Hitachi RAS-3HVNC1 - 10 BASIC TROUBLESHOOTING; Common Troubleshooting Issues and Solutions

d) In case that upper side obstacles exist (serial units) e) In case of front side and either of the sides are open (serial units)
200
300
0 < L ≤ 1/2 H A ≥ 500
1/2 H < L ≤ H A ≥ 1000
≤ 300
f) In case that surrounding wall exist (serial units)
0 < L ≤ 1/2 A ≥ 500
1/2 H < L ≤ H A ≥ 1000
A
L
1000
0 < L ≤ 1/2 H A ≥ 200
1/2 H < L ≤ H A ≥ 350
g) Horizontal (multiple units) h) Vertical (multiple units)
0 < L ≤ 1/2 H A ≥ 100
1/2 H < L ≤ H A ≥ 200
≥ 1000
≥ 400
≥ 2000
≥ 250
400
≥ 250
≥ 250
400
250
≥ 250
Do not stack more than two units in height. - Close gap (*) to avoid recirculating discharge air ow.

Installing location where the unit will be exposed to strong wind
Follow the instructions below to install on the rooftop or a
location without surrounding buildings, where strong wind is
expected against the product.
Choose a location where the outlet or inlet side of the product
will not be exposed to strong wind.
When the outlet is exposed to strong wind:
Direct strong wind may cause lack of air ow and adversely
affect to the operation.
! CAUTION
Excessive strong wind against
theoutdoorunitoutletmaycause
inverse rotation and damage the
fanandmotor.
In case of blowing strong wind to air outlet the wind guard
(optional) is available to avoid strong wind
Wind guard
Wind guard model
Model
Number of
set required
WSP-264 1
? NOTE
• Thewindguardmustbesetatannualcoolingoperation(inDSW2switch3).
• Forambienttemperature≤10ºC,itisrecommendedtosetthewindguardatcoolingoperation.
UNITS INSTALLATION
PMML0398B rev.0 - 11/2015 - P5416651
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