9 Servicing
KPI-(252-2002)(E/X)4E - Energy recovery and active energy recovery ventilation units
SMGB0099 rev.0 - 12/2016
335
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9.11 KPI-(252-2002)(E/X)4E - Energy recovery and active energy recovery
ventilation units
9.11.1 System description
An example of the system is shown below. Make sure the system has been checked by a HITACHI distributor.
Exchange mode
The air returning from the indoor part passes through the total
heat exchanger unit and is expelled outdoors.
The outdoor air is supplied through the total heat exchanger.
Ventilation bypass mode
The air from indoors is expelled without heat exchange.
Damper
Exhaust air
Outdoor air
Supply air
Return air
Damper
Exhaust air
Outdoor air
Supply air
Return air
Automatic selection mode
(Factory-set). The operating mode is selected automatically according to the temperature conditions (outdoor, indoor and set).
9.11.2 Structure and part names
KPI-(252-2002)E4E and KPI-(502-1002)X4E
Nº Part
1 HEX/Filters Service Cover
2 Electrical Box
3 Damper
4 Return air fan motor
5 Active module (only KPI-(502-1002)X4E)
6 Evaporator service cover (only KPI-(502-1002)X4E)
7 Expansion Valve (only KPI-(502-1002)X4E)
8 Evaporator (only KPI-(502-1002)X4E)
9 High efciency lter (optional)
10 Heat exchanger
11 Supply air fan motor
12 OA - Outdoor Air
13 SA - Supply Air
14 RA - Return Air
15 EA - Exhaust Fan
9.11.3 Service cover location
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