410A refrigerant exposure - health risks? - HVAC-Talk
Feb 18, 2024 · Phosgene gas from burnt/burning refrigerants? There has to be 'chlorine' in the refrigerant chemical makeup in order to create Mustard Gas.
Charging 404A into your system - HVAC-Talk
Mar 13, 2008 · Hi all, I have been getting some mixed signals lately from the mechanics in my shop on charging a system with 404A. Please feel free to correct me if I'm wrong but when you …
demand cooling issue - HVAC-Talk
May 18, 2008 · Had 2 pumps (3ds3a-100L-tfc) trip on demand cooling. Thought I didn't have enough liquid in my receiver but I did. Contacters were good, not single phasing. Demand …
Stuck check valves in hot gas defrost: replace or service?
Jan 4, 2008 · My speculation is that as a 45 F cooler, most likely the hot gas defrost wasn´t needed and therefore shut down. The iddle check valves maybe became stuck shut, and not …
Trane RTU gas burner - HVAC-Talk
Oct 11, 2006 · I was performing heating check-outs today and had a problem with a Trane RTU. The gas manifold pressure calls for -.20wc and I think the supply gas pressure requires min. …
Package Unit - DM120 – Ignition controller code 5 - HVAC-Talk
Jan 26, 2019 · I was doing maintenance on several York package unit late yesterday. Found one heat exchanger with holes - but this unit was OK. This unit (model DM120N20N4AAA1A) was …
Clocked gas meter, non-uniform dial movement - HVAC-Talk
Dec 3, 2014 · I heard about measuring gas flow via clocking the meter and tried it for fun. When the furnace was firing, the half foot dial took on average about 47 seconds/revolution but was …
Is it normal to smell some GAS in the Gas Meter Outside?
Feb 8, 2006 · Sometimes a little gas seeps out. However, if a lot of gas if leaking or it is leaking steady, the diaphragm is probably ruptured and needs to be replaced (whole regulator). …
fin straightener | HVAC-Talk: Heating, Air & Refrigeration Discussion
Feb 9, 2008 · Does anyone know of a coil cleaner product that as the cleaner goes down and thru the coil it straighten out the fin?
Standing pilot gas valve... - HVAC-Talk
Apr 4, 2015 · On a standing gas valve, the pilots lit, there's 24volts to the gas valve, but no lit burner.Is the problem the gas valve or thermocouple?