Line Voltage
Interface
Motor
Interface
Low Voltage
Interface
Dip Switch
Programmable
Settings
EPC Control
Board
© 1995-2009 Energy Saving Products Ltd.
Energy Saving Products Ltd. HE unit utilizes mass flow technology and will provide a constant CFM throughout
the programming range; environmental conditions will no longer dictate how the system will run, our new controller
will adjust voltage and frequency to maintain its programmed CFM (L/s). The Hi-Velocity HE Systems are field
programmable from 1.5 to 5 tons
(5.3 to 17.6 kW)
of cooling with the use of a single motor and controller assembly.
The tonnage is set by the pin settings 1,2,3 and 4 on the controller board, see the Dip Switch Control graphic for
reference. Detailed information on pin settings is supplied on
Module WIR - Wiring and Dip Settings Pg. 7 of 8
.
Dip Switch Control:
(Factory Setting, set for 1.5 tons/5.3kW)
Each programmed tonnage will have up to 5 adjustments for on-site fine tuning which is changed using pins 6,7
and 8. If you need to adjust the CFM
(L/s) output of your selected tonnage reference
Module WIR - Wiring and Dip
Settings Pg. 8 of 8
for pin settings to increase or decrease the output CFM (L/s).
Unit Configuration
Hi-Velocity Systems HE EPC Motor and Control Board
The HE Fan Coil uses Single Phase Power and the Control Board converts the power from Single Phase to
3 Phase for the EPC Motor. The Heavy Duty 3 Phase Motor provides years of reliable service, as the heavy
duty construction and power limiting function of the EPC controller minimizes motor stress and wear. The new
inverter drive technology offered by the EPC motor and controller reduces power consumption by up to 70%,
with an average overall yearly reduction of 50% over standard PSC motors. Noise related to excess power
input is eliminated.
The mass flow program senses the airflow and changes voltage and phase to maintain constant pressure and
CFM. The EPC controller will compensate for long or short duct installation, filter condition, wet/dry coils and a
variety of variables that effect outlet CFM. The program also compensates for high static filters and other inline
devices. Airflow related noise is reduced.
Service parts are limited for ease of maintenance – there is one motor, one controller, and one circuit board for
all HE Fan Coil units. The add-on Pulse Width Modulating Input (PWM Controller) provides total motor control
making multiple zoning easy without the need of by-pass air flow. The pressure sensing PWM Controller will
adjust the motor performance to maintain constant pressure in supply plenum. Cooling, Heating, and Constant
fan mode to compensate for damper operation and changing airflow demands, all while maintaining peak
energy efficiency with the variable frequency drive technology.
Module WIR
Hi-Velocity Wiring & Dip Settings (2/11)
Module WIR Hi-Velocity Wiring & Dip Settings (2/11)