Carrier Aquazone 50RHE 006 Installation, Operation And Maintenance Instructions

Carrier Aquazone 50RHE 006 Installation, Operation And Maintenance Instructions

Water-source heat pumps - horizontal units

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TM
50RHE 006-060
Water-Source Heat Pumps -
Horizontal Units
Installation, Operation and Maintenance Instructions
Carrier is participating in
the Eurovent Certification
Programme. Products are
as listed in the Eurovent
Directory of Certified
Products.

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Summary of Contents for Carrier Aquazone 50RHE 006

  • Page 1 50RHE 006-060 Water-Source Heat Pumps - Horizontal Units Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products. Installation, Operation and Maintenance Instructions...
  • Page 2: Table Of Contents

    CONTENTS 1 - SAFETY CONSIDERATIONS ................................3 2 - GENERAL ......................................3 3 - INSTALLATION ....................................3 3.1 - Check jobsite ......................................3 3.2 - Check unit ......................................3 3.3 - Unit location ......................................7 3.4 - Mounting the unit ....................................8 3.5 - Duct system ......................................
  • Page 3: Safety Considerations

    1 - SAFETY CONSIDERATIONS 3 - INSTALLATION Installation and servicing of air-conditioning equipment can be 3.1 - Check jobsite hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, Installation, operation and maintenance instructions are provided or service air-conditioning equipment.
  • Page 4 10. Provide ready access to water valves and fittings, and screw- 3.2.3 - Inspect unit driver access to unit side panels, discharge collar, and all To prepare the unit for installation, complete the procedures electrical connections. listed below: 11. Where access to side panels is limited, pre-removal of the Compare the electrical data on the unit nameplate with control box side mounting screws may be necessary for ordering and shipping information to verify that the correct...
  • Page 5 Fig. 1 - Dimensions 50RHE 006-012 015-024 042-048 Overall cabinet A (width) B (depth) 1095 1095 1351 1351 1580 1808 C (height) Water connections E (water out) Electrical knockouts J (1/2 conduit) low voltage K (1/2 conduit) ext. pump L (3/4 conduit) power supply Discharge connection ±...
  • Page 6 Fig. 2 - Typical installation - 50RHE units Return loop 3/8” threaded rods Supply loop (by others) Water in Filter access Water out Return air (ductwork not shown) Thermostat wiring Field-supplied transition to Balancing valve minimise pressure loss Power wiring (field-installed and Field-supplied calibrated accessory)
  • Page 7: Unit Location

    3.3 - Unit location Fig. 3 - Conversion left return, side discharge to back discharge The following guidelines should be considered when choosing Water Remove screws a location for a water-source heat pump unit: connection end • Units are for indoor use only. •...
  • Page 8: Mounting The Unit

    3.4 - Mounting the unit 3.6 - Condensate drain Horizontal units should be mounted using the factory-installed Slope the unit toward the drain at a 6.5 mm per 300 mm pitch hangers. Proper attachment of hanging rods to building structure (see Fig.
  • Page 9: Piping Connections

    13 mm closed cell insulation on all piping surfaces ground-water and ground-loop. Refer to piping section of to eliminate condensation. Carrier System Design Manual for additional information. • Avoid all plastic-to-metal threaded fittings due to the potential to leak. Use a flange fitted substitute.
  • Page 10: Electrical Wiring

    Water supply and quantity 3.8 - Electrical wiring Check water supply. Water supply should be plentiful and of good quality. See Table 2 for water quality guidelines. WARNING: To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it IMPORTANT: Failure to comply with the above required in an open position during installation.
  • Page 11 Fig. 9 - Typical Aquazone Complete C control wiring (single-phase unit) Start assist (when needed) N (Neutral) RED* BLU* Power supply Refer to data plate Use copper Earth (GRD) conductors only Compressor Capacitor L ( 3 ) YEL OR WHT M ( 2 ) H ( 1 ) See note 3...
  • Page 12 Fig. 10 - Typical Aquazone Complete C control wiring (three-phase unit) Earth (GRD) Ground lug Power supply N (Neutral) Refer to data plate Use copper conductors only Compr. Component location YEL OR See note 3 CB* TRANS (220V) See note 2 (240V) See note 7 BRN YEL...
  • Page 13 Fig. 11 - Typical Aquazone Deluxe D control wiring (single-phase unit) See note 8 Power distribution Start assist block (when needed) RED* BLU* Earth (GRD) Power supply Refer to data plate Use copper conductors only N (Neutral) Compressor See note 3 TRANS NO COM YEL OR WHT...
  • Page 14 Fig. 12 - Typical Aquazone Deluxe D control wiring (three-phase unit) Component location Earth (GRD) Ground lug Power supply N (Neutral) Refer to data plate Use copper Compr. conductors only YEL OR TRANS (220V) See note 8 (240V) See note 7 See note 7 Typical heat Fan enable...
  • Page 15 Table 3 - Electrical data 50RHE Power supply Voltage Compressor Total Min. circuit Max. V-ph-Hz min./max. motor unit current fuse/HACR 220/240-1-50 197/254 15.0 220/240-1-50 197/254 18.8 220/240-1-50 197/254 22.2 220/240-1-50 197/254 27.0 220/240-1-50 197/254 45.0 10.5 220/240-1-50 197/254 51.0 10.4 12.6 220/240-1-50 197/254...
  • Page 16 Fig. 14 - 50RHE blower speed selection 3.8.4 - PSC (permanent split capacitor) blower speed selection All water-source heat pumps are factory-set to deliver rated air Connect the blue wire to: CONNECT THE BLUE WIRE TO: H for high speed fan H FOR HIGH SPEED FAN flow at nominal static (37 Pa) on medium speed.
  • Page 17: Low Voltage Wiring

    3.9 - Low voltage wiring (see Fig. 15) Fig. 15 - Low voltage field wiring 3.9.1 - Thermostat connections Capacitor The thermostat should be wired directly to the Aquazone control board (see Figs. 9-12). Circuit breaker Ground 3.9.2 - Water freeze protection Contactor CC The Aquazone control allows the field selection of source fluid freeze protection points through jumpers.
  • Page 18: Pre-Start-Up

    4 - PRE-START-UP 5 - FIELD SELECTABLE INPUTS 4.1 - System checkout Jumpers and DIP (dual in-line package) switches on the control board are used to customise unit operation and can be configured When the installation is complete, follow the system checkout in the field.
  • Page 19: Deluxe D Control Dip Switches

    Alarm relay setting - Select jumper 4 (JW4-AL2 dry) for con- Boilerless changeover temperature: Switch 8 on S1 provides necting alarm relay terminal (AL2) to 24 VAC (R) or to remain selection of boilerless changeover temperature set point. Select as a dry contact (no connection). To connect AL2 to R, do not OFF for set point of 10°C or select ON for set point of 4.4°C.
  • Page 20: Water Valve (Slow Opening)

    6 - START-UP Cycle with compressor - In this configuration, the relay will be ON any time the compressor relay is on. Use the procedure outlined below to initiate proper unit start-up. Digital night setback (NSB) - In this configuration, the relay will be ON if the NSB input is connected to ground C.
  • Page 21: Scroll Compressor Rotation

    6.2 - Scroll compressor rotation 6.4 - Unit start-up heating mode It is important to be certain compressor is rotating in the proper NOTE: Operate the unit in heating cycle after checking the direction. To determine whether or not compressor is rotating in cooling cycle.
  • Page 22: Flushing

    Table 9 - Typical unit operating pressures and temperatures Entering Water Cooling Heating water flow Suction Discharge Super- Sub- Water temp. Air temp. Suction Discharge Super- Sub- Water temp. Air temp. temp. l/s per kW pressure pressure heat cooling rise drop pressure pressure...
  • Page 23: Anti-Freeze

    In areas where entering loop temperatures drop below 4.4°C or where piping will be routed through areas subject to freezing, maintained at 15.6 to 32.2°C. Carrier recommends using a closed circuit evaporative cooling tower with a secondary heat anti-freeze is needed.
  • Page 24: Operation

    7 - OPERATION relays are turned off and the control reverts to standby mode. If there is a master/slave or dual compressor application, all com- 7.1 - Power up mode pressor relays and related functions will operate per their asso- ciated DIP switch 2 setting on S1.
  • Page 25: System Test

    8 - SYSTEM TEST Table 14 - C control LED code and fault descriptions System testing provides the ability to check the control operation. LED code Fault Description The control enters a 20-minute test mode by momentarily shor- No fault in memory There has been no fault since the last power-down to power-up sequence ting the test pins (see Figs.
  • Page 26: Service

    Table 15 - Aquazone D control current LED status and alarm relay operations Description Status LED Test LED Fault LED Alarm relay (Green) (Yellow) (Red) Normal mode Flash last fault code in memory Open Normal mode with PM Flashing code 8 Cycle (closed 5 sec, open 25 sec, ...) D control is non-functional...
  • Page 27: Refrigerant System

    Pump Proper water treatment can minimise tube fouling and pitting. If support such conditions are anticipated, water treatment analysis is 25 mm recommended. Refer to the Carrier System Design Manual, pipe Condenser Part 5, for general water conditioning information. Tank CAUTION: Follow all safety codes.
  • Page 28: Refrigerant Charging

    10 - TROUBLESHOOTING Compare the subcooling temperature with the normal temperature listed in Table 9. If the measured liquid line (Figs. 20 and 21 and Table 16) temperature does not agree with the required liquid line temperature, ADD refrigerant to raise the temperature or When troubleshooting problems with a water-source heat pump, REMOVE refrigerant (using standard practices) to lower consider the following.
  • Page 29 Table 16 - Troubleshooting Fault Heating Cooling Possible cause Solution Main power problems Green status LED Off Check line voltage circuit breaker and disconnect. Check for line voltage between L1 and L2 on the contactor. Check for 24 V a.c. between R and C on controller. Check primary/secondary voltage on transformer.
  • Page 30 Table 16 - Troubleshooting (cont’d) Fault Heating Cooling Possible cause Solution Only compressor runs Thermostat wiring Check G wiring at heat pump. Jumper G and R for fan operation. Fan motor relay Jumper G and R for fan operation. Check for line voltage across BR contacts.
  • Page 31 Heating cycle analysis Dew point POINT °C Suction SUCTION coil COIL °C °C COMPRESSOR Compressor Heat Expansion EXPANSION COAX exchanger Discharge DISCHARGE VALVE valve °C Liquid line °C °C LIQUID LINE Water in Water out Look up pressure drop in Table 10 LOOK UP PRESSURE DROP IN TABLE 10 to determine flow rate TO DETERMINE FLOW RATE...
  • Page 32: Start-Up Checklist - 50Rhe R-407C Unit

    ________ °C Air in Air out Order No. 15764-20, 05.04; Supersedes order No. New Manufactured by: Carrier Corporation, Syracuse, USA. Manufacturer reserves the right to change any product specifications without notice. Printed on Totally Chlorine Free Paper. Printed in the Netherlands.

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