws and clips as shown in
Figure 4.
d. Install washers and nuts. Tighten nuts until col-
lector hood makes contact with tinnerman clip.
e. Back flue outlet boiler — Position flue cap
and strap over opening in flue collector hood.
Make sure rope in cap is in place and in good
condition. Tighten strap to hood with screws
provided.
Top flue outlet boiler — Position flue cap and
strap over opening in back section.
f. Make sure rope in cap is in place and in good
condition. Tighten strap to boiler with screws
provided in section. Install remaining screws in
holes in flue collector hood.
Tankless heater, if used
1. Remove tankless heater cover plate and gasket.
2. Install new gasket and tankless heater over studs
around opening. Secure with 3/8" nuts, tightening
until metal-to-metal contact is made (20–25 ft-lbs).
