View Full Version : Traulsen unit
05-25-2005, 08:26 PM
Hello, my partner and i was working on a traulsen unit model# G22010. The complaint was that the box was warm, so discovered that the evaporater fans were not running. One of the clip on switches(yellow) thats attached to the evaporator was open preventing the fans from running, exactly what are these two switches and was he right to jump it out.Thanks
05-25-2005, 09:14 PM
freezer i assume. fan on delay probably. bypass for now if it works, replace asap
05-27-2005, 03:04 AM
need to rule out the refrigeration circuit before you condemn that fan delay. Fans are supposed to stay off until that switch sees 25degrees approx or less. If your pumper aint making cold enough the fans will never start.
Originally posted by gbfromsd
If your pumper aint making cold enough the fans will never start.
Hope the newbies don't see this. Cuz ya just can't MAKE cold.
05-27-2005, 10:37 AM
Originally posted by gbfromsd
need to rule out the refrigeration circuit before you condemn that fan delay. Fans are supposed to stay off until that switch sees 25degrees approx or less. If your pumper aint removing enough heat thereby lowering the coil temperature, the fans will never start.
Does that look better? :)
You asked if your partner was right in jumpering a therm-o-disc. Well ... if he knew what he was doing and was a good Mentor, no he did not do right.
Simply because he didnt explain himself to you very well.
The temp switches are there for a reason. A very good reason.
And to just jump it out when you dont understand it's function does not make any sense!
Take a piece of paper and draw yourself a simple ladder diagram of how the fan receives it's power.
There is a time clock to initiate defrost.
There is a therm-o-disc in series with that clock.
If a load isn't running and the switch is suposedly on, then you simply work out from the power source until you find the "OPEN" in the circuit.
In your case, it was the fan-switch.
You can set a probe next to the therm-o-disc and read the temp which the switch is feeling.
If the system has just returned to cooling and only minutes have elapsed since the evap coil was hot .... your not going to have fans just yet. The coil is still too warm.
Watch that temp probe drop in degrees and you should see this steadily take place.
Around fifteen degrees, above zero, the therm-o-disc should snap closed and allow power to flow to the fans in the evaporator.
Keep it simple.:)
Your partner may or may not be a good tech. We weren't there to see how he, or she, handled it.
And most good tech's dont share what they are doing. They keep their knowledge to themselves.
A Mentore though, is a different story.
Their job is to convey knowledge to you in order to enable you to do what they can do.
At work this week, two new men were hired on.
So my partner in pipe fitting and I were split up.
He and I were equal in skills.
He got one new man who had some schooling and little field experience.
I got a man who hasnt used a torch in fifteen years. Didnt even see a need for a torch for nothin'. Save for plumbing work, soft solder.
Had never worked with ACR copper nor uni-strut.
After forty hours of production work this last week, plus some punch list jobs .... I had my new partner welding and fitting joints and practically running over me to get the punch list done!
And the other new guy .... he hasnt even lit the torch for his partner. He hasnt welded a single joint.
His lead does all of that instead!
Simply put ... he is not a teaching type of mechanic! He is not a Mentor type of service man.
Oh sure, I had to take things slow in order to explain what I was doing and whyI was doing it ... for my new partner's sake.
But he is picking this stuff up like gang-busters!
And which team do you think will be more productive by project's end?
Sharing information in an apropriate manner is always the most valuable method.
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