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Toshiba VN-250SE Service Manual page 21

Heat exchange ventilators
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8-3. Installation Method
8-3-1. Model Installation
• You are required to prepare the ceiling suspension bolts, nuts and washers.
• Install the unit firmly and horizontally enough to support its weight. (Fig. 1)
• If you do not fit it firmly, it is not only dangerous but also easily vibrated.
If it is not fitted horizontally, the damper unit becomes defective in operation.
• When you are required to be cautious on prevention of vibration,
we recommend you to use the anti-vibration ceiling suspension
fixtures.
• Never fail to make an inspection opening with 450 mm or more at
the place shown on the paragraph of "Cautions For Operation", so
that you can inspect filters, Heat Exchanger, power source and
motors.
8-3-2. Cautions on Installing The Unit Body Upside Down
• Re-fit the ceiling suspension fixture in an opposite side. (If they are left as it is, the foolproof function of ceiling
suspension bolts do not work and will cause the danger of dropping of the unit.)
• Printed indication is in a reversed position.
In particular, be careful of the arrow mark [
8-4. Electric Works
Have a specialized working contractor perform wiring in accordance with the laws and regulations of the country
concerned.
• Connect the broken lines in the wiring diagram.
• We recommend that you use a switch having more than 3 mm distance to break contact and more than 15A
rated current.
Power Source
Divide the power lines running
to the switch and the main unit.
On the product. do not attach
more then one cable to each
terminal.
Operation Switch
(1) 0 (OFF)
(2) 1 (ON)
Air Flow Switch
(3) High
(4) Low
Function Select Switch
(5) Heat Exchange
Switch
Ventilation
(To be procured
(6) Normal Ventilation
locally)
To find out the function
of each switch.
CAUTION
ñ
Red
Supply
Capacitor
Air Fan
Orange
Yellow
Blue
Yellow
Low
Low
High
Whte
Extra
Black
High
Common
1 2 3 4 5 6 7
CN–
1
2
3
4
5
6
7
CN–
SAFM
EAFM
3
(LINE)
1
CN8
CN7
(NEUTRAL)
NC
NO
(1)
RY5
RY2
CM
(2)
1
TM1
(3)
2
L
3
N
(4)
COMMON
4
5
LOW
(5)
6
HIGH
(6)
DAMPER
7
(Srcond main body)
1
2
L
Power Source
N
3
4
5
LOW
HIGH
6
DAMPER
7
Third main body
] showing the direction of inserting a Heat Exchange.
Damper
Motor
Red
Exhaust
Capacitor
Air Fan
Orange
Blue
High
Whte
Extra
Black
High
Common
1 2 3 4 5 6 7 8
1 2 3 4 5
1
2
3
4
5
6
7 8
1 2 3
4
5
CN–DM
NC
NO
4
RY4
CM
1
CN6
CN5
RY4
NO
RY3
NO
NC
CM
RY3
CM
RY5
RY2
TM1
– 21 –
Nut
Washer
Ceiling Suspension
Fixture Washer
Nut
Ceiling Suspension Bolt
(Ø10 to Ø12)
Fig. 1
Model
Power Source
VN-250SE
220-240V~50Hz/
VN-350SE
220V~60Hz
VN-500SE
Model
Capacitor
VN-250SE
2.0µF 450VAC
VN-350SE
3.0µF 450VAC
VN-500SE
3.5µF 450VAC

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