Every standard unit runs a fully hermetic scroll compressor: a sealed, compact design with two interlocking spirals and very few moving parts. It is the workhorse of modern precision cooling. The i models (e.g. Chilly Max 70i and MCK 140i, 181i and 320i, with more to come) use an inverter compressor: compressor output matches the cooling load.
Instead of round copper tubes and aluminum fins, microchannel coils use flat aluminum tubes with multiple small internal passages, brazed to aluminum fins.
Stacked stainless plates move heat from your coolant to the refrigerant across a very large surface area packed into a small block.
Every unit circulates coolant through a stainless steel tank with a level indicator and insulated piping.
Every unit includes an integrated centrifugal pump and insulated piping, so one compact unit delivers coolant to your loop. Standard pumps run at about 2.5 bar on the Chilly 45 and 3–4 bar on Chilly Max and MCK, on the strong side for units this size. Variable-speed pumps up to 7 bar (100 psi), as well as high- and low-pressure pumps, are available on request for Chilly Max and MCK.
R513A is a non-flammable (A1 safety class) refrigerant blend with a global warming potential (GWP) of approximately 630, offering a lower-GWP alternative to many commonly used refrigerants.
On Chilly Max and MCK units, the condenser fan sits on top and discharges warm air upward.
An integrated digital controller manages temperature, with level and flow protection built in. The display keeps a fault history on both standard and i models, so past alarms can be reviewed at the unit. Chilly Max and MCK units provide a volt-free common fault alarm contact. A Modbus interface for building management systems is optional on all units.
| Feature | Chilly 45 | Chilly Max | MCK Series |
|---|---|---|---|
| Hermetic scroll compressor | ●Standard | ●Standard | ●Standard |
| Microchannel condenser | ●Standard | ●Standard | ●Standard |
| Plate heat exchanger | – | ●Standard | ●Standard |
| Stainless steel tank | ●Standard | ●Standard | ●Standard |
| Inverter compressor (i models) | – | 70i | 140i · 181i · 320i; other models on request |
| Variable-speed pump (up to 7 bar) | – | Option | Option |
| R513A refrigerant | ●Standard | ●Standard | ●Standard |
| Top-discharge airflow | – | ●Standard | ●Standard |
| Modbus interface | Option | Option | Option |
| Fault alarm contact (volt-free) | – | ●Standard | ●Standard |