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Tuesday, September 29, 2015

Wexten COID-12PTS (Inverter-Type) Oil Chiller Replaces Kanto Seiki MPSB-07 Oil Chiller on Mori Seiki MH-500

September 2015

Wexten COID-12PTS (Inverter-Type) Oil Chiller Replaces Kanto Seiki MPSB-07 Oil Chiller on Mori Seiki MH-500

Wexten COID-12PTS Oil Chiller

We received a call from a customer looking for a chiller to replace the Kanto Seiki MPSP-07 chiller on his Mori Seiki MH-500 HMC.

Kanto Seiki MPSB-07

Kanto Seiki Label

The customer mentioned that the machine builder did have a replacement available, but the price was very high.

We crossed the specifications over to a Wexten COID-12PTS oil chiller and the customer purchased it as a replacement for the Kanto Seiki MPSB-07 for a much lower cost.

Kanto Seiki MPSB-07

Cooling Capacity: 3.480 kW( KCAL/Hr,  BTU/Hr) @ 60Hz

Circulation Pump Flow Rate: 28.8 l/ min @ 60Hz

Weight: 100kg

Temperature Control: + 1.0° C

Wexten COID-12PTS

Cooling Capacity: 3.488kW (3000 KCAL/Hr, 12000 BTU/Hr) @ 60Hz

Circulation Pump Flow Rate: 30l/ min @ 60Hz

Weight: 107 kg

Temperature Control: + 0.1° C

With some modifications (extension) to the wiring and hoses, the Wexten chiller could have been placed on the floor behind or next to the MH-500. However, the customer's preference was to have it installed where the Kanto Seiki MPSB-07 chiller had been; mounted to the rear of the machine. This presented two problems:

1. The Kanto Seiki chiller was mounted to the machine in an unusual way. The bulk of the weight was sitting on a small piece of the machine casting that extended from the back of the machine and also by a large angle bracket that was bolted to the LH edge of the chiller and also to the back of the machine casting.

2. The mounting bracket for the way-lube unit was bolted to the underside of the Kanto Seiki chiller. Removing the original chiller meant there would be nowhere to mount the way-lube unit bracket.

This made it tricky, but still seemed possible so we went forward.

The customer had a large bracket fabricated that was used as a mounting surface (like a shelf) for the Wexten chiller as well as a place to bolt the way-lube bracket to. It really worked out quite well.

Wexten Chiller on MH500 (1)

Wexten Chiller on MH500 (2)

When the chiller was physically mounted to the machine and the hoses connected, it was time to look at the wiring.

It should be noted that the page in the Mori Seiki schematic showing the chiller connections, although really similar, was not quite what I saw in real life inside the Kanto Seiki chiller. It took some checking in the machine electrical cabinet to see what was what.

In the upper LH side of the electrical enclosure of the Kanto Seiki was a power terminal strip with these wires:


Just below the power terminal strip was a signal terminal strip.

This is a picture of the signal wire terminal strip inside the MPSB-07 chiller:

MPSB-07 Wiring Terminal Strip
From the schematic and tracing the wires, I was able to determine the following:

901 and 902 on the Kanto Seiki chiller were for remote start function. This was controlled by a contact on the Mori Seiki AP-SFT board, so that when the machine was not in a ready state, the chiller was turned off.
The equivalent wires on the Wexten side were 224 and 225.  The factory provided jumper between 224 and 225 was removed.

24NC and 903 on the kanto Seiki chiller were the 24VDC common and the alarm input OCAL (X12.6).
The equivalent wires on the Wexten side were 93 and 95 (normally closed contact for alarm relay on the Wexten).

A1 and A2 on the Kanto Seiki were connected to a thermal sensor mounted to the base casting of the Mori Seiki. These were disconnected.
The existing ambient air temperature sensor for the Wexten was disconnected from the PT-16 circuit board (CN14, labeled "ROOM") and the connector from the Wexten machine bed temperature sensor (provided with the Wexten chiller) was connected in its place. A new hole was drilled and tapped in the machine bed and the Wexten temp sensor was installed.

Although the Mori Seiki schematic showed wires R12 and S12 (100VAC), they were not actually there in the Kanto Seiki chiller. I would think this 100VAC power would have been for contactor coils within the chiller (to run the pump or compressor for example) but this particular MPSB-07 chiller had contactors with 200VAC coils. Apparently the R12-S12 was not needed in this case.

This is a picture of the signal wire terminal strip inside the Wexten chiller with the original wires connected to their new locations:

Wexten COID-12PTS Wiring Terminal Strip

We did experince a breaker trip in the Mori Seiki machine. QM80 (4-10A) was tripping occasionally when the new chiller was operating.

QM80 Breaker

With a meter on the wires, it was possible to see that the current draw was intermittently spiking up to approximately 11A when the chiller was operating.

The tag on the Wexten chiller clearly stated that max current rating was 16A. The wiring was adequate for this current draw, so just the circuit breaker was replaced. No other unusual issues occurred during testing and the machine was put back into production.

If you are having problems with an oil chiller for your machine, please contact us to see if a Wexten replacement makes sense for your situation.

For other Wexten replacement success stories, click here.

We stock a good selection of Wexten chillers and replacement parts available for immediate shipment.

Please contact us is we can answer any questions.

Industrial Oil Cooler Home

Thursday, March 19, 2015

Wexten CO-18PTS Oil Chiller Replaces Matsushita Electric NU-YC100BMJ Chiller on Mori Seiki SH-400

We recently took a call from a customer who was looking to replace a Matsushita (National) oil chiller on their Mori Seiki SH-400. The model number of the Matsushita chiller was NU-YC100BMJ. Hre's a shot of the label:

The customer sent some pages from his Mori Seiki maintenance manual that included specs for the oil chiller:

Power: 200V 3-Phase, 60Hz

Cooling Capacity: 3500 Kcal/H

Pump: 25.2 L/ min

As a replacement, we recommended a Wexten CO-18PTS chiller (our product ID 200459):

Power: 220V, 3-Phase, 50/60Hz

Cooling Capacity: 4500 Kcal/H

Pump: 30.0 L/ min



The customer did their own installation on this one. It's been about 3 weeks since we shipped the chiller. I contacted the customer to make sure everything went ok with the installation. He said all is well and the chiller is working out great.

Check out the Wexten chillers. You may be our next Success Story.

Down Machine? Get the Fanuc Troubleshooting manual here.

Wednesday, March 18, 2015

Wexten CO-12PTS Oil Chiller Replaces Habor HBO-750PSB Oil Chiller on Makino S33L

Makino S33L VMC

This chiller replacement was done at a customer's facility in our area. They had issues with their Habor HBO-750PSB oil chiller and based on cooling capacity, ordered a Wexten CO-12PTS as a replacement, even though I could see from the model number that the Habor unit did not have a tank. Tank model would have been HBO-750PTSB.

A few days later we received a call from the customer asking some questions about the wiring of the Wexten vs. the Habor. We worked over the phone for a short while and then I offered to come out and have a look at the situation with the install of the chiller the next day. They agreed to the visit.

When I arrived the next morning I saw the reason that the Wexten chiller with the tank was chosen as the replacement. The original Habor chiller (without a tank) had been mounted on top of a separate tank, presumably made by Makino. There had been a flow switch used in this separate tank that was removed and now sitting on a bench.

Aside from the 3-phase power and the ground wire, there were (4) remaining wires to be dealt with:

OM-11 24VDC Common for the general chiller alarm OMAL)
OM-12 (Wire for chiller alarm OMAL input X4.5)

OM-18 (24VDC Common for the chiller flow detection alarm OMAL2
OM-19 (Wire for chiller flow alarm OMAL2 input X4.4)

I saw that upon my arrival, the customer had wired the chiller the way I had recommended on the phone (OM-11 to 93 and OM-12 to 95, OM-18 and OM-19 joined together). The machine was not in alarm. 

I tried turning off the chiller while the machine was idle. No alarm. 

I tried running the spindle and turning off the chiller. No alarm. 

I looked in the alarm history and saw that on the previous day, there were several occurrences of this alarm: : : 13055 "FLOW QUANTITY OF SPINDLE COOLING UNIT IS ABNORMAL. DI LS170 WENT OFF." We tried (like for a while) to duplicate this alarm but it would NOT happen under any circumstance we created.

There was no ladder book available at the customer's place and the PMC ladder keys were not active on the control. No using the ladder to figure anything out.

After some questions and different answers about how the alarm was generated the prior day, I was told that the OM18 and OM-19 wires were possibly NOT joined when the alarm happened. I shut of the machine and separated the OM-18 and OM-19 and turned the power on. An alarm 13055 happened about 10 seconds after MACHINE READY. So separation of OM-18 and OM-19 were needed to generate the alarm. Although the alarm was the 13055 low flow alarm, not a general chiller alarm. This was not what I wanted ideally. And one other issue: the alarm would only happen if the chiller power was on and it was running normally. If you turned the chiller off, the alarm could be reset and the spindle turned on. It was doing the opposite of what I wanted it to do.

Again, the customer had wired OM-11 to wire 93 and OM-12 to the wire 95 on the Wexten terminal strip. This is the NO contact on the Wexten alarm relay K3. I needed the NC contact, on wires 93 and 94, but there was no wire 94 or terminal 94. I looked in the wire track (as recommended in the Wexten manual and found wire 94 in there, unused. I removed 95 from the strip, taped it off, and put wire 94 in it's place. The result was what I was looking for; the machine would NOT be in alarm when the chiller was operating normally and would generate the 13055 alarm on the Makino side if the chiller had an error or was shut off.

I really wanted to have the other chiller alarm generated, since technically we we not using the separate tank with the flow switch any longer but my experimenting was taking much longer than I intended and I wanted to give the machine back to the customer sooner than later. The ladder diagram and on-screen ladder would have been helpful as well, but no such luck. 

I installed the Wexten bed temperature sensor into the casting and plugged it into the Wexten control PCB, in place of the air temperature sensor connector. I checked/ recorded the Wexten parameters and started testing the operation. I ran the spindle and watched the compressor turn on and off based on the oil temperature.

Ultimately, the chiller ran when it was supposed to and alarmed the machine out when it was supposed to. Another Habor HBO-750 replacement was installed and operating.

Check out the Wexten chillers. You may be our next Success Story.

Down Machine? Get the Fanuc Troubleshooting manual here.

Thursday, November 6, 2014

Wexten CO-36PTS Oil Chiller Has Arrived!

New Arriaval!! Wexten CO-36PTS Oil Chiller

Large 36,000 BTH/Hr (9,000 KCAL/ Hr) coil chiller unit for industrial machinery.

No picture yet, but we're working on it.

Check out the Wexten chillers. You may be our next Success Story.

Down Machine? Get the Fanuc Troubleshooting manual here.

Wednesday, June 12, 2013

Wexten COID-12PTS Oil Chiller Replaces Matsushita Electric NU-YC60BM Chiller on Mori Seiki SL-250B

Another case where we were able to replace the original, builder supplied oil chiller with a Wexten alternative.

Wexten COID-12PTS Chiller Installed on Mori Seiki SL-250B

Due to heavy April 2013 rains in Central Illinois, a levy on the Illinois River gave way and flooded parts of Bartonville, Illinois. We have a customer located here who saw several feet of water pour into his shop when this happened. As you would expect, a lot of damage was done by this flood. One casualty was the spindle oil chiller on the customer's Mori Seiki SL-250B.

The SL-250B has a spindle oil chiller located on the spindle side, very close to the floor. The chiller was submerged by the flood water. The customer contacted me asking if I could find him a replacement chiller. The model number I was given was NU-YC60BM. The chiller was made by Matsushita Electric Industrial Company. Here's a picture of the label:

Matsushita NU-YC60BM Oil Chiller Label
I started looking for this oil chiller but had no luck finding any information at all. Given enough time and money, I was sure Mori Seiki could provide it, but the customer needed to get his damaged machines running ASAP. He asked if we had something in stock that would work as a replacement. Based on the information we were able to get from the Matsushita unit, we decided to try a Wexten COID-12PTS chiller as a replacement.

The original chiller was installed in an opening within the sheet-metal of the machine. We knew that it wasn't possible to install the Wexten chiller in the same area within the machine, due to size differences between the chillers. As we have done in the past, we located the chiller next to the machine, on the spindle side.

Wexten COID-12PTS Chiller Installed on Mori Seiki SL-250B

The hoses and wiring were extended to accommodate the new location. The wiring and piping were simple and straight-forward, and the installation was done in less than a day. After adding a filter (per the Wexten manual), filling the unit with oil, and setting the parameters, we turned it on and tested the function. It worked perfectly.

Hoses Extended to reach the new Chiller Location

Oil Filter Installed

I stopped in on this customer yesterday to see if they had any issues at all with the Wexten chiller since the installation. There were none.

We have Wexten chillers available in a variety of cooling capacities. We also have inverter-type units, capable of temperature control within plus/minus 0.1 degree C.

This is another great example of the flexibility of the Wexten chillers. They are high-quality units and, in most cases, installation is simple. Of course, the Wexten chiller is not always going to work as a replacement for the OEM provided chiller. There may be special features of the original unit that cannot be replicated or differences in the physical dimensions may be something that cannot be overcome. But if you are willing to make some minor accommodations for the Wexten, you can probably make it work for your particular situation...and save a bunch of money and time along the way. You may be our next Wexten success story.

Check out the Wexten chillers. You may be our next Success Story.

Down Machine? Get the Fanuc Troubleshooting manual here.

Friday, June 8, 2012


YCM TV138B VMC with Habor Chiller

Recently we had an inquiry for a Habor HBO-750 oil chiller from a customer in Ohio. This shop has several YCM vertical mills in their facility equipped with habor oil chillers. The issue they were having was with a Habor HBO-750P2TSBM2 chiller, installed on their YCM TV158B machine.

The customer consulted with a local HVAC company and the problem was quickly narrowed down to the compressor inside the chiller. It was not running. After searching for information on the internet, the customer contacted a chiller supply company for assistance.

After 2 recommended replacement compressors were ordered and both ultimately failed in short order, and a 2-3 week delivery quoted for a new chiller from YCM, the customer contacted us.

Based on the cooling capacity of the HBO-750 (3000kcAL/hr), we recommended replacing the entire unit with a new Wexten CO-12PTS chiller. There was going to be an issue with the replacement since the Habor chiller was equipped with a dual pump that both pumped oil from the the chiller to the machine head-stock as well as pumping oil from the machine head-stock back to the chiller. The Wexten was not equipped with such a pump and modifications were definitely going to be required to make it work.

The machine had already been down for several days and replacing the compressors had gotten them nowhere. After several phone conversations the customer decided to go ahead with ordering the Wexten chiller. We shipped a new CO-12PTS Wexten chiller to the customer.

To deal with the pump compatibility issue (dual pump vs. single-pump), the customer had their HVAC contractor remove the functioning dual-pump from the Habor and  install it in the Wexten chiller. This presented several problems:
  • The cooling fan is mounted to the end of the pump shaft of the Habor unit, as was the case with the Wexten pump. Unfortunately, the fan on the Habor pump was larger.
  • When the Habor pump was installed, the pump shaft center-line was lower than the center-line of the shaft of the Wexten pump.
However, after some modifications to the shroud around the fan and raising the dual-pump (adding a riser) to be at the same shaft center-line where the original Wexten pump had been, it became clear that this modification was indeed going to be work. There were also some fittings that were changed to accomodate the Wexten, but all-in-all, according to the customer, the modifications were reasonably simple.

I checked with the customer several times after the Wexten chiller was put into service to see how things were going. Each time, the report back was that everything was working great.

Earlier this week I made a trip to Ohio to discuss the installation with the customer and see the unit. I asked a few question about the whole experience:

Q: "Have you had any issues with the Wexten chiller since the installation was done?"
A: "No. We have had no issues."

Q: "What machine did you install the Wexten chiller on?"
A: A YCM TV158B.

Q: "What modifications were required?"
A: "We had to use the dual-pump from the Habor chiller and put a riser under it to match the original Wexten pump center-line."

Q: "Did you have to purchase additional parts?"
A: "We did have to get some fittings. Not really too much else."

Q: "How satisfied are you with the purchase of the Wexten on a scale from 1 to 10?"
A: "10."

Q: "Would you consider purchasing another Wexten chiller if the the need arises?"
A: "Yes."

Q: "Would you recommend the Wexten brand to other people in the industry?"
A: "Yes. The Wexten unit actually looks like a "better" unit than the habor chiller. My HVAC guy said the same thing."

Q: "How would you rate the entire experience of working with us on the replacement of the Habor chiller with the Wexten chiller on a scale of 1 to 10?"
A: "10."

If you find yourself in need a replacement oil chiller, we hope that you'll take a look at the Wexten oil chiller models avalaible now at Global Machine Parts. If you have questions, please contact us for assistance or give us a call toll-free at 888-498-0135.

Wexten chillers are solidly built units at reasonable prices and many models are in stock and ready to ship. You might find that for about the same price as others may want for a compressor or a pump, you could get an brand new Wexten chiller that will provide years fo trouble-free operation.

Check out the Wexten chillers. You may be our next Success Story.

YCM Bandsaw Information Available at





Tuesday, May 15, 2012

In Stock Large Model and Inverter-Type Wexten Chillers- Prices Slashed!

We have just reduced the prices on in-stock, popular large and inverter-type models of our in-stock Wexten chillers.

These were already a great deal at the old prices, but if you need to replace a chiller, you're definitely going to want to take a look at our high quality Wexten chillers.

This is what we've got:

5.2KW/4500KCAL AT 60 Hz.
DIM. (HXWXD)W/TANK 1265x545x675MM



3.5KW/3000 KCAL AT 60 Hz.
DIM. (HXWXD)W/TANK 1230x440x360MM, WT. W/TANK 117KG


7.0KW/6000 KCAL AT 60 Hz
DIM. (HXWXD)W/TANK 1440x560x470MM



Check out the Wexten chillers. You may be our next Success Story.