Thermo Air Ireland have been supplying electrical heater batteries into the Irish market for over 20 years and during this time the same issues arise during the ordering, installation and commissioning stages. This takes up time on contractors, electricians and commissioning engineers. Thermo Air Ireland have put together a number of details that are vital, when selecting and ordering heater batteries. This will save time for all concerned and make sure the client is getting the correct product for their needs.

Electric HB Selection Criteria

A:        Air volume

m3/sec or m3/hr

B:        Duct dimensions

m2. Circular or rectangular ducting.

The combination of air volume and duct dimensions

dictates air velocity.

V:        Air velocity    

m/sec

Recommended air velocity      =          2.5 – 3.5 m/sec

Minimum air velocity              =          1.5 m/sec

Max air velocity                      =          8.0 m/sec

Special controls required if velocity is below 1.5 m/sec.

D:        Air ∆T ˚C

Air off – Air on temperature  

=  ∆T ˚C = 5˚C to 20˚C  =  15˚C ∆T

E:         kW Load

Air Volume m3/sec     x 1.01 x 1.2 x ∆T ˚C   = kW Load,

Ex: 1.0 m3/sec             x 1.01 x 1.2 x 15˚C     = 18.18 kW

F:         Power supply

Heater batteries come in 3 power supply types

220/1/50 hZ single phase

220/3/50 hZ single phase

400/3/50 hZ three phase

G:        Controls 

A large range of control options are available on request

Details on type of control required is vital when ordering, ranging from no controls for the heater battery to complete BMS packages. All are available and this information is vital when placing an order.

Contact our sales team for further information.

sales@thermoair.com

00353-59-9131646

H:        Environment

Electric heater batteries can be manufactured for

different IP ratings and environmental conditions, ranging from standard IP44 to IP65 and  ATEX for offshore, chemical industry, oil industry and ships.

I:          Instillation

The duct heaters can be installed in either a horizontal or a

vertical duct. The air must flow through the duct heater in the direction of the arrow shown on the duct heater. In a horizontal duct, the junction box may face either upwards or at 90° to either side. Installation with the junction box facing downwards is not allowed. The distance to or from a duct bend, fan, damper etc. must be at least twice the connection diameter.

Duct mounted circular heater batteries –

 

  • Diameter 8 sizes: 100 – 400 mm dia.
  • Voltage 220/1/50 hZ –  400/2/50 hZ – 400 /3/50 hZ
  • Output range 400 W – 12000 W
  • Tightness class C to EN 15727
  • Air flow safety – Built-in electronic flow monitor is included in several of the models.
  • Controls – Built-in regulator or for external control
  • Overheat protection – Units have two built-in overheating protections
 as standard – 1 x Auto and 1 x manual reset.
  • Enclosed stainless steel tubular heating elements @ 3 Watts/cm2

Rectangular Heater batteries –

  • Dimensions Width x Height x available length
  • Application – Duct mounted / AHU mounted
  • IP rating – IP44 std / IP55 and IP65 and Atex on request.
  • Voltage 220/1/50 hZ –  400/2/50 hZ – 400 /3/50 hZ
  • Output range 0.5 kW – 2000 kW
  • Tightness class C to EN 15727
  • Airflow safety – Built-in electronic flow monitor is included in several of the models.
  • Controls – Built-in regulator or for externally supplied control package
.
  • Overheat protection – Units have two built-in overheating protections
 as standard – 1 x Auto and 1 x manual reset.
  • Enclosed stainless steel tubular heating elements @ 3 Watts/cm2

Contact our sales team if you require any information or guidance on electric heater batteries.
Thermo Air Ireland Ltd.,
Strawhall
Carlow
R93 YE30
Ireland
sales@thermoair.com

00353-59-9131646
www.thermoair.com