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Installation, Operation, and Maintenance
Thermafit™ Modular Air-Source
Multipipe
Model MAS
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment
can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
May 2024
SAFETY WARNING
ARTC-SVX015A-EN
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Table of Contents
Related Manuals for Trane Thermafit MAS
Summary of Contents for Trane Thermafit MAS
- Page 1 Installation, Operation, and Maintenance Thermafit™ Modular Air-Source Multipipe Model MAS SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.
- Page 2 (HCFCs). Not all refrigerants containing these compounds bump cap, fall protection, electrical PPE and arc have the same potential impact to the environment. Trane flash clothing). ALWAYS refer to appropriate advocates the responsible handling of all refrigerants.
- Page 3 This document and the information in it are the property of regulations are more stringent than these Trane, and may not be used or reproduced in whole or in policies, those regulations supersede these part without written permission. Trane reserves the right to policies.
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Page 4: Table Of Contents
Table of Contents Model Number and Coding ....6 Installation Piping......19 Multipipe Model and Serial Numbers . - Page 5 Table of Contents Overview 2 – Compressor 1/ Bank Controls Sequence ....50 Compressor 2 ......36 Start-Up.
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Page 6: Model Number And Coding
For future reference, record the model number and serial that is affixed to each module. number for each module in the air-source multipipe system in the table below. Refer to the Trane nameplate on each module in the installed unit for the serial number and model number. -
Page 7: Air-Source Multipipe Description
This manual provides relevant data to properly operate, construction and operation of the equipment. As required maintain, and troubleshoot the Trane MAS air-source under Federal regulations, installation, initial start-up, and modular multipipe. Operator and maintenance personnel... -
Page 8: Air Coils And Fans
Air-Source Multipipe Description Air Coils and Fans The fan motors are maintenance free, highly efficient Electronically Commutated Motors (ECM) with energy- The air coils have aluminum fins mechanically bonded to reduction capabilities. The fan motors vary speed to copper tubes that functions as an evaporator or condenser maintain the refrigeration head pressure. -
Page 9: General Data
General Data Table 2. General data – Thermafit™ MAS air-source multipipe Capacity (Nominal Tons) Compressor Type Vapor Injected Scroll Quantity 1 Tandem Set of 2 Compressors Refrigerant R-454B Charge (lbs/module) Load Heat Exchanger Type Brazed Plate Quantity Fluid Volume (gal/BPHE) 3.45 Fluid Volume (gal/module) 33.2... -
Page 10: Unit Dimensions And Weights
General Data Unit Dimensions and Weights Figure 1. MAS air-source multipipe - 30 tons Table 3. Unit dimensions and weight - 30 tons (MAS) Unit Sizes and Weights Per Module Units inch Operating Weight ~3000 ARTC-SVX015A-EN... -
Page 11: Pre-Installation
The further the multipipe is from such obstacles, the more located in a pit (sub-level site), contact Trane to discuss efficiently it will operate. potential impact on equipment performance. -
Page 12: Mounting Rails
Figure 2. Recommended clearances Note: If unit is surrounded by a fence, the minimum clearance is 36 inches. The fence must allow 50% airflow. Note: These clearances are general recommendations. Each installation has specific considerations. Contact Trane for guidance. Mounting Rails Figure 3. -
Page 13: A2L Work Procedures
At all times, Trane’s maintenance and service guidelines • Do not puncture refrigerant tubing. shall be followed. In in doubt, contact Trane technical support for assistance. • Dispose of properly in accordance with federal or local regulations. -
Page 14: Leak Detection
Use control settings, where available. When not available, manually open all electronically controlled valves using • Replace electrical components with Trane replacement acceptable service procedures. parts, or those meeting the same ratings and qualified for flame arrest protection, UL LZGH2 category. -
Page 15: Decommissioning
A2L Work Procedures • Cylinders shall be kept in an appropriate position a. Mechanical handling equipment is available, if according to the instructions. required, for handling refrigerant cylinders. • Ensure that the refrigerating system is earthed prior to b. All personal protective equipment is available charging the system with refrigerant. -
Page 16: Installation Mechanical
Any damage must be operates properly after installation. reported to the motor carrier and Trane within five days of The customer must notify Trane during the sales process receipt of the shipment. -
Page 17: Handling Of The Modules
Failure to adhere to these long-term storage requirements times. may void the Trane warranty. Any component that is • Remove all wire scraps, tools, replace all doors, damaged or inoperable due to improper storage may have covers and protective devices before powering its warranty voided. - Page 18 Installation Mechanical Figure 4. Recommended multipipe rigging ARTC-SVX015A-EN...
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Page 19: Installation Piping
Installation Piping Install Piping and External Only after the above steps have been completed should the water piping be connected to the air-source multipipe Components system. Proper support of piping and pipe hangers must consider Dowfrost the weight of the piping as well as the water weight inside the pipes. -
Page 20: Installation Electrical
Installation Electrical Connecting Module Power and sets the under-voltage trip point. Check the phase monitor after initial start-up. If it fails to energize, (the LED glows Control Wires red or blinks) check the wiring of all three phases, voltage, and phase sequence. If phase sequence is incorrect, the Connections are typically made at the power distribution LED flashes green/red. - Page 21 Installation Electrical wired to the Ethernet switch is typically in the primary module. ARTC-SVX015A-EN...
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Page 22: Operating Principles
Operating Principles A typical HVAC system has a cooling requirement in temperature control and helps limit unacceptable short summer and shoulder seasons and a heating requirement cycling of compressors. in winter and shoulder seasons. Often there is both a A minimum of 50 times a modules nominal capacity or four- simultaneous heating and cooling demand to satisfy all of minute full load water circulation, whichever is greater, is which are within the functional capability of an MAS... -
Page 23: Operating Procedures
Operating Procedures Operator Interface Panel-Mounted Disconnect Switch Some systems are optionally equipped with a panel- The modular air-source systems, whether they are mounted disconnect switch installed on the outside of the composed of three modules or up to 10, are automated power distribution panel (or on each modules electrical and systems that use a main electrical panel to monitor, report, control panel if the multipipe has power supplied to each... -
Page 24: Panel
The basic level, ‘user,’ does not require a password. The higher access levels are the technician (‘tech’) and administrator (‘admin’) levels that can only be accessed by Trane technical personnel. Contact Trane technical support regarding the possibility of any potential issues involving the higher-level functions. -
Page 25: Touchscreen Interface Panel
Operating Procedures functions involving temperatures, pressures, set points, Figure 8. Touchscreen interface panel alarms, operating schedules, elapsed operating hours, etc. This touchscreen interface panel can be located within proximity of the primary microprocessor controller. It is typically located in the primary module. The touchscreen interface is connected to and communicates with all module controllers via the Ethernet switch. -
Page 26: Home Screen Features
Operating Procedures Home Screen Features Figure 10. HMI home screen ARTC-SVX015A-EN... - Page 27 Operating Procedures Table 4. Home screen features Feature Description 1 - HMI Software Version Calls up the pop-up window • Project Name: HMI software project name • Software Version: HMI software version • Consists of 4 two-digit numbers – First two numbers stand for major and minor software revision. –...
- Page 28 Operating Procedures Table 4. Home screen features (continued) Feature Description 5 - Setpoint Calls up cooling/heating setpoint pop-up screens respectively depending on the mode. Accessible for 'tech' only. The other settings are viewable only. These dialog boxes display the resulting cooling/heating setpoint used for machine temperature control.
- Page 29 Operating Procedures Table 4. Home screen features (continued) Feature Description 9- System ON/OFF The system on and off options are as follows: • OFF – turn off multipipe bank. • ON – turn on multipipe bank • BMS – multipipe bank is turned on/off by BMS. 10- Pumps Operation States Evaporator/Condenser Pumps operation state - green LED indicates that corresponding set of pumps is enabled;...
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Page 30: Modules Layout Screen
Operating Procedures Modules Layout Screen Module Layout Screen Status Conditions Each module picture is a set of images that show real-time The air-source multipipe system can be composed of up to color-coded state of compressor, refrigeration circuit, a maximum of ten modules. Pressing the LAYOUT button isolation valves, fans, and module. -
Page 31: Active Alarms Screen
Operating Procedures Active Alarms Screen State Alarm is Active (Triggered) if State Value = 1 (still active in the PLC). Alarm is Not Active (Not Triggered) if State Value = 0 (can be reset using Reset button). Figure 15. Active alarms for the multipipe Both Active and Non Active alarms can be acknowledged. - Page 32 Operating Procedures Sorting Alarms Filtering The alarm history list can be sorted by any column in State Filter applies to Alarm State. ascending or descending order by tapping the corresponding column heading. The triangle that appears next to the heading indicates which column is being sorted and the direction of sorting.
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Page 33: Module Access
Operating Procedures Combining both State Filter and Status Filter can enhance bank. Buttons are viewable (modules accessible) for alarms viewing even more. modules that communicate to HMI only. Each module menu includes the following set of screens. For instance, one needs to view only events when alarms occurred and hide all other ones (aka one alarm event for •... -
Page 34: Overview 1 - Module
Operating Procedures Table 6. The overview screens Primary Overview 1 Module Screen Secondary Overview 1 Module Screen Primary Overview 2 Module Screen Secondary Overview 2 Module Screen Overview 1 - Module • Primary - Module acts as a primary module. Primary module performs temperature control for either heating Module En/Dis or cooling loads. - Page 35 Operating Procedures Note: Stand-alone module operates as • Switching to Simult - Module is switching to independent multipipe module and controls Simultaneous Mode. cooling/heating temperatures locally based • Switching to Heat - Module is switching to Heating on its Evaporator/Condenser EWT/LWT Mode.
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Page 36: Overview 2 - Compressor 1/ Compressor 2
Operating Procedures Comp Status • Comp OFF - Compressor is off and cannot be turned valve is opening. • Ready - Compressor is ready to run. valve is closing. • Vapor Injection Controller Screen • OFF by Cond Flow - Compressor is waiting for Condenser Flow confirmation. -
Page 37: Module I/O Screens
Operating Procedures • Cool Temp Diff +/- – Cooling temperature control When the module screen is displayed, pressing the I/O differential above/below setpoint or positive/negative button displays the I/O menu. dead band (DB). I/O menu is comprised of five screens for Primary Module •... -
Page 38: Digital Leds
Operating Procedures Table 7. The input/output screens Primary/Seconday I/O Analog Screen Primary/Seconday I/O Digital Screen Primary/Seconday I/O Expansion Screen#2 Primary/Seconday I/O Expansion Screen#1 Primary I/O Expansion Screen #3 When an I/O screen is displayed, switching to other I/O Gray LED — This digital input is de-energized; the screens is accomplished by pressing their respective connected device is open. -
Page 39: Analog Outputs
Operating Procedures • DI closed – compressors are in no-alarm state Suction Pressure • DI opened – compressors are in alarm state UI10 Discharge Pressure Phase Monitor – Three phase power supply protection module feedback. • DI closed – no power supply issues. Ambient Temperature •... -
Page 40: Expansion Io Screen 2
Operating Procedures • Green LED – valve has reached the respective • DI Closed – Transformer temperature is within normal position. range. • Grey LED – specified valve position has not been • DI Open – Transformer temperature is exceeding reached. - Page 41 Operating Procedures Figure 17. Cooling trend screen Table 8. Trend screen labels Label Description According to where the cursor is placed, it is capturing real time values of in and out water temperatures. Current cursor timestamps are displayed as well. Text box to select viewing time span.
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Page 42: Operator Tasks
Operating Procedures Figure 18. Heating trend screen WARNING Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. -
Page 43: Water Quality Guidelines
Water Quality Guidelines Note: Trane will not validate the equipments warranty if the proper water/glycol mixture composition and quality The multipipe is equipped with high efficiency compact is not maintained. -
Page 44: Prevent Freezing
The fluid volume increases as this slush forms and the prevention is using the appropriate concentration of glycol. temperature cools, flowing into available expansion volume Trane does not warranty any component that fails due to in the system. If the concentration of glycol is sufficient, no freezing. - Page 45 Operating Procedures Table 11. Freeze and burst protection chart exchanger, the inhibitors are an approved glycol solution will best protect the surfaces of the load heat exchanger Water/Glycol against oxidation if the glycol remains inside the unit during Freeze Protection Burst Protection Temperature storage.
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Page 46: Controls Interface
Controls Interface Microprocessor Control System Figure 22. Touch interface panel MAS air-source multipipe models employ a Carel c.pCO all-digital data control system to control and report key system settings and indicators. Primary Microprocessor Controller Both the primary and secondary modules use a Carel c. pCO medium microprocessor controller. -
Page 47: Electrical Controls
Controls Interface Main Power Distribution Module Electrical and Control Panel The power distribution panel distributes electricity from the The Electrical and Control Panel receives power from the external building power supply. It also houses a circuit power distribution panel and provides power to the breaker for each module, a phase monitor, and an optional individual electrical components in that module. -
Page 48: Refrigeration Controls
Controls Interface Electronic and Manual Isolation Valves prevents a motor from operating in reverse—if any of the three legs of power are landed incorrectly—and will shut Each evaporator and condenser branch line includes a the system down upon detection of a reversed phase manual inlet and an electronic discharge butterfly valve that condition. - Page 49 Controls Interface Thermal Capacity plate heat exchanger and keeping debris out of the aircoil. In applications where it is desired to operate with a lower The thermal capacity of the multipipe modules is flow rate or higher temperature change, consult technical dependent on the leaving temperature of the fluid support for recommendations.
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Page 50: Sequence Of Operations
Sequence of Operations This manual describes a typical air-source multipipe time rotation is enabled, rotation period has to expire system with few, if any, optional components or devices before lead is rotated. Demand rotation rotates lead attached. when the last compressor is staged off. •... - Page 51 Sequence of Operations maintain minimum speed standing by for cooling and ready for heating demand increase any time. demand increase any time. Alternatively, MAS Bank switches over to cooling The same operational state can be achieved by mode where hot water pumps will no longer run due switching MAS Bank in heating mode.
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Page 52: Start-Up
Start-Up Preparation for Initial Start-Up 5. Inspect all electrical connections to ensure terminals are secure. After the system is completely installed with all wires 6. Inspect all fuses and overload settings to ensure they connected and all piping securely coupled, the air-source conform to specifications. - Page 53 Check the box if there are any customer-supplied devices connected to the multipipe wiring. ☐ List devices: ______________________________________________________________________________________ Check the box if there are any Trane remote devices connected to the multipipe wiring. ☐ Check the box if voltage drops are detected.
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Page 54: Start-Up
Note: To view the software version, from the home screen, press the software button on the System Control screen. Start-Up As part of a continuous commitment to quality, initial start- up of this system must be done by Trane. ARTC-SVX015A-EN... -
Page 55: Maintenance Procedures
The primary goal of preventive maintenance is to avoid the Responsible refrigerant practices are important to the consequences of equipment failure. Trane chillers are environment, our customers, and the air conditioning designed for ease of access with a premium placed on industry. -
Page 56: Weekly
Maintenance Procedures Table 13. Recommended multipipe service intervals (continued) Frequency Task Clean strainers on the inlet water pipe Monthly Check the compressor oil level sight glass Monthly Confirm the glycol concentration Monthly Confirm the refrigeration pressures Monthly Check the refrigeration liquid line sight glass Monthly Inspect refrigerant pressures and temperature set points Quarterly... -
Page 57: Quarterly
Maintenance Procedures Quarterly NOTICE Compressor Failure! The quarterly maintenance inspection is a comprehensive event that examines all aspects of the multipipe to identify Failure to follow instructions below could result in early problems before they can cause damage and require catastrophic compressor failure. -
Page 58: Maintenance Tasks
8. If equipped, tighten Rotalock fittings. The On multiple module multipipes, Trane provides service recommended torque is 80 ft-lbs for 2 inch and larger isolation valves on each load heat exchanger to isolate and 60 ft-lbs for Rotalock fittings smaller than 2 inches. - Page 59 Trane recommends using straight tap water Apply a light coating of lubrication to the gasket. except in extreme cases. (Take extra precautions by covering electrical components with plastic bags, etc.)
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Page 60: Controller Tasks
Verify that no power is present with a voltmeter. Trane recommends using SWEP Goodway® Technologies 2. The PLC logic controller is DIN rail-mounted. Once ScaleBreak-MP, an industrial biodegradable descaler... -
Page 61: Multipipe Troubleshooting
Isolation Fault detection is recognizing that a problem has occurred, Trane manufactures equipment with embedded fault even if the root cause is not yet known. Fault isolation is the detection and diagnostics in each modules controller that... - Page 62 Multipipe Troubleshooting Type Alarm Action Shuts down module if LP Alarm Mode = Sensor UI4 sensor failure Auto Reset (detailed under Setup) UI5 sensor failure Auto Reset Shuts down module Shuts down local heating control UI6 sensor failure Auto Reset Warning UI7 sensor failure Auto Reset...
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Page 63: Compressor Diagnostic Codes
When any resistance of the thermistor chain reaches the tripping value, the module interrupts the control line and Compressors used in Trane air-source multipipes use solid causes the compressor to switch off. After the thermistor state protection and have PTC (Positive Temperature... -
Page 64: Kriwan Flash Codes
Multipipe Troubleshooting KRIWAN Flash Codes There is a 1.5 second pause before the red pulse sequence. There is a 0.8 second pause between the red The KRIWAN flash code allows for a quick and easy status and orange pulse sequences. The error code can be display and troubleshooting. - Page 65 Multipipe Troubleshooting Note: An anti-short cycle timer is included in the primary minimum compressor run timers. Take these fixed microprocessor controller to prevent the timer parameters into consideration when compressors from starting until the delay has conducting a fault isolation process. elapsed.
- Page 66 Multipipe Troubleshooting 5. Symptom: Compressor loses oil Possible Causes Potential Solutions Low refrigerant charge Check for leaks and repair. Add refrigerant to proper charge. Low refrigerant velocity caused by operation outside operating envelope; Oil trapped in the system check fan settings and functionality in heating mode. Replace crankcase heater.
- Page 67 Multipipe Troubleshooting 8. Symptom: Low refrigerant discharge pressure Possible Causes Potential Solutions Insufficient refrigerant in the system ; Improper charge Check for leaks, repair, and add refrigerant as needed. Faulty compressor Check compressor. Low ambient conditions in cooling mode Check design condition. Low suction pressure See ‘Low refrigeration suction pressure’.
- Page 68 Multipipe Troubleshooting 13. Symptom: No low voltage (24 Vac) Possible Causes Potential Solutions Transformer primary side fuse open Check fuse prong contact points; Replace fuse. Replace transformer. Transformer defective No primary voltage on transformer Check breakers, fuses; check power supply specifications. 14.
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Page 69: Request For Initial Start-Up
Trane at As part of a continuous commitment to quality, initial start- least 10 working days prior to the scheduled initial start-up up of this equipment by a factory-certified technician may date. -
Page 70: Initial Start-Up Agreement
Request for Initial Start-Up Initial Start-Up Agreement start-up technician. Payment for an aborted start-up will be forfeited. Rescheduled initial start-ups are subject to any additional costs that may have been incurred by the technician. An approved purchase order or payment in By signing this form, you agree the system is ready for advance will be required to reschedule an aborted initial initial start-up. - Page 71 Notes ARTC-SVX015A-EN...
- Page 72 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.
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