Hydrostatic Test - Buderus G315 Assembly, Maintenance And Operating Instruction

7 Hydrostatic Test

Hydrostatic Test
Preparing for the hydrostatic test
• A pop-off relief valve is recommended on cold water
feed line to prevent over pressurization.
• Install return header pipe per instructions on page 13.
• Seal the front ports with blank flanges and gaskets.
• Install return header or flange on the lower tapping
with gasket provided (Fig. 16).
• Install supply header at the top tapping of the rear
section. See Chapter 10, page 20 for details. Install a
temporary air vent (not provided) in one tapping.
• Cap off return and supply headers. (Blank flanges,
gaskets or plugs not provided).
• Install fill/drain valve at the lower rear connection
(Fig. 16).
• Install long shank well into 3/4" tapping of rear section.
• Fill the boiler. Vent the boiler at the air vent until water
appears. Close the vent and pressurize the boiler.
• The assembled boiler shall be subjected to a hydrostatic
test pressure not less than 1
allowable working pressure. The maximum test pressure
shall not exceed the required test pressure by more
than 10 psi.
• If a nipple port connection is leaking, bleed off test
pressure, drain water through the fill/drain valve,
remove the four tie and the return header pipe rods.
• Split the boiler at the leaking joint by driving chisels at
the top and bottom between the sections (Fig. 17).
• Remove old nipples and clean ports as shown on
page 9. Reinstall flue sealing material. Material can be
reused. Reassemble per instructions on pages 10-12.
NOTE:
reassembling the boiler .
• Repeat the hydrostatic test to ensure no leaks.
• Install relief valve after the hydrostatic test.
12
times the maximum
1/2
Always use new push nipples when
3/4" tapping
Supply
header
Return
header
Lower rear
connection
Fill and drain
valve (3/4")
Fig. 16
Chisel
Fig. 17
Chisel