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alvintxcouple09 · Jul 21, 2009, 05:09 AM

I have a condesor I believe.. it's a Coleman Evcon DCRS 036B is the model number I believe. Can anyone tell me anything about this unit. Tonnage size, what my guages should be reading to see if I am low, etc..

Thanks
Ben

wmproop · Jul 21, 2009, 09:23 AM

Possible 3 ton unit, as for being low you need to know the ambient temp. plus a whole lot more to correctly determine the refrigerant level

alvintxcouple09 · Jul 21, 2009, 09:29 AM

Well, in Houston, TX, humidity is high... temperature run about 90 degrees.
There has to be a range... too less no cool, too much not efficiently cooling.

The side of the condenser fan says lo 300 high 350.. assuming this is the range to look for on the high side, as the low side could never reach this.

hvac1000 · Jul 21, 2009, 01:02 PM

the side of the condenser fan says lo 300 high 350.. assuming this is the range to look for on the high side, as the low side could never reach this

NO those are test pressures. They have nothing to due with operation.

alvintxcouple09 · Jul 21, 2009, 01:51 PM

Well, if those are test pressures, is there anyway you can tell me how much the unit holds or what pressures I should be looking around in 90-100 degrees temps outside with 80-90 % humidity?

hvac1000 · Jul 21, 2009, 04:34 PM

Not really since each unit is different. The unit should have a listing on it for the number of pounds/ounces that it was shipped with but that will not tell you what the exact charge of the system will be.

The metering device style,outdoor temp,indoor temp,indoor humidity,suction pressure,liquid line pressure, suction line temperature, and liquid line temperature plus the type of refrigerant along with a pressure/temperature chart for the type of refrigerant being used is also needed. The thermometers being used have to be extremely accurate also.

One of the bigger items is weather you need to use superheat or subcooling to do the math and this is determined by the style of flow rater or Thermostatic Expansion Valve (TVX) you have then you will need to know what is the superheat range of the system you are working on.

Most of this work be might be covered at a local HVAC class and BTW you need a EPA certification to attach your guages or remove and dispense the refrigerant. You will also need a recovery machine and approved container to remove any refrigerant is it is overcharged.

NOTE it is illegal to vent refrigerant into the atmosphere.
NOTE if you have guages and you do not know how to use them you need to stop now before you damage your system and violate the law.