PRODUCTS FOR THE
HVAC&R INDUSTRY
THERMAL ELECTRIC ELEMENTS VERSION 1.0
AUSTRALIA THE SPECIALISTS IN CUSTOM HEATING
AIR HEATER BANKS Complete air heater banks incorporating the choice of elements are designed and built to meet the requirements of individual air conditioning installations. Once we have been provided with full details for the job, the most economic arrangement of elements, banks, etc will be selected to comply with requirements. Terminal boxes are custom made to suit your duct size. Heaters are wired in number of steps required to a terminal block inside, enabling your electrician to connect up power supply easily.
Job data required for heater banks 1. Nominate the element to be fitted or the standard specified, eg. AS1668 Part 1 or AS3102 - Insulation 2. Size of the duct and entry side of heater bank 3. Insulation 4. Total kilowatts required 5. Number of control steps needed and whether wiring is single or three phase 6. Details of controls required to be fitted to banks 7. Duct section required and connection type
TERMINAL BOXES Standard Boxes 0.9mm galvanised or zincanneal material Removable cover 75mm deep Under normal circumstances we select appropriate boxes, elements, etc to give the most economic combination and the best airspace coverage inside the duct. Weather resistant boxes are also available for use in external applications.
HEATED DUCT UNITS Thermal can offer you a complete solution to your duct heating installation. We can supply the whole duct section saving you hundreds of dollars in on-site costs! They come complete with: Internal insulation Electric duct heater inserts (including terminal box and safety’s) Spiggots, TDF Flanges or Slide joints Stage switching and contactors Pre wired if required Normally each part of the duct heater would have to be organised through different suppliers. A company for the elements, a company for the duct section and someone to wire it on-site. By ordering the completely pre-assembled unit from Thermal you’ll save time and money knowing the unit is connected and working, all you have to do is insert it into your existing duct work!
edh handing side To improve the efficiency of TEE Electric Duct Heaters, Thermal designs all units with a specified handing side based on the customers requirements and site limitations. By selecting a handing side relevant to the particular duct installation, on-site servicing is made much easier by facing the unit in a more easily accessible direction. Determining the best handing side for an electric duct heater also optimises the performance of the unit by allowing for much more thorough over-temperature monitoring based on the position of the unit within the duct. The handing side is based on the ductwork that the unit is being installed into when looking down the duct with the airflow coming towards you. The handing is then specified as either Left hand side or Right hand side.
This image shows Left hand side
application In air conditioned buildings Comfort during winter months is usually provided by ducted heated air throughout a building from a central air conditioning plant room. This plant is either a reverse cycle unit (cooling and heating) or a cooling unit only, with electric heaters mounted along the duct or inside the air conditioning unit. Such heaters are used to: Provide back up (booster) heating for reverse cycle units Reheat air to comfort level after chilling below dewpoint for dehumidification in summer Location of the heater banks can be obtained by referring to the duct design layout, supplied by the installer, which should be kept either by the building maintenance staff or in some cases in the air conditioning plant room. Comfort Heating Below is a guide for kilowatts required for room heating based on a 20°C difference between inside and outside temperatures (interpolate for lower differentials).
Plot A - Room with low external exposure, window and door area <15% Plot B - Insulated room, 2 or 3 external walls, window and door area <30% Plot C - Uninsulated room, fully exposed but lined inside Plot D - Temporary structure, fully exposed, uninsulated, unlined
controls & accessories In accordance with AS/NZS 1668 Part 1, temperature controllers and air pressure switches are required to eliminate overheating and possible premature failure of duct heaters.
over temp safety devices An over temperature controller is a thermally operated switch, designed to provide protection when its capillary tube is heated above a preset cut out temperature. This could be caused by an accidental cutting of the air flow. Over temperature controllers come in both manual and automatic reset. The units are fail safe - if the capillary is ruptured, the contacts open automatically. A. Adjustable manual reset over-temp Rating: 20A Cut out temp range: 60°C to 150°C B. Manual reset over-temp Rating: 16A Cut out temp range: 120°C
C. Air Pressure Switch Current Rating: 15A - resistive at 125VAC Operating Pressure: .05” + .02” - .02” to 12.0” WC Temp range: -40°C to +82°C
C.
D. PENN Type Over Temp Single Pole Double Throw (for alarm circuit) Opens on rise, Manual reset Temp range: -4°C to +101°C D. PENN Type Over Temp
controls E.
E. Solid State Relay Single and 3 phase 0-125A Voltages/Types:
4~32VDC 80~280VAC 4~20mA or 0~10VDC (Variable output) VR 0~500kΩ (Potentiometer Control)
F. Thyristor Power Control Single and 3 phase 0-720A Phase Angle or Zero Crossing Control Input Signals:
0~5VDC; 1~5VDC; 2~10VDC; 0~10VDC; 4~20mA; 0~10mA; Manual Adjustment
Other controls are available on request
F.
air heating elements Thermal Electric offers finned air heating elements that comply with AS1668 Part 1. Available in straight, U, W, and Triple U forms and rated to 240V our finned air heaters are available from 500W to 6000W. All of our standard finned air heaters are of stainless steel construction with M5 terminals, screws and saddle washers provided for an easy electrical connection. Mounting bushes are fixed to each end of U, W and Triple U form elements and securing nuts and washers are provided. Thermal Electric can also manufacture special sizes, shapes and power ratings to suit your needs, or to replace existing air heating elements you may have. See below for measurements of our standard ranges and technical specifications.
STRAIGHT, U AND W FORM ELEMENTS
ats type
finned heaters
Sheath Watt Density: 101kW/m² (65W/in²) - Fin and sheath total 18.2kW/m² (11.8W/in²) Operating Temperatures: Maximum permissible temperature of element when operating is 400°C. Minimum air velocity of 3 metres/sec through face area of duct is recommended if operated in accordance with AS/NZS 1668 Part 1. Construction: Continuous spiral stainless steel fin fitted to 8mm diameter stainless steel sheathed tubular element. Diameter of fin is 27mm. Finning pitch is 5.1mm. Finish: Stainless steel Mounting: Bushes M16 thread at 13mm long. Clearance hole of 18mm required. Nuts and washers included.
All dimensions are given in mm and elements are rated at 240V. Special sizes, voltages and wattages manufactured to suit your needs.
finned heaters
ams type
Sheath Watt Density: 124kW/m² (80W/in²) - Fin and sheath total 11kW/m² (7W/in²) Operating Temperatures: Maximum permissible temperature of element when operating is 400°C. Minimum air velocity of 3 metres/sec through face area of duct is recommended if operated in accordance with AS/NZS 1668 Part 1. Construction: Continuous spiral stainless steel fin fitted to 8mm diameter stainless steel sheathed tubular element. Diameter of fin is 27mm. Finning pitch is 6.4mm. Finish: Stainless steel Mounting: Bushes M16 thread at 13mm long. Clearance hole of 18mm required. Nuts and washers included.
All dimensions are given in mm and elements are rated at 240V. Special sizes, voltages and wattages manufactured to suit your needs.
aps type
finned heaters
Sheath Watt Density: 43.5kW/m² (28W/in²) Fin and sheath total 2.8kW/m² (1.8W/in²) Operating Temperatures: Element surface temperature will not exceed 400°C in still air at 20°C if operated in accordance with AS/NZS 1668 Part 1. Construction: Continuous spiral stainless steel fin fitted to 10.7mm diameter stainless steel sheathed tubular element. Diameter of fin is 30mm. Finning pitch is 5.1mm. Finish: Stainless steel Mounting: Bushes M16 thread at 13mm long. Clearance hole of 18mm required. Nuts and washers included.
finned heaters
avs type
Sheath Watt Density: 31kW/m² (20W/in²) - Fin and sheath total 4.8kW/m² (3.1W/in²) Operating Temperatures: Element surface temperature will not exceed 400°C in still air at 20°C if operated in accordance with AS/NZS 1668 Part 1. Construction: Continuous spiral stainless steel fin fitted to 8mm diameter stainless steel sheathed tubular element. Diameter of fin is 27mm. Finning pitch is 6.4mm. Finish: Stainless steel Mounting: Bushes M16 thread at 13mm long. Clearance hole of 18mm required. Nuts and washers included.
All dimensions are given in mm and elements are rated at 240V. Special sizes, voltages and wattages manufactured to suit your needs.
ass type
finned heaters
Sheath Watt Density: 60kW/m² (39W/in²) - Fin and sheath total 4.3kW/m² (2.8W/in²) Operating Temperatures: Maximum permissible temperature of element when operating is 400°C. Minimum air velocity of 1metre/sec through face area of duct is recommended if operated in accordance with AS/NZS 1668 Part 1. Construction: Continuous spiral stainless steel fin fitted to 10.7mm diameter stainless steel sheathed tubular element. Diameter of fin is 30mm. Finning pitch is 5.1mm. Finish: Stainless steel Mounting: Bushes M16 thread at 13mm long. Clearance hole of 18mm required. Nuts and washers included.
Suffering with unwanted condensate from your air conditioning unit? Evapodry can solve this problem by evaporating the condensate from the collection tray under the split system’s compressor easily and efficiently with no need for plumbing systems. A new and improved control unit ensures a more reliable evaporation process. The probe senses condensate or rainwater that has accumulated in the tray and energises the heating element. when the probe senses that the liquid has evaporated, the heating element is turned off. The electric heating element, together with its condensate sensing probe, fits inside the collection tray as an integrated unit. All electrical terminations are inside an IP55 rated enclosure. The condensate collection tray is stainless steel, measuring 400 x 400 x 75mm deep, with the heating element and control box fitted to the front.
Custom sizes available!
SPECIFICATIONS Heating element is rated at 240V 1000W Enclosure is IP55 rated with weatherproof flexible conduit entry and termination is by a 1 metre lead with 3 pin 10A plugtop Evaporation rate is 1L per hour and this may vary dependent upon atmospheric conditions (like humidity levels) Condensate tray is stainless steel 400 x 400 x 70mm deep Element safety cover fabricated from perforated stainless steel
The probe senses condensate or rainwater and turns on the heating element.
The Evapodry has been tested by TUV Rheinland and meets Australian Standards AS/NZS 60335.2.15:2013 and 60335.1:2011 including amendment 1
REFRIGERATION Thermal Electric have been supplying defrost, drain pan and coil heaters for refrigeration cabinets for over 40 years and have the most extensive database of parts information in the industry today. TEE supplies heaters for all cabinets including Frigrite, Muller, Kirby, Repco, Austral, Buffalo Trident, Kysor, Hussmann, Coldwright, Koxka and many more. Stainless steel sheathed elements are designed to be capable of reaching temperatures of 1150°C, however refrigeration applications do not require such high temperatures, thus giving a long lasting product. A wide variety of terminations, lead lengths and lead types are available. Leads are capable of operating in temperatures of -40°C to +150°C. Custom designed heating elements can be produced for obsolete freezer cabinets, coil and drain pans.
DEFROST HEATERS Thermal’s defrost heaters are constructed of stainless steel sheathed elements with brass or stainless steel fins for quick heat dissipation and are made fully water resistant by vulcanising double insulated cable to the end of the element.
Part # Dim A 990 1D 1350 2D 1550 3D 1650 4D 1950 5D 1778 6D 2250 7D 2590 8D 3200 9D 10D 2100 11D 2808 12D 3380 13D 3750
Dim B 1600 1500 1500 1500 2500 1500 1500 2500 2500 1500 1500 1500 2000
Watts 1500 1500 1500 1500 2000 2000 2000 2000 2500 2000 2000 2000 3000
Part # 80D 81D 82D 83D 84D 85D 86D 88D 89D 166861S 166862S 166863S 166864S
Dim A Dim B Watts 2100 2500 1800 2812 2500 2000 3380 2500 2500 2108 6000 1800 2769 6000 2000 3380 6000 2500 400 1150 1500 500 1778 1500 1430 1500 1500 3200 2500 3400 2620 2500 2750 2200 2500 2250 1600 2500 1650
Dim A Dim B Watts Part # 4980000 1000 2000 1000 4980001 1320 2400 1200 4980021 1960 3200 1600 4980022 2540 3500 2000 4980023 3180 6000 2400 All dimensions are given in millimetres and elements are rated at 240V. Special sizes, voltages and wattages manufactured to suit your requirements.
REFRIGERATION DRAIN & CONDENSATE PAN HEATERS Drain and condensate pan heaters are used for the prevention of ice build up in drain ways and condensate pans of commercial refrigeration units. Thermal’s drain and pan heaters are constructed of stainless steel sheathed, low watt density elements to guarantee a longer life span and higher resistance to corrosion. Below are some of our standard range of drain pan heaters, however we can manufacture any size or shape of refrigeration heater you might require and have the largest database of cabinet manufacturer parts in the country.
end drain Part # Dim A 51W 1000 52W 1270 53W 1600 54W 1980 55W 1830 56W 2260
Dim B Dim C Dim D Watts 150 60 2500 165 200 60 4500 180 200 60 3125 165 200 4500 180 200 60 3330 180 200 60 3800 180
Part # 57W 58W 59W 60W 61W 62W
Dim A Dim B Dim C Dim D Watts 200 60 180 2490 5400 500 60 180 2946 4600 200 2300 3800 200 60 180 2850 4350 200 3450 4950 300 3760 5260
centre drain Part # Dim A 64W 2286 65W 3555 67W 1829
Dim B 4500 5200 4600
Dim C Dim D 60 1500 70 1500 60 4600
Watts 500 500 200
All dimensions are given in millimetres and elements are rated at 240V. Special sizes, voltages and wattages manufactured to suit your requirements.
REFRIGERATION flexible drain heaters Thermal’s Silicone Flexible heater is used extensively within the commercial refrigeration industry to prevent ice build up within condensate trays and drains. A flexible heater that is resistant to water, oils, chemicals and many harsh environments ensures a safe, reliable and economical solution. Designed for freeze protection and process temperature maintenance along pipelines, flanges, valves and pumps; or used wherever our reliable tubular calrod type heating elements cannot be used due to uneven surfaces or obstacles prohibiting easy installation. Other applications include anti-condensation heaters for large electric motors, control enclosures, switchboards and sump heaters for diesel engines. Construction of the Thermal Silicone Flexible heater consists of a Nickel Chromium (NiChrome) resistance wire heli-coiled around an electrical grade high temperature fibreglass cord, insulated by a silicone rubber sheath. A second fibreglass sheath is added for further electrical and mechanical protection of the resistance wire. The double insulated heating cable is enclosed within the third and final high temperature silicone fibreglass sheath, terminated with silicone cold tails and further sealed with a silicone rubber sealant.
SPECIFICATIONS Maximum operating temperature of 220°C. Lengths ranging from 500mm to 15 metres and various watts per metre and voltages are available on request.
SF75-1 SF75-2 SF75-3 SF75-4 SF75-5 SF75-6 SF75-7 SF75-8 SF75-9 SF75-10 SF75-11 SF75-12 SF75-13 SF75-14 SF75-15
Length Wattage
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
150 Watts/Metre
100 Watts/Metre
75 Watts/Metre Part #
75 150 225 300 375 450 525 600 675 750 825 900 975 1050 1125
Part #
SF100-05 SF100-1 SF100-2 SF100-3 SF100-4 SF100-5 SF100-6 SF100-7 SF100-8 SF100-9 SF100-10 SF100-11 SF100-12 SF100-13 SF100-14 SF100-15
Length Wattage
0.5 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
50 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500
Part #
SF150-05 SF150-1 SF150-2 SF150-3 SF150-4 SF150-5 SF150-6 SF150-7 SF150-8 SF150-9 SF150-10 SF150-11 SF150-12 SF150-13 SF150-14 SF150-15
All length dimensions in metres
Length Wattage
0.5 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
75 150 300 450 600 750 900 1050 1200 1350 1500 1650 1800 1950 2100 2250
thermal electric elements TH E SPEC IAL ISTS IN CUSTO M HEATING
AUSTRALIA THE SPECIALISTS IN CUSTOM HEATING
HEAD OFFICE 7 Buckman Cl, TOORMINA NSW 2452 +61 2 6659 6200
+61 2 6653 3839
[email protected]
PERTH
SYDNEY 73/45 Powers Rd, SEVEN HILLS NSW 2147 +61 2 8814 2500 +61 2 9620 9121
[email protected]
9/17 Prowse St, WEST PERTH WA 6005 +61 8 9363 8700 +61 8 9467 1465
[email protected]
BRISBANE
MALAYSIA
1/8 Hopper Ave, ORMEAU QLD 4208 +61 7 5547 3300 +61 7 5540 7194
[email protected]
MELBOURNE 6/310 Governor Rd, BRAESIDE VIC 3195 +61 3 8587 6600 +61 3 9580 6333
[email protected]
Enhance Track Sdn Bhd +603 8063 2281 +603 8063 2282
[email protected]
PHILIPPINES N-7119 Gil Puyat Ave Clark Freeport Zone Pampanga 2023
www.thermalelectric.com.au abn 59 001 255 492
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