Hitachi RPI-16.0FSN3PE - Fan Performance and Static Pressure Settings; Air Filter Servicing and Fan Performance; Static Pressure Setting and Notes


Suction Air Filter Servicing
Filter maintenance could be performed from right or left side of the unit.
Remove lter support (x2 screws / each support) and pull out the lter from the handle.
In those installations where the servicing space is narrow, the lter could be bent (in three pieces) when pulling it out.
Air Filter Support Remo-
ving Direction
Air Filter
3.1.3 Fan Performance Curve
RPI-16.0FSN3PE RPI-20.0FSN3PE
External static pressure (Pa)
100120 140160
External static pressure (Pa)
120140 160180
Airow (m
3
/min) Airow (m
3
/min)
Fan Speed Static Pressure Hi Med Low
HSP (Std. Factory Setting) v1 v1 v3
LSP v2 v2 v4
HSP: High Static Pressure
LSP: Low Static Pressure
NOTE
• When design a duct, check to ensure that the Air volume is within working range as indicate “Fan Performance Curve”.
• If the Air volume is set outside working range, water-carry-over (drop in the ceiling or into the room), noise increases, fan motor
damaged (high temperature), insufcient Cooling/Heating capacity, phenomena can occur.
• Therefore design ducts and select the correct fan speed in order to keep the unit running in the accepted working range.
3.1.4 Static Pressure Setting
RPI units have been provided by two static pressure levels regulation depending on the installation requirements:
High static pressure (Std. Factory Setting) and low static pressure connectors are available into the Electrical Box.
Setting of static pressure shall be made by changing the Fan Unit connector.
CAUTION
The static pressure setting must be the same in both units.(There are 2 Electrical boxes, so connector change must be made in both
of them).
5
PMML0323A rev.2 - 06/2014
3 Units installation
ENGLISH