Installation
7
2. Mechanical Installation
2.1 Mounting
The unit must be fixed to a flat, vertical surface using the mounting holes (or slots) on its base-plate.
The mechanical outline diagrams give the dimensions and mounting hole positions for each model.
Ensure that:
•
The orientation of the unit has the ‘TOP’ uppermost.
•
The location allows adequate front access.
•
You can view the touchscreen.
•
Do not install other equipment that generates significant heat close to the soft starter.
2.2 Requirements for an Enclosure
For a typical industrial environment, an enclosure would provide the following:
•
A single location for the unit and its protection/isolation switchgear
•
The safe termination of cabling and/or busbars
Means to effect proper air flow through the enclosure.
2.3 Enclosure Ventilation
When fitting VMX-Synergy™ Plus into a cabinet, ventilation must be provided if the heat output
of the unit is greater than the cabinet will dissipate. Use the following formula to determine the
fan requirement. An allowance has been incorporated into the formula so that the figure for Q is
the air delivery in the fan suppliers’ data.
Heat dissipated can be approximated with the formulas:
Starting
Watts (VMX-Synergy Plus ™) = start current(A) x start time(s) x number of starts per hour/1200
iERs Disabled
Watts (VMX-Synergy Plus ™) = (VMX-Synergy Plus ™ current rating) x 0.6
iERs Enabled
The maximum power dissipation occurs when energy saving and the iERS is turned on
Watts (VMX-Synergy Plus ™) = (VMX-Synergy Plus ™ current rating) x 1.5
Where:
Q = volume of air (cubic metres per hour-m3/h)
Wt = Heat produced by the unit and all other heat sources within the enclosure (Watts)
T
max
= Maximum permissible temperature within the enclosure (50°C for a fully rated
VMX-Synergy Plus
TM
)
T
amb
= Temperature of the air entering the enclosure (°C).
If CFM is preferred, substitute °F for °C. Q is now in CFM
𝐐𝐐 =
𝟒𝟒 × 𝐖𝐖𝐖𝐖
(𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓 − 𝐓𝐓𝐓𝐓𝐓𝐓𝐓𝐓)