Laboratory Recirculating Chillers 3500

K1 and K3 Chiller Range

Applied Thermal Control recirculating chillers are built to order to our customers’ requirements, they are designed for use with applications in laboratory, research and manufacturing processes. With over 20 years’ experience supplying chillers from 1600 BTU (480W) through to 51100 BTU (15kW) cooling capacity we offer expert, supportive and consultative pre-sales advice with free technical support from our experienced engineers, research and development team.

Our precision chillers benefit from a compact design with a small foot print, they can be easily moved on casters between applications or experiments and most of the range can effortlessly be stored on or beneath a bench. Offering accurate temperature control to 0.1°C precision with a choice of recirculating chillers, water-to-water heat exchangers and air blast coolers.

Providing great reliability and consistent temperature stability the ATC range of chillers are quiet in operation and available with a range of pumps and standard options to suit your needs. Each chiller is specifically designed and manufactured to suit each customers requirement. We have experience in working with food manufacturers, cosmetics producers, scientific instrument support markets (electron microscopes, X-ray diffraction, ICPMS etc.), semiconductor process, breweries, ophthalmic lens manufacturing equipment, induction heating, and more recently the chillers of choice for commercial digital printing and laser lithography markets worldwide.

With a robust design, supporting research and applications that are “always on” ATC chillers offer great reliability with up to 51100 BTU (15kW) cooling capacity. Available as UL-CSA compliant via ETL Mark option on both indoor and outdoor chillers.

The use of precision recirculating chillers can help to comply with organizational environmental policies. By using accurately cooled house water, processes can be economical and environmentally friendly.

We supply worldwide, our chillers have a variable power supply, allowing for easy change of voltage or frequency supply from one region to another at a flick of a switch. This is backed by an extensive network of trusted partners and skilled local service agents to support our global customers.

We can offer service contract options to support your chiller in use. We have US-based service agents, if you are interested in protecting your chiller with a service contract please contact your local distributor.

K1 Chiller

The K1 chiller is a discreet design, quiet in operation and offers a full 5900 BTU (1.75kW) of cooling, with a range of accessories. Originally designed for use in a laboratory these chillers can be customized for a specific application and are suitable for any indoor environment.

Compact and robust design
K1 chillers are built to specification/order
The K1 has an exceptionally high 5900 BTU (1.75kW) cooling capacity
Simple operation and an ergonomic design
Large bright LED display
Standalone filling level indicator, easy to access and change
Splash proof keypad with integrated mains switch
Reliable microprocessor PID temperature control
Vents are located on all faces for flexible installation
Pressure gauge Internal by pass valve to adjust pump pressure, as standard
Optional RS485 interface for PC connection
Permissible temperature in return line +70⁰C
Alarm output, potential free change over contact (maximum 30 VA)
Plastic molded bath tanks, suitable for DI and nonferrous applications
Low liquid level protection with optical and audible alarm signal

K3 Chiller

A full 10900 BTU (3.2kW) of cooling in a very compact and robust chiller. The chiller has a full range of optional accessories.

K3 chillers are built to specification/order
Compact and robust design
K3 units can be customized to fit specific application
Designed for laboratory, but with a robust steel enclosure so can be deployed in almost any environment
Hexid heat transfer fluid extends the life of recirculating chillers, prevents frost and protects against growth of damaging bacteria and algae
Simple operation and an ergonomic design
Large bright LED display
Standalone filling level indicator, easy to access and change
Splash proof keypad with integrated mains switch
Reliable microprocessor PID temperature control
Vents are located on all faces for flexible installation
Pressure gauge Internal by pass valve to adjust pump pressure, as standard
Optional RS485 interface for PC connection
Permissible temperature in return line +70⁰C
Alarm output, potential free change over contact (maximum 30 VA)
Plastic molded bath tanks, suitable for DI and nonferrous applications
Low liquid level protection with optical and audible alarm signal

Instruction Manuals

K1 and K3 Chiller Instruction Manual

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Download the full spec sheet here


Cooling capacity (setpoint 20°C, ambient 20°C)	K1/5900 BTU (1750W)	K3/10900 BTU (3200W)
Physical attributes
Physical dimensions (LxWxH) (mm)	545 x 420 x 575	540 x 550 x 713
Weight (kg)	66	82
Noise level (dB(A))	68	68
Toolless access	no	No

Temperature control attributes
Technology	Vapour Compression	Vapour Compression
Temperature range (standard)	+4°C to +35°C	+4°C to +35°C
Control method	PID	PID
Temperature stability (with constant load)	±0.1°C	±0.1°C
Temperature resolution	0.1°C	0.1°C

Water circuit attributes
System volume (L)	2.5	2.5
Pump type	1) 5L/min Rotary vane (PD)	1) 5L/min Rotary vane (PD)
	2) 10L/min Rotary vane (PD)	2) 10L/min Rotary vane (PD)
	3) 17L/min Rotary vane (PD)	3) 17L/min Rotary vane (PD)
Pump capability	1) 6bar@5L/min	1) 6bar@5L/min
	2) 6bar@10L/min	2) 6bar@10L/min
	3) 6bar@17L/min	3) 6bar@17L/min
Pressure control (settable pressure relief valve)	Internal, PRV, 20-150psi	Internal, PRV, 20-150psi
Standard fittings	1/2" Female + 3/4" Male	1/2" Female + 3/4" Male
	3/8" + 1/2" hose barbs	3/8" + 1/2" hose barbs
Standard chemical compatibility	Hexid Fluid, Water, Propylene Glycol	Hexid Fluid, Water, Propylene Glycol

Electrical attributes
Option 1	1Ø, 115V, 60Hz, 11.5A	1Ø, 230V, 50Hz, 13A
Option 2	1Ø, 230V, 50Hz, 7.3A	Switchable (see below)
Option 3	Switchable (see below)
Option 4
Option 5
Switchable configuration 1Ø, 115V/60Hz, 220V/60Hz, 230V/50Hz	Yes
Switchable configuration 1Ø, 208V/60Hz, 220V/60Hz, 230V/50Hz	Yes	Yes

Safety and fault indicator
Over-current restart mode	Manual	Manual
Interlock-restored restart mode	Automatic	Automatic
Empty fluid reservoir alarm	Visual, lamp	Visual, lamp
Low fluid flow alarm	Visual, lamp	Visual, lamp
Temperature out of range alarm	Visual, lamp	Visual, lamp
Compressor HP switch	Standard	Standard
Motor thermal overload	Standard	Standard
Emergency off	Standard, via MCB	Standard, via MCB
Warranty options	2 year parts, 1 year labour	2 year parts, 1 year labour
	Enhanced warranty options	Enhanced warranty options

Options available
Remote alarm/power-off; SA00001	Available	Available
Low temperature pack; SA00002	Available, to -20°C	Available, to -20°C
High temperature pack; SA00003	Available, to +80°C	Available, to +80°C
Water cooled KT; SA00004	N/A	N/A
Water cooled K1; SA00005	Available	N/A
Water cooled K4/K6/K9/K12; SA00006	N/A	N/A
Water cooled K3 SA00007	N/A	N/A
Non-return solenoid pack; SA00008	Available	Available
Low flow alarm (KT); SA00010	Standard	Standard
Onboard RS485 data protocol; SA00011	Available	Available
In-line Deionising cartridge and fittings; SA00013	Available	Available
Castors to replace rubber feet; SA00015	Standard	Standard
CPC quick release connectors; SA00016	Available	Available
Installation kit; SA00017	Available	Available
UL approved version	Available	Available
DI water compatible	Available	Available
High ambient pack	N/A	Available, to +45°C
Outdoor pack	Available, to IP54	Available, to IP54
Shelter pack	Available	Available
Service contract	Available	Available
Filter on outlet/inlet	Available	Available
Flow meter pack SA……..	N/A	N/A
Stainless enclosrue	Available	Available

Please contact us for further details on this chiller range.

Remote Alarm Box

The compact remote alarm supplied by Applied Thermal Control is sited close to the application, allowing personnel to monitor the chiller, without needing to see the chiller. The display indicates normal operation, or shows alarms for temperature and fluid (both flow and level). An audible siren also sounds in an alarm condition. The alarm box can be mounted up to 15 metres away from the chiller, and is fitted with an emergency stop switch that will turn off the chiller should it be necessary.

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Low Temperature Pack

This low temperature option can be fitted to allow a chiller to be operated below +4°C and to be controlled down to -15°C.

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Heater Pack

The normal upper limit of the process temperature is 35°C. It is possible to raise this up to 65°C by means of a heater pack (higher temperatures can be achieved, following discussion with an ATC salesperson). Heater packs are typically installed into chiller systems where it is necessary to maintain a specific temperature range, and the cooling capacity of the chiller alone is not sufficient to achieve the desired range.

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Water-Cooled Condensers

Water-cooled condensers are commonly used in chillers to remove heat from the refrigerant and transfer it into a primary cooling circuit. In a recirculating chiller system, the refrigerant absorbs heat from the process or space, and transfers it to the water-cooled condenser.

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Non Return / Solenoid Valve

The non-return/solenoid option can be fitted to prevent back siphoning of fluid into the chiller during maintenance.

They are recommended when the chiller and application are at different levels (more than 2 metres height difference), or where a long length of flexible tubing is used between the chiller and the application. It is also advisable to add non-return/solenoid valves in situations where pipe-runs will be going up into ceiling ducts.

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Quick Release Connectors

All ATC chillers can be fitted with self-sealing quick release fluid connectors allowing a quick and easy chiller exchange.

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Installation Kit

Reinforced black 1/2" tubing and fittings to connect the chiller to an application.

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Castors – KT

Castors enhance mobility for large process cooling equipment, aiding in repositioning, maintenance, and space optimization. While most units include castors as standard, they're optional for the KT, W, and larger XF series models. Their inclusion reduces risks, eases movement, and improves facility layout flexibility.

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RS 485 Comms

RS485 is a serial communication protocol that is commonly used in industrial applications. It is designed to allow multiple devices to communicate with each other over a single communication line, using differential signalling to improve noise immunity and reliability. RS-485 allows you to connect your cooler, through the controller to your application allowing you to change set point and monitor alarms.

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