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Cautions For Operation - Toshiba VN-250SE Installation Manual

Heat exchange ventilators
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FY250_CON-EN.fm Page 2 Friday, June 7, 2002 7:19 PM

Cautions for Operation

Never fail to make the inspection opening at the specific place on the ceiling so you can perform the constant cleaning or the
equipment checking of filter and heat exchange element.
I The inspection opening shown below is necessary to clean the heat exchange element and the filter as required. If not cleaned,
they are likely to get clogged, resulting in degradation of performance.
A
RA
SA
(Room
(Supply
Unit Body
Air)
Air)
EA (Exhaust Air)
OA (Outside Air)
Heat Exchange Element
Note) Model VN-250SE has one Heat Exchange Element.
Model No.
VN-250SE
VN-350SE
VN-500SE
I This Energy Recovery Ventilators should be installed at the place where a larger space than the sizes shown below can be
secured for the ceiling space.
I Don't install it near the water-heater.
I Refrain from the following duct installing works.
(1) Excessive bending
I Do not use in bathrooms or food preparation areas etc.
If you use the unit at the place of much soot and high humidity, the filter or the heat exchange element gets clogged and disables
you to use it.
I Use the Heat Exchange Ventilators in the ambient temperature of 40°C or less.
Never install the unit at the place where the flame likely reaches directly the unit. If you use it at the atmosphere of more than 40°C
for hours, it is likely to cause deterioration or deformation or damage of the resin part.
I Be careful of dewing and frosting.
As shown in the figure to the right, suppose a high temp absorbing air condition A and a low
temp absorbing air condition B are plotted on the air line figure, then a high temp air A is
heat-exchanged by the unit and goes out of the saturation curve as shown by Point C. In
this case, the unit will be dewed or frosted. To avoid this, you are required to heat a low
temp air B up to B' so as to get C' below the saturation curve, before using the unit.
2
600
Maintenance Space
Maintenance Space
Inspection Opening
450
(For the inspection of Filters, Heat
Exchange Elements, Fans, Motors
and Damper.)
Unit: mm
A
599
804
904
Model No.
VN-250SE
VN-350SE
VN-500SE
(2) Multi-times bending
A
SA
RA
(Supply
(Room
Unit Body
Air)
Air)
EA (Exhaust Air)
OA (Outside Air)
Heat Exchange Element
Note) Model VN-1KSAE has four Heat Exchange Elements.
Model No.
VN-800SE
VN-1KSAE
Ceiling Space A
Model No.
VN-800SE
320
VN-1KSAE
FY-01KZDY2B
(3) Making the connecting duct smaller
600
Maintenance Space
Inspection Opening
450
(For the inspection of Filters, Heat
Exchange Elements, Fans, Motors
and Damper.)
Unit: mm
A
884
1134
Unit: mm
Ceiling Space A
440
A
C
C'
B
B'
Dry-bulb temperature (° C)

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This manual is also suitable for:

Vn-350seVn-500seVn-800seVn-1ksae