Mini Direct Drive Range

Direct Drive Air Handling Units with neat & compact design, available in six standard unit sizes.
A compact and economical range of units with directly driven centrifugal fans.
The external rotor motors have sealed for life ball bearings.
Suitable for internal mounting as standard, models suitable for external mounting are available to order.

FAQs Answered:

Performance range up to 2.25m³/s.
Motor Insulation Class B minimum
Standard Thermal Overload Protection (S.T.O.P.)
Anodised Aluminium pentapost frame
Double skinned panels
Compact direct drive units
Internal standard
Optional external unit
1 Year Guarantee

This product range is now obsolete and no longer available from Vent-Axia. The information here is provided for reference only.

Direct Drive Air Handling Units with neat and compact design. Access can be on the left or right hand side (to be specified at time of ordering).

Mini Direct Drive Unit - Duties from 0.05m³/s to 2.25m³/s
A compact and economical range of units with directly driven centrifugal fans. There are six standard unit sizes. All the fans are speed controllable for added flexibility and incorporate Standard Thermal Overload Protection (S.T.O.P.). The standard unit consists of a rigid inlet connector, 100mm EU4 panel filter, l.p.h.w. or electric heater, direct drive centrifugal fan and rigid outlet connector. An optional Bag Filter (EU5) is available or Panel (50mm) and Bag arrangement.

Suitable for internal mounting as standard, models suitable for external mounting with optional roof canopy, inlet weather cowl and plastic coated panels (colour BS10A05) is available to order.

Specification
Direct Drive Fans have forward curved centrifugal impellers factory matched to an external rotor motor and statically and dynamically balanced to ISO 1940 as a complete assembly. The external rotor motors have sealed for life ball bearings. They incorporate Standard Thermal Overload Protection (S.T.O.P.) and are fully speed controllable. Insulation is class B and the enclosure IP44 to DIN 40050 with the electrical design corresponding to DIN IEC 38. Motors are suitable for ambient temperatures of up to 40°C and atmospheres up to 95% R.H.

Flexible Connectors
The Flexible Connectors are manufactured from Revertex JPT 20 with ductmate flanges to DW142.

LPHW Heater Batteries
L.P.H.W. Heater Batteries are constructed from copper tube, mechanically bonded to aluminium fins with the complete assembly housed in a galvanised steel casing. The coil headers and return bends are totally enclosed within the air handling unit casing. Flow and return connections are located on the same side of the unit and have male B.S.P. thread. L.P.H.W. Heater Batteries are pressure tested under water to 250p.s.i.

Electric Heater Batteries
Electric Heater Battery elements are constructed from Nichrome 5 spiral resistance wire surrounded by magnesium oxide powder and sheathed in stainless steel. The elements are carried on a galvanised steel frame. All electric heaters incorporate a thermal cut out device. Electrical connections are via a flush mounted terminal box on the outside of the air handling unit casing.

DIMENSIONS:

Standard Silencer (single skinned)

Unit
Diffuser
Stock Ref Number
Dimensions in mm
Approx
Weight kg

C
D

D1
54BC1
360
660
18

D2
54BC2
420
660
21

D3
54BC3
520
660
32

D4
54BC4
720
660
40

D5
54BC5
720
960
46

D6
54BC6
720
1260
50

Outlet Diffusers for Connection to Silencer: This item is essential when connecting a silencer directly to the discharge side of a fan section. The flanges at either end match the AHU and silencer dimension.
Inlet Damper

Unit
Inlet
Damper
Stock Ref No
Rigid
Connector
Stock Ref No
Flexible
Connector
Stock Ref No
Dimensions in mm
Approx
Weight kg

C
D
X

D1
57CD-66
54MC1
68FC-1
360
660
165
6

D2
57CD-2
54MC2
68FC-2
420
660
165
6.5

D3
57CD-3
54MC3
68FC-3
520
660
165
7

D4
57CD-4
54MC4
68FC-4
720
660
165
9

D5
57CD-5
54MC5
68FC-5
720
960
165
12

D6
57CD-6
54MC6
68FC-6
720
1260
165
25

Dampers are supplied with extended spindles - suitable for motorisation as standard. When using a damper, a rigid connector will also be required.

Unit A B C D E F1 F2 G H I J K L* M* N*
D1A 360 660 1560 280 580 102 168 172 580 430 280 130 200 625 1440
D1B 360 660 1560 280 580 102 232 172 580 430 280 130 200 625 1440
D2B 420 660 1560 340 580 232 204 93 580 430 280 130 250 625 1440
D3C 520 660 1560 440 580 146 287 281 580 430 280 130 300 625 1440
D3D 520 660 1560 440 580 146 287 281 580 430 280 130 300 625 1440
D4D 720 660 1560 640 580 146 287 432 580 430 280 130 500 625 1440
D4E 720 660 1710 640 580 160 365 456 580 430 430 130 500 625 1590
D5E 720 960 1710 640 880 160 365 456 580 430 430 130 500 925 1590
D5G 720 960 1710 640 880 188 365 435 580 430 430 130 500 925 1590
D5H 720 960 1710 640 880 188 365 435 580 430 430 130 500 925 1590
D6G 720 1260 1710 640 1180 188 365 435 580 430 430 130 500 1225 1590
D6H 720 1260 1710 640 1180 188 365 435 580 430 430 130 500 1225 1590
D6J 720 1260 1710 640 1180 188 730 435 580 430 430 130 500 1225 1590
---
No. Description
1 100mm Panel Filter (50mm to be fitted with Bag Filter)
2 305mm Bag Filter
3 LPHW Heater (1,2, or 3 row) or Electric Heater Battery
4 Fan
5 Weather Cowl
6 105mm Base (Aluminium) (EXTERNAL UNIT ONLY)
Image of Single Phase SPM (Auto-Transformer) - 2 amps
Single Phase SPM (Auto-Transformer) - 2 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 3.5 amps
Single Phase SPM (Auto-Transformer) - 3.5 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 6 amps
Single Phase SPM (Auto-Transformer) - 6 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 9 amps
Single Phase SPM (Auto-Transformer) - 9 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Three Phase RDTK (Auto-Transformer) - 7 amps
Three Phase RDTK (Auto-Transformer) - 7 amps
Three phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Three Phase RDTK (Auto-Transformer) - 14 amps
Three Phase RDTK (Auto-Transformer) - 14 amps
Three phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 2 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 2 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 3.5 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 3.5 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 6 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 6 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.

Overview

Direct Drive Air Handling Units with neat and compact design. Access can be on the left or right hand side (to be specified at time of ordering).

Mini Direct Drive Unit - Duties from 0.05m³/s to 2.25m³/s
A compact and economical range of units with directly driven centrifugal fans. There are six standard unit sizes. All the fans are speed controllable for added flexibility and incorporate Standard Thermal Overload Protection (S.T.O.P.). The standard unit consists of a rigid inlet connector, 100mm EU4 panel filter, l.p.h.w. or electric heater, direct drive centrifugal fan and rigid outlet connector. An optional Bag Filter (EU5) is available or Panel (50mm) and Bag arrangement.

Suitable for internal mounting as standard, models suitable for external mounting with optional roof canopy, inlet weather cowl and plastic coated panels (colour BS10A05) is available to order.

Specification
Direct Drive Fans have forward curved centrifugal impellers factory matched to an external rotor motor and statically and dynamically balanced to ISO 1940 as a complete assembly. The external rotor motors have sealed for life ball bearings. They incorporate Standard Thermal Overload Protection (S.T.O.P.) and are fully speed controllable. Insulation is class B and the enclosure IP44 to DIN 40050 with the electrical design corresponding to DIN IEC 38. Motors are suitable for ambient temperatures of up to 40°C and atmospheres up to 95% R.H.

Flexible Connectors
The Flexible Connectors are manufactured from Revertex JPT 20 with ductmate flanges to DW142.

LPHW Heater Batteries
L.P.H.W. Heater Batteries are constructed from copper tube, mechanically bonded to aluminium fins with the complete assembly housed in a galvanised steel casing. The coil headers and return bends are totally enclosed within the air handling unit casing. Flow and return connections are located on the same side of the unit and have male B.S.P. thread. L.P.H.W. Heater Batteries are pressure tested under water to 250p.s.i.

Electric Heater Batteries
Electric Heater Battery elements are constructed from Nichrome 5 spiral resistance wire surrounded by magnesium oxide powder and sheathed in stainless steel. The elements are carried on a galvanised steel frame. All electric heaters incorporate a thermal cut out device. Electrical connections are via a flush mounted terminal box on the outside of the air handling unit casing.

Technical

DIMENSIONS:

Standard Silencer (single skinned)

Unit
Diffuser
Stock Ref Number
Dimensions in mm
Approx
Weight kg

C
D

D1
54BC1
360
660
18

D2
54BC2
420
660
21

D3
54BC3
520
660
32

D4
54BC4
720
660
40

D5
54BC5
720
960
46

D6
54BC6
720
1260
50

Outlet Diffusers for Connection to Silencer: This item is essential when connecting a silencer directly to the discharge side of a fan section. The flanges at either end match the AHU and silencer dimension.
Inlet Damper

Unit
Inlet
Damper
Stock Ref No
Rigid
Connector
Stock Ref No
Flexible
Connector
Stock Ref No
Dimensions in mm
Approx
Weight kg

C
D
X

D1
57CD-66
54MC1
68FC-1
360
660
165
6

D2
57CD-2
54MC2
68FC-2
420
660
165
6.5

D3
57CD-3
54MC3
68FC-3
520
660
165
7

D4
57CD-4
54MC4
68FC-4
720
660
165
9

D5
57CD-5
54MC5
68FC-5
720
960
165
12

D6
57CD-6
54MC6
68FC-6
720
1260
165
25

Dampers are supplied with extended spindles - suitable for motorisation as standard. When using a damper, a rigid connector will also be required.

Unit A B C D E F1 F2 G H I J K L* M* N*
D1A 360 660 1560 280 580 102 168 172 580 430 280 130 200 625 1440
D1B 360 660 1560 280 580 102 232 172 580 430 280 130 200 625 1440
D2B 420 660 1560 340 580 232 204 93 580 430 280 130 250 625 1440
D3C 520 660 1560 440 580 146 287 281 580 430 280 130 300 625 1440
D3D 520 660 1560 440 580 146 287 281 580 430 280 130 300 625 1440
D4D 720 660 1560 640 580 146 287 432 580 430 280 130 500 625 1440
D4E 720 660 1710 640 580 160 365 456 580 430 430 130 500 625 1590
D5E 720 960 1710 640 880 160 365 456 580 430 430 130 500 925 1590
D5G 720 960 1710 640 880 188 365 435 580 430 430 130 500 925 1590
D5H 720 960 1710 640 880 188 365 435 580 430 430 130 500 925 1590
D6G 720 1260 1710 640 1180 188 365 435 580 430 430 130 500 1225 1590
D6H 720 1260 1710 640 1180 188 365 435 580 430 430 130 500 1225 1590
D6J 720 1260 1710 640 1180 188 730 435 580 430 430 130 500 1225 1590
---
No. Description
1 100mm Panel Filter (50mm to be fitted with Bag Filter)
2 305mm Bag Filter
3 LPHW Heater (1,2, or 3 row) or Electric Heater Battery
4 Fan
5 Weather Cowl
6 105mm Base (Aluminium) (EXTERNAL UNIT ONLY)

Accessories

Image of Single Phase SPM (Auto-Transformer) - 2 amps
Single Phase SPM (Auto-Transformer) - 2 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 3.5 amps
Single Phase SPM (Auto-Transformer) - 3.5 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 6 amps
Single Phase SPM (Auto-Transformer) - 6 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase SPM (Auto-Transformer) - 9 amps
Single Phase SPM (Auto-Transformer) - 9 amps
Single phase 5 Step Autotransformer speed controller. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Three Phase RDTK (Auto-Transformer) - 7 amps
Three Phase RDTK (Auto-Transformer) - 7 amps
Three phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Three Phase RDTK (Auto-Transformer) - 14 amps
Three Phase RDTK (Auto-Transformer) - 14 amps
Three phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 2 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 2 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 3.5 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 3.5 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.
Image of Single Phase RTRE (Enhanced Auto-Transformer) - 6 amps
Single Phase RTRE (Enhanced Auto-Transformer) - 6 amps
Single phase 5 Step Enhanced Autotransformer speed controller with additional terminals to allow connection of a remote a switching device. Downloads Catalogue Pages
Please call 0344 856 0590 for further availability information.

Downloads