Perform Hydrostatic Pressure Test - Weil-McLain 88 Manual

Boiler manual: • Installation

Perform hydrostatic pressure test

Prepare boiler and test:
1. See Figure 10 and Figure 11 for tapping locations. Install:
a. Boiler drain (not furnished).
b. Water pressure gauge — for test only. Be sure gauge can handle
test pressure — see step 3.
c. Air vent in upper tapping (K).
2. Plug remaining tappings.
Do not pressure test with any control installed. Damage
to control can occur due to overpressure.
3. Fill boiler. Vent all air. Pressure test at least 10 minutes at a pressure
not less than the following:
Steam Between 45 and 55 psig
a. boiler:
Water 1½ times maximum allowable working
b. boiler:
pressure
(MAWP) stamped on the boiler nameplate, located
on boiler jacket front panel.
Do not exceed above test pressures by more than 10
psig.
Do not leave boiler unattended. Cold water fill could
expand and cause excessive pressure, resulting in severe
personal injury, death or substantial property damage.
4. Check for maintained gauge pressure and leaks. Repair if found.
Leaks must be repaired at once. Failure to do so can dam-
age boiler, resulting in substantial property damage.
Do not use petroleum-based cleaning or sealing com-
pounds in boiler system. Severe damage to system
components can result, causing substantial property
damage.
5. Drain boiler and remove air vent, boiler drain and gauge. Remove
plugs from tappings that will be used for controls and accesso-
ries.
Figure 10
Boiler tapping locations and sizes (see
Location Size
A 2" Steam relief valve and/or
Skim tapping
B 2" Steam relief valve
L 1" Secondary probe LWCO
C1 & C2 1" Low water cut-offs
C1 —
D1 & D2 1" Alternate low water cut-offs
E1 & E2 ½" Gauge glass
F1 & F2 Try cock tappings
C\,"
G ¾" Pressure limit control,
Pressure operating control and
pressure gauge,
Firing rate pressure control
(when used)
H ¾" Boiler drain (see Figure 17,
page page 15, for system blow-
off (drain) valve locations and
sizes
K 1" —
Part No. 550-100-068/1009
• Start-Up
.
Figure 11)
Steam Water
High limit
Manual reset limit
Water relief valve
Not used — Plug
Alternate low water cut-offs
Combination high and low
limit control
Firing rate temperature
control (when used)
Low water cut-offs
—
—
Combination pressure–
temperature gauge
Boiler drain
Piping to compression tank or
automatic air vent
• Maintenance • Parts
Figure 11
Boiler tappings
11