Civil Engineering Reference
In-Depth Information
•
Obtain minimum test instruments, as listed below. Without test in-
struments, it is impossible to determine what is actually happening
in each HVAC system. Without this information, repair or addition-
al maintenance requirements cannot be identified.
Table 3-1. Minimum Required HVAC Maintenance Instruments
————————————————————————————————
QuantitytobeEvaluated
Instrument(s)Required
————————————————————————————————
Air temperature and humidity Electronic (digital) sensor
————————————————————————————————
Water temperature Pete's plug insertion thermometer
Surface contact electronic sensor
————————————————————————————————
Air pressure (ductwork) Magnahelic gauges:
0-0.5” wg
0-3” wg
————————————————————————————————
Water/steam pressure Oil-filled gauges:
0-150 ft
0-200 psi
————————————————————————————————
Air flow (ductwork) Pitot tube (with magnahelic gauges)
Anemometer (hot wire or rotating vane)
————————————————————————————————
Air flow (air outlets or inlets) Flow hood
————————————————————————————————
Water/steam flow Typically, must be determined by measuring
pressure drop across a known component
————————————————————————————————
Volts/amps Clamp-on amp meter with voltage
leads (multi-meter)
————————————————————————————————
•
Develop and apply routine maintenance and troubleshooting check-
lists and procedures, including performance tests. These “preventa-
tive maintenance” measures keep the systems and components op-
erating properly, reduce energy waste, and maintain their design
service life.
•
Establish logs and other long term record keeping procedures. By
maintaining data on a regular basis, system changes (and problems)
can be identified early. It is particularly important to keep detailed
Search WWH ::
Custom Search