Daikin VAM-FA8VE Technical Data Manual page 143

10 Installation
10-3 Cautions
1) Operation in highly humid areas (in cooling mode)
To prevent dew formation, use the unit under the condition
that the indoor discharge air is 95% RH or less on the
psychrometric chart.
Temperature efficiency A%
Fig.1 shows the limit under normal indoor conditions.
Fig.1 Conditions:
Temperature efficiency A = 72%
Enthalpy efficiency B = 56% (In cooling)
This conditions are at the minimum efficiency that are the
severest to dew formation.
100
90
80
70
Available
60
50
40
20 30
Outdoor air temperature ( CDB)
2) Operation in cold areas (in heating mode)
To prevent dew formation and freezing, use the unit under the
conditions that the outdoor discharge air is 95% RH or less on
the psychrometric chart.
EA
OA
(In heating)
Temperature efficiency A%
• HRV • VAM-FA8VE
OA
SA
RA
Dry bulb temperature ( CDB)
(HC0067)
Not
available
Indoor conditions
25 C DB, 60% RH
22 C DB, 50% RH
22 C DB, 60% RH
40
(HC0068)
RA
Dry bulb temperature ( CDB)
(HC0069)
• HRV • Heat Reclaim Ventilation
Note:
If the outdoor discharge air exceeds 95% RH, please preheat
the outdoor suction air before it goes through the heat
exchanger.
8. Do not use HRV units where the air contains noxious
gas and corrosive components of materials such as
acid, alkali, organic solvent, carbon black and paint.
Also, do not use in a place where damage from sea
wind and hot spring prevail or where air containing
odor is recovered for supply to other locations.
9. Do not operate HRV units in [Bypass] ventilation
mode when the indoor is heated during winter.
Such operation may cause frost to form in the body and dirty
ceiling may result.
10. When a unit is installed on the ceiling using short
suspension bolts, abnormal noise may be generated
due to resonance with the ceiling.
Provide resonance preventive measures for the body suspension
bolts.
Example
Ceiling
HRV units
body
If abnormal noise is suspected generating from a spiral duct
connection, change the duct to flexible duct. The above
preventive measure is considered to eliminate the problem
(resonance) but contact our service group and provide means to
prevent vibration or necessary changes of the motor of the unit
body.
Motor
Caution
• When the outdoor air infiltrates into the ceiling and the
temperature and humidity in the ceiling become high, insulate the
metal part of the unit.
Vibration
isolating rubber
(HC0070)
Motor
Vibration isolating
rubber
Motor mount
(HC0071)
1
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