3.8
HEATING SYSTEM TESTS
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NOTE: Whenever possible, the testing of heating
systems will be done under adverse winter conditions
and low outside temperatures. The test data
included will be modified as required to suit the
particular heating system.
Select a 4 hour hydrostatic test for radiant floor
heating systems per HYI 400. All other systems
should be tested for 2 hours.
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The Contractor shall submit the Qualifications of the firms in charge of
installation and testing as specified in the Submittals paragraph. Before
any covering is installed on pipe or heating equipment, the entire heating
system's piping, fittings, and terminal heating units shall be
hydrostatically tested and proved tight at a pressure of 1-1/2 times the
design working pressure, but not less than 689 kPa 100 psi. Before
pressurizing system for test, items or equipment (e.g., vessels, pumps,
instruments, controls, relief valves) rated for pressures below the test
pressure shall be blanked off or replaced with spool pieces. Before
balancing and final operating test, test blanks and spool pieces shall be
removed; and protected instruments and equipment shall be reconnected.
With equipment items protected, the system shall be pressurized to test
pressure. Pressure shall be held for a period of time sufficient to
inspect all welds, joints, and connections for leaks, but not less than 2
hours. No loss of pressure will be allowed. Leaks shall be repaired and
repaired joints shall be retested. Repair joints shall not be allowed
under the floor for floor radiant heating systems. If a leak occurs in
tubing located under the floor in radiant heating systems, the entire zone
that is leaking shall be replaced. If any repair is made above the floor
for floor radiant heating systems, access shall be provided for the
installed joint. Caulking of joints shall not be permitted. System shall
be drained and after instruments and equipment are reconnected, the system
shall be refilled with service medium and maximum operating pressure
applied. The pressure shall be held while inspecting these joints and
connections for leaks. The leaks shall be repaired and the repaired joints
retested. Upon completion of hydrostatic tests and before acceptance of
the installation, the Contractor shall balance the heating system in
accordance with Section 15990A TESTING, ADJUSTING, AND BALANCING OF HVAC
SYSTEMS; and operating tests required to demonstrate satisfactory
functional and operational efficiency shall be performed. The operating
test shall cover a period of at least 24 hours for each system, and shall
include, as a minimum, the following specific information in a report,
together with conclusions as to the adequacy of the system:
a.
Certification of balancing.
b.
Time, date, and duration of test.
c.
Outside and inside dry bulb temperatures.
d.
[Temperature of hot water supply leaving boiler] [Steam pressure].
e.
Temperature of [heating return water from system at] [condensate
feed to] boiler inlet.
SECTION 15569A
Page 74
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