Therm-X MVHRU HR95
Technical Manual
Page 53 of 59
Version 2.4, 25/09/2020
3.
Access and maintenance
3.1.
Access to all the unit compartments shall be available through the side or top tool operated access panels.
3.2.
All the access panels shall be fully removable allowing access to the fan, filter and ancillary coil sections and
providing access for periodic inspection.
3.3.
Handles shall be provided on all access panels to facilitate handling during maintenance operations.
3.4.
All top access panels shall be supported by an hydraulic strut to allow access to these compartments with
minimum effort.
3.5.
The control panel shall be mounted on an accessible thermal insulated compartment inside the unit casing.
4.
Fans
4.1.
The unit shall be supplied with high performance supply and extract, single inlet plug fans.
4.2.
The impellers shall be manufactured of continuously welded backward curved aluminium blades.
4.3.
The fans shall be directly driven by low energy consumption IE4 electronically commutated (EC) motors.
4.4.
The assembly shall be statically and dynamically balanced as per DIN / ISO 1940 to balancing grade G 6.3.
4.5.
The fan assembly is installed on a highly rigid galvanized support structure and fitted with an aerodynamically
optimized galvanized inlet.
4.6.
The fan shall comply with the efficiency requirements of regulation 327/211 of the Eco-design directive for
fans.
4.7.
The motor insulation shall be Class ‘B’, rated IP 54 (acc. to EN 60529) and meet all relevant EMC directives
and requirements.
5.
Filters
5.1.
Filtration shall be provided by means of compact, low pressure drop, synthetic media filters.
5.2.
Grade of filtration according to BS EN779:2012/ISO 16890 shall be class G4 (ePM
coarse
60%) and F7 (ePM
2.5
50%) on supply and G4 (ePM
coarse
60%) on extract.
5.3.
The filters shall be mounted on slides for easy removal and tightly sealed against the rails to ensure reduced
filter bypass leakage.