Stand-Alone Water-Cooled ProcessChillers

Transcription

1 Stand-Alone Water-Cooled ProcessChillers Product Data Catalog Single Compressor: MSP011X, MSP015X, MSP021X, MSP031X, MSP041X Dual Compressor: MSP032X, MSP042X, MSP052X, MSP062X, MSP066X, MSP072X, MSP082X

2 General Information Multistack MSP Process Chillers Multistack, inventor and world leader in modular chiller systems, introduces the MSP line of efficient, reliable and innovative industrial process chillers available in ten through 80 tons of capacity. MSP chillers meet a wide range of process cooling needs including plastics and general industrial applications. Include one or two optimized scroll compressors for standard water-to-water conditions. Shell-and-tube condensers and corrosion-resistant stainless steel brazed-plate evaporators. Shell-and-tube evaporator optional. Ten through 80 ton capacities in standalone, non-modular configurations. Compact, space-efficient design maximizes valuable floor space. Native building automation protocols: Modbus IP and Modbus RTU with options for BACnet IP, BACnet MSTP, Metasys N2, or LonWorks through additional factoryinstalled hardware. Variable speed scroll compressors available in some sizes for maximum part load efficiency. Available in all stainless steel construction, stainless steel hardware, and epoxy paints. Easy Installation Accessible single-point electrical connection and grooved water connections. Factory run test documents performance and establishes baseline for start up and commissioning. Simple Operation Intuitive keypad provides control of unit operation. English display with easy to understand abbreviations. 128 x 64 pixel STN monochrome graphics LCD with 2.8-inch diagonal viewing area. Easy interface with customer-supplied computer terminal. Highly Dependable ETL Listed in accordance with UL 1995 standards. Electronic controls for precise process temperature control. Available with dual refrigeration circuits for redundancy. Cost-effective, reliable thermal dispersion flow switches for proof-of-flow available. Simple to Service All components easily accessible for maintenance and service. Automatically records fault conditions with sensor information at time of fault. Industry standard components with many common manufacturers off-the-shelf parts. Smaller control panel components mounted on DIN rail for easy replacement if needed. Warranty and Start-up 12 Months parts Factory-authorized start-up assistance For more information contact your nearest Multistack sales representative. Go to: Table of Contents General Information Model Number Nomenclature Electrical Data Controls and Customer Connections...29 Water Piping Requirements Mechanical Specifications

3 General Information General Data - MSP Single Compressor Units MSP011X MSP015X MSP021X MSP031X MSP041X Compressor Type Scroll Scroll Scroll Scroll Scroll Dry Weight (lbs. each) Normal Capacity (tons each) Quantity Evaporator Brazed Plate Brazed Plate Brazed Plate Brazed Plate Brazed Plate Weight (lbs. each) Water Storage (gallons each) Circuit Configuration Single Single Single Single Single Condenser Shell & Tube Shell & Tube Shell & Tube Shell & Tube Shell & Tube Weight (lbs. each) Water Storage (gal. each) Circuit Configuration Single Single Single Single Single Refrigerant Type R-410A R-410A R-410A R-410A R-410A Charge (lbs./circuit) Number of Circuits Operating Weight (lbs.) Shipping Weight (lbs.) *Data applies to R-410A refrigerant. General Data - MSP Dual Compressor Units MSP032X MSP042X MSP052X MSP062X MSP066X MSP072X MSP082X Compressor Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Dry Weight (lbs. each) / / Normal Capacity (tons each) Quantity Evaporator (Brazed Plate) Brazed Plate Brazed Plate Brazed Plate Brazed Plate Brazed Plate Brazed Plate Brazed Plate Weight (lbs. each) Water Storage (gallons each) Circuit Configuration Dual Dual Dual Dual Dual Dual Dual Condenser Shell & Tube Shell & Tube Shell & Tube Shell & Tube Shell & Tube Shell & Tube Shell & Tube Weight (lbs. each) Water Storage (gal. each) Circuit Configuration Dual Dual Dual Dual Dual Dual Dual Refrigerant Type R-410A R-410A R-410A R-410A R-410A R-410A R-410A Charge (lbs./circuit) Number of Circuits Operating Weight (lbs.) Shipping Weight (lbs.) Multistack has a policy of continual improvement and reserves the right to change product design, literature and specifications without notice. 3

4 Model Number Nomenclature MSP Multistack Process Chiller Capacity (Tons) 011, 015, 021, 031, 032, 041, 042, 052, 062, 066, 072, 082 Compressor D-Copeland Digital Scroll ZP, Q- Quasi VFD Copeland ZP, V- Trane VFD Copeland ZP, X- Copeland Scroll ZP - None + Other Voltage/Phase/Frequency A- 208/3/60 C- 575/3/60 D- 200/3/50 E- 380/3/50 F- 380/3/60 H- 460/3/60 I- 400/3/50 J- 415/3/50 L- 230/3/60 + Other Frame Size/OSHPD E- 28 /No F- 28 /Yes G- 32 /No H- 32 /Yes I- 34 /No J- 34 /Yes + Other Configuration/Module Type A- Standard/Single B- Standard/Multiple C- Standard Conduit Raceway/Single + Other Evaporator/ASME/Type System A- Brazed 316/No ASME/DX B- Brazed 316/Yes ASME/DX C- Brazed SMO/No ASME/DX D- Brazed SMO/Yes ASME/DX M- S&T Std/Yes/DX P- S&T Custom/Yes/DX - None + Other Condenser/ASME A- Brazed 316/No ASME B- Brazed 316/Yes ASME C- Brazed SMO/No ASME D- Brazed SMO/Yes ASME E- Remote F- S&T Std/Yes G- S&T Custom/Yes H- Double Wall - None + Other Refrigeration Option 1 A- Rotolocks B- Gauges C- Relief Valves D- HGBP E- Rotolocks/Gauges F- Rotolocks/Relief Valves G- Rotolocks/HGBP H- Gauges/Relief Valves I- Gauges/HGBP J- Relief Valves/HGBP K- Rotolocks/Gauges/Relief Valves L-Rotolocks/Gauges/ HGBP M- Rotolocks/Relief Valves/HGBP N- Gauges/Relief Valves/HGBP O- Rotolocks/Gauges/Relief Valves/HGBP - None Refrigeration Option 2 A- Desuperheater stub-outs, B- Compressor Wraps, C- Refrigerant Isolation Valves, D- Desuperheater Stub-outs/Compressor Wraps, E- Desuperheater Stub-outs/Refrigerant Isolation Valves, F- Compressor Wraps/Refrigerant Isolation Valves, G- Desuperheater Stub-outs/Compressor Wraps/Refrigerant Isolation Valves, None Insulation - Evaporator/Condenser A- 3/4 /None, B- 3/4 /3/4, C- 3/4 /1-1/2, D- 1-1/2 /None, E- 1-1/2 /3/4, F- 1-1/2 /1-1/2, + Other Evaporator Headers/Size/Materials M- Other/Carbon Steel/Carbon, N- Other/304 SS/Carbon, Y- Other/304 SS/304 SS, - None Chilled Water Valves/Material/Flushports A- 2-Way Modulating/Carbon/No, B- 2-Way Modulating/SS/No, C- 2-Way Modulating & Iso Valve/Carbon/No, D- 2-Way Modulating & Iso Valve/Carbon/Yes, E- 2-Way Modulating & Iso Valve/SS/No, F- 2-way Modulating Valve & Iso Valve/SS/Yes, G- 2-Way Open-Close/Carbon/No, H- 2-Way Open-Close/SS/No, I- 2-Way Open-Close & Iso Valve/Carbon/No, J- 2-Way Open- Close & Iso Valve/Carbon/Yes, K- 2-Way Open-Close & Iso Valve/SS/No, L- 2-Way Open-Close & Iso Valve/SS/Yes, M- Two (2) Manual Iso Valves/Carbon/No, N- Two (2) Manual Iso Valves/ Carbon/Yes, O- Two (2) Manual Iso Valves/SS/No, P- Two (2) Manual Iso Valves/SS/Yes, Q- 3-Way Modulating Valve/Carbon/No, R- 3-Way Modulating Valve/SS/No, S- 3-Way Open-Close & Iso Valve/Carbon/No, T- 3-Way Open-Close & Iso Valve/Carbon/Yes, U- 3-Way Open-Close & Iso Valve/SS/No, V- 3-Way Open-Close & Iso Valve/SS/Yes, - None, + Other Condenser Headers/Size/Materials N/A Note: Not all options listed in this model number nomenclature are available with all unit sizes or in combination with other options. Consult with your Multistack sales representative. Multistack has a policy of continual improvement and reserves the right to change product design, literature and specifications without notice. 4

5 Multistack MSP Chillers Model Number Nomenclature Reserved Refrigerant/No. of Circuits A- 410A/1, B- 410A/2, N- Other/1, O- Other/2, P- None/1, Q- None/2, - None, + Other Pump Horsepower M- Other/Single N- Other/Primary-Standby - None + Other Application A- Standard B- Ice Making C- Low Temperature D- Super Low Temperature Controller/Master Location/Fail to Run Mode (FRM) E- MCS No. of Compressor VFDs/Line Reactor/Heat Tracing 1/VFD No Line React./None, B- 1/VFD No Line React./Heat Trave Evap Only, C- 1/VFD No Line React./Heat Trace Cond Only, D- 1/VFD No Line React./Heat Trace Both, E- 1/VFD & Line React./None, F- 1/VFD & Line React./Heat Trace Evap Only, G- 1/VFD & Line React./Heat Trace Cond Only, H- 1/VFD & Line React./Both, I- 2/VFD No Line React./Heat Trace Evap Only, J- 2/VFD No Line React./Heat Trace Evap Only, K- 2/VFD No Line React./Heat Trace Cond Only, L- 2/VFD No Line React./Heat Trace Both, M- 2/VFD & Line Reat./None, N- 2/VFD & Line React./Heat Trace Evap Only, O- 2/VFD & Line React./Heat Trace Cond Only, P- 2/VFD & Line React./Heat Trace Both, Q- None/ Heat Trace Evap Only, R- None/Heat Trace Cond Only, S- None/Heat Trace Both, - None, + Other Flow Switch/Power Phase Monitor (PPM) A- Evap-Load Thermal Flow Switch/No PPM, B- Evap-Load Thermal Flow Switch/Yes PPM, C- Evap-Load IFM Flow Meter/No PPM, D- Evap-Load IFM Flow Meter/Yes PPM, M- Evap Flow Switch/Cond Flow Meter/No PPM, N- Evap Flow Switch/Cond Flow Meter/Yes PPM, O- Evap Flow Meter/Cond Flow Switch/No PPM, P- Evap Flow Meter/Cond Flow Switch/Yes PPM, - None SCCR/Power Factor Capacitor A- Std/No, B- Std/Yes, C- 10/No, D- 10/Yes, E- 18/No, F- 18/Yes, G- 22/No, H- 22/Yes, I- 25/No, J- 25/Yes, K- 35/No, L- 35/No, M-50/No, N- 50/Yes, O- 65/No, P- 65/Yes, Q- 85/No, R- 85/Yes, S- 100/No, T- 100/Yes, + Other Panel NEMA Rating/Actuator NEMA Rating A- Std/No, B- Std/2, C- Std/4, D- 3R/No, E- 3R/2, F- 3R/4, G- Other/No, H- Other/2, I- Other/4, + Other Water Side Options A- Pressure Taps-Evap/No, B- Pressure Taps-Evap/Yes Evap, C- Pressure Taps-Evap/Yes Cond, D- Pressure Taps-Evap/Yes Both, E- Pressure Taps-Cond/No, F- Pressure Taps-Cond/Yes Evap, G- Pressure Taps-Cond/Yes Cond, H- Pressure Taps-Cond/Yes Both, I- Pressure Taps-Both/No, J- Pressure Taps-Both/Yes Evap, K- Pressure Taps-Both/Yes Cond, L- Pressure Taps-Both/Yes Both, M- No/Yes Evap, N- No/Yes Cond, O- No/Yes Both, - None Hot Water Valves/Material/Flushports A- 2-Way Modulating/Cabon/No, B- 2-Way Modulating/SS/No, C- 2-Way Modulating & Iso Valve/Carbon/No, D- 2-Way Modulating & Iso Valve/Carbon/Yes, E- 2-Way Modulating & Iso Valve/SS/No, F- 2-Way Modulating & Iso Valve/SS/Yes, G- 2-Way Open-Close/Carbon/No, H- 2-Way Open-Close/SS/No, I- 2-Way Open-Close & Iso Valve/Carbon/No, J- 2-Way Open-Close & Iso Valve/Carbon/ Yes, K- 2-Way Open-Close & Iso Valve/SS/No, L- 2-Way Open-Close & Iso Valve/SS/Yes, M- Two (2) Manual Iso Valves/Carbon/No, N- Two (2) Manual Iso Valves/Carbon/Yes, O- Two (2) Manual Iso Valves/SS/No, P- Two (2) Manual Iso Valves/SS/Yes, Q- 3-Way Modulating Valve/Carbon/No, R- 3-Way Modulating Valve/SS/No, S- #-Way Open-Close & Iso Valve/Carbon/No, T- 3-Way Open-Close & Iso Valve/Carbon/Yes, U- 3-Way Open-Close & Iso Valve/SS/No, V- 3-Way Open-Close & Iso Valve/SS/Yes, - None, + Other 5

6 MSP011X, All Voltages 6

7 MSP015X, All Voltages Multistack MSP Chillers 7

8 MSP021X, All Voltages 8

9 MSP031X, Volts Multistack MSP Chillers 9

10 MSP031X, Volts 10

11 MSP041X, Volts Multistack MSP Chillers 11

12 MSP041X, Volts 12

13 MSP032X, Volts Multistack MSP Chillers 7-15/16 13

14 MSP032X, Volts 14

15 MSP042X, Volts Multistack MSP Chillers 15

16 MSP042X, Volts 16

17 MSP052X, Volts Multistack MSP Chillers 17

18 MSP052X, Volts 18

19 MSP062X, Volts Multistack MSP Chillers 19

20 MSP062X, Volts 20

21 MSP066X, Volts Multistack MSP Chillers 21

22 MSP066X, Volts 22

23 MSP072X, Volts 23

24 MSP072X, Volts 24

25 MSP082X, Volts Multistack MSP Chillers 25

26 MSP082X, Volts 26

27 Electrical Data Electrical Rating - MSP Single Compressor Units (Across the Line Compressors Only) Model Voltage Compressor RLA Compressor LRA Compressor MCC Unit MCA Unit MOP (Amps) MSP011XA 208/3/ MSP011XL 230/3/ MSP011XH 460/3/ MSP011XC 575/3/ MSP015XA 208/3/ MSP015XL 230/3/ MSP015XH 460/3/ MSP015XC 575/3/ MSP021XA 208/3/ MSP021XL 230/3/ MSP021XH 460/3/ MSP021XC 575/3/ MSP031XA 208/3/ MSP031XL 230/3/ MSP031XH 460/3/ MSP031XC 575/3/ MSP041XA 208/3/ MSP041XL 230/3/ MSP041XH 460/3/ MSP041XC 575/3/ MCA/MOP Calculation Single Compressor Units: MCA = (1.25 x RLA; MOP = (1.75 x RLA) Round to next smaller fuse/circuit breaker size on all MOP calculations. Dual Compressor Units: MCA = (1.25 x Largest Compressor RLA) + RLA of Second Compressor. MOP = (2.25 x Largest Compressor RLA) + RLA of Second Compressor. Round to the next smaller fuse/circuit breaker size on all MOP calculations. RLA = Rated Load Amps LRA = Locked Rotor Amps MCA =Minimum Circuit Ampacity MOP = Maximum Overcurrent Protection MCC = Maximum Continuous Current 27

28 Electrical Data Electrical Rating - MSP Single & Dual Compressor Units (Across-the-Line Compressors Only) Model Voltage Compressor(s) RLA Compressor(s) LRA Compressor(s) MCC Unit MCA Unit MOP (Amps) MSP032XA 208/3/ MSP032XL 230/3/ MSP032XH 460/3/ MSP032XC 575/3/ MSP042XA 208/3/ MSP042XL 230/3/ MSP042XH 460/3/ MSP042XC 575/3/ MSP052XA 208/3/ MSP052XL 230/3/ MSP052XH 460/3/ MSP052XC 575/3/ MSP062XA 208/3/ MSP062XL 230/3/60 MSP062XH 460/3/60 MSP062XC 575/3/ MSP066XA 208/3/ MSP066XL 230/3/ MSP066XH 460/3/ MSP066XC 575/3/ MSP072XA 208/3/60 MSP072XL 230/3/60 MSP072XH 460/3/60 MSP072XC 575/3/ MSP082XA 208/3/ MSP082XL 230/3/ MSP082XH 460/3/ MSP082XC 575/3/

29 Multistack MSP Chillers Controls and Customer Connections Multistack MSP chillers use the Micro Control Systems Magnum controller. The Magnum controller provides flexibility with setpoints and control options that can be selected prior to commissioning a system or when the unit is live and functioning. Displays, alarms and other interfaces are accomplished in clear, simple language to indicate controller and chiller status. The MCS controller includes a master control board, a keypad and display. Complementing the Magnum micro controller is the MCS-SI16-AO4 expansion board. Communication with these units is at 38,400 baud over the dedicated MCS-I/O port. An RS-485 port is also provided for communication with Building Management Systems (BMS). Native building automation protocols are Modbus IP and Modbus RTU with options for BACnet IP, BACnet MSTP, Metasys N2 or LonWorks through additional factory installed hardware. Customer connection points for the chiller controller. Digital Inputs (Dry contact required; controller supplies +5V) Remote Start/Stop CHW (Chilled Water) Flow Switch CW (Condenser Water) Flow Switch A closed contact indicates enable or proof of flow Analog Inputs CHW (Chilled Water) Reset Signal 0-5VDC input required Relay Outputs (Dry contact provided) Run Status CW (Condenser Water) Pump Enable Chiller Warning Chiller Alarm Customer can supply up to 230VAC; protected by built-in fusing. Controller circuit board and status screen. Left, BAS interface for: BACnet IP BACnet MSTP Metasys N2 LonWorks 29

30 Chilled and Condenser Water Piping Evaporator/Chilled Water Piping MULTISTACK CHILLER PRESSURE TAPS Supplied, installed by Multistack 1/2 SENSOR POCKETS Installation of sensor pocket (weld-a let) is recommended at 30 from end of chiller, supplied by Multistack and installed by others STANDARD Y STRAINER Supplied and installed by others. *Note: select strainer based on water quality CHILLED WATER PUMP Supplied, installed by others STRAINER ISOLATION VALVE Supplied and installed by others FROM COOLING LOAD TO COOLING LOAD FLOW SWITCH Supplied, installed by others CHILLER ISOLATION VALVES Supplied, installed by others Condenser Piping (With Head Pressure Control) MULTISTACK CHILLER 1/2 SENSOR POCKETS Installation of sensor pocket (weld-a-let) is recommended at 30 from end of chiller. Supplied by Multistack, installed by others PRESSURE TAPS Supplied, installed by Multistack FLOW SWITCH Supplied, installed by others CONDENSER ISOLATION VALVES Supplied and installed by others. TO COOLING TOWER STANDARD Y STRAINER Supplied, installed by others. Note: select strainer mesh based on water quality. CONDENSER WATER PUMP Supplied, installed by others. STRAINER ISOLATION VALVE Supplied, installed by others. 3-WAY CONDENSER BY-PASS VALVE Supplied, installed in building by others. FROM COOLING TOWER 30

31 Water Requirements, Low Temperature Operation Water Specifications Multistack recommends working with a qualified water treatment professional familiar with the Langelier and Ryznar indexes. These indexes account for the variables that affect water quality and are used to help determine if water will tend to be scale forming, neutral, or corrosive. The following values are acceptable for Multistack brazed plate and shell and tube heat exchangers: Water Specifications Water Specifications with 25% Glycol ph: >7 and <9 ph: >7 and <9 Total Dissolved Solids (TDS): Less than 1000 ppm Total Dissolved Solids (TDS): ,000 ppm Hardness as CaCO 3 : 30 to 500 ppm Conductivity: ,000 ppm Alkalinity as CaCO 3 : 0 to 500 ppm Hardness as CaCO 3 : 30 to 500 ppm Chlorides: < 200 ppm Alkalinity as CaCO 3 : >500 ppm Sulfates: < 200 ppm Chlorides: < 200 ppm Sulfates: < 200 ppm If the condenser water loop is open, contaminants including debris, trash, mud, algae, sand, and scale can accumulate in the condenser causing restrictions, erosion or corrosion. Multistack cannot be responsible for heat exchangers damaged due to untreated/poorly treated water. Multistack does not recommend the use of acid to remove scale from heat exchangers. If acid is used to de-scale a heat exchanger, the heat exchanger must be properly flushed then tested for proper ph levels before returning to normal operation. Heat exchangers damaged due to improper acid cleaning are not covered under warranty. In harsh environments where lake, river or well water is used for condenser cooling, special precautions should be taken as these environments can affect condenser tube and head material. Multistack offers optional epoxy coating for tube sheets and heads. Glycol Solution Information Low Temperature Operation with Glycol In chilled water systems where water temperatures of less than 40 F and ambient temperatures of 32 F are likely to occur, it is necessary to add a glycol-based heat transfer fluid to the system. Both ethylene and propylene glycol offer the same basic freeze and corrosion protection although there are performance differences in the solutions. Note: 1. Ethylene and propylene glycol ratings are outside the scope of AHRI Standard 550/590 Certifications. 2. The effect of glycol in the condenser is negligible as it tends to mirror the properties of water as its temperature increases. No emphasis on derate on condenser capacity with glycol is necessary in the selection process. Ethylene Glycol Ethylene % Freeze Point F C Capacity Power Flow Pressure Drop Propylene Glycol Propylene % Freeze Point F C Capacity Power Flow Pressure Drop

32 Mechanical Specifications Multistack MSP Chiller 2.01 Operating Conditions A. Provide water-cooled liquid chiller with capacity as scheduled on drawings at job site elevation listed in Section B. Chiller shall be designed to operate using R-410A refrigerant. C. The liquid to be chilled will be water containing corrosion inhibitors. D. Chiller shall be designed to operate using volt, 3 phase, 60 [50] Hz electrical power Water-Cooled Packaged Chiller A. Approved manufacturer is Multistack. B. System Description: Chiller shall incorporate scroll-type compressors, brazed plate evaporator (Optional: shell-and-tube evaporator), and shell-and-tube condenser. Each refrigerant circuit shall consist of an individual compressor, shell-and-tube condenser, brazed plate evaporator, electronic expansion valve and control system. If dual circuited, each circuit shall be constructed to be independent of other circuits from a refrigeration and electrical stand-point, and able to produce chilled water even in the event of a failure of one refrigerant circuit. Circuits shall not contain more than (XX) lb. of R-410A refrigerant. C. General 1. Chiller Modules shall be ETL listed in accordance with UL Standard 1995, CSA certified per Standard C22.2# Chiller shall be AHRI certified. 3. Chiller shall ship wired and charged with refrigerant. Chiller shall be factory run tested prior to shipment on an AHRI-certified or third party verified test stand. 4. Compressors, heat exchangers, piping and controls shall be mounted on a heavy gauge, powder coated frame. Electrical controls, contactors, and relays for each chiller shall be mounted within that chiller. D. Evaporator shall be brazed plate heat exchanger constructed of 316 stainless steel; designed, tested and stamped in accordance with UL 1995 code for 650 psig refrigerant side working pressure and 360 psig water side working pressure. (Optional: The evaporator shall be shell- and-tube construction designed, tested, and stamped in accordance with UL 1995 code.) External surface shall be covered with ¾-inch flexible, closed-cell insulation. Water nozzles shall be provided with grooves for field-provided mechanical couplings. E. The condenser shall be shell-and-tube construction designed, tested and stamped in accordance with UL 1995 code for 600 psig refrigerant side working pressure and 150 psig water side working pressure with removable, epoxy-coated water plates to facilitate cleaning. Tube sheets will be epoxy coated to prevent pitting caused by galvanic action. Water nozzles shall be provided with grooves for field-provided mechanical couplings. F. Option: Variable Flow Operation - Chilled and/or condenser water butterfly type isolation valves shall incorporate appropriate accessories and controls to allow the chiller to operate efficiently in a variable primary flow system. Valve shall modulate via a motorized actuator for leaving water temperature control, chiller minimum flow bypass, chiller no load bypass, or head pressure control. Compressor staging based on return water temperature is not acceptable for temperature control. Motorized actuators shall be modulating NEMA 2, IP-54 with a stroke time of no more than 35 seconds. (Optional: NEMA 4X rated valves with easily visible position indicators and internal thermal motor overload protection. Valves shall be fast acting type with a maximum stroke time, full closed to full open, of 15 seconds.) G. Compressor: Each chiller shall contain one or two hermetic scroll compressors independently circuited and mounted to the module with rubber-in-shear isolators. Each system shall include high discharge pressure and low suction pressure manual reset safety cut-outs. H. Control System. 1. Compressor scheduling shall be performed by a microprocessor-based control system. The lead compressor shall be selectable. Controller shall be capable of either auto-rotation or rotation based on least amount of run time becoming the lead compressor. 2. Controller shall monitor and report the following on each refrigeration system: a. Discharge Pressure i. High Discharge Pressure Fault ii. Low Discharge Pressure Fault iii. Discharge Pressure Safety Lockout b. Suction Pressure i. Low Suction Pressure Fault ii. Unsafe Suction Pressure Lockout c. Suction Temperature d. Low Differential Pressure Lockout e. Compressor Winding Temperature f. Calculated Superheat 3. The controller shall be powered by the chiller s single point power connection and shall monitor and report the following system parameters: a. System Run / Stop Command b. Power Phase Monitor Status c. Evaporator Water Entering and Leaving Temperature d. Condenser Water Entering and Leaving Temperature e. Chilled Water and Condenser Water Flow Status (optional) f. Chilled Water and Condenser Water Valve Status (optional) g. Chilled Water Reset Signal 4. An out of tolerance indication from these controls or sensors shall cause a fault indication at the controller and will shut off that compressor, transferring load requirements to the next available compressor, if it s a multiple compressor chiller. In the case of a System Fault the entire chiller will be shut down. When a fault occurs the controller shall record conditions at the time of the fault and store the data for recall. This information shall be capable of being recalled through the controller keypad and displayed on the 128 x 64 dot pixel STN monochrome graphics LCD with 2.8-inch diagonal viewing area. A history of faults shall be maintained including date and time of day of each fault. 5. Individual monitoring of leaving chilled water temperatures from each refrigeration system shall be programmed to protect against freeze-up. 6. The control system shall monitor entering and leaving chilled water temperatures to determine system load and select the number of compressor circuits required to operate. Response times and set points shall be adjustable. The system shall provide for variable time between compressor sequencing and temperature sensing so as to fine tune the chiller to changing building conditions. 7. Option: Building Interface The chiller shall be capable of interfacing to a building automation system. Native protocols include Modbus IP and Modbus RTU. Additional hardware can be installed to include BACnet IP, BACnet MSTP, Metasys N2, or LonWorks. I. Chiller shall have a single point power connection and external inputs and outputs compatible with the building management system. Inputs/Outputs include: 1. Remote Run/Stop 2. Alarm Relay 3. Warning Relay 4. Chilled Water Reset 5. ECW to Mechanical Cooling Module 6. LCW from Mechanical Cooling Module 7. ECHW to Mechanical Cooling Module 8. LCHW from Mechanical Cooling Module 9. Power Phase Monitor 10. Chilled Water Flow Switch Input 11. Condenser Water Flow Switch Input 12. Condenser Pump Relay 13. Run Status Relay N. Option: IFM Flow Switch Per Module. Integral to each module and powered by the module for individual module proof of flow and flow safety. Modules without independent IFM switches per module are not acceptable alternates SAFETIES, CONTROLS AND OPERATION A. Chiller safety controls system shall be provided with the unit (minimum) as follows: 1. Low evaporator refrigerant pressure 2. Loss of flow through the evaporator 3. Loss of flow through the condenser 32

33 Mechanical Specifications 4. High condenser refrigerant pressure 5. High compressor motor temperature 6. Low suction gas temperature 7. Low leaving evaporator water temperature B. Failure of chiller to start or chiller shutdown due to any of the above safety cutouts shall be annunciated by display of the appropriate diagnostic description at the unit control panel. This annunciation will be in plain English. Alphanumeric codes shall be unacceptable. C. The chiller shall be furnished with a controller integral to the chiller control circuitry to provide these functions: 1. Provide automatic chiller shutdown when load decreases below chiller normal operating requirements. Upon an increase in load, the chiller shall automatically restart. 2. Provisions for connection to automatically enable the chiller from a remote energy management system. 3. The control panel shall provide alphanumeric display showing all system parameters in English language with numeric data in English units. D. Normal Chiller Operation 1. When chiller is enabled, the factory supplied controller stages the chiller capacity from minimum to maximum as required by building load. 2. The chiller control system shall respond to entering water temperature (constant primary flow) or to leaving water temperature (variable primary flow) and will have an integral reset based on entering water temperature to provide efficient operation at part-load conditions. E. Power Phase Monitor 1. Provide a power phase monitor on the incoming power supply to the chiller to prevent chiller operation when incoming power is unsuitable for proper operation. 2. The power phase monitor shall provide protection against these conditions: a. Low Voltage brown-out b. Incorrect phase rotation c. Loss of phase d. Phase imbalance PART 3 INSTALLATION 3.01 PIPING SYSTEM FLUSHING PROCEDURE A. Before connecting chiller to condenser and chilled water loops, the piping loops shall be flushed with a detergent and hot water ( F) mixture to remove any dirt or organics. In old systems with heavy encrustation of inorganic materials consult a water treatment specialist for proper passivation and/or removal of these contaminants. B. While flushing a 30 mesh (max.) Y-strainer (or acceptable equivalent) shall be in place in the system piping and examined periodically as necessary to remove collected residue. The use of on board chiller strainers shall not be acceptable. The flushing process shall take no less than six hours or until the strainers are clean. Old systems with heavy encrustation shall be flushed for a minimum of 24 hours and may take as long as 48 hours before the filters run clean. Detergent and acid concentrations shall be used in strict accordance with the respective chemical manufacturer s instructions. After flushing with the detergent and/or dilute acid concentrations the system loop shall be purged with clean water for at least one hour to ensure that all residual cleaning chemicals have been flushed out. C. Before supplying water to the chiller consult the Water Treatment Specification water quality requirements during chiller operation. The appropriate chiller manufacturer s service literature shall be available to the operator and/or service contractor and consulted for guidelines concerning preventative maintenance and off-season shutdown procedures Water Treatment Requirements A. Supply water for both the chilled water and condenser water circuits shall be analyzed and treated by a professional water treatment specialist who is familiar with the operating conditions and materials of construction specified for the chiller s heat exchangers, headers and associated piping. Cycles of concentration shall be controlled such that recirculated water quality for modular chillers using 316 stainless steel brazed plate heat exchangers and carbon steel headers is maintained within the following parameters: 1. ph Greater than 7 and less than 9 2. Total Dissolved Solids (TDS) Less than 1000 ppm 3. Hardness as CaCO 3 30 to 500 ppm 4. Alkalinity as CaCO 3 30 to 500 ppm 5. Chlorides Less than 200 ppm 6. Sulfates Less than 200 ppm 3.03 Warranty and Start-Up A. Manufacturer s Warranty: Manufacturer shall provide full parts-only warranty coverage for entire chiller for a period of one year. All parts shall be warranted against defects in material and workmanship. Similar parts-only coverage shall be provided for the chillers compressors for a period of five years. The warranty period shall commence either on the equipment start-up date or six months after shipment, whichever is earlier. B. Manufacturer shall provide the services of a factory authorized service engineer to provide complete start-up supervision and shall also be responsible for assembly of the chillers cabinetry package and electrical bus bar system. After start-up a manufacturer s representative shall provide a minimum of eight hours of operator training to the owner s designated representative(s). Multistack has a policy of continual improvement and reserves the right to change product design, literature and specifications without notice. 33

34 Originators Multistack invented the modular water chiller. It started with a radically simple idea: chiller modules that could be brought into the equipment room one at a time, through standard doorways and down elevators, to form a fully integrated chiller system. The idea launched a revolution and transformed Multistack into a leader in the commercial water-chiller industry. Innovators Multistack perfected the modular chiller and leads the industry in innovative and environmentally friendly modular solutions. Since founding in the late 1980s, Multistack has engineered, manufactured, and distributed an impressive array of modular air conditioning firsts: the first on-board strainer, the first modular automatic blow-down device, the first modular chiller for variable flow, the first modular chiller-heater (heat pump), the first modular heat-recovery chiller, the first modular air-to-water heat pump, the first modular chiller to utilize MagLev compressor technology, and the first modular chiller to utilize R-410A. Never the Imitators Multistack sets the standard in the industry for superior customer service, fast and on time shipment, superior product quality, and new product development. Our pioneering leadership in environmental issues is well documented. If you want the best, be sure to specify the original Multistack Maple Avenue P.O. Box 510 Sparta, WI Phone info@multistack.com MSP-CAT-001_0416 New FWB 34