Additional Resources
 
1) Follow this link for additional information on HVAC Tech salaries: HVAC Tech Salary
 
 
2) White Rodgers thermostat manual: Thermostat manual 3) The following is a web link to the 2013 version of our main textbook: Modern Refrigeration & AC (2013) 4) REFRIGERATION THERMOSTATS, COLD CONTROLS Remove the thermostat control and set it to the off position. Leave capillary tube connected. Rx1 should show no continuity. Also: Cold control cap tubes contains refrigerant. If the tube is damaged the control switch will not open its contacts to shut down the refrigeration unit. The unit will run continuously. 5) CHECKING A SMALL APPLIANCE'S COLD CONTROL (THERMOSTAT) Picture #1 Picture #2 6) CHECKING SMALL APPLIANCE RELAYS AND COMPRESSORS The overload should have continuity. If the appliance cycles on and off with a click, the compressor relay may be bad. Does it rattle when you shake it? The formula for checking compressor windings: S & C and R & C should equal S & R. The second highest resistance is found between S & C. 7) MINI-REFRIGERATOR SCHEMATIC Schematic 8) OHMS LAW 9) Checking a hot surface igniter (HSI) Silicone Nitride(Match stick shape) 15 - 20 ohms Silicone Carbide ("M" shape) 50 - 90 ohms The following silicone carbide HSI is bad. Why? 10) Refrigerant reclamation services http://goldenrefrigerant.com/ 11) Air handler schematic: Schematic 12) Air handler control board: Picture 13) EPA 608 videos. Remember everything you need is in your printed study guide. Viewing the following videos DOES NOT mean that you do not have to study your study guide! The information in these videos is "icing on the cake!" EPA 608 Core EPA 608 Type I EPA 608 Type II EPA 608 Type III 14) Invoice sent to client after refrigerator repair. Feel free to copy this sample invoice and modify it for your use. STANLEY B SERVICES INVOICE DATE: 03/08/2018 JOB#: 20180308a LOCATION: 100 Main Detroit MI, 48226 CUSTOMER: XYZ resale. PHONE: 313 999-9999 TECHNICIAN: S. Bryant and students. APPLIANCE REPAIRED: Mfg: Haier Model: AE544B Serial: 62005610197 Location: N/A Refrigerant: R134a. Never opened. No access valves. Description: Aficionado 4.4 cf refrigerator. Price when new: $179 @ Home Depot ISSUE/SERVICE: Refrigerator Repair. Before repairs refrigerator would run for about 10 seconds then shut off repeatedly. WORK PERFORMED: Replaced defective components. Verified repair by running the unit for 12 hours. After 12 hours the inside temperature is good (32 degrees at setting 6 of 7). Outside temperature 68 degrees. Cleaned and disinfected interior. Removed scuff marks from exterior. Unit ready for sale. LABOR: $--.-- (Gold Plan Commercial Customer Rate) PARTS: $--.-- TAX (6%): $--.-- TOTAL: $--.-- Thanks for your business! TECHNICIAN NOTES (DO NOT SEND TO CUSTOMER): Classic bad start relay symptoms. Repaired by Randolph students during class on 3/8/2018. 15) Pressure / Temperature Chart apps for your phone or tablet Android phone: Search for then download "Pressure / Temp Chart" from the Play Store iPhone: Search for then download "HVAC PT Chart" from the App Store 16) Condensing unit schematic: Picture 17) The sequence of steps, in their proper order, for a gas fired furnace that uses a HSI ignition are: Power and gas are supplied to the unit The transformer supplies control voltage for all control circuits by converting line in voltage (usually 120v) to 24v The thermostat calls for heat The high limit and perhaps other limits are checked The inducer blower is turned on The inducer blower closes the (air) pressure switch The hot surface igniter (HSI) is turned on The gas valve is opened and the gas ignites as it flows past the HSI The flame sensor senses the flame The blower motor starts 18) Safety Data Sheet (SDS) for R422B a.k.a. NU-22: Data Sheet 19) Health risks at various carbon monoxide levels: CO Levels and Risks 20) Gas leak information: Gas Leaks (Wikipedia) 21) My website (under construction): Website 22) Checking refrigerant charges using superheat and subcool measurements Superheat & Subcool measurements 23) Stanley's Stay Sharp HVAC app. App 24) Chiller basics. Video 25) Mainstream Engineering 608 Type I and Core study guide. Study Guide 26) ESCO 608 study guide. Study Guide 27) Does the EPA REALLY go after individuals for violations? Read this ... I guess this means that if you plan to steal a condensing unit you better take your recovery tank with you or you will face the Feds as well as local law enforcement! 28) 29) GE Profile Water Dispenser Manual
 
2)  White Rodgers thermostat manual: Thermostat manual
 
3) The following is a web link to the 2013 version of our main textbook:  Modern Refrigeration & AC (2013)
 
4) REFRIGERATION THERMOSTATS, COLD CONTROLS
 
Also: Cold control cap tubes contains refrigerant. If the tube is damaged the control switch will not open its contacts to shut down the refrigeration unit. The unit will run continuously.
 
5) CHECKING A SMALL APPLIANCE'S COLD CONTROL (THERMOSTAT)  
 
6) CHECKING SMALL APPLIANCE RELAYS AND COMPRESSORS
 
The overload should have continuity.
If the appliance cycles on and off with a click, the compressor relay may be bad. Does it rattle when you shake it?
 
 
 
The formula for checking compressor windings:
S & C and R & C should equal S & R.  The second highest resistance is found between S & C.
 
 
 
 
 
7) MINI-REFRIGERATOR SCHEMATIC  
  1. Schematic
 
 
8)  OHMS LAW
 
 
 
 
9)  Checking a hot surface igniter (HSI)
 
     Silicone Nitride(Match stick shape)
          15 - 20 ohms
      Silicone Carbide ("M" shape)
           50 - 90 ohms
 
The following silicone carbide HSI is bad.  Why?
 
 
 
10)  Refrigerant reclamation services   http:⁄⁄goldenrefrigerant.com⁄
 
11) Air handler schematic:   Schematic
 
12) Air handler control board:  Picture
 
13)  EPA 608 videos.  Remember everything you need is in your printed study guide. Viewing the following videos DOES NOT mean that you do not have to study your study guide!  The information in these videos is "icing on the cake!" 
14)  Invoice sent to client after refrigerator repair.  Feel free to copy this sample invoice and modify it for your use.
 
STANLEY B SERVICES INVOICE
 
DATE:  03⁄08⁄2018
JOB#:  20180308a
LOCATION: 
     100 Main
      Detroit MI, 48226
CUSTOMER:  XYZ resale.
PHONE: 313 999-9999
TECHNICIAN: S. Bryant  and students.
APPLIANCE REPAIRED:
    Mfg: Haier
    Model: AE544B
    Serial: 62005610197
    Location: N⁄A
    Refrigerant: R134a. Never opened. No access valves.
    Description:   Aficionado 4.4 cf refrigerator.
    Price when new:  $179 @ Home Depot
 
ISSUE⁄SERVICE:
Refrigerator Repair.
Before repairs refrigerator would run for about 10 seconds then shut off repeatedly.
 
WORK PERFORMED:
Replaced defective components. Verified repair by running the unit for 12 hours. After 12 hours the inside temperature is good (32 degrees at setting 6 of 7).  Outside temperature 68 degrees.
Cleaned and disinfected interior.  Removed scuff marks from exterior. Unit ready for sale.
 
LABOR:
     $--.--  (Gold Plan Commercial Customer Rate)
PARTS:
     $--.--
TAX (6%): 
     $--.--
TOTAL: 
     $--.--
 
Thanks for your business!
 
TECHNICIAN NOTES (DO NOT SEND TO CUSTOMER):
Classic bad start relay symptoms.  Repaired by Randolph students during class on  3⁄8⁄2018.
 
15)  Pressure ⁄ Temperature Chart apps for your phone or tablet
16) Condensing unit schematic:  Picture
 
17) The sequence of steps, in their proper order, for a gas fired furnace that uses a HSI ignition are:
 
18) Safety Data Sheet (SDS) for R422B a.k.a. NU-22:  Data Sheet
 
19) Health risks at various carbon monoxide levels: CO Levels and Risks
 
20) Gas leak information: Gas Leaks (Wikipedia)
 
21) My website (under construction): Website
 
22) Checking refrigerant charges using superheat and subcool measurements Superheat & Subcool measurements
 
23) Stanley's Stay Sharp HVAC app.  App
 
24) Chiller basics. Video
 
25) Mainstream Engineering 608 Type I and Core study guide.  Study Guide
 
26) ESCO 608 study guide.  Study Guide
 
27) Does the EPA REALLY go after individuals for violations?  Read this ...
 
I guess this means that if you plan to steal a condensing unit you better take your recovery tank with you or you will face the Feds as well as local law enforcement!
 
28)
 
 
 
29)  GE Profile Water Dispenser Manual

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