Price FDV Series, Ручная установка

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Fan Powered Variable Volume Terminal uniTs
9
priceindustries.com | FAn Powered VArIAbLe VoLume TermInAL unITs - manual
INSTALLATION & MOUNTING INSTRUCTIONS
Fan Performance Curves - eCm motor
Selection Guideline
To properly select a Price fan powered terminal unit with ECM
motor, refer to the fan performance curves below. The fan
curves give the range of external static pressure available at
the discharge versus the range of air volumes. Fan selection
must be within the bolded fan curve lines.
The shaded area shown on the fan curves gives the range of
constant fan flow operation for each size unit for external static
pressures from 0.1 to 0.5 in. w.g. In this shaded area fan flow
can be factory set to design conditions. Selection outside the
shaded area is allowable. However, fan flow will vary according
to the external static pressure applied to the fan.
The solid state speed controller allows selection anywhere
within the minimum and maximum fan flows. Selections in the
mid-volume range are recommended to reduce noise level and
provide flexibility for future changes. The speed controller can
be factory set but can also be easily field adjusted if changes
are required.
When selecting a fan size from the performance curves, the
static pressure loss of any accessories must be taken into
account. The effect of the resistance of hot water heating coils
on the fan performance is indicated on separate fan curves.
For electric heating coils, the range for no coil can be used.
If a fan selection is made near the maximum rated fan capacity
and actual downstream system pressure is higher than
anticipated, design volume will not be achieved.
Note that in all cases a downstream resistance to the fan of
at least 0.10 in. w.g. must be maintained to avoid overloading
of the fan motor. For terminal units with electric reheat a
minimum discharge static of 0.2”w.g. is recommended for
stable operation of heater controls.
uniT siZe 10 - no Coil, 1 & 2 row Coil
uniT siZe 30 - no Coil
uniT siZe 30 - 1 row Coil
uniT siZe 30 - 2 row Coil
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