Industrial Chillers 15 – 25KW


Industrial Chillers 15 – 25KW

Thermex chillers are designed supply chilled water to heat developing processes. The unit are manufactured in Australia to suit local condition and give our customer the solutions they need

  • Description
  • Technical Data
  • Pump data
  • Options
  • About Thermex Solution


Thermex chillers are designed supply chilled water to heat developing processes. The unit are manufactured in Australia to suit local condition and give our customer the solutions they need

Thy can be installed indoors or outdoors and can be configured to supply chilled water for

  • Potable water applications
  • Process cooling from an internal buffer tank
  • Process cooling to an external buffer tank


The chillers are supplied with – as standard

  • An internal 80L buffer tank to protect the compressor from excessive start, close temperature tolerance, reduces thermal spikes and allows for vented design with no need for hydronics kit
  • Suitable for indoor or outdoor installation
  • Rugged galvanized steel construction
  • Components sourced from the industry’s leading suppliers
  • R134a refrigerant for high ambient temperature operation and the lowest GWP of all contemporary refrigerants
  • Integrated circulation pump
  • Comprehensive 12 months warranty on all parts and labour
  • Highly accurate electronic controller
  • 316SS plate heat exchanger evaporator
  • Comprehensive factory testing before dispatch
  • Evaporator protection on all models

Chiller Application

Industrial process chillers are designed to circulate water to a heat producing process via a water pump. The water brings the heat back to the chiller where the compression cycle cools the water before it is returned to the heat process.

Technical Data

Technical Data

Model TC15 TC18 TC20 TC25 TC27
System type Chiller Heat rejection Air


kW 15.1 17.0 19.8 22.5 24.6
Capacity control % 0-100%
Refrigerant Type R134a
Total power input kW 6.25 6.85 7.75 9.37 9.37
Total running current Amps 17.5 18.7 19.3 17.8 19.9
Power requirements V/Hz/Ph 380-415/50/3
COMPRESSOR Scroll Hermetic Start method DOL
Motor size HP 8.0 9.0 10.0 12.0 13.0
RPM 1/min 2900
Maximum Power input kW 4.7 5.3 6.2 7.6 7.6
Total running current Amps/ph. 10.4 11.6 12.2 13.6 15.7
MCC/ comp Amps 17.0 22.0 28.0 24.5 35.0
Rated load current / comp Amps 10.9 14.1 17.9 22.4
Locked rotor amps Amps 101 111 118 125 140
Oil charge / comp L 0.7 0.7 1.0 1.2 1.5
Oil type POE
CONDENSER Air cooled – heavy duty – high ambient design
Material Aluminum, blue fin on copper tube
Tube diameter Inch 7mm
Fin spacing mm 7mm
CONDENSER FANS External, axial fans, 4 pole – speed controlled
Fan speed Rpm 900
Fan diameter mm 450
No fans 2
Total power input kW 0.7 0.92/ phase
Total running current Amps 3.1 2.3/ phase
Total air flow M3/ hr 7800
EVAPORATOR Plate heat exchanger
No. refrigeration circuits 1
Chilled water flow rate l/s 0.8 0.9 1.0 1.1 1.2
Pressure drop kPa 50
Inlet / outlet CHW Temperature C 12/07
Working temp range C 05/20
Water connections mm 1” FBSP
Evaporator protection Flow switch
Expansion TX valve
CONTROLLER Standard electronic – Dixell
HP Safety 2850kPa LP Safety 375kPA
Shipping weight – dry Kg 215 225 232 245 260
Buffer Tank Litres 175
BMS protocols Buffer tank construction  Stainless steel


TC15 to TC27 Unit

TC15 to TC27 Closed Loop Unit


TC15 to TC27 Split System


Evaporator unit


Chiller nomenclature

Pump data

Pump data

Pump model Current draw – 1 phase Current draw – 3 Ph Motor rating – kW
P4 4.0 2.3 0.85
RPM 2900
Approvals CE, WRAS, ACS, TR, EAC
Housing Cast iron
Impeller Stainless steel 316


Pump Curves

Process chillers are typically not for potable water applications although the chiller can be designed to supply potable water.

All Thermex chillers up to 50kW are supplied with a buffer tank – the buffer tank is an important feature in all chillers and the bigger the better. The buffer tank in a process chiller has many benefits such as

  • helping protect the compressor from excessive starts
  • preventing thermal spikes impacting on the compressor
  • allows closer temperature tolerance to the process
  • having stored chilled water to allow a managed shut down of a process should there be a problem with the cooling cycle
  • allows for a vented design and prevent the need for a hydronics kit


Close tolerance (CT)   The chiller can be manufactured with either a hot gas bypass valve or a VFD on the compressor for close temperature tolerance. Standard tolerance achievable is ±0.5C depending on load conditions

The valve acts as to unload the refrigeration effect to the evaporator as the chilled water temperature approached set point.

If the compressor is fitted with a VFD this will slow the compressor down as water temperature approaches set point and speed it up as it approached set point plus hysteresis. The software has a PID loop to ensure maximum efficiency and maintain temperature control.

BMS Connectivity The chiller can be connected to the high or low level BMS

Low level connectivity will be dry contact for

– Master run

– Master fault

High level connectivity is Modbus, SNMP and Bacnet over Ethernet without the need for a gate way

Tandem/ N+1  (T) The chiller can be wired if they are to be installed in a N+1 arrangement so the lead chiller manages the duty cycling of the chillers and controls the chillers if a fault should develop in one of the chillers
Potable water supply


The chiller can be manufactured to deliver water for potable water application. A typical installation requires the chiller to be connected to the main water and the pressure from the main is used to supply the process.

The chiller will have a heat exchanger installed which will cool the mains water to the supply temperature in a single pass

If the process does not require water the chillers operation is unaffected

This method of construction also allows the chiller to be used to cool water temperatures above 20C

Remote Condensers




The chiller can be manufactured as a split system. The evaporator can be installed indoors in a plant room for example and the condenser installed outdoors.

Typically, the maximum distance between the 2 halves of the chiller is 20 meters – for longer runs contact Thermex’s engineering staff

High corrosive environments   If the chiller is to be installed in an environment with corrosive elements present the chiller can be manufactured in such a way to extend the life of the unit

These environments can be

– Coastal which high levels of salt spray present

– Mining with Sulphur present

The coils on the units can be coated to extend their life – the coil will lose efficiency if the bond between the copper and the aluminum starts to break down

The units can be constructed with stainless steel cabinets

The electrical enclosures are weather proof but if an enclosure is required with a high IP rating this can be offered

In the case where flammable gas is present an Ex or ATEX rated unit maybe required

Soft starters In installations where the power supply is not robust soft starters can be supplied on the compressors to limit the in-rush current on compressor start up.
Redundant pumps The units can be supplied with 2 pumps that duty cycle to share the wear and tear. The software can also start the pump sitting in redundancy if the duty pump develops a fault
Pump UPS


The electrical box can be supplied with a separate set of terminals to allow an uninterruptable power supply to be wired so the pump will run continuously – this allows the chiller to keep pumping cold water to the process in the event the 3 phase supply develops and issue and allows the process to shut down in a managed way
Castors The chiller can be supplied on wheels for ease of re-location
High Ambient For installations such as mine sites, especially in remote areas where the temperatures are extreme the chiller can be constructed to be able to handle these extreme temperatures
Compressor VSD Variable speed drives – fitted to the compressor to allow turn down in partial load conditions which adds to the operating efficiency of the chiller

All operational cooling capacity, power consumption and current draw data shown above is based on the chiller operating at the limit of its design and is intended to be an indication only.

Each chiller will be individually designed to customer requirements and a detailed product specification will be supplied at time of order including installation instructions and dimensions. The power consumed by the unit and the current it will draw vary depending on how the chiller is constructed. The chillers performance may also vary slightly from the figures above again based on customer requirements.

THERMEX Solutions product range is subject to change without notice


  • THERMEX Solutions warrants all it products for 12 months from the agreed commissioning date – no later than 30 days from invoicing date.
  • The warranty is to the first purchases of the unit
  • The warranty covers all parts and labour to rectify the unit
  • The warranty is subject to THERMEX Solutions terms and conditions which will be provided at the time of order
  • Warranty is subject to Thermex Solutions full terms and conditions


About Thermex Solution

Thermex Solutions is Australia’s largest manufacturer of small capacity specialsied industrial water chillers. The technical team at Thermex have a combined 50 years in the Australian chiller industry – no other company can offer this level of engineering support for our customers critical applications.

Rather than offer imported chillers Thermex has dedicated itself to providing locally specified and manufactured chillers which are supplied with components sourced from the industry’s leading suppliers. With specifying chillers experience counts and no other company has the experience to offer the advice and solutions the market requires.

As the Australian market grows and diversifies, Thermex can offer expert advice on chillers, heat pumps, variable speed high efficiency scroll chillers, air handling and more.

Thermex is back by a nationwide team of service technicians who are trained in the operation and maintenance of Thermex chillers