Installation and Maintenance
ECOSMART Direct Drive Roof Mounted Twinfans
2
All units have an internal connection box requiring connection
to the mains supply on installation. It is the installers
responsibility to drill the case to provide access for the
electrical cables. Care should be taken not to damage internal
components and the cable entry should be properly sealed.
A small commissioning box is provided on the outside of
the case.
NOTE: A Commissioning Procedure document (leaflet No.
671154) is available on request from the Nuaire Technical
Library Tel: 02920 885911.
The unit should be securely screwed to its curb or mounting to
prevent vibration and/or wind damage. Note that on the bottom
inlet (EST-B) units, the cabling could be carried up from inside
the building through the bottom inlet spigot.
Prefabricated Curb
CODES: ESPFC* (typical)
Manufactured in
pre galvanised steel
these curbs will reduce
design work and guarantee
correct unit mounting when on site.
Note: Upper faces of curb are fitted with robust sealing strip.
Table 3. Prefabricated curb dimensions (mm)
Roof Upstand Mounting
Casing skirt depth
The fan casings have an inside skirt depth of 60mm or, in the
case of the largest size units only, 50mm.
It is recommended that the units are mounted upon a suitable
curb or upstand which has a minimum height of 150mm
(inclusive of the timber capping if applicable, see curb
dimensions).
This mounting height provides adequate distance to avoid any
standing water on the roof being drawn into the fan (this can
occur on bottom inlet installations if a unit is not properly
installed and an air leak in the unit /ductwork joint is pulling
air over the curb. The recommended height will also ensure that
the unit does not ‘stand’ on its skirt edge.
Unit
Prefab
Code
Curb Code
A
B
C
EST1-*
ESPFC1
635
435
250
EST2-*
ESPFC2
805
650
250
EST3-*
ESPFC3
900
650
250
EST4-*
ESPFC4
1095
910
250
EST5-*
ESPFC4
1095
910
250
EST6-*
ESPFC4
1095
910
250
EST9-*
ESPFC5
1425
1045
250
Figure 3.
Figure 4. Roof curbs
Table 4. Dimensions (mm)
Unit
Prefab
Code
Code
A
B
C
D
E
F
G
EST1-*
ESPFC 1
535
335
665
465
621
421
50
EST2-*
ESPFC 2
700
550
830
680
791
636
50
EST3-*
ESPFC 3
795
550
925
680
886
636
50
EST4-*
ESPFC 4
940
760
1120
940
1105
920
75
EST5-*
ESPFC 4
940
760
1120
940
1105
920
75
EST6-*
ESPFC 4
940
760
1120
940
1105
920
75
EST9-*
ESPFC 5
1265
900
1445
1080
1435
1065
75
16. 06. 15. Leaflet Number 671142
Roof Opening and Curb Dimensions
For bottom inlet only
