Carrier PREMIERLINK 33CSPREMLK Installation And Configuration Manual

Contents

21Wiring Enthalpy Sensors — To wire the enthalpy sensor, per-form the following (see Fig. 24 and 25):NOTE: To mount outdoor air sensor remotely, remove it fromback of enthalpy control and follow steps 3 and 6.1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable toconnect the return air enthalpy sensor to the differentialenthalpy control. Use a 4-conductor, 18 or 20 AWG cableto connect the enthalpy control to the PremierLink con-troller and power transformer.2. At the differential enthalpy control remove the factory-installed resistor from the SR and (+) terminals.3. Connect the RED wire from the 2-conductor cable whichoriginates from the return air enthalpy sensor to theSR (+) terminal. Connect the BLK wire to the SR (–)terminal.4. Connect the following 4 wires from the 4-wire conduc-tive cable to the differential enthalpy controller:a. Connect the RED wire to the 24 vac terminal(TR1) on enthalpy control and to pin 1 on 12-pinharness.b. Connect the BRN wire to the 24 vac GND terminal(TR) on enthalpy sensor and to pin 4 on 12-pinharness.c. Connect the ORN wire to J4-2 on PremierLinkcontroller and to terminal 3 on enthalpy sensor.d. Connect the RED wire to J4-1 on PremierLinkcontroller and to terminal 2 on enthalpy sensor.5. At the return air enthalpy sensor, strip 3 in. of jacket fromthe cable and remove 1/2 in. of insulation from eachconductor.6. Connect the RED wire to (+) spade connector on thesensor. Connect the BLK wire to (S) spade connector onthe sensor. Use wire nuts or closed-end crimp-type con-nectors to fasten the connections securely. See Fig. 22.Economizer — The PremierLink™ controller will inter-face with the 40RM economizer. Economizers will contain aHoneywell actuator (Honeywell part number M7415).An adapter (Honeywell part number Q769B or Q769C ispreferred) must be used to enable the 4 to 20 mA signal fromthe PremierLink controller to control the position of the econo-mizer. Refer to Honeywell Q769B and Q769C accessory in-stallation instructions for wiring details.Disconnect power supply before making wiring connec-tions to prevent electrical shock and equipment damage.To avoid permanent damage to the PremierLink 4 to20 mA connection, a signal loop isolator must be installedwhen using the Q769B adapter.24 VAC OUTPUT FROM N/C CONTACT WHEN THEOUTDOOR ENTHALPY IS LESS THAN THEINDOOR ENTHALPY(ENABLE ECONOMIZER)24 VAC OUTPUT FROM N/O CONTACT WHEN THEOUTDOOR ENTHALPY IS GREATER THAN THEOUTDOOR ENTHALPY(ENABLE ENERGY RECYCLER)24 VACSECONDARYHI LOW GND 24VACENTHALPY 4-20mAIN24-36VDCOUT120 VAC LINE VOLTAGEJUMPER SETTINGS FOR 33CSENTHSWM1M2M30%50%100%OFF33CSENTHSWJUMPER SETTINGS FOR 33CSENTSENM1M2M30%50%100%OFF33CSENTSEN4-20mAOUT24-36VDCINFig. 21 — Differential Enthalpy Control WiringLEGENDN/C — Normally ClosedN/O — Normally Open