Perform Hydrostatic Pressure Test; Install Jacket (Required On Sizes 7 Through 9 Only); Install Boiler Controls - Weil-McLain WTGO Installation And Start-Up Manual

WTGO
GOLD OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 —
Install boiler — non-packaged boilers only

Perform hydrostatic pressure test

1. Refer to Control Tapping Table 2 and Figure 5 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.
6. Remove pressure gauge, air vent and plugs from tappings
used for controls.
Table 2
Control tappings
Location Size
B1 1½" Return piping
B2 1½" Alternate return piping for
A/B WTGO
C ¾" Supply piping
E3 Pressure-temperature
1/4"
gauge
H ¾" Drain valve
L ¾" High limit control
(in tankless heater cover
plate)
N ½" Air vent or expansion tank
piping
R1 ¾" Relief valve
14
SERVICE TECHNICIAN ONLY — read and follow completely.
Figure 5
Function
R1
Boiler Manual
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
(required on 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), Figure 5, and Figure 6 to install
controls.
1. Install tankless heater control if tankless heater is used. If
not furnished, use operating control with maximum 10°F
differential.
2. Install limit control. If not furnished, use high limit with
maximum 220°F setting.
3. Affix CP number label(s) on jacket front panel.
Control tapping locations
N
C
E3
L
B1
H
Front section
(continued)
B2
Back section
Part number 550-141-825/1211