Carrier AQUAZONE 50HQP072-120 Installation And Service Instructions Manual

Contents

24or before access to all connections is limited. Test pressuremay not exceed the maximum allowable pressure for the unitand all components within the water system. Carrier will notbe responsible or liable for damages from water leaks due toinadequate or lack of a pressurized leak test, or damagescaused by exceeding the maximum pressure rating duringinstallation.Antifreeze — In areas where entering loop temperaturesdrop below 4.4 C or where piping will be routed through areassubject to freezing, antifreeze is needed.Alcohols and glycols are commonly used as antifreezeagents. Freeze protection should be maintained to 8.3° C belowthe lowest expected entering loop temperature. For example, ifthe lowest expected entering loop temperature is –1.1 C, theleaving loop temperature would be –5.6 to –3.9 C. Therefore,the freeze protection should be at –9.4 C (–1.1 C – 8.3 C =–9.4 C).Calculate the total volume of fluid in the piping system. SeeTable 12. Use the percentage by volume in Table 13 to deter-mine the amount of antifreeze to use. Antifreeze concentrationshould be checked from a well mixed sample using a hydrome-ter to measure specific gravity.FREEZE PROTECTION SELECTION — The –1.1 C FP1factory setting (water) should be used to avoid freeze damageto the unit.Once antifreeze is selected, the JW3 jumper (FP1) shouldbe clipped on the control to select the low temperature(antifreeze –12.2 C) set point to avoid nuisance faults.Cooling Tower/Boiler Systems — These systemstypically use a common loop maintained at 15.6 C to 32.2 C.The use of a closed circuit evaporative cooling tower with asecondary heat exchanger between the tower and the waterloop is recommended. If an open type cooling tower isused continuously, chemical treatment and filtering will benecessary.Table 12 — Approximate Fluid Volume (L)per 30 M of PipeLEGENDNOTE: Volume of heat exchanger is approximately 3.78 liters.Table 13 — Antifreeze Percentages by VolumeGround Coupled, Closed Loop and PlateframeHeat Exchanger Well Systems — These systemsallow water temperatures from –1.1 to 43.3 C. The externalloop field is divided up into 51 mm polyethylene supply andreturn lines. Each line has valves connected in such a waythat upon system start-up, each line can be isolated for flush-ing using only the system pumps. Air separation should belocated in the piping system prior to the fluid re-entering theloop field.OPERATIONPower Up Mode — The unit will not operate until allthe inputs, terminals and safety controls are checked fornormal operation.NOTE: The compressor will have a 5-minute anti-shortcycle upon power up.Units with Aquazone™ Complete C ControlSTANDBY — Y and W terminals are not active in Standbymode, however the O and G terminals may be active, de-pending on the application. The compressor will be off.COOLING — Y and O terminals are active in Coolingmode. After power up, the first call to the compressor willinitiate a 5 to 80 second random start delay and a 5-minuteanti-short cycle protection time delay. After both delays arecomplete, the compressor is energized.NOTE: On all subsequent compressor calls the random startdelay is omitted.HEATING STAGE 1 — Terminal Y is active in heatingstage 1. After power up, the first call to the compressor willinitiate a 5 to 80 second random start delay and a 5-minuteanti-short cycle protection time delay. After both delays arecomplete, the compressor is energized.NOTE: On all subsequent compressor calls the random startdelay is omitted.HEATING STAGE 2 — To enter Stage 2 mode, terminal Wis active (Y is already active). Also, the G terminal must beactive or the W terminal is disregarded. The compressor re-lay will remain on and EH1 is immediately turned on. EH2will turn on after 10 minutes of continual stage 2 demand.NOTE: EH2 will not turn on (or if on, will turn off) if FP1temperature is greater than 7.2 C and FP2 is greater than43.3 C.EMERGENCY HEAT — In emergency heat mode, termi-nal W is active while terminal Y is not. Terminal G must beactive or the W terminal is disregarded. EH1 is immediatelyturned on. EH2 will turn on after 5 minutes of continualemergency heat demand.Units with Aquazone Deluxe D ControlSTANDBY/FAN ONLY — The compressor will be off.The Fan Enable, Fan Speed, and reversing valve (RV) relayswill be on if inputs are present. If there is a Fan 1 demand,the Fan Enable will immediately turn on. If there is a Fan 2demand, the Fan Enable and Fan Speed will immediatelyturn on.NOTE: DIP switch 5 on S1 does not have an effect uponFan 1 and Fan 2 outputs.HEATING STAGE 1 — In Heating Stage 1 mode, the FanEnable and Compressor relays are turned on immediately.Once the demand is removed, the relays are turned off andthe control reverts to Standby mode. If there is a master/slave or dual compressor application, all compressor relaysand related functions will operate per their associated DIPswitch 2 setting on S1.HEATING STAGE 2 — In Heating Stage 2 mode, the FanEnable and Compressor relays are remain on. The FanSpeed relay is turned on immediately and turned offIMPORTANT: All alcohols should be pre-mixed andpumped from a reservoir outside of the building or intro-duced under water level to prevent alcohols from fuming.PIPE DIAMETER (in.) [mm] VOLUME (gal.) [L]Copper 1 [25.4] 4.1 [15.5]1.25 [31.8] 6.4 [24.2]1.5 [38.1] 9.2 [34.8]Rubber Hose 1 [25.4] 3.9 [14.8]Polyethylene 3 / 4 IPS SDR11 2.8 [10.6]1 IPS SDR11 4.5 [17.0]1 1 / 4 IPS SDR11 8.0 [30.8]1 / 2 IPS SDR11 10.9 [41.3]2 IPS SDR11 18.0 [68.1]1 1 / 4 IPS SCH40 8.3 [31.4]1 1 / 2 IPS SCH40 10.9 [41.3]2 IPS SCH40 17.0 [64.4]IPS — Internal Pipe SizeSCH — ScheduleSDR — Standard Dimensional RatioANTIFREEZEMINIMUM TEMPERATURE FOR FREEZEPROTECTION (C)–12.2 –9.4 –6.7 –3.9Methanol (%) 25 21 16 10100% USP Food GradePropylene Glycol (%) 38 30 22 15Ethanol (%) 29 25 20 14