Carrier AquaSnap 30RAP010-150 Installation Instructions Manual

Also see for AQUASNAP 30RAP010-150: Start up & operation manual Installation instructions Controls, start-up, operation, service, and troubleshooting Controls, start-up, operation, service, and troubleshooting

Carrier AquaSnap 30RAP010-150 Installation Instructions Manual Manual pdf 53 page image

53FIELD CONNECTIONSMain Power — Bring wires from the fused disconnect switchthrough hole in the middle of the right hand corner post to thebottom of the control box and connect to terminals on terminalblock or non-fused disconnect. A 7/8-in. hole is provided in thecorner post to locate the center of the field power entry. Tocomply with NEC Article 440-14, the disconnect must be lo-cated within sight from and readily accessible from unit. Referto Fig. 33.Control Power — Control power is obtained from the mainpower supply and does NOT require a separate source. Atoggle switch (marked Emergency On-Off on the unit labeldiagram and by the switch) allows the control circuit to bemanually disconnected when necessary.Step 6 — Install AccessoriesELECTRICAL — A number of electrical accessories areavailable to provide the following optional features (for details,refer to the Controls, Start-Up, Operation, Service, andTroubleshooting book):Energy Management Module (Used for any of the followingtypes of temperature reset, demand limit and ice features):• 4 to 20 mA leaving fluid temperature reset (requiresfield-supplied 4 to 20 mA generator)• 4 to 20 mA cooling set point reset (requires field-supplied 4 to 20 mA generator)• Discrete inputs for 2-step demand limit (requires field-supplied dry contacts)• 4 to 20 mA demand limit (requires field-supplied 4 to20 mA generator)• Discrete input for Ice Done switch (requires field-supplied dry contacts)Navigator™ Display — The device provides hand-held,mobile capability using an easy to read 4-line display. The key-pad function is the same as the scrolling marquee module. Amagnet is provided for ‘hands free’ service of components.Low Ambient Operation — If outdoor ambient operatingtemperatures below 45 F (7 C) on size 018-030 units or 32 F(0° C) on size 035-150 units are expected, refer to separate in-stallation instructions for low-ambient operation using accesso-ry Motormaster® V control. Size 010 and 015 units have Mo-tormaster V installed as standard.Minimum Load Accessory — If minimum load accessory isrequired, refer to unit Price Pages or contact your local Carrierrepresentative for more details. For installation details, refer toseparate installation instructions supplied with the accessorypackage.Miscellaneous Accessories — For applications requiring spe-cial accessories, the following packages are available: externalvibration isolation, remote enhanced display, temperature reset,hail guard/security grilles, storage tank, wind baffles, and re-mote cooler. For installation details, refer to separate installa-tion instructions supplied with these accessory packages.Step 7 — Check Refrigerant CircuitLEAK TESTING — Units are shipped with complete operat-ing charge of R-410A (refer to physical data tables) and shouldbe under sufficient pressure to conduct a leak test. Perform aleak test to ensure that leaks have not developed during unitshipment. Dehydration of the system is not required unless theentire refrigerant charge has been lost. Repair any leak foundusing good refrigeration practice.DEHYDRATION — Refer to Carrier Standard Service Tech-niques Manual, Chapter 1, Refrigerants, Sections 6 and 7 fordetails. Do not use compressor to evacuate system.REFRIGERANT CHARGE (Refer to Tables 1A and1B) — Immediately after the condenser coil in each circuit is a1/4-in. Schrader connection for charging liquid refrigerant.Utilization of Novation® condenser coil technology enablesthe 30RAP chiller to have a very low refrigerant charge. There-fore, if field charging is required, accurately charging to thecorrect quantity is very important. It is necessary to ensure thatthe system is completely evacuated before charging and thatthe refrigerant charge is accurately weighed to within 1% of thenameplate quantity or the unit may not operate correctly.The suction lines are provided with a 1/4-in. Schrader fittingfor connecting to low-side system pressure. The location of thesuction access port is shown in Fig. 34.IMPORTANT: To ensure power to the heaters, make sureauxiliary power to the unit and the compressor circuitbreakers is always on (except for servicing or prolongedshutdown). Since all water cannot be drained completely,add an appropriate amount of inhibited glycol as noted forwinter shutdown.CAUTIONProper rotation of condenser fan(s) MUST be verifiedbefore pumps or compressors are started. Consult the Con-trols, Start-Up, Operation, Service and Troubleshootingmanual provided with this chiller for correct procedure. Ifpump(s) have been removed for trimming, verify that wir-ing is reconnected in the original manner.CAUTIONWhen charging, circulate water through the cooler at alltimes to prevent freezing. Freezing damage is consideredabuse and may impair or otherwise negatively affect theCarrier warranty.CAUTIONDO NOT OVERCHARGE system. Overcharging resultsin higher discharge pressure, increased power consump-tion, and possible compressor damage.