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8
Environment - Installation
Enclosure Ventilation
When installing a VMX-Synergy Plus
™ into an enclosure, 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
supplier’s 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
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)
Tmax = Maximum permissible temperature within the enclosure (50°C for a fully rated VMX-
Synergy Plus
™)
Tamb = Temperature of the air entering the enclosure (°C)
If you prefer to work in CFM, substitute °F for °C. Q is now in CFM
Control Power Consumption
VMX-SGY-I-17 to VMX-SGY-I-361 = 60W
VMX-SGY-I-430 to VMX-SGY-I-500 = 120W
Summary of Contents for VMX-Synergy Plus VMX-SGY-I-100
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