Carrier 30hx don't have oil heater

[foxlin]

Dear sir,

Does anybody have experience that Carrier 30hxc has low oil level problem? Its oil system does not have oil heater, thanks.

[chilbrig]

Have never had any problems because of the lack of an oil heater, and over all have had very few oil problems with these chillers.

[jon304j]

When operating conditions are within design parameters there is no need for heaters on them. I have placed a strap on heater on a few I take care of that sit in a low ambient condition off line, but even then it marginal on the need.

[foxlin]

But York YS and YR series chiller all use with oil heater within oil separator to keep temperature 40~46 degree C

[gyhooyabat]

Foxlin,
That particular machine would not need a heater in the seperator. The seperator is at the bottom of the condenser barrel. Are you by chance making ice with this machine?

The oil pump draws from the bottom of the condenser barrel (or oil sump if you could see the inside of it) when it runs. After the compressor starts and runs for 120 seconds, the oil pump shuts down and the oil is drawn up to the compressor due to pressure, so don't be surprised to see the oil pumps off most of the time.

By the way, our 30GX machines would have an oil seperator tank with a heater, but that's because it's an outside machine with air cooled condenser. Believe the machine you have is a water cooled condenser usually located inside a building, but would need the complete model number to be sure of that?

Let us know if you have any other questions. We're here to help.

[chilbrig]

Foxlin
Why don't you tell us what kind of problems you are having.

[foxlin]

Sorry for the late reply. I am talking about Carrier 30HXC water cooled screw chiller for air conditioning ,the whole series are without oil heater. My concern is oil return and oil & refrigerant separate as chiller starting. Carrier 23XL screw chiller uses oil heater ,so does York YS and YR screw chiller,why Carrier 30HXC does not? Carrier 30HXC is a global chiller which means it will sell to cold area and temperature is lower than 50F in winter. Even in my country(Taiwan),50F is possibile in winter. The only difference is that oil separator of Carrier 30HXC is located inside the condenser and the others are a stand-along tank. Maybe the temperature inside building is warmer, shouldn't temperature of oil to keep in 104F~115F like York?

[techtalker]

The oil heater on the 23XL screw compressor was only used on the smaller sized units (200 tons and lower). The large screw chillers never had an oil heater, and don't need one.

The 30HX units do not require an oil heater either. The air temperature is not the issue. Because this unit uses synthetic oil, viscosity is not the issue.

Most of the time the oil heaters are used to get rid of entrained refrigerant in the oil sumps. Carrier found a way that this is not required, so we don't add one. the compressor can handle a lot of refrigerant in the oil without problems.

Up here in the Northeast US, it can get pretty cold (today is warm, only about 32F). there are quite a few units running now in this area supplying brine to ice skating rinks without any problems starting, running, etc.

And the 30HX units have been around for at least 8 years now!

[mike grabowski]

our sevice manager had a broblem with one 2 years ago. the init went down with low oil. he called a carrier tech out( who fried the board thet controled the oil pump) when they got the new board the tech just wanted him to add oil to get rid of the condition. i believe he ended up replacing the oil filters also. i believe that was the root of the problem. i was told that the carrier manual tells you to change the oil filters after the first year of service or something like that.

[mike grabowski]

have the oil filters been changed on this machine? ever?

also you can get the controls startup, operation, service and trouble shooting online at carrier.com. i bet the carrier factory mechanics get a more detailed book though.

[jon304j]

Believe me, theres no different book available on the 30 series besides the SOM book thats current. There was a "not for distribution" what if scenario packet that was out that covered alot of issues on pic and early comfort link stuff.

[gyhooyabat]

Mike,
You can find the literature on our commercial web site.

Yes, the factory trained techs get thicker books with all the changes, etc. But those books are included to everyone who attends our training sessions throughout the year. Those classes are usually held by the local distributor.

Here is the link to the manual I think your looking for. If we knew the serial number we would know for certain what series you have. The web site is commercial.carrier.com and then click on literature and then service. If you do a search for your model chiller it will offer several series of that machine.

Hope this helps?

30GXN,GXR080-528, 30HXA,HXC076-271 Air-Cooled and Fluid Cooled Chillers with ComfortLink" Controls, Series 4, 50/60 Hz, Start-Up, Operation, Service and Controls Troubleshooting Guide
Est. Download Time: 4 Minute(s)

[gyhooyabat]

Let's try that link again, huh???

http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/30g,h-8t.pdf

Hope it works this time.