2
Cautions for Operation
■
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.
■
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.
Unit: mm
■
Don't install it near the water-heater.
■
Refrain from the following duct installing works.
■
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.
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.
Model No.
Ceiling Space A
Model No.
Ceiling Space A
VN-250SE
320
VN-800SE
440
VN-350SE
VN-1KSAE
VN-500SE
FY-01KZDY2B
600
A
600
A
Unit Body
SA
(Supply
Air)
Maintenance Space
RA
(Room
Air)
EA (Exhaust Air)
Heat Exchange Element
OA (Outside Air)
Inspection Opening
450
(For the inspection of Filters, Heat
Exchange Elements, Fans, Motors
and Damper.)
Maintenance Space
Unit Body
SA
(Supply
Air)
RA
(Room
Air)
EA (Exhaust Air)
Heat Exchange Element
OA (Outside Air)
(For the inspection of Filters, Heat
Exchange Elements, Fans, Motors
and Damper.)
Maintenance Space
Inspection Opening
450
Note) Model VN-250SE has one Heat Exchange Element.
Unit: mm
Model No.
A
VN-250SE
599
VN-350SE
804
VN-500SE
904
Note) Model VN-1KSAE has four Heat Exchange Elements.
Unit: mm
Model No.
A
VN-800SE
884
VN-1KSAE
1134
20
A
(1) Excessive bending
(2) Multi-times bending
(3) Making the connecting duct smaller
A
B
C
C'
B'
Dry-bulb temperature (° C)
A
b
so
lu
te
hum
idity
(kg
/kg
’)
S
at
ua
tio
n
C
ur
ve
FY250_CON-EN.fm Page 2 Friday, June 7, 2002 7:19 PM
