Toshiba VN-250TE Installationshandbuch Seite 4

VN250_CON-01EN.fm Page 2 Thursday, September 8, 2005 10:36 AM
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.
■ 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-250TE has one Heat Exchange Element.
Model No.
VN-250TE
VN-350TE
VN-500TE
■ This Heat Exchange Ventilators should be installed at the place where a larger space than the sizes shown below can be secured
for the ceiling space.
■ Don't install it near the water-heater.
■ Refrain from the following duct installation works.
(1) Excessive bending
■ 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.
■ 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.
■ 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-250TE
VN-350TE
VN-500TE
(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-1KTAE has four Heat Exchange Elements.
Model No.
VN-800TE
VN-1KTAE
Ceiling Space A Model No.
VN-800TE
320
VN-1KTAE
(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)