ThermoNeslab Merlin M33 Chiller

The ThermoFlex Wide II device uses an external Merlin M33 chiller unit to send cooling water to the TFX thermal head. It is:

• connected to the output device with two coolant hoses (on the fanbox) photo of bulkhead connectors | photo of connections on rear of chiller
• connected to an AC power source on the output device (on the fanbox)
• fitted with casters so it can be rolled into position
• fitted with a temperature controller that displays coolant temperature (set to 23°C) photo

The Magnus VLF device uses an internal heat exchanger unit to send cooling water to the version 2.0 and 2.5 thermal heads. TH2.7 and some older Magnus VLF devices will have a Merlin M33 chiller unit. It is:

• connected to the output device with a water hose assembly
• fitted with casters so it can be rolled into position
• fitted with a temperature controller that displays coolant temperature

For Magnus VLF with a version 3.x thermal head, see the Merlin M75 chiller unit.

For installation, operation, and other information on the Merlin series of Neslab chillers, see the Neslab website: http://www.thermo.com/eThermo/CDA/Products/Product_Detail/1,1075,1000001155238-107,00.html

Commands/Settings

Settings

ThermoFlex Wide II - M33 on a TFX head

• Coolant temperature set point - 23° C

Magnus VLF - M33 on a TH 2.5

• Deadhead pressure setting - 75 psi
• Coolant temperature set point - 24° C

Magnus VLF - M33 on a TH 2.7

• Deadhead pressure setting - 55 psi
• Coolant temperature set point - 14° C

MSDS

All MSDS information is now available through one portal. Go to http://msds.kpgraphics.com/company/index.asp for the most current MSDS.

Parts

External M33 Chiller Unit

Used on ThermoFlex Wide II only.

• 60 Hz kit: 518-00369A  BOM
  Contains the 60 Hz chiller unit, 602-00076
• 50 Hz: 518-00370A  BOM
  Contains the 50 Hz chiller unit, 602-00075



• External chiller hose: 50-1557A
• Internal hose (chiller to head): 50-2763A
• Internal hose (head to chiller): 50-2762A
• Chiller to device cable: 10-5170A
• Wide II to chiller power cord: 216-00041

Internal M33 Chiller Unit

Used on older Magnus VLFs only. photo

• 60 Hz kit:  518-00223A  BOM
  Contains the 60 Hz chiller unit, 602-00076
• 50 Hz kit:  518-00224A  BOM
  Contains the 50 Hz chiller unit, 602-00075



• 5183 kit, manual device:  518-00596B  BOM
• 6383 kit, manual device:  518-00597B  BOM
• 5183 kit, MCU device:  518-00598B  BOM
• 6383 kit, MCU device:  518-00599B  BOM



• Water hoses and cables kit:  518-00600B  BOM | DWG
  Includes chiller air supply fan, 500-00804A  BOM
• Drip tray, manual device:  252-05046A
• Drip tray, MCU device:  252-05047A
• Chiller filter assembly:  500-01665A DWG
• Flow pressure switch:  172-00066
• Flow pressure switch cable:  220-00411B DWG

photo of hoses  
photo of connections and power outlet
photo of hoses routed along underside of frame

Common M33 Chiller Parts

• Chiller dust filter: 252-04226A photo of filter
• Dowtherm SR1 thermal transfer fluid: 82-1032A
  Warning: Do not use automotive antifreeze, flammable, or corrosive fluids.
• Funnel: 59-3478

Procedures

• Neslab M33/M75 Cooling Temperature and Pressure Settings
• Merlin Recirculating Chillers

Troubleshooting

• See the Troubleshooting section in the Merlin Recirculating Chillers manual.