Multiaqua MAC-036HE Installation And Operation Manual
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Multiaqua MAC-036HE Installation And Operation Manual

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Summary of Contents for Multiaqua MAC-036HE

  • Page 1 Rev. 1.1...

  • Page 2: Table Of Contents

    Table of Contents Page Introduction System Description Electrical & Physical Data Description of Electrical Controls Chiller Controls Sequence of Operation System Faults Refrigeration System Operation Description of Refrigerant Components Description of Piping Components Layout & Design Banked Chiller Configuration Installation Notes 15-16 Propylene Glycol Mixture Chart Expansion Tanks...

  • Page 3: Introduction

    The Multiaqua Chiller System is not only unique in its application flexibility; it is unique in superior quality, rated capacities, and rugged durability. When installed in accordance with these instructions, the system will deliver years of trouble free service.

  • Page 4: System Description

    System Description The Multiaqua Chiller is a self-contained, air-cooled condenser, coupled with an insulated, brazed plate heat exchanger (evaporator). The system utilizes scroll compressors to circulate refrigerant between the condenser and heat exchanger. The refrigerant is metered into the heat exchanger with a thermostatic expansion valve.

  • Page 5: Electrical & Physical Data

    Contractors of America) Manual “J”. Refer to the appendix A-2:Multi-Zone Systems. ACCA’s Internet address is http://www.acca.org/ Due to load diversity, a Multiaqua Chiller can serve more total air handler tonnage than the actual total chiller capacity. For example, a 10 ton chiller may be delivering chilled liquid solution to 13 tons or more of air handler capacity.

  • Page 6: Electrical & Physical Data

    Electrical and Physical Data (Continued Upon receiving the chiller and components, inspect for any shipping damage. Claims for damage, either apparent or concealed, should be filed immediately with the shipping company. No liquid, other than the liquid solution mixture of water and Propylene Glycol, shall be used in the piping system and must be mixed in accordance with table 6 on page 16.

  • Page 7: Description Of Electrical Controls

    Description of Electrical Controls Control Transformer: The control transformer is rated at 24 vac, 40 va (1.6 amps @ 24vac). Pump Bypass Timer: The pump bypass timer is a 24 vac, 3- wire control. When energized the timer will bypass the flow switch for 10 seconds by creating a circuit to the pump relay, energizing the pump relay, and allowing the pump to operate long enough to close the flow switch.
  • Page 8 Description of Electrical Controls (Continued Low Pressure Switch: The low pressure switch is an automatic reset that senses compressor suction line pressure. In early production models, it opens at 40 PSIG and control closes at 80 PSIG. In the latest productions models, it opens at 10 PSIG and control closes at 25 PSIG.

  • Page 9: Chiller Controls Sequence Of Operation

    Chiller Controls Sequence of Operation When powered up, the Multiaqua chiller system energizes the control transformer creating 24 vac control voltage. First, the pump bypass timer is energized and temporarily bypasses the flow switch energizing the pump relay. In a properly filled and air purged system, the pump then starts to move liquid solution through the piping system.

  • Page 10: System Faults

    System Faults: Flow Switch Opening: The flow switch is normally closed during pump operation. Should liquid solution flow be interrupted for any reason, the flow switch will open shutting down and locking out the chiller operation. The only exception to this is when power is first applied to the chiller and the pump bypass timer bypasses the flow switch for 10 seconds.

  • Page 11: Description Of Refrigerant Components

    Description of Refrigerant Components Scroll Compressor: All Multiaqua chillers feature scroll compressors. Scroll technology ensures reliable, high performance at a low sound level over a wide range of operating conditions. Caution: The top half of the scroll compressor operates at a temperature high enough to cause burns and serious injury.

  • Page 12: Description Of Piping Components

    Description of Piping Components Supply Storage Tank: A supply storage tank must be used in a system with less than 50 gallons or 5 gallons per ton - whichever is greater-of liquid solution. The tank prevents rapid cycling of the compressors and acts as a reservoir for chilled liquid solution.

  • Page 13: Layout & Design

    Table 1 Chiller System Data MAC Series MAC-036HE / 048HE / 60HE Min. Liquid Solution Flow Rate 5.5 / 6.5 / 9.0 Max. Liquid Solution Flow Rate 8.6 / 11.5 / 14.4 Min.

  • Page 14: Banked Chiller Configuration

    Banked Chiller Configuration Installing Multiaqua chillers in parallel is recommended. Piping chillers in series is not recommended. Page 14 of 28...

  • Page 15: Installation Notes

    Installation Notes: Piping such as PEX, steel, copper, or PVC can be used with the Multiaqua system. Check local building codes for material conformation. Care must be taken when using PVC as the presence of propylene glycol may destroy plastics. Pressure drop data for the selected piping material is readily available and should be used.

  • Page 16: Propylene Glycol Mixture Chart

    Propylene Glycol. To determine the Propylene Glycol content for various ambient temperatures, refer to Table 6. In no instance should a Multiaqua chiller be installed with less than 10% Propylene Glycol content in the piping system. Using less than the recommended Propylene Glycol percentage content voids equipment warranty.

  • Page 17: Expansion Tanks

    Liquid solution expansion and contraction within the closed system must be compensated for with an expansion tank. The expansion tank used with the Multiaqua system is a steel tank with a rubber bladder internally attached. There is air pressure on one side of the rubber bladder that keeps the bladder pushed against the sides of the tank before the system is filled with liquid solution (illustration above).

  • Page 18: Air Elimination

    Air Elimination Once the system is filled, any air left in the system must be eliminated. Briefly open each bleed valve at the air handler(s) and allow trapped air to escape. This will eliminate much of the air left in the system. A field installed air bleed port at the highest point in the piping is recommended to speed up the air elimination process.

  • Page 19: Wiring Diagrams

    MAC-36HE, -048HE, -060HE-1 Ladder Wiring Diagram 208/230-1-50/60 Page 19 of 28...
  • Page 20 MAC-36HE, -048HE, -060HE-1-L Ladder Wiring Diagram With Low Ambient Kit 208/230-1-50/60 Page 20 of 28...
  • Page 21 MAC-36HE, -048HE, -060HE-2 Ladder Wiring Diagram 208/230-3-50/60 Page 21 of 28...
  • Page 22 MAC-36HE, -048HE, -060HE-2-L Ladder Wiring Diagram With Low Ambient Kit 208/230-3-50/60 Page 22 of 28...
  • Page 23 MAC-36HE, -048HE, -060HE-3 Ladder Wiring Diagram 380/460-3-50/60 Page 23 of 28...

  • Page 24: Wiring Diagrams

    MAC-36HE, -048HE, -060HE-3-L Ladder Wiring Diagram With Low Ambient Kit 380/460-3-50/60 Page 24 of 28...

  • Page 25: Product Specifications

    Notes: Page 26 of 28...
  • Page 26 306 Hagood Street Easley, SC 29640 Ph: 864-850-8990 Fax: 864-850-8995 www.multiaqua.com For Technical Assistance: 1-855-THNK-WTR (1-855-846-5987)

This manual is also suitable for:

Mac-048heMac-060he

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