Hitachi KPI Installation And Operation Manual page 23

INSTALLATION
13.1. INITIAL CHECK
Install the unit with a proper clearance around it for operation and
−
maintenance working space, as shown in below figure.
Consider the air distribution from the unit to the space of the room,
−
and select a suitable location so that uniform air temperature in the
room can be obtained.
KPI-(252~2002)(E/H)2E
−
Service
Space
Service Access Panel
KPI-3002H2E
−
Service Access Panel
Avoid obstacles which may hamper the air intake or the air discharge
−
flow.
Select a position for introducing the outside air where no exhaust or
−
combustion gases will be sucked into the product and where it will
not be covered by snow.
Do not use this product at the cold are during winter time, with the
−
environmental condition that dewing may occur in the heat exchange
element (the case that the line connecting the protted points of the
outdoor/indoor temperature and humidity conditions crosses the
saturation curve on the psychometric diagram).
In such a case, heat the A (Outdoor Air) up to the A' point and make
−
the condition that the line connecting the protted points of the
outdoor/indoor temperature and humidity conditions does not cross
the saturation curve, and the total heat exchanger can be used.
−
The limit of the environmental conditions for using the total heat
exchanger are shown in the table below as an example, at the outdoor
air temperature 0 °C, -5 °C and -10 °C with the indoor air temperature
Electrical
30 °C.
control box
In case that the indoor air humidity is higher than this condition or the
outdoor air humidity is extremely high, dewing may occur.
Service Panel
The dew may grow up to the drop and the water may flow out of the unit.
Service
Space
13.2.MOUNTING OF INDOOR UNIT
1. Preparing the sling Bolts.
Electrical
control box
2. Hanging the Unit.
−
−

The heating method for the A (Outdoor Air) must be determined
according to the local codes, etc.
Dry bulb (ºC)
Outdoor Air Indoor Air
Temperature Temperature
(DB) (DB)
0ºC 30ºC
-5ºC 30ºC
-10ºC 30ºC
Rubber Isolator
Hang the suspension bracket on the anchor bolts and adjust in
such a way that the unit is installed horizontally.
Tighten up securely using double nuts in order to prevent
looseness.
CAUTION
When suspending the main unit from the ceiling, do not handle it
in such a way that force will be applied to the control box.
PMML0185 rev.1 - 03/2010
Saturation Curve
Indoor Air Indoor Air
Relative Absolute
Humidity Humidity
(%) (kg/kg)
47 0.0125
41 0.0105
34 0.0090
Anchor Bolt (M10 or M12)
Nut
Washer
Nut
23