trane RTAB 180

[rickstoys09]

I was working on this chiller today , changing the oil filter and only drained out 2 gallons of oil, this chiller has not been looked at or oil changed for 7 years, after i changed the the filter, and put the vacumn pump on ,then charded the oil lines with oil , i started to pump new oil through the charging valve, but could not over come the pressure in the motor, 100psig, i am thinking my oil pump did not have balls ,or did i overlook the procedure,thanks for some input, on my delema.

[Screwit]

Total oil charge for RTAB108 is just over 4 gallons (16 litres), when you mention your pump could not overcome the pressure in the motor at the charging valve it makes me think you are not familiar with this type of chiller as the oil separator act as the oil sump.

Suggest you familiarise yourself with the attached.

[Healey Nut]

My question would be why are you changing the oil ??? what was the oil analysis ,whats the history of the machine ?? you could be doing more harm than good .. JMHO

PS I think you mean an RTHB

[mallron]

RTAB??? This one is news to me, post a pic if you can.

[Screwit]

Sorry my bad,

If you are working on a watercooled screw I agree it is most probably an RTHB180 and my previous post does not apply, but if you working on anaircooled screw out of Europe it would most probably be an RTAB108.

Regardless I agree with Graham routine changing of the oil is not required unless oil analysis results dictate otherwise.

Mallron, typical RTAB picture on page 4 of the IOM in my previous post or in the attached

[rickstoys09]

Total oil charge for RTAB108 is just over 4 gallons (16 litres), when you mention your pump could not overcome the pressure in the motor at the charging valve it makes me think you are not familiar with this type of chiller as the oil separator act as the oil sump.

Suggest you familiarise yourself with the attached.

i was wrong in the model #it is a RTHB

[MKnyc]

I've changed many a RTHB oil filters, I have never drained that much oil unless you also drained the oil. No need to change the oil unless tests shows nfg. Now your gonna hafta add 2 gallons of oil. Run the chiller full unloaded for 1/2 an hour. Get the discharge superheat nice and hot. Then sight the oil level by the condenser barrel. Lemme know how far up the level is. Screw chillers are tricky.

[MKnyc]

Total oil charge for RTAB108 is just over 4 gallons (16 litres), when you mention your pump could not overcome the pressure in the motor at the charging valve it makes me think you are not familiar with this type of chiller as the oil separator act as the oil sump.

Suggest you familiarise yourself with the attached.

My bad, went to the I.O.M. gotta sight the oil level off the end of the motor cuz it acts as a sump too. Tried to upload the IOM

[Healey Nut]

[QUOTE=. Run the chiller full unloaded for 1/2 an hour.

RTHB is R22 . running unloaded will not bring the oil back . You need to run it LOADED for 1/2hr then shut it down and check the oil using the method in the IOM RTHB IOM 1 section 10-2

[arkiandev]

Is there a IOM or SB that details doing a oil change? How low of suction pressure should I run the machine when pumping down?

[Screwit]

Is there a IOM or SB that details doing a oil change? How low of suction pressure should I run the machine when pumping down?

Yes this is covered in the IOM, with regards to changing the oil post #3 raises the question on this.

[arkiandev]

Can you, would you send me a copy of the IOM?