Install Boiler - Packaged Boilers Only; Place Boiler; Perform Hydrostatic Pressure Test - Weil-McLain SGO 4 Series Manual

SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 —
Install boiler — packaged boilers only

Place boiler

1. 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 mi-
nor personal injury or property damage.
2. The boiler is shipped for back flue outlet. To change
to top flue outlet (see Figure 5):
a. Remove the jacket cap and the 8.00" diameter
piece of insulation that covers the vent opening
from the top jacket panel.
b. Loosen two (2) screws holding flue cap strap
to collector hood. Remove strap and flue cap
from opening. Re-tighten screws.
c. Check rope placement inside flue cap.
(Read under Step #5 below).
d. Loosen two (2) 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.
e. Place the jacket cap insulation disc in the back
opening of the boiler covering the flue cap.
f. Snap jacket cap in back outlet opening.
Jacket cap and insulation disc must be in
place on boiler to avoid requiring an 18"
minimum clearance from back of boiler
to combustible material.
3. Check level. Shim legs, if needed.
4. Check for secure placement of insulation on tar-
get wall, chamber floor and burner door.
5. Visually check:
a. Flue collector hood seal.
b. Burner mounting door seal.
Obtain gas-tight seal to prevent possible
flue gas leakage and carbon monoxide
emissions, which can lead to severe per-
sonal injury or death.
Tankless heater, if used
1. Remove tankless heater knockout in left side of
jacket panel and, for SGO-6 only, tankless heater
control knockout.
2. Remove tankless heater cover plate and gasket.
3. Install new gasket and tankless heater over studs
around opening. Secure with 3/8" nuts.
4. Install tankless heater operating control where
shown on page 25. If not furnished, use operating
control with maximum 10°F differential.
Part number 550-142-330/0421
SERVICE TECHNICIAN ONLY — read and follow completely.

Perform hydrostatic pressure test

1. Remove steam pressure gauge furnished with boiler. Install water pres-
sure gauge for test only. Be sure gauge can handle test pressure.
2. Install air vent in tapping on top of boiler.
3. Remove pressure control and low water cutoff. Plug tappings.
4. Plug supply and return tappings.
5. Drain valve is already factory-installed.
6. Fill boiler. Vent all air. Pressure test boiler at 45-55 psig.
7. Check for maintained gauge pressure for more than 10 minutes. Visu-
ally check for leaks if gauge pressure drops.
8. Drain boiler. Repair leaks if found.
9. Retest boiler after repairing leaks.
10. Remove pressure gauge, air vent and plugs. Re-install steam pressure
gauge, pressure control and low water cutoff furnished with boiler.
Figure 5
Instructions for Packaged boilers continued on page 18.
Boiler Manual
Do not leave boiler unattended. Cold water fill can expand
and damage cast iron, resulting in severe personal injury,
death or substantial property damage.
Using petroleum-based compounds to repair leaks can dam-
age system components, resulting in property damage.
Change from back flue outlet to top flue outlet (optional)
13