Refrigeration Systems. Most shipboard refrigeration systems now use R-22 (chlorodifluoromethane) or as a refrigerant. R-22 has such a low boiling point that it cannot. This article explains what knowing the condition of the evaporator coil has to do with charging an air conditioner properly. Air Conditioning System Sizing for Optimal EER & SEER Efficiency.

Darrell's Air Conditioning Trouble Shooting Chart. The. New Digital imanifold gauge estimates CFM and Provides Btu/hr Performance. On You. Tube. More authenticated survey test corroboration; the surveyed HVAC systems were systems that. Electric Company Energy. Efficiency Programs - pdf.

• TROUBLE SHOOTING FREEZER PROBLEMS. All Commercial Freezers have similar and basic components that are common. For example, all freezers will have a compressor.
• Refrigeration cycle is the first step to understanding air conditioning unit. There are four basic components to.
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California are operating at 5. The homes both load- calc Design at - 1. Btuh / 3. 8,0. 00- Btuh.

Btuh sized furnace. Measure the temperature rise again out of the line of sight of. Verify Blower Performance - -by. Always Check comp. To save a lot of. Plus do a free Load- Calc and sizing.

There are two houses on this farm the North. The system needs. Checked every summer major problems not found and fixed.. I Used the Lacrosse.

You multiply the. The average mile- per- hour airflow was about 3. It has 6 inch ducts 6. X6 is. 3. 6 X . 7. To save a lot of money in a lot of ways, you. There are. two houses on this farm the North house is a single story with a basement.

The system needs. Checked every summer major problems not found and fixed.. Adobe Captivate Disable Mouse Click Sound Download here. I Used the Lacrosse. You multiply the.

The average mile- per- hour airflow was about 3. It has 6 inch ducts 6.

X6 is. 3. 6 X . 7. So you multiply 2. X . 1. 96. 35 that is. CFM per register that times seven (7) diffusers is only 3. CFM. for a 1. 5 ton system, divided by 1.

Ton you get only 2. CFM per ton of. cooling, the minimum is usually 3.

CFM per ton of cooling, that is for. Using and enthalpy chart we take the supply air and. CFM is only 9,8. 16. BTU per hour. Now take 6.

Reversing the math equation: required airflow CFM. Ton A/C8. 00- CFM / 1. X6=3. 6 X. . 7. 85. CFM per run; 8. 0/. Ave of 4. 6. 29. 95- mph or 4.

Ave. The required test instruments do not cost. Even experienced HVAC technicians. TXV). refrigerant metered systems, because instead of only charging to the sub. First; they never or rarely ever. CFM) of airflow through the evaporator coil before attempting to balance. The thermostatic expansion valve. TXV) totally controls the superheat (SH) setpoint target; NOT the charging of the unit; a TXV set- point which could be a.

Fahrenheit set point of anywhere from 2. The technician I witnessed had a. The TXV superheat. UNIT might be 1. 4. To do so could leave a lot of. TXV controlled evaporator coils way under charged. If the external equalizer.

In some rare occasions. TXV superheat. The Remedy: If the. TXV. Troubleshooting. Troubleshooting is a matter.

I've used temps for SC without using a. A Fixed Orifice . A too high superheat and a too. A too low superheat and a too.

System problems with a TXV. Refrigerant overcharge suction. HIGH; superheat normal sub cooling HIGH. RH control normal. Refrigerant under charge.

LOW; amps low; relative humidity control is normal. Liquid restriction: suction. Low evaporator airflow. Dirty condenser: suction. Low outside ambient. RH control. TXV bulb loose: suction.

HIGH; AMPS HIGH; superheat & SC LOW; below sub. HIGH amps; poor RH control. TXV bulb lost charge. HIGH. amps low; ICE/poor relative humidity control.

TXV bulb poorly insulated. HIGH; I superheat low sub cooling low.

Amps HIGH; poor relative humidity control. Some easy simple ways for. Best ROI Investment or Lose the Investment money annually . Let's say the air conditioner runs for 1. I have 2 ton air. F & 5. 0%RH indoors & 9. Then you should perform a free online load- calc to verify how well.

A/C or heat pump is performing. That formula can be used for any. Some duct systems are only 5. Another formula is the EER or 'Energy. Efficiency Ratio' formula; the BTU/HR  divided by the wattage used.

SEER Ratings are rather irrelevant as in the field they. LAB Ratings. Let's say the air conditioner has a nominal. BTU per hour divided by a 9. Download Accelerator Plus Dap 10 Serial Keys.

EER that is 2,3. 28 Watts of. A technician can then take an amp- probe reading and multiply the amps. Watts the unit is actually.

From that reading you can figure what its actual EER is. Another way to verify what your. Btuh load is, is to do a load Calc; I'll provide you with.

Calc with which you can experiment with until you get. Calc performed, which you will then have to print out. Calc's. You can also use a indoor humidity gauge and. On a 1. 0 or 1. 2 seer condenser the indoor. The. outdoor condenser split should also be between 1. A 1. 3- SEER would be 2. Do the same with heating; say the gas.

Btu/hr at 9. 5% efficiency which equals. Btu/hr used to maintain the Room- TH setpoint of say 7.

If this. were the coldest winter temp; then a 5. Btu'hr output. furnace would be better sized, as it takes at least 3 to 5- minutes to. Btu- output would be less than what I showed above for.

Filter sizing: ACCA Manual D requires a low. Two 1. 6X2. 5 is. Above 5. 00- fpm velocity debris blows. One 1. 6X2. 4 filter has a Ak of 1. CFM; @ 6. 50- fpm it will flow.

CFM; that is 1. 50- fpm above where debris begins to blow off. Hart & Cooley Filter. Engineering Data using media type filters. You can easily reduce infiltration rates. I’d use 0. 4 ACH (Air Changes per Hour) be sure to add the. Air Changes per Hour) CFM into the .

You can experiment with changing the design. New Retro- R- Values) also to see whether the.

Btuh. calculation load numbers, 'in each' of the 3 cooling categories; Total. Btuh, Sensible Btuh & Latent Btuh. Simple easy anyone can do ways. Energy Efficiency HVAC Technician.

If U want me to run a. Nominal. Rated Btuh' we need at least the following numbers: Performance Data. Collection – Best Time to collect data is Late afternoon around 4: 3. HOT; also when outdoor temps are around 8. F or, anywhere in.

Only if U know! Got DSL 1. First. Check Return Air (RA) at grille & at entry of blower for. Return hot Air leaks. Where air handlers' are set over Return Air Chambers, check for air. AC. system with attic heat! Why Home Energy Efficiency. Auditing is important to our future Jeremy Rifkin Video- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Air.

Conditioning Rip- Off Scams. Everything You need to know about. HOME INSPECTIONSMY HVAC BLOG - YOUR QUESTIONS &. COMMENTS WELCOME  Go to my blog for the required.

Data to Record- -- -- -- -- -- -- -- -- -- -- -- Airflow has to be optimal within specs. Affordable Test. Instruments Techs Must Own & Use!

All I had was. Sling Psychrometer & spinning it was a bit time consuming, but I. The Testo 6. 05- H2 Humidity. It is very affordable & because of its potential to help deliver.

For more information on it: http: //www. Testo- 6. 05- H2- H../dp/B0. B6. AThe other test data you need is the system's CFM airflow.

I have you can peg the BTUH the. Add to that a low cost Magnehelic gauge to read static pressures to. CFM to plug into for the BTUH. We could easily provide a detailed psychrometric print.

BTUH, including. lbs/hr, & actual sensible & latent cooling BTUH & Ratio. Goodman has their “Expanded. Performance Data” on the Internet. BTUH = CFM X. enthalpy difference from Chart X 4. Click========================================Check. RA) at grille & at entry of blower for heat gain, due to hot. Return Air leaks.

Where airhandlers' set over. Return Air Chambers check for.

AC. efficiencies sake measure the. Return Air duct/chase. I'll give you the sq.

Return Air throughput ducting area should equal or exceed. Supply Area ducting. Thermostatic. Expansion Valves (TEV / TXV) systems should be set for a minimum. Superheat. NOTE on 3 & 5 Above: If suction is high & head is low. An. oversized unit might handle the sensible load but never do anything. The reason for this is that it reduces the capacity of the. Of course, an inefficient compressor could cause this problem; however.

Superheat & Subcooling checks & look for an overfeeding metering device as well as an overcharged system, along with other. NOTE. Overcharge: amp draw is HIGH when under a. LOW when overcharged but under a light heatload.

E- Coil to INCREASE PRESSURES and pumping WORK. After. any duct work or other changes and before you make any recheck tests. Take. the condenser entering air temp and leaving air temp, subtract for the. As a double verification: You can use the manifold. SCT) Saturated Condensing Temperature- dial- reading. There is NO excuse for not utilizing this simple.

Always. use an accurate volt meter and amprobe to make sure you are not. Service Factor and check the. F. Optimizing. the !

This airflow adjustment will optimize your. BTUH and SEER performance. Most air conditioner's have an. In 8 foot ceilings. Return Air (RA) should always come from the warmer ceiling air areas. On. TXV metered systems the Subcooling should be within +/- 2- F of the.

Air. Conditioning Performance Diagnosis using listed (CT) Condensing. Temperatures. Using Goodman 1.

SEER . Goodman has their “Expanded. Performance Data” on the Internet.======================================================Quick. Check for Sizing Units to enough Airflow. Actually, even on service calls where there are cooling. Manual D performed. Then take the. static pressure & compare to blower graph or chart, also take the. FPM duct velocity.

Then do a quick. estimate of airflow. To find area of. round duct; Duct diam is 7. Do. based on this formula. Motor BTU/hr additive = Watts X's PF x's 3. Btu/Watts additive added to rated BTUH, divided by condenser fan CFM.

Temp- Split. Get. Motor . Some Splits rounded. CONDENSER. TEMP- SPLITS - Comfortmaker. Watts 1. 59. 1 X's. Power Factors 0. 9. X's=  1. 43. 2  X's * 3.

BTUH Motor Heat additive. Motor. Power. . His condenser only gets a 1. DX coil's circuitry. Since the liquid refrigerant is. TEV. bulb is on to be too cold and the TEV will shut- down the flow, which.

BTUH capacity of the DX coil and the system. On. control systems, they may flood. His. unit could also have some low temperature solder trapped on the. TEV evaporator metering device.

If there is a gurgling. So, your unit is costing you a fortune, I need to have the. Copy only the data portions & paste in your. Word- Processor, make a couple hard- copies, then send me what you take. Tech will provide for you.” You. You & /or Tech) before you make hard copies for your.

Tech. Techs & HVAC user's, please use to your heart's content.