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 75mm 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
sales@thermalelectric.com.au
PERTH
SYDNEY
73/45 Powers Rd, SEVEN HILLS NSW 2147
+61 2 8814 2500
+61 2 9620 9121
sydney@thermalelectric.com.au
9/17 Prowse St, WEST PERTH WA 6005
+61 8 9363 8700
+61 8 9467 1465
perth@thermalelectric.com.au
BRISBANE
MALAYSIA
1/8 Hopper Ave, ORMEAU QLD 4208
+61 7 5547 3300
+61 7 5540 7194
brisbane@thermalelectric.com.au
MELBOURNE
6/310 Governor Rd, BRAESIDE VIC 3195
+61 3 8587 6600
+61 3 9580 6333
melbourne@thermalelectric.com.au
Enhance Track Sdn Bhd
+603 8063 2281
+603 8063 2282
enquiry@enhancetrack.com
PHILIPPINES
N-7119 Gil Puyat Ave
Clark Freeport Zone
Pampanga 2023
www.thermalelectric.com.au
abn 59 001 255 492
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