Commercial Air Conditioner
Model: heat pump, 10SEER UNITS
33
a system and safely stores it in a department of Transportation (DOT) approved container until it is
re-used or returned for reclaim.
The authors of the EPA regulations enforcing the Clean Air Act realized that an accidental release of the
refrigerant may happen in the course of normal service. Any such incidents that happen while making
“good faith” attempts to recover refrigerant would be considered .Always use procedures so as not to
release any refrigerant .Purging the hoses to clear them of air is an example. The latest refrigerant hoses
have a valve within twelve inches of their ends .The entire hose does not have to be purged .
When performing service on a refrigerant system, charging should be done using the best service
practices ,ensuing that the least amount of refrigerant needed is used.
After fabrication and installation of the lines, do not flush a line set with refrigerant., venting refrigerant to
the atmosphere subjects both the installer or the technician and their employer to federal fines. Lines
must be evacuated before charging with refrigerant.
Each installer and technician must be informed on the provisions of the clean Air Act and understand the
impact on the installation and service of the refrigerant systems. Each technician must be certificated
under an approved program .Failure to properly handle refrigerant may cost technician’s job and also a
stiff fine. Up to $25,000 may be charged for a pattern of disregards, concerning this very important
federal law.
WARNING : FOR YOUR OWN PROTECTION ,ALWAYS HAVE A RECOVERY/RECYCLING DEVICE
PRESENT WHEN DOING REFRIGERANT SERVICE.
TEST EQUIPMENT
The following test equipment is recommended to properly service air conditioning equipment:
1.A good quality volt/ohm meter;
2.A two-temperature electronic thermostat;
3.A Magnetic Gauge (capable of reading to 3” W.C.)
4.A Gauge manifold set
5.A clamp-on ammeter.
6.An electronic leak detector or bottle of soap suds.
7.A micron meter (not shown)
8.A vacuum pump capable of pulling to 2000 microns;
9.Refrigerant recovery /recycling equipment
NOTE
: Carry and store any test equipment in a manner to prevent damage.
vacuum pump
Fig.10-1
Before beginning any troubleshooting procedure ,complete the following installation checklist. An
equipment problem is sometimes caused by an improper installation. By completing this checklist the
problem may be found and corrected .Make copies of the checklist and complete one for every air
conditioning system call for your records.
10.2 INSTALLATION AND SERVICE CHECKLIST
(Refer to the unit installation instructions for the specifics)
ELECTRICAL
………….Correct the thermostat and subbase
………….Correct thermostat mode and setting
………….Correct line supply voltage for indoor and outdoor units
………….Proper equipment ground to the electrical panel
