3.3
3.4
3.5
oA
M.
15907-4
TESTING AND BALANCING HEATING AND VENTILATING SYSTEMS
elbows, bends, take-offs, and other turbulence generating devices, to optimize
reliability of flow measurements.
Air Terminal Balancing.
Air Motion: Air motion and distribution shall be as specified and as shown on
Drawings. In addition to air motion measurements, make smoke tests wherever
requested by the Engineer, to demonstrate the air distribution from air terminals, at
no additional cost to the Owner.
Changes in the specified agenda due to field conditions, will be considered for
approval by the Engineer.
WATER SYSTEM PROCEDURES
A. Adjustment: Adjust all heating, bypass, and transfer systems to provide the required
quantity to, or through each component.
B. Metering: Measure water quantities and pressures with calibrated meters.
C. Use venturi tubes, orifices, or other metering fittings installed in system and
pressure gages to measure water flow rates and balance the systems.
D. Adjust the systems to provide the approved pressure drops through the heat transfer
equipment (coils, converters, etc.) prior to the capacity testing.
E. Where flow metering fittings are not installed, determine flow balance by measuring
temperature differential across the heater transfer equipment.
F. Perform measurement of temperature differential with the air system, adjusted as
described herein, in operation.
G. Automatic Controls: Position automatic control valves for full flow through the
heat transfer equipment of the system during tests.
H. Flow: Adjust the flow through bypass circuits at three-way valves to balance that
through the supply circuit.
I. Distribution: Adjust distribution by balancing devices (cocks, valves, and fittings)
and automatic flow control valves as provided. Do not use service valves.
J. | Only record pressure differential where automatic flow control valves are utilized in
lieu of venturi tubes, provided the pressure is at least the minimum applicable to the
tag rating.
K. Special Procedures: Where available pump capacity (as designed) is less than total
flow requirements of individual heat transfer units of system served, full flow may
be simulated by the temporary restriction of flow to portions of the system; specific
procedures shall be delineated in the agenda.
TEST RECORDS
A. Submittal: Submit three (3) copies of the reports described herein, covering air and
water system performance, and air motion (fpm), to the Engineer prior to final tests
and inspection.
B. Instrument Records: Include types, serial numbers, and dates of calibration of all
instruments.
C. Reports: Identify conspicuous items not conforming to Contract requirements in the
reports.
AIR SYSTEM DATA
A. Report: Include in the certified report, for each air-handling system, the following
13089K
