Perform Hydrostatic Pressure Test; Install Jacket (Knocked-Down Boiler Only); Install Boiler Controls - Weil-McLain WGO 4 Series Manual

WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4—
Install boiler –

Perform hydrostatic pressure test

1. See Figure 5 and Control Tapping table 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 1½ times work-
ing pressure. For boilers split and reassembled, test between
75 and 85 psig.
Do not leave boiler unattended. Cold water fill
could expand and damage cast iron, resulting in
severe personal injury, death or substantial prop-
erty damage.
3. Check for maintained gauge pressure for more than 10 min-
utes. Visually check for leaks if gauge pressure drops.
4. Drain boiler. Repair leaks if found.
Do not use petroleum-based compounds to repair
leaks. Damage to system components can result,
causing property damage.
5. Re-test boiler after repairing leaks.
Table 2
Control tappings
Location Size
B1 1½"
Alternate return piping
B2 1½"
C 1½"
E3 ¼"
H ¾"
L ¾"
N ½"
R1 ¾"
14
SERVICE TECHNICIAN ONLY — read and follow completely.
Semi-packaged and Knocked-down boilers only
Function
Return piping
for A/B WGO
Supply piping
Pressure-temperature
gauge
Drain valve
High limit control
Air vent or expansion
tank piping
Relief valve
Boiler Manual
6. Remove pressure gauge, air vent and plugs from tappings
used for controls.
7. Visually check:
a. Sealing rope placement.
b. Metal-to-metal contact around port openings.
c. Flue collector hood seal.
d. Burner mounting door seal.
Obtain gas-tight seal to prevent possible flue gas
leakage and carbon monoxide emissions, which
can lead to severe personal injury or death.
Install jacket
(knocked-down boilers only sizes 7 through 9 only)
Before installing jacket, remove burner mounting door.
See jacket instructions for details.

Install boiler controls

See Control Tapping Table 2 and Figures 5 and Figure 6, page 15
to install controls.
1. Install limit control. If not furnished, use high limit with
maximum 220°F setting.
2. Affix Consumer Protection (CP) number label(s) on jacket
front panel.
Figure 5
Control tapping locations
N
E3
R1
WGO-2
B1 H
Front section
(
continued)
C
L
Back section
Part number 550-142-331/0421
B2