SINGLE SCREW AIR COOLED CHILLER-HEAT RECOVERY

Transcription

1 MHS-F HR-2011 SINGLE SCREW AIR COOLED CHILLER-HEAT RECOVERY MODEL: MCS FSP MHS FSP MHS FSR COOLING CAPACITY: 164KW-1370KW HEATING CAPACITY: 172KW-1439KW PARTIAL HEAT RECOVERY: 41kW-343kW TOTAL HEAT RECOVERY: 197KW-1008KW REFRIGERANT: R22, R407C

2 Overview Air cooled chilled hot water unit is a kind of central air-conditioning unit with air as the cooling (heating) source and water as the heat carrier. For the traditional air cooled heat pump unit, a large amount of condensing heat is generated during refrigeration and is discharged into the atmosphere, which not only leads to a waste of much energy but also brings heat pollution to the ambient environment. For saving energy, the building itself needs a large amount of domestic hot water supply. If all or part of the condensing heat can be recovered and used for domestic hot water production, not only the environmental pollution caused by the condensing heat will be reduced, but also the energy saving will be achieved. Heat recovering unit is to realize this function by a heat exchanger. High temperature water can be recovered from the high condensing temperature of the air cooled heat recovering unit. This unit can be widely used in the hospitals, hotels, restaurants, factories, bath centers, clubs, etc. As one of the pioneers that design and manufacture large air cooled heat pump units, McQuay has always been devoted to the technical improvement and innovation, and has taken the lead in many aspects in the technical development history of air cooled heat pump unit. MHS is a new air cooled heat pump unit that we have launched for Chinese market. McQuay has introduced the world leading single screw compressor technology to the air cooled heat pump unit, integrated the advanced control technology and adopted high efficiency refrigerant so that it becomes one of the eco-friendly air-conditioning units that have the best efficiency and energy saving performance and the quietest operation among the similar products in the world. At the same time, large fullperformance laboratory devices are built in the Shenzhen Plant so that every product will go through strict performance test before being delivered, thereby to ensure its quality and performance. ISO9001:2000 Quality Management System Certificate Nomenclature ISO14001:2004 Environment Management System Certificate Test Center is approved by CNAS The product has been granted the production license of national industrial products MHS F SR 2 F AA E Export Specifications Power Supply: 380~400V/3Ph/50Hz Refrigerant : 2-R22; 4-R407C Unit : SR: standard total heat recovery SP: standard partial heat recovery Compressor Series Compressor Qty. Cooling Capacity (235usrt) McQuay Single Screw Air Cooled Heat Pump 2

3 Features High resistance, against corrosion The cabinet is made of galvanized steel and coated to provide a high resistance. The unit can be applied under different environment conditions. The rejected heat from exchanger doesn t bring any pollution and meets the ecology requirement. Easy to install and simple to maintain Once power supplies, water piping and water pump provided, no further equipment are needed. The chiller is fully equipped with the necessary electrical components. Our controller monitor the unit operation permanently. In case abnormity happens, the system can perform audio-video alarm and display the fault s cause to ease the maintenance. Stepless modulation high efficiency and saving energy McQuay s unique newest single screw compressor brings high EER. Multiple circuits design, each unit is configured with one or two compressors and each compressor is configured with an independent refrigerant system, which can meet the load requirements. The cooling capacity can be steles ranging from 12.5% to 100% by micro-processor control. Exact control and reliable operation With most advanced electric expansion valve, the unit can control the refrigerant flow as various conditions. Chilled water leaving temperature is controlled to ±0.2. In addition, various sensors can transmit the signals and data to the controller, so the unit components are timely checked in order to keep reliable unit operation. Multiple protections ensure the safety operation of the unit. Three-level password protection prevents non-professional personnel from errors and ensures a safety operation. The compressor start one by one, so the electric current is low to reduce the impact to electric network. Low noise and low vibration As the compact structure, the unit basement bears the loads of compressor, condenser, evaporator, oil separator and the weight of all related refrigerant piping. As our standard features, units are equipped with spring absorber. No vibration is expected from our unique type of F4 single screw compressor. The condenser fan is compete with high efficiency propeller fan, direct drive with low noise. The compressor sound insulation enclosure is provided as standard to decrease the compressor s operation noise effectively. Wide range of applications McQuay heat recovering unit can realize refrigeration and supply heat and domestic hot water. The heat recovering unit can produce hot water by the condensing heat generated in the refrigeration circulation. In the season when air-conditioner or refrigeration equipment is used, the hot water produced by the unit can meet the water supply for the bath use in the guest room, washing use in the kitchen and hot water demand in processing and others. Intelligent control The integrated intelligent control system of McQuay heat recovering unit includes the manmachine operation interface, unit control management, networking and communication, failure protection, alarming, etc. The operations can be implemented safely and automatically. 3

4 Features High efficiency and environmental protection Heat recovering by the McQuay heat recovering unit can be used to reduce the hot island effect caused by the waste heat emission and provide domestic hot water at the same time, which helps protect environment and reduce resource waste and operation costs. Cost-effective The heat recovering type of central air-conditioning can be installed simply without any field limitation. It is safe and has a service life. At the same time, the investment for boiler and the area covering by the boiler can be saved, which is quite convenient for the users. Energy-efficient The heat recovering technology adopted by McQuay heat recovering unit can enhance the cooling efficiency, reduce electric power consumption and extend the operation life of the unit. For the partial heat recovering air-conditioning unit, the heat exchanger on the heat recovering side will absorb part of the condensing heat. Then the heat load of the original condenser is reduced and the heat exchanging efficiency will be enhanced and the efficiency of the airconditioning unit will be increased as well. For the full heat recovering air-conditioning unit, all the condensing heat will be absorbed. So the power consumption by the fan of the original air side heat exchanger can be saved and the power consumption can be reduced significantly. Complete models McQuay provides a full range of recovering units, including partial heat recovering, chilling full heat recovering, heat pump full heat recovering, etc. They can be combined to substitute boiler and provide systematic solutions for the users. 4

5 Air Cooled Single Screw Heat Recovery Unit Operating Mode MCS050.1FSP~MCS380.2FSP Cooling: Chilled water side heat exchanger supplies chilled water to FCU, etc. Cooling + Heat Recovery: Chilled water side heat exchanger supplies chilled water to FCU + heat recovery side supplies hot water MHS050.1FSP~MHS380.2FSP Cooling: Chilled water side heat exchanger supplies chilled water to FCU, etc. Cooling + Heat Recovery: Chilled water side heat exchanger supplies chilled water to FCU + heat recovery side supplies hot water Heating: Chilled water side heat exchanger supplies hot water to FCU, etc Heating + Heat Recovery: Chilled water side heat exchanger supplies hot water to FCU + heat recovery side supplies hot water MHS050.1FSR~MHS185.1FSR Cooling: Chilled water side heat exchanger supplies chilled water to FCU, etc. Cooling + Heat recovery: Chilled water side heat exchanger supplies chilled water to FCU + heat recovery side supplies hot water Heating: Chilled water side heat exchanger supplies hot water to FCU, etc Heater: Only Heat recovery side is available to supply hot water Start periodly: Heating/Heater two modes run alternately as setting MHS200.2FSR~MHS235.2FSR (System1 + System 2) Cooling + Cooling Cooling & Heat recovery + Cooling & Heat recovery Cooling + Cooling & Heat recovery Heat recovery + Heater Heating + Heating Heater + Heater 5

6 Intelligent Network Controller The controller integrates the experience and technology, applying McQuay air cooled heat pump since last 30 years. It is equipped with forecast logical programming software to perform the best combination of compressor and fan at higher EER. The controller can check the parameters and settings and then act accordingly to improve the energy efficiency and maximum reliability. Main functions Multi protection,ensure unit high efficient and stable running. Unit cooling load auto adjusted based on evaporator outlet water temp. Outlet water temp controlled by PID, precision ±0.2 C. Compressor On/Off controlled according to average wear. Both Chinese and English are available. Unit operation status/temp/pressure data etc dispaly. Fault alarm and fault history display. Three-level password protection. Auto re-start after power failure (option). Timing switch on/off function (option). Building management system control (option), Modbus, LonWorks, BACnet are available. Main components (Inner controller) 1. Main controller MaicroTechⅡ Control type: PLC programming Software class: Class A Effective memory: Flash is 2M,and static is 256K Working condition: Temperature is between -20 C to 60 C, and relative humidity is 90% 2. PGD (Display) Language: Chinese or English Interface display: Large LCD, 4-line English or 2-line Chinese Working condition: Temperature is between -20 C to 60 C, and relative humidity is 90% Controlled distance: Effective controlled distance is 250m (AWG22 shielded twisted pair). 3. IO Expansion board No programming, Set the special address is available. 4. EVD No programming, Set the special address is available. PLC controller Building Management System control (optional) ModBus/LonWorks/BACnet protocol interfaces are available to meet centralized and building auto control. Network control 6

7 Single Screw Compressor Compression principles Suction: Gas flows through the suction port into open ends of available grooves. As the screw rotates, gate-rotor teeth enter the seal grooves in sequence, refrigerant gas in chambers defined by three sides of the grooves, the compressor casing and the gate-rotor tooth surface. Compression: Volume in each tooth chamber decreases as the screw rotates. Gas is continuously compressed until the groove leading edge passes the discharge port. Discharge: Release of gas into the discharge chamber ends the compression cycle. Gas continues to be discharged until the gate-rotor reduces groove volume to zero. With two gate-rotors equalized on opposite sides of the screw, this process occurs twice with each screw revolution, doubling the compressor capacity of the unit. 7

8 Single Screw Conpressor Features 1.3 Single Screw Compressor With leading technology, McQuay s semi-hermetic single screw compressor has such features as highefficiency, saving energy, stability, quietness, few operation components and long durability. Few operation components The single screw compressor is equipped with only five operation components: a screw rotor, two gaterotors and two energy adjusting slide valve. The screw rotor is parts painted aluminum, and the gaterotor is equipped with eleven-tooth high strength compound material. Long durability and high reliability With equalizing compression, the single screw can reduce the bearing load to extend the bearing durability. The gate-rotor, which is made of high-intension synthetic material, can keep exact and minimum clearance to ensure the operation is under no abrasion. The oil-ejection and liquid-ejection design of the compressor enables the overheat-gas declines to minimum, which eliminates to decompose the oil and refrigerant in overheat condition. Easy to maintain The gate-rotor box is designed with disassembly side cover, which makes the regular examine easy. Disassembling and installing the pipe provides direct way to examine the internal components of the compressor. Bearing durability The bearing durability of the single screw compressor is as three or five times as that of twin-screw compressor. Low noise and low vibration The single screw compressor performs complete balance load in operation, so its vibration is near to zero and its noise reaches the minimum of the industry standard. It does not contact metal completely in compression, which eliminates high-frequency noise. Abnormity discharge chamber design eliminates discharge noise. Gate-rotor and rotors The single screw compressor, with excellent unique design and special gate-rotor material, and no need for metal hermetic requirement between the gate-rotor and rotors, reaches zero-interval. The liquid refrigerant brings more effects as hermetic, lubricant and cooling material when the compressor rotors operate. What s more, its interval of the teeth is very little and the resistance is very low, which can improve the unit s efficiency. High-efficiency oil separator The system is equipped with high-efficiency oil separator to improve the oil separating efficiency to 99.7%, In this way, the reliability and efficiency are improved in compressor operation. Axial force balance With opposing and equal suction pressure at both ends of the screw member, the huge thrust loads of twinscrew compressor design are eliminated. Radial force balance Gate rotors on both sides of the screw member compressing simultaneously completely balanced radial loading on the rotating screw, nearly eliminates bearing wear. This is a sharp contrast with twin-screw designs whose bearing size is limited and higher loads directly impact bearing life. Twin-screw is with unbalance loading. Without balance compression, the twin-screw increases axial loads and radial loads, and it increases abrasion, which affects the bearing life. 8

9 Accessories Standard accessories (supplied on basic unit) Star Delta Compressors starter For low inrush current and reduced starting torque. Double set-point Dual leaving water temperature set-points. Compressor thermal overload relays Safety devices against compressor motor overloading in addition to the normal protection related to the electrical windings. Fan thermal overload relays Safety devices against fan motor overloading in addition to the normal protection related to the electrical windings. Phase protector The phase monitor controls the phases sequence is correct and controls phase loss. Evaporator electric heater Electric heater controlled by a thermostat to protect the evaporator from freezing down to -15 C ambient temperature. Victaulic evaporator water connection Hydraulic joint with gasket for an easy and quick water connection. General fault relay Contactor for alarm warning. Discharge line shut off valves Installed on the discharge port of the compressor. Flow switch Supplied separately to be wired and installed on the evaporator water piping (by the customer). Spring type vibration mounts Supplied separately, these have to be positioned under the base of the unit during installation. Ideal for dampening vibrations on roofs installation and metallic structures. Optional accessories (on request) Speed control Continuous fan speed modulation on the first fan of each circuit. It allows the unit working with air temperature down to -15 C. Golden and blue fin condenser Coil High pressure guages Low pressure guages Cu-Cu condenser coils To give better protection against corrosion by aggressive environments. 50/100 Pa lifts fans For all the applications where a higher fans lift is required. (Fan speed controller not available with this option). Soft start Electronic starting device to reduce inrush current and to start compressors gradually, with very low mechanical stress. BMS (Building Management System) protocol Modbus, LonWorks, BACnet 9

10 McQuay Single Screw Air Cooled Chiller (R22, SP partial heat recovery) MCS/MHS F SP Cooling Capacity kw USRT Heating Capacity kw USRT Heat Recovery Capacity kw Panel EG Capacity Adjusting Range 0,25~100% Power Supply V/Ph/Hz 380~400/3/50 R22 Refrigerant Circuit 1 Control Electronic Expansion Valve Model*Qty. HSS 3118*1 3120*1 3121*1 3122*1 3220*1 3221*1 4221*1 4222*1 4223*1 4223*1 Motor Power Input kw Motor Power Input Compressor (Heating) kw Sound Insulation Box Optional Polyurethane Foaming Start star-delta Cooling Liquid Injection Oil LPT68 Charge L Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Fan Air Flow 104m 3 /h Power Input kw Shell and Tube Water Flow m 3 /h Evaporator Water Flow (Heating) m 3 /h WPD (kpa) Connection inch 5 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm MCS/transport kg Weight MCS/operation kg MHS/transport kg MHS/operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions: 12/7 EWT and LWT,35 ambient temperature; 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature; 4. Heat recovery conditions are: 50/55 EWT and LWT of hot water, 12/7 EWT and LWT of chiller water. 10

11 McQuay Single Screw Air Cooled Chiller (R22, SP partial heat recovery) MCS/MHS F SP Cooling Capacity kw USRT Heating Capacity kw USRT Heat Recovery Capacity kw Panel EG Capacity Adjusting Range 0,12.5~100% Power Supply V/Ph/Hz 380~400/3/50 R22 Refrigerant Circuit 2 Control Electronic Expansion Valve Model*Qty. HSS 3220*2 3220*1 4221*1 4222*1 3221*2 4221*2 4222*2 3221*1 4222*1 4223*1 4223*2 4223*2 Motor Power Input kw Motor Power Input Compressor (Heating) kw Sound Insulation Box Polyurethane Foaming Start star-delta Cooling Liquid Injection Oil LPT68 Charge L 2*18 2*16 Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Fan Air Flow 104m 3 /h Power Input kw Shell and Tube Water Flow m 3 /h Evaporator Water Flow(Heating) m 3 /h WPD (kpa) Connection inch 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm 2360 MCS/transport kg Weight MCS/operation kg MHS/transport kg MHS/operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions: 12/7 EWT and LWT,35 ambient temperature; 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature; 4. Heat recovery conditions are: 50/55 EWT and LWT of hot water, 12/7 EWT and LWT of chiller water. 11

12 McQuay Single Screw Air Cooled Chiller (R407C, SP partial heat recovery) MCS/MHS F SP Cooling Capacity kw USRT Heating Capacity kw USRT Heat Recovery Capacity kw Panel EG Capacity Adjusting Range 0,25~100% Power Supply V/Ph/Hz 380~400/3/50 R407C Refrigerant Circuit 1 Control Electronic Expansion Valve Model*Qty. HSS 3118*1 3120*1 3121*1 3122*1 3220*1 3221*1 4221*1 4222*1 4223*1 4223*1 Motor Power Input kw Motor Power Input Compressor (Heating) kw Sound Insulation Box Optional Polyurethane Foaming Start star-delta Cooling Liquid Injection Oil RL68H Charge L Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Fan Air Flow 104m 3 /h Power Input kw Shell and Tube Water Flow m 3 /h Evaporator Water Flow (Heating) m 3 /h WPD (kpa) Connection inch 5 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm MCS/transport kg Weight MCS/operation kg MHS/transport kg MHS/operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions: 12/7 EWT and LWT,35 ambient temperature; 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature; 4. Heat recovery conditions are: 50/55 EWT and LWT of hot water, 12/7 EWT and LWT of chiller water. 12

13 McQuay Single Screw Air Cooled Chiller (R407C, SP partial heat recovery) MCS/MHS F SP Cooling Capacity kw USRT Heating Capacity kw USRT Heat Recovery Capacity kw Panel EG Capacity Adjusting Range 0,12.5~100% Power Supply V/Ph/Hz 380~400/3/50 R407C Refrigerant Circuit 2 Control Electronic Expansion Valve Model*Qty. HSS 3220*2 3220*1 4221*1 4222*1 3221*2 4221*2 4222*2 3221*1 4222*1 4223*1 4223*2 Motor Power Input kw Motor Power Compressor Input (Heating) kw Sound Insulation Box Polyurethane Foaming Start star-delta Cooling Liquid Injection Oil RL68H Charge L 2*18 2*16 Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Fan Air Flow 104m 3 /h Power Input kw Shell and Tube Water Flow m 3 /h Evaporator Water Flow (Heating) m 3 /h WPD (kpa) Connection inch 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm 2360 MCS/transport kg Weight MCS/operation kg MHS/transport kg MHS/operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions: 12/7 EWT and LWT,35 ambient temperature; 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature; 4. Heat recovery conditions are: 50/55 EWT and LWT of hot water, 12/7 EWT and LWT of chiller water. 13

14 McQuay Single Screw Air Cooled Chiller (R22, SR total heat recovery) MHS F SR Cooling kw USRT Heating kw USRT Heat Recovery kw Panel EG Capacity Adjusting Range 0,25~100% 0,12.5~100% Power Supply V/Ph/Hz 380~400/3/50 R22 Refrigerant Circuit 1 2 Control Electronic Expansion Valve Model*Qty. HSS 3118*1 3120*1 3121*1 3122*1 3220*1 3221*1 4221*1 4222*1 4223*1 4223*1 3220*2 3220*1 3221*1 3221*2 Motor Power Input kw Motor Compressor Power Input kw (Heating) Sound Insulation Optional Polyurethane Foaming Box Start star-delta Cooling Liquid Injection Oil LPT68 Charge L *18 2*18 2*18 Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Fan Air Flow 104m 3 /h Power Input kw Shell and Tube Water Flow m 3 /h Evaporator Water Flow (Heating) m 3 /h WPD (kpa) Connection inch 5 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm Weight MHS/ transport kg MHS/ operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions. 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature. 4. Hear recovery conditions are: 40 /45 EWT and LWT of hot water,12 /7 of chilled water. 14

15 McQuay Single Screw Air Cooled Chiller (R407C, SR total heat recovery) MHS F SR Cooling kw USRT Heating kw USRT Heat Recovery kw Panel EG Capacity Adjusting Range 0,25~100% 0,12.5~100% Power Supply V/Ph/Hz 380~400/3/50 R407C Refrigerant Circuit 1 2 Control Electronic Expansion Valve Model*Qty. HSS 3118*1 3120*1 3121*1 3122*1 3220*1 3221*1 4221*1 4222*1 4223*1 4223*1 3220*2 3220*1 3221*1 3221*2 Motor Power Input kw Motor Compressor Power Input kw (Heating) Sound Insulation Optional Polyurethane Foaming Box Start star-delta Cooling Liquid Injection Oil RL68H Charge L *18 2*18 2*18 Crossed Fin and Tube Condenser FPI 14 Face Area m Qty Air Flow 104m 3 /h Fan Power kw Input Shell and Tube Water Flow m 3 /h Evaporator Water Flow (Heating) m 3 /h WPD (kpa) Connection inch 5 8 Heat Recovery Heat exchanger BPHE Length mm Dimensions Width mm 2260 Height mm Weight MHS/ transport kg MHS/ operation kg Accessories (Standard) Unit Operation Instruction, Confirmity Certification, Warranty Application Form, Spring Damper, Water Flow Switch Notes: 1. All specifications are subjected to change by the manufacturer without prior notice. 2. Nominal cooling capacity is based on the following conditions. 3. Nominal heating capacity is based on the following conditions: 40/45 EWT and LWT,7/6 ambient DB/WB temperature. 4. Hear recovery conditions are: 40 /45 EWT and LWT of hot water,12 /7 of chilled water. 15

16 Operating Limit and Correction Factors Operating Limit Model SR SP Cooling Heating Cooling Heating Max.outside temperature Min. outside temperature without Fan Speed Control with Fan Speed Control Max. leaving chilled water temperature (water side heat exchanger) Min. leaving chilled water temperature without Glycol (water side heat exchanger) with glycol Max. temperature difference of water side exchanger Min. temperature difference of water side exchanger Heat Recovery Side Max. leaving water temperature Heat Recovery Side Max. water temperature difference Heat Recovery Side Min. water temperature difference

17 Fouling factors (water side heat exchanger) Fouling factor (m 2 C/kw) Cooling capacity correction Power correction COP correction Altitude correction factors Elevation above sea level (m) Barometric pressure (bar) Cooling capacity correction factor Power input correction factor Ethylene glycol correction factors % Of ethylene glycol by weight Cooling capacity correction factor Power input correction factor Water flow rate correction factor Water pressure drops correction factor Low temperature operation performance factors Ethylene glycol leaving water temperature of chilled water ( C) Max. ambient temperature ( C) Cooling capacity correction factor Power input of compressor correction factor Min. % of ethylene glycol

18 Dimensions Unit: mm Model Depth D Height H Model Depth D Height H

19 SCHEMATIC DRAWING - HEAT RECOVERY UNIT 19

20

21 Literature No.: TM-MHS(F HR)-1101A Supersedes: --- Part No.: M McQuay International +1 (800) While utmost care is taken in ensuring that all details in the publication are correct at the time of going to press, we are constantly striving for improvement and therefore reserve the right to alter model specifications and equipment without notice. Details of specifications and equipment are also subject to change to suit local conditions and requirements and not all models are available in every market. 21