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I weighed in charge per nameplate. I will sign up for pro membrship.

I took suction temp at compressor . I did change drier . System failed acid test . I added suction drier and acid away. I pulled deep vacuum. My static pressure was 0.3 total. 0.17 supply. 0.14...

replaced a compressor #1 on a goodman package unit. M#PCB120-3. Unit has txv. After starting and running for 20 min i was getting these readings. comp#1 rla 18.6, 13.1, 13.4 , 14.3. Blwr rla 8.4,...

If the damper is for combustion air.What if the damper fails to open. Don't think dampers are allowed for combustion air by code

What do you guys recommend as a good book on airflow to help better understand phsychometric chart

Have you found srh3 to be reliable and accurate

Do you guys perform a combustion analysis on startups of gas package units we usually just set gas pressures and check for co curious to see who does complete analysis

What are you light commercial guys using for wet bulb on package units would like something accurate with small probe to only drill small hole in in return panel tired of using sling in store

Is that an instant rebate and what if you recently bought a testo
550 would I be eligable for the rebate

Good info Jim I feel more confident in trusting its readings just have to make sure clamp is on pipe correctly and let 550 do the rest

Anyone have issues with the testo 550 temp clamps not being accurate in pac
kage units seems like they not well insulated from airflow

I have to write a lot of measurements on service tickets which I don't mind my problem is I write on small note pad on roof and have messy handwriting then transferring info to ticket is a pain any...

Yeah i was wondering about who would rescue us if we fall off most time there is no one around in the back of buildings I guess need to keep phone handy

The company I work for is now requiring us to wear a body harness attached to a package unit anytime were bringing something up to a roof including filters on pm seem like overkill to me what do u...

need to get a micron gauge. want to get a digital one what do you recommend

thanks for the info. looked at testo vane anemometers they are affordable will buy the 410-2

looking to buy a vane anemometer

im looking at testing at the register

looking to purchase airflow meter to use for residential a/c what do you guys recommend that is not too expensive