Auxiliary Relay
Connections
Line Voltage
Control Interface
Low Voltage
Control Interface
Thermostat
Connections
20 VA Transformer
Connections
Timer On/Off Switch
Timer Chip
Hot Water
Zone Valve
Condensing
Unit
Anti-Ice
Control
EPC Circuit
Board
© 1995-2009 Energy Saving Products Ltd.
Energy Saving Products Ltd. now utilizes automatic voltage and frequency recognition circuitry designed for the
national and international market. This unique feature will automatically recognize and adjust to the voltage and
frequency input. It doesn’t matter if it is 115 or 230 volt, 50 or 60 cycle, our electronics will adjust to the input
automatically.
The Circulator Timer Chip on our circuit board will energize the pump for 5 minutes every 24 hours. This timing
cycle starts when power is turned on to the fan coil unit, and will be engaged at the same time every day. If
you wish to have the timer cycle operate at a specific time of day, simply turn off power to the fan coil unit for
three seconds at that time, and then turn the power back on. If you do not need to use the timer circuit, move
the jumper header from the ON pins to the OFF pins and it will be disabled.
Hi-Velocity Systems HE EPC Circuit Board
Module WIR
Hi-Velocity Wiring & Dip Settings (1/11)
Module WIR Hi-Velocity Wiring & Dip Settings (1/11)
The Hi-Velocity Circuit board makes wiring of the unit a quick and simple task. With clearly labeled connections,
it is easy to wire in the thermostat. The fan coil is prewired for both heating and cooling with no additional relays
typically required. The Circuit board works as a relay system to the heating and cooling components connected
within the system. The Circuit Board supplies the thermostat with 24v power, which works as a signal to the
circuit board to operate the EPC Control board to its designed variable fan speeds that controls the motor.
The Circuit board is pre-wired to send control signals to heating sources such as boilers, dual purpose hot
water heaters, heat pumps, and geothermal systems, as well our manufactured slide-in electric module (ESH).
The circuit board is also designed to send control signals to cooling sources such as condensing units, chillers,
heat pumps and geothermal systems.
The circuit board features an Auxiliary Relay with Dry Contact connections, so that any application requiring 24
volt, 110 volt, 230 volt, or dry contacts (boilers, hot water heaters, heat pumps, humidifiers) can be automatically
started when there is a call for heat. A dynamic pump duty cycle chip is also provided to prevent water stagnation
in potable water systems, and to provide pump rotor protection for water source heating and cooling.
