Carrier PREMIERLINK 33CSPREMLK Installation And Configuration Manual

Contents

19Mounting — Mount the enthalpy switch/receiver in a locationwhere the outdoor air can be sampled (such as the outdoor airintake). The enthalpy switch/receiver is not a NEMA 4 enclo-sure and should be mounted in a location that is not exposed tooutdoor elements such as rain or snow. Use two field-suppliedno. 8 x 3/4-in. TEK screws. Insert the screws through the holesin the sides of the enthalpy switch/receiver.Wiring — Carrier recommends the use of 18 to 22 AWGtwisted pair or shielded cable for all wiring. All connectionsmust be made with 1/4-in. female spade connectors.A 24 vac transformer is required to power the enthalpyswitch/receiver; as shown in Fig. 20, the PremierLink™ boardprovides 24 vac. Connect the GND and 24 VAC terminals onthe enthalpy switch/receiver to the terminals on the transform-er. On some applications, the power from the economizer har-ness can be used to power the enthalpy switch/receiver. Topower the enthalpy switch/receiver from the economizer har-ness, connect power of the enthaply switch/receiver to the redand brown wires (1 and 4) on the economizer harness.For connection to split systems units with PremierLink con-trol, connect the LOW Enthalpy terminal on the enthalpyswitch/receiver to J4 — pin 2 of the PremierLink control on theunit. The switch can be powered through the PremierLink con-trol board if desired. Wire the 24 VAC terminal on the enthalpyswitch/receiver to J4 — pin 1 on the PremierLink control. Wirethe GND terminal on the enthalpy switch/receiver to J1 —pin 2 on the PremierLink control. The HI Enthalpy terminal isnot used. See Fig. 20.Differential Enthalpy Control Installation (Fig. 21) — Dif-ferential enthalpy control requires both an enthalpy switch/receiver (33CSENTHSW) and an enthalpy sensor(33CSENTSEN). The enthalpy switch/receiver is mounted inthe outdoor air inlet and calculates outdoor air enthalpy. Theenthalpy sensor is mounted in the return airstream and calcu-lates the enthalpy of the indoor air.The enthalpy switch/receiver energizes the HI Enthalpy re-lay output when the outdoor enthalpy is greater than the indoorenthalpy. The LOW Enthalpy terminal is energized when theoutdoor enthalpy is lower than the indoor enthalpy. The relayoutput is wired to the unit economizer which will open or closedepending on the output of the switch.NOTE: The enthalpy calculation is done using an average alti-tude of 1000 ft above sea level.Mounting — Mount the enthalpy switch/receiver in a locationwhere the outdoor air can be sampled (such as the outdoor airintake). The enthalpy switch/receiver is not a NEMA 4 enclo-sure and should be mounted in a location that is not exposed tooutdoor elements such as rain, snow, or direct sunlight. Usetwo field-supplied no. 8 x 3/4-in. TEK screws. Insert the screwsthrough the holes in the sides of the enthalpy switch/receiver.Mount the enthalpy sensor in a location where the indoor aircan be sampled (such as the return air duct). The enthalpysensor is not a NEMA 4 enclosure and should be mounted in alocation that is not exposed to outdoor elements such as rain orsnow. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insertthe screws through the holes in the sides of the enthalpy sensor.Wiring — Carrier recommends the use of 18 to 22 AWGtwisted pair or shielded cable for all wiring. All connectionsmust be made with 1/4-in. female spade connectors.The PremierLink board provides 24 vac to power theenthalpy switch/receiver. Connect the GND and 24 VACterminals on the enthalpy switch/receiver to the terminals onthe transformer. On some applications, the power from theeconomizer harness can be used to power the enthalpy switch/receiver. To power the enthalpy switch/receiver from the econ-omizer harness, connect power of the enthaply switch/receiverto the red and brown wires (1 and 4) on the economizerharness.Connect the LOW Enthalpy terminal on the enthalpyswitch/receiver to J4 — pin 2 of the PremierLink control on theunit. The switch can be powered through the PremierLink con-trol board if desired. Wire the 24 VAC terminal on the enthalpyswitch/receiver to J4 — pin 1 on the PremierLink control. Wirethe GND terminal on the enthalpy switch/receiver to J1 — pin2 on the PremierLink control. The HI Enthalpy terminal is notused. See Fig. 20.Fig. 18 — Enthalpy Switch/Receiver Dimensions(33CSENTHSW)Fig. 19 — Enthalpy Sensor Dimensions(33CSENTSEN)