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Chapter 6
- Service Tools & Their Use
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Chapter Start - Table of Co
ntents- Index
The electronic sight glass is an ultrasonic device with two sensors. The sensors
are clamped to a metallic tube (not a hose) carrying refrigerant inside the
system, and connected to an electronic signaling device. The type of refrigerant
metering device used in the system and where you clamp the electronic sight
glass affect how the tester signals to tell you system charge condition.
Chapter Review
• Before servicing an H
VAC system, safety must be taken into
account. Be aware of w
hat safety precautions must be followed atany time during the se
rvicing of an HVAC system.• Basic AC tools consist
of a recovery/recycle station, refrigerant
dispensing valves and
containers, a manifold gauge set, system
service valves, vacuum
pumps, leak detectors, a flushing kit, andheater system service t
ools.• Other equipment used
to service air conditioners includes a pulley
alignment bar, a belt tension gauge, a fin comb, a dial-type or
digital thermometer, a compressor service tool kit, a compressor
oil injector, a torque wrench, a vacuum tester, other special sys-
tem testers, a refrigerant scale, a charging meter, a charging
station, and electronic devices such as electronic digital thermom-
eters/pyrometers, and an electronic sight glass.