Why do I bother?
[QUOTE=jpsmith1cm;9980312]The biggest reason that you cannot use R410 gauges with R-22 is a matter of resolution. Hard to get an exact pressure reading on R-22 with a gauge that is calibrated for R410.
I know you can prevent contamination and mixing refrigerants if you do things right, purging, etc., which I always do. But why make combination gauges for R22 and R410 when, like you said if the gauge set is calibrated for one or the other you probably wont get exact readings. I'm sure there are new techs that don't purge correctly which can cause some problems when working with both out of the same set. Thats what my original post was eluding to.
Last edited by ColdQuack; 04-22-2011 at 12:00 PM.
Reason: elaborating thought
Do you want my HONEST and UNVARNISHED answer?
Originally Posted by ColdQuack
Because most 'technicians' are stupid and lazy. Good enough IS for them.
IF they can carry a cheap set of gauges to cover every eventuality, then that is the thing they will do.
Precision and accuracy might as well be a foreign language to these jokers.
JP the "crack" was mentioned to cust during progress he thought the fitting was split or cracked . Would not here anything else, like the braze didnt take in one 1tiny area. So wanted total removal and new 1 in. coup. Stupid.Open system for nought.
Repeat after me:
Originally Posted by Realist
"I fixed it, sir or madam."
Leaving out certain details is often in our best interest.
A lesson well learned
it's just a gauge.
theres more to a system than refrigerant pressures.
a good mechanic can walk up to a system with his hand and a nut driver and tell you if its running okay.
my gauges dont come out on every call.
the gauge doesnt know what chemical compound is driving it.
pressure is pressure. 410a or 22
most of the systems i see , the least of your worries is a micro amount of oil cross contamination.
we should be more worried about airflow and clean coils
not to worry about system pressures before that is made correct
take a look at that supply duct
and that evaporator saturated with kitchen grease
if you do not hook your guages up on every call how do u know what the system is doing?Are u one of them guys the customer would tell me that the company before didn't even put guages on.
work to live not live to work.
[One 4 valve digital (DC 1200) set that I am enjoying and still learning on. It is also used also to set the calibration and to pressure test all my stuff.
Worth the investment?
You'll get a LOT of use out of your 1200. A tough as nails tool
Originally Posted by sstumble
well guys you should know that :
if your airflow and heat exchangers are not up to par .....
than your saturated refrigerant temps will be off .....
a moot measurement ....
get the system cleaned up and airflow correct ....
then look and see what the refrigerant is doing ....
how many guys have added gas to a system with a fouled air side?