HVAC-R Service Calls - An Interactive Training Series on CD-ROM and Networks

HVAC-R Service Calls Volume 2
Interactive Training Series

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Audience:
Anyone interested in pursuing a career or furthering their career as an HVAC-R Technician.

Average
Training Time:

2 to 3 hours per volume NOTE

Format/
Product Code:
CD-ROM (MPEG Video)/ DLMRHVC

Produced by:
Delmar Thompson Learning

TOPICS
The series presents interactive instruction covering the following topical areas:

Commercial Refrigeration Service Calls: Part One

Intro to Commercial Refrigeration Service Calls
Medium Temperature Refrigeration
Troubleshooting Steps: Failed fan motor
Troubleshooting Steps: Recharge system and refrigerants

Commercial Refrigeration Service Calls: Part Two

Intro to Commercial Refrigeration Service Calls
Low Temperature Equipment Basics
Troubleshooting Steps: Timer motor service call
Troubleshooting Steps: Recharge the system

Air conditioning service calls: Part One

Intro to Air Conditioning Service Calls
Standard and High Efficiency Air Conditioning
Troubleshooting Steps: Thermostat set too low
Troubleshooting Steps: Dirty condenser

Air Conditioning Service Calls: Part Two

Intro to Air Conditioning Service Calls
Troubleshooting Steps: Refrigerant leak, superheat
Troubleshooting Steps: Not Cooling

PERFORMANCE OBJECTIVES
This course will measure mastery on each of the following performance objectives. Upon completion, workers will be able to...

Troubleshoot Medium Temp Refrigeration Equipment

Recall how many degrees above outside air temperature that air cooled condensers are designed to condense vapor.
Identify box temperatures of medium temperature refrigeration equipment.
Identify the evaporator temperature range for medium temperature refrigeration equipment.
Recall that the evaporator coil in medium temperature refrigeration operates 10-15 degrees colder than the air coming across it.
Identify the air temperature drop across the evaporator coil medium temperature refrigeration.
Explain how defrosting of the evaporator in medium temperature refrigeration equipment is done.

Troubleshoot Low Temperature Equipment

Identify the box temperature of low temperature refrigeration equipment.
Identify the evaporator coil temperature range.
List conditions that could cause high head pressure on a sealed system.
Identify the difference between the box air temperature and the evaporator coil temperature.
Identify the air temperature drop across the evaporator coil.
Identify how low temperature refrigeration defrosting is intiated.
Identify the design sub-cooling temperature for standard air cooled condensers.
Recall that the evaporator fan is turned off during defrosting.

Troubleshoot Central AC Problems

Identify the formula used to determine the amount of super-heat on a sealed system.
Compare high efficiency equipment to stand efficiency equipment.
Describe standard operating conditions under ARI guidelines.
Recall the approximate evaporator coil temperature on air conditioning system which has a standard air cooled condenser.
Recall the approximate condensing temperature of an air conditioning system with a standard air cooled condenser.
Identify the approximate evaporator coil temperature for a high efficiency air conditioning system.
Identify the condensing temperature of an air conditioning with a high efficiency air cooled condenser.

Troubleshoot Central AC Sealed System Failures

Explain how to check for a leak in a system.
Identify the only trace refrigerate allowed by EPA for checking a leaking sealed system.
Recall which procedure is approved for leak checking sealed systems that contain HCFC or CFC refrigerants.
Explain how HFC systems are leak checked.
Explain how to use nitrogen to leak test a system.
Recall the pressure needed to test a sealed system.
Identify the pressure needed to detect a leak.
Explain why a tripped circuit breaker should not be reset more than once.
Explain which acids can be created when a compressor burns out.