QTS8000 REPLACE POWER BOARD

A/ENT-CTRL - The A/ENT-CTRL is an enthalpy controller which is used to measure temperature and humidty before converting them into a sourced relay output.  The supply voltage to the A/ENT-CTRL is common to both the N/O or N/C contacts of the 10A Form 1C Relay. (The A/ENT-CTRL-F1C's ouput acts as a dry contact rather than sourcing the supply voltage).  Each unit in this series features a coated circuit board and jumper selectable elevation setting.  The A/ENT-CTRL is covered by ACI's Five (5) Year Limited Warranty.

TRANSMITTER BOARD

EPC2 - The EPC* is an electric to pneumatic transducer which converts an analog input signal to a proportional pneumatic outpu modulating its control valve(s) to regulate the branch line pressure to the set point determined by the input signal. The EPC* offers four selectable input ranges of 0 to 0 to 1 0 to 15 VDC and 0 to 20 mA. Output pressure ranges are jumper shunt selectable for 0 to 1 0 to 15 and 0 to 20 psi and adjustable in all ranges. A 0-5 VDC feedback signal indicating the resultant branch line pressur is also provided. This signal varies linearly with branch pressure range selected. EPC's are designed with electrical terminals on one end and pneumatic connections on the othe allowing for maximum convenience in wiring and tubing installation when panel mounted. The EPC is a constant bleed interface with branch exhaust response time determined by the bleed orifice size and pressure differentials. If power fails to the EP it will continue to bleed through the bleed orifice until branch pressure is zero psig. Three way mixing valve control Pilot positioner control Compressor stagin Chiller loading

RESISTOR NETWORK 0-135