Ashworth College Community : Activity - HVAC Group

Stephanne Foster created HVAC Position! Plano, TX area!

community@ashworthcollege.edu — Fri, 17 May 2013 18:53:35 GMT

Energy Experts

Part time helper with installation and repair of AC, furnace, Duct work, coils.

Position location is Plano, TX with calls all over the Dallas Metroplex.

Must have valid drivers license.

Position starts immediately

Resume's can be emailed to Mags Duke at dm4duke@yahoo.com or call 469-231-7730 and ask for Mags.

Dennis Scott replied Re: stumped

community@ashworthcollege.edu — Thu, 16 May 2013 03:05:41 GMT

Hi Hong,

When converting to R410a from R-22 and using the same line set it is necessary to horoughly clean out the system by flushing it, the procedure is as follows:

1.Use Pro Flush solution or R-11 kit and safety equipment including gloves and goggles.

2. Recover the R-22 from the system.

3. Disconnect any power leads.

4. Using a tubing cutter, cut the suction and liquid line at both the condenser and evaporator.

5. Temporarily connect the liquid and suction lines at the evaporator using clear plastic tubing and hose clamps.

6. Put a clean container at the outlet of the liquid line at the condenser to catch solvent and contaminants as they are purged from the system.

7. Connect the Flush can or Pro-Flush using the hose.

8. Connect the refrigeration service hose to the can valve and to the suction line outside with injection tool and adapters.

9. Invert the Flush can or Pro Flush and dispense a 15-20 second burst. Inspect the clear tubing at the evaporator and look for liquid. If no liquid is present continue 15 seconds until liquid is observed. Follow Pro Flush with a regulated supply of dry nitrogen and push the solvent into the receiving container while observing the condition of the material. When you see that he solvent is clear, the flushing is complete. Follow with a dry nitrogen purge.

10. Connect the line set to the new evaporator and condenser and evacuate and leak check and charge per factory specifications.

You are also concerned about the size for a heater for your 1700 sq ft home. Many things need to be taken into consideration when sizing a unit, you do not want it undersized nor oversized. When getting the total BTU you need the cubic ft of the house. Also heat is transmitted through walls, ceilings, floors, windows, moisture content, air leakage, insulation. The size of the unit must give enough heat to keep the occupied space at a comfortable temperature and humidity. There is no standard 1 ton per 500 sq ft, each bldg is different and needs an individual heat load calculation.

rayv voted Temperature Change

sfoster@ashworthcollege.edu — Thu, 16 May 2013 02:21:07 GMT

What is the best temperature to leave your thermostat during the Summer?

hphamrf12 replied Re: stumped

community@ashworthcollege.edu — Wed, 15 May 2013 19:50:45 GMT

Hi Dennis,

How to use a flush starter kit?

and How do I know how many Kwatt for furnace to heatup 1700sf home?

Thanks,

Hong

Stephanne Foster created HVAC Employment Opportunity with Sears!

community@ashworthcollege.edu — Mon, 13 May 2013 17:23:31 GMT

HIRING EVENT for Residential Appliance and/or Refrigeration Repair Technicians

Apply online or contact Michele Heidari prior to attending our Job Fair/Hiring Event.

Melville

Sears Service Office

35 Melville Park Road, Suite 200

Melville, NY 11747

Friday, May 17, 2013

10:00AM to 2:00PM

Apply Online to this posting prior to arrival

www.searsholdings.com/careers

Please contact Michele at Michele.Heidari@searshomepro.com or 407-551-5549 for additional information and/or link to apply.

Requirements:

1) Must have Full-Time Availability.
2) Must be able to pass Pre-Hire Testing:

Basic Electricity Test & Customer Service Skills Questionnaire

3) Must also be able to pass a Background Check & Drug Screen.
4) Must have a Clean Driving Record.

Nebil Tozri created library

community@ashworthcollege.edu — Sun, 12 May 2013 17:56:56 GMT

i just would like to know if can we use the documents and library after graduation?.. Thanks

♥nene♥ replied Re: Got a 100 on my First 3 test

community@ashworthcollege.edu — Sat, 11 May 2013 11:41:06 GMT

your welcome

Dennis Scott replied Re: stumped

community@ashworthcollege.edu — Sat, 11 May 2013 02:28:01 GMT

Hi mvalenciarf13,

First of all no question is stupid and you are smart for wanting to fully understand everything before moving on, and by applying yourself and studying hard you will achieve the maximum and become a great HVAC technician.

A Ton of refrigeration is based upon the melting of one pound of ice at 32 degrees which requires the addition of 144 BTU. A ton of refrigeration is the heat absorbed by the melting of a ton (2000) of ice in a 24 hour period. The total amount of heat involved is 144 times 2000 = 288,000 BTU. The number 288,000 BTU per 24 hours is rather clumsy to use. However when divided by 24, it becomes 12,000 BTU per hour, which is a convenient and familiar figure for practical use. 1 Ton = 12,000 Btu

Many other students read questions also and this information is of help to them, so no question is too small or too big.

You had mentioned amps, I am uncertain where that comes into play, please be more specific and I can help you more.

18,000 Btu divided by 12,000 Btu = 1.5 Tons

Dennis Scott replied Re: Certificate

community@ashworthcollege.edu — Sat, 11 May 2013 01:52:06 GMT

Hi joebeecool,

Congratulations on completing the HVAC course, you should be receiving your certificate very soon. Contact the student help desk and/or student services to be certain everything has been taken care of and wishing you a very successful career in the HVAC industry. The phone number to contact is 1-800-224-7234.

mvalenciarf13 created stumped

community@ashworthcollege.edu — Fri, 10 May 2013 16:19:43 GMT

OK i know this is probably a stupid question but I must ask. Questionb19;chapter 8 pageb112 test your knowledge. How many tons of refrigeration effect can be obtained from a window air conditioner rated a 18,000 But/hr? I guess I miss read are something but i never seen where you can find this out. Just how to remove each hr&min. The answer was 1&a half ton. How do you get that?