Nibe CLIMATEMASTER TRANQUILITY Series Installation, Operation & Maintenance Manual
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Nibe CLIMATEMASTER TRANQUILITY Series Installation, Operation & Maintenance Manual

Nibe CLIMATEMASTER TRANQUILITY Series Installation, Operation & Maintenance Manual

Versatile two-stage, 60hz - r-454b
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RESIDENTIAL
TranquiliTy® 24 (SZ) VerSaTile Two-STage SerieS
INSTALLATION, OPERATION
& MAINTENANCE MANUAL
Part#: 97B0075N36 | Revised: January 28, 2025
Models: SZ 024-060
60Hz - R-454B

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  • Page 1 RESIDENTIAL TranquiliTy® 24 (SZ) VerSaTile Two-STage SerieS INSTALLATION, OPERATION & MAINTENANCE MANUAL Part#: 97B0075N36 | Revised: January 28, 2025 Models: SZ 024-060 60Hz - R-454B...

  • Page 2: Table Of Contents

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Table of Contents 024-060 Model Nomenclature Electrical Data: CV EC Blower Motor Attentions, Cautions, and Warnings Electrical: Power Wiring General Information Electrical: DXM2.5 Example Wiring Diagram Minimum Installation Area Electrical: Low-Voltage Wiring Refrigerant System Servicing Electrical: Thermostat Wiring Physical Data Blower Performance Data...

  • Page 3: Model Nomenclature

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Model Nomenclature RESIDENTIAL 024-060 MODEL STANDARD S = R-454B Refrigerant S = Standard MODEL TYPE BLOWER MOTOR Z = Versatile Two-Stage Series V = Constant Volume (CV) EC SUPPLY & RETURN EXTENDED OPTIONS CONFIGURATIONS 0 = Standard P = HWG and Pump...

  • Page 4: Attentions, Cautions, And Warnings

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Attentions, Cautions, and Warnings 024-060 SAFETY WARNING All refrigerant discharged from this unit must be recovered WITHOUT Warnings, cautions, and notices appear EXCEPTION. Technicians must follow industry accepted guidelines and throughout this manual. Read these items carefully all local, state, and federal statutes for the recovery and disposal of refrigerants.
  • Page 5 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Attentions, Cautions, and Warnings 024-060 CAUTION DO NOT store or install units in corrosive environments or in locations subject to temperature or humidity extremes (e.g., attics, garages, rooftops, etc.). Corrosive conditions and high temperature or humidity can significantly reduce performance, reliability, and service life.

  • Page 6: General Information

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: General Information 024-060 INSPECTION PRE-INSTALLATION Upon receipt of the equipment, carefully check the Installation, Operation, and Maintenance instructions shipment against the bill of lading. Make sure all units are provided with each unit. Horizontal equipment have been received.
  • Page 7 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: General Information 024-060 Work Procedure Checks to the Refrigeration Equipment Work shall be undertaken under a controlled procedure The following checks shall be applied to installations so as to minimise the risk of a flammable gas or vapor using FLAMMABLE REFRIGERANTS: being present while the work is being performed.

  • Page 8: Repair To Intrinsically Safe Components

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: General Information 024-060 REPAIR TO INTRINSICALLY SAFE COMPONENTS NOTE: You can use Imperial or Metric measurements to Intrinsically safe components must be replaced. calculate A or TA The maximum allowable altitude of installation CABLING for this product is 6,561 ft (2,000 m).

  • Page 9: Minimum Installation Area

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Minimum Installation Area 024-060 MINIMUM INSTALLATION AREA Minimum area where a blower-equipped unit must be installed, and mechanical/natural ventilation is not required Minimum Installation Minimum area where unit is installed where unit Charge Area ft ) [A Model...

  • Page 10: Refrigerant System Servicing

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Refrigerant System Servicing 024-060 REFRIGERANT SYSTEM Charging Procedures Verify that air- and water-flow rates are at proper levels before servicing the refrigerant circuit. To maintain In addition to conventional charging procedures, the sealed-circuit integrity, do not install service gauges following requirements shall be followed: unless unit operation appears abnormal.
  • Page 11 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Refrigerant System Servicing 024-060 of Ignition and is suitable for the refrigerant used. Before attempting the procedure, ensure that: Leak-detection equipment shall be set at a Mechanical-handling equipment is available, percentage of the lower flammability limit of the if required, for handling refrigerant cylinders.
  • Page 12 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: 024-060 RECOVERY When removing refrigerant from a system, either for In addition, a set of calibrated weighing scales servicing or decommissioning, it is recommended shall be available and in good working order. good practice that all refrigerants are removed safely. Hoses shall be complete with leak-free disconnect couplings and in good condition.

  • Page 13: Physical Data

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Physical Data 024-060 Tranquility (SZ) Series Unit Size Compressor (1 Each) Scroll Number of refrigerant circuits Factory Charge R-454B (oz) Refrigerant Leak Detection System Number of Sensors Water Connection Size Swivel 1” 1” 1”...

  • Page 14: Horizontal Installation

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Horizontal Installation 024-060 HORIZONTAL UNIT LOCATION The installation of water source heat pump units and all associated components, parts and accessories which Units are not designed for outdoor installation. Locate make up the installation shall be in accordance with the unit in an INDOOR area that allows enough the regulations of ALL authorities having jurisdiction space for service personnel to perform typical...

  • Page 15: Horizontal Installation: Service Access

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Horizontal Installation: Models: Service Access 024-060 Left Return Back Discharge Right Return Back Discharge Supply Supply Air Flow Air Flow Return Return Air Flow Air Flow Front Front Left Return Straight Discharge Right Return Straight Discharge Return Supply Supply...
  • Page 16 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Actual area is 3.5313” w x 8.875”h Horizontal Installation 024-060 Guides indicate .125” bleed all around Figure 2: Horizontal Unit Pitch 1/4” (6.4 mm) pitch toward drain for drainage HORIZONTAL INSTALLATION Drain connection Figure 3: Typical Horizontal Unit Installation Figure 3: Typical Unit Installation 3/8"...

  • Page 17: Condensate Piping

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Horizontal Installation 024-060 CONDENSATE PIPING STAINLESS STEEL DRAIN PANS Actual area is 3.5313” w x 8.875”h A condensate drain line must be installed and The condensate connection is 3/4-inch MPT. Field- pitched away for the unit to allow for proper provided female adapter required for condensate Guides indicate .125”...

  • Page 18: Duct System Installation

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Duct System Installation 024-060 DUCT SYSTEM INSTALLATION Proper duct sizing and design is critical to the An unventilated area where water source performance of the unit. The duct system should heat pump is installed and surpasses a R-454B be designed to allow adequate and even airflow refrigerant charge of 62 oz (1.76 kg), shall be without through the unit during operation.

  • Page 19: Field Conversion Of Air Discharge

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Actual area is 3.5313” w x 8.875”h Field Conversion of Air Discharge 024-060 Guides indicate .125” bleed all around Figure 5: Left Return – Side-to-Back OVERVIEW Remove Screws Water Horizontal unit blower assembly can be field Connection End converted between side (straight) and back (end) discharge using the instructions below.

  • Page 20: Vertical Installation

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Vertical Installation 024-060 VERTICAL UNIT LOCATION For optimal sound performance, install the unit on a piece of rubber, neoprene, or other mounting Units are not designed for outdoor installation. Locate pad material for sound isolation. The pad should the unit in an INDOOR area that allows enough space be at least 3/8-inch (10 mm) to 1/2-inch (13 mm) in for service personnel to perform typical maintenance...
  • Page 21 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Vertical Installation 024-060 SOUND ATTENUATION FOR VERTICAL UNITS CONDENSATE PIPING FOR VERTICAL UNITS Sound attenuation is achieved by enclosing the unit A condensate line must be installed and pitched within a small mechanical room or a closet. Additional away from the unit to allow for proper drainage.

  • Page 22: Vertical Installation: Service Access

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Actual area is 7.25” w x 8.875”h Vertical Installation: Models: Guides indicate .125” bleed all around Service Access 024-060 Vertical Units Left Return Supply Air Opening Front CCP and BSP Right Return Supply Air Opening Front CCP and BSP...

  • Page 23: Water Connections

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Piping Installation 024-060 WATER CONNECTIONS Swivel piping fittings are used for water connections that are rated for 300 psi (2,068 kPa) operating pressure. The connections have a rubber gasket seal similar to a garden hose gasket, which when mated to the flush end of most 1-inch threaded male pipe fittings provides a leak-free seal without the need for thread sealing tape or joint compound.

  • Page 24: Vflow Heat Pump Applications Overview

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: vFlow Heat Pump Applications Overview 024-060 vFlow® is a revolutionary new, intelligent, and efficient Internal Flow Controller – way to circulate water (or water plus antifreeze) For Closed Loop Applications using internal, variable speed water flow control. The This is the most common configuration for closed factory installed high efficiency variable speed pumps loops.
  • Page 25 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: vFlow Heat Pump Applications Overview 024-060 WATER PRESSURE SCHRADER PORTS Typical Open Loop Application (Shown with Internal Modulating Motorized Valve) The pressure ports built in to the unit are provided as a means of measuring pressure drop through the water-to-refrigerant heat exchanger.
  • Page 26 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: vFlow Heat Pump Applications Overview 024-060 Standard Head Variable Pump Performance No Check Valve With Check Valve Flow Rate (gpm) High Head Variable Pump Performance No Check Valve With Check Valve Flow (gpm) PA G E : 2 6 P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 w w w.

  • Page 27: Ground-Loop Heat Pump Applications

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Loop Heat Pump Applications 024-060 FLUSHING THE GROUND LOOP CAUTION The following instructions represent industry accepted installation Upon completion of system installation and testing, practices for closed loop earth coupled heat pump systems. Instructions flush the system to remove all foreign objects and are provided to assist the contractor in installing trouble free ground loops.
  • Page 28 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Loop Heat Pump Applications 024-060 Figure 12: Typical Closed Loop with Central Pumping (Shown with internal modulating water valve) To Thermostat Internal Motorized Modulating Valve Water Out Water In High and Low Voltage Shut Off Knockouts Ball Valves...

  • Page 29: Ground-Loop Cleaning And Flushing

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Loop Cleaning and Flushing 024-060 Once piping is completed between the unit and the WARNING ground loop, final purging and charging of the loop DISCONNECT ELECTRICAL POWER SOURCE TO PRE- is needed. VENT INJURY OR DEATH FROM ELECTRICAL SHOCK. A flush cart (at least a 1.5 hp [1.1 kW] pump) is needed Figure 14: Typical Cleanable Flush Cart Strainer to achieve adequate flow velocity in the loop to...
  • Page 30 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground Loop Cleaning and Flushing Actual area is 3.5313” w x 8.875”h 024-060 Guides indicate .125” bleed all around UNIT FILL Figure 16: Valve Position A – Loop Fill/Flush Unit fill valves should be switched to Position B while flush cart is pumping to fill the unit heat exchanger (see Figure 17).
  • Page 31 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Actual area is 3.5313” w x 8.875”h Ground Loop Cleaning and Flushing 024-060 Guides indicate .125” bleed all around Figure 18: Valve Position C – Full Flush Loop static pressure will fluctuate with the seasons and pressures will be higher in the winter months than during the cooling season.

  • Page 32: Ground-Loop Antifreeze Charging

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Loop Antifreeze Charging 024-060 GROUND-LOOP ANTIFREEZE CHARGING Calculate the amount of antifreeze required by first calculating the total fluid volume of It is highly recommended to utilize premixed the loop from Table 3. Then calculate the antifreeze fluid where possible to ensure proper amount of antifreeze needed using Table 4 for concentration levels.
  • Page 33 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Actual area is 3.5313” w x 8.875”h Actual area is 3.5313” w x 8.875”h Models: Actual area is 3.5313” w x 8.875”h Ground-Loop Antifreeze Charging Guides indicate .125” bleed all around Guides indicate .125” bleed all around Guides indicate .125”...

  • Page 34: Multiple-Unit Piping And Flushing

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Multiple-Unit Piping and Flushing 024-060 Often projects require more than one heat pump. It may be possible to flush a multiple unit system Where possible, it makes sense for multiple units to through the unit’s flushing valves. Flushing pressure share a common ground loop.

  • Page 35: Unit Configuration

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Multiple-Unit Piping and Flushing 024-060 UNIT CONFIGURATION This type of application can generally be employed for systems up to 12 tons depending on loop design. Multiple vFlow units with internal variable-speed However, it is important to perform appropriate flow controller and check valve, piped in parallel calculations to confirm that the variable speed pump sharing a common loop MUST be configured for ‘VS...
  • Page 36 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Multiple-Unit Piping and Flushing 024-060 pump and that backward flow the unit is not possible. Figure 25: Multiple Units with Internal Flow Controllers and External Flushing Valves Multiple Units with Internal Flow Controllers and Common Flushing Ports Ground Loop Size for Heat Pump Shut-Off Valve...

  • Page 37: Ground-Water Heat Pump Applications

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Water Heat Pump Applications 024-060 OPEN LOOP: GROUND WATER SYSTEMS WARNING Polyolester Oil, commonly known as POE oil, is a synthetic oil used in many Typical open loop piping is shown in accompanying refrigeration systems including those with R-454B refrigerant.
  • Page 38 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Ground-Water Heat Pump Applications 024-060 FLOW REGULATION: UNITS WITHOUT vFLOW Figure 27: Typical Open Loop/Well (shown with internal modulating water valve) Flow regulation can be accomplished by two methods. One method of flow regulation involves simply adjusting the ball valve or water control valve on the discharge line.

  • Page 39: Water Quality Requirements

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Water Quality Requirements 024-060 Table 5: Water Quality Requirements Clean water is essential to the performance and life span of water source heat pumps. Contaminants, chemicals, and minerals all have the potential to cause damage to the water heat exchanger if not treated properly.
  • Page 40 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Water Quality Requirements 024-060 α The Water Quality table provides water quality Hydrogen Sulfide has an odor of rotten eggs. requirements for coaxial and brazed-plate If one detects this smell, a test for H S must be heat exchangers.
  • Page 41 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Actual area is 7.25” w x 8.875”h Models: Water Quality Requirements Guides indicate .125” bleed all around 024-060 Measuring Earth Ground Resistance for Ground-Water Applications � 0.02 Building Well Casing Ground Rod Ohm meter Measure the earth ground bond using an Ohm meter between the building’s ground rod and the steel well casing.
  • Page 42 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Actual area is 7.25” w x 8.875”h Models: Water Quality Requirements Guides indicate .125” bleed all around 024-060 Measuring Electrolysis, Voltage, and Current for Ground-Water Applications 300mV Heat Pump Volt Meter Wire Electrode inserted into port for Voltage Measurement Pete’s Port Water in...

  • Page 43: Hot Water Generator

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Hot Water Generator 024-060 The Hot Water Generator (HWG) or desuperheater Using a 125°F setpoint, the HWG can heat the lower option provides considerable operating-cost savings 40 gallons of water from 100°F to 125°F, providing up by utilizing heat energy from the compressor to 8,330 btu’s of heat.

  • Page 44: Installation

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Hot Water Generator 024-060 Figure 30: Two-tank HWG Installation If the control detects a HWG fault, the DXM2.5 status LED flashes a numeric fault code as follows: Shut-o Cold Inlet from Domestic Supply Hot Outlet Valve #4 to House...
  • Page 45 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Hot Water Generator 024-060 Hot Water Generator settings are determined by The heat pump, water piping, pump, and hot water tank DIP switches 3-2, 3-3, and 3-4. should be located where the ambient temperature does not fall below 50°F (10°C).

  • Page 46: Initial Start-Up

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Hot Water Generator 024-060 WATER TANK REFILL INITIAL STARTUP Close valve #4. Ensure that the HWG valves Make sure all valves in the HWG water circuit (valves #2 and #3) are open. Open the cold are fully open.

  • Page 47: Electrical Data: Cv Ec Blower Motor

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical Data: CV EC Blower Motor 024-060 Units without Internal Flow Controller Compressor Pump Total Voltage Voltage Fuse Model Voltage Motor Unit Circ Fuse Code Min/Max HACR Calc’d SZ*024 G.J. 208/230-1-60 187/252 16.0 10.3 62.0 0.28...

  • Page 48: Electrical: Power Wiring

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: Power Wiring 024-060 POWER CONNECTION WARNING Disconnect electrical power source to prevent injury or death from Line voltage connection is made by connecting electrical shock. the incoming line voltage wires to the “L” side of CAUTION the contactor as shown in the unit wiring diagram.

  • Page 49: Electrical: Dxm2.5 Example Wiring Diagram

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: DXM2.5 Example Wiring Diagram 024-060 NOTES: Field Use Only: Transformer wiring is voltage-sensitive. Use layout corresponding to the unit voltage. Typical heat-pump thermostat wiring shown. Refer to thermostat IOM for wiring to the unit. Thermostat wiring must be “Class I” and voltage rating equal to or greater than unit supply voltage.

  • Page 50: Electrical: Low-Voltage Wiring

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: Low-Voltage Wiring 024-060 THERMOSTAT CONNECTIONS Therefore, LT1 is sensing refrigerant temperature, not water temperature, which is a better indication of The thermostat should be wired directly to the how water flow rate/temperature is affecting the DXM2.5 board.

  • Page 51: Accessory Connections

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: Low-Voltage Wiring 024-060 ACCESSORY CONNECTIONS Figure 35: Accessory Wiring P2 Terminal Strip A terminal paralleling the compressor contactor coil has been provided on the DXM2.5 control. Terminal “A” is designed to control accessory devices. NOTE: Typical Water This terminal should be used only with 24V signals...
  • Page 52 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Electrical: Low Voltage Wiring for non-vFlow® Units Models: Using External Motorized Water Valve 024-060 Figure 36: Accessory Motorized Water Valve Figure 38: Two-Stage Piping without vFlow Typical Wiring Example #1 Solenoid Flow Valve Regulator Unit Controller Stage 2...
  • Page 53 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: Low Voltage Wiring 024-060 REFRIGERANT DETECTION SYSTEM (RDS) FIELD-INSTALLED RDS SYSTEM The function, operation, and required servicing If an RDS is optionally being field-installed on measures for the RDS include the following: non-ducted horizontal units in sizes 006-048, use the following guidelines to install the refrigerant The RDS monitors the status of the refrigerant...

  • Page 54: Electrical: Thermostat Wiring

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Electrical: Thermostat Wiring 024-060 THERMOSTAT INSTALLATION The thermostat should be located on an interior Mark the position of the back plate mounting holes wall in a larger room, away from supply duct and drill holes with a 3/16-inch (5 mm) bit. Install drafts.

  • Page 55: Blower Performance Data

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Blower Performance Data 024-060 CV EC MOTOR ADVANTAGE A major benefit of the CV EC motor over other blower motor types is its ability to adjust airflow remotely through the iGate 2 web portal/mobile app or directly at the unit with a communicating diagnostic service tool. Airflow levels can be adjusted in increments of 25 CFM from the unit’s minimum and maximum CFM range (see the Blower Performance: CV EC Blower Motor Standard Unit table for details).

  • Page 56: Controls: Dxm2.5

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Controls: DXM2.5 024-060 DXM2.5 Controls For detailed controller information, see the DXM2.5 Application, Operation, and Maintenance (AOM) manual (part # 97B0142N01). To confirm the controller type of your particular unit, refer to digit 9 on the unit model number and the unit nomenclature diagram found on page 3 of this manual.

  • Page 57: Operating And Commissioning Limits

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Operating and Commissioning Limits 024-060 OPERATING LIMITS COMMISSIONING CONDITIONS Environment – Units are designed for indoor Starting conditions vary depending upon model and installation only. Never install units in areas subject are based upon the following notes: to freezing or where humidity levels could cause NOTES: cabinet condensation (such as unconditioned...

  • Page 58: Unit System Checkout

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit System Checkout 024-060 Unit air coil and filters: Ensure filter is clean and † WARNING accessible. Clean air coil of all manufacturing oils. Polyolester Oil, commonly known as POE oil, is a synthetic oil used in many refrigeration systems including those with R-454B refrigerant.

  • Page 59: Unit Startup Procedure

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Startup Procedure 024-060 UNIT STARTUP PROCEDURE compared to submittal data capacity pages. The formula for HR for systems with water is Turn the thermostat fan position to “ON”. The as follows: blower should start. HR (Btuh) = TD x GPM x 500, 2.
  • Page 60 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Startup Procedure 024-060 and compared to submittal data capacity WARNING pages. The formula for HE for systems with When the disconnect switch is closed, high voltage is present in some water is as follows: areas of the electrical panel.

  • Page 61: Unit Operating Conditions

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Operating Conditions 024-060 Table 9: SZ Coax Water Pressure Drop WARNING When the disconnect switch is closed, high voltage is present in some Pressure Drop (psi) Model areas of the electrical panel. Exercise caution when working with 30°F* 50°F 70°F...
  • Page 62 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Operating Conditions 024-060 Operating Pressure/Temperature tables include the following notes: Airflow is at nominal (rated) conditions Entering air is based upon 70°F (21°C) DB in heating and 80/67°F (27/19°C) DB/WB in cooling Subcooling is based upon head pressure at compressor service port Cooling air and water values can vary greatly with changes in humidity level Table 10: SZ Series Typical Unit Operating Pressures and Temperatures...
  • Page 63 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Operating Conditions 024-060 SZ036 Full Load Cooling - without HWG active Full Load Heating - without HWG active Water Discharge Suction Water Discharge Suction Water Superheat Subcooling Temp Superheat Subcooling Temp EWT °F Flow Pressure Pressure...
  • Page 64 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Unit Operating Conditions 024-060 SZ048 Full Load Cooling - without HWG active Full Load Heating - without HWG active Water Discharge Suction Water Discharge Suction Water Superheat Subcooling Temp Superheat Subcooling Temp EWT °F Flow Pressure Pressure...

  • Page 65: Performance Data

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*024 EC Blower Motor (Full Load) 024-060 800 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 10.1 15.7 1.45 10.5 16.5 17.4 1.48 12.1 21.9 28.1 20.1...
  • Page 66 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*030 EC Blower Motor (Full Load) 024-060 900 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 13.8 20.9 1.93 14.0 16.3 22.8 1.98 15.8 21.7 33.8 22.9...
  • Page 67 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*036 EC Blower Motor (Full Load) 024-060 1150 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 12.1 25.1 2.26 17.0 16.2 27.4 2.32 19.2 21.5 40.0 28.3...
  • Page 68 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*042 EC Blower Motor (Full Load) 024-060 1350 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 10.5 11.2 27.7 2.78 17.8 16.6 30.1 2.85 19.9 22.4 47.2...
  • Page 69 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*048 EC Blower Motor (Full Load) 024-060 1550 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 12.0 12.1 33.3 3.03 22.5 16.2 36.5 3.13 25.4 21.5 53.3...
  • Page 70 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Performance Data Models: SZ*060 EC Blower Motor (Full Load) 024-060 1900 CFM Rated Airflow COOLING - EAT 80/67°F HEATING - EAT 70°F °F Operation Not Recommended 15.0 20.7 38.8 3.58 26.1 16.5 42.3 3.65 29.3 22.2 65.3...
  • Page 71 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Full Load Performance: Models: Correction Tables 024-060 Cooling Correction Sensible Cooling Capacity Multipliers - Entering DB ºF Entering Total Heat of Power Air WB ºF Capacity Rejection 0.651 0.927 0.723 0.730 0.944 0.786 0.809 0.960 0.849 0.889...

  • Page 72: Preventative Maintenance

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Preventative Maintenance 024-060 WATER COIL MAINTENANCE COMPRESSOR (WATER LOOP APPLICATIONS) Conduct annual amperage checks to ensure that amp draw is no more than 10% greater than Generally water coil maintenance is not needed for indicated on the serial dataplate.

  • Page 73: Troubleshooting

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Troubleshooting 024-060 GENERAL SENSOR INPUTS If operational difficulties are encountered, perform All sensor inputs are ‘paired wires’ connecting each the preliminary checks below before referring to the component to the board. Therefore, continuity on troubleshooting charts.

  • Page 74: Advanced Diagnostics

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Troubleshooting 024-060 ADVANCED DIAGNOSTICS If a communicating thermostat or diagnostic tool (ACDU) is connected to the DXM2.5, additional diagnostic information and troubleshooting capabilities are available. The current status of all DXM2.5 inputs can be verified, including the current temperature readings of all temperature inputs.

  • Page 75: Dxm2.5 Functional Troubleshooting Flow Chart

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: DXM2.5 Functional Troubleshooting Flow Chart 024-060 WARNING HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death. DXM2.5 Functional Start Troubleshooting Flow Chart Did Unit...

  • Page 76: Functional Troubleshooting

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Functional Troubleshooting 024-060 Fault Htg Clg Possible Cause Solution Check line voltage circuit breaker and disconnect. Check for line voltage between L1 and L2 on the contactor. Main power problems Green Status LED Off Check for 24VAC between R and C on CXM2/DXM2.5.
  • Page 77 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Functional Troubleshooting 024-060 Table continued from previous page Fault Htg Clg Possible Cause Solution Check power supply and 24VAC voltage before and during operation. Check power supply wire size. Under Voltage Over/Under Voltage Check compressor starting.
  • Page 78 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Functional Troubleshooting 024-060 Table continued from previous page Fault Htg Clg Possible Cause Solution Thermostat position Ensure thermostat set for heating or cooling operation. Unit locked out Check for lockout codes. Reset power. Only Fan Runs Compressor Overload Check compressor overload.

  • Page 79: Performance Troubleshooting

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Performance Troubleshooting 024-060 Symptom Htg Clg Possible Cause Solution Dirty filter Replace or clean. Check for dirty air filter and clean or replace. Reduced or no airflow in heating Check fan motor operation and airflow restrictions. Too high of external static? Check static vs.
  • Page 80 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Performance Troubleshooting 024-060 Table continued from previous page Symptom Htg Clg Possible Cause Solution Too high of airflow Check fan motor speed selection and airflow chart. Low Discharge Air Temperature in Heating Poor performance See ‘Insufficient Capacity’...

  • Page 81: Startup Log Sheet

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Startup Log Sheet Startup Log Sheet 024-060 Models: Small Packaged Units Ty, TZ 7300 S.W. 44th Street, Oklahoma City, OK 73179 • Phone: 1-800-299-9747 Installer: Complete Unit and System Checkout and follow Unit Startup Procedures in the IOM. Use this form to record unit information, temperatures, and pressures during startup.

  • Page 82: Functional Troubleshooting Form

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Troubleshooting Form Models: Packaged Water-to-Air Functional Troubleshooting Form 024-060 Customer: Loop Type: Startup Date: Actual area is 7.25” w x 4.5”h Model #: Serial #: Antifreeze Type: Guides indicate 0.125” bleed all around Complaint: Refrigerant: R-454B Operating Mode: Heating and Cooling Heating Position...

  • Page 83: Sample Warranties

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Sample Warranties Models: Standard 024-060 w w w. c l i m a t e m a s t e r. c o m P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 PA G E : 8 3...
  • Page 84 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Sample Warranties Models: Optional 10-Year Labor Coverage 024-060 PA G E : 8 4 P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 w w w.
  • Page 85 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Notes 024-060 w w w. c l i m a t e m a s t e r. c o m P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 PA G E : 8 5...
  • Page 86 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Notes 024-060 PA G E : 8 6 P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 w w w.
  • Page 87 TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Notes 024-060 w w w. c l i m a t e m a s t e r. c o m P a r t # : 9 7 B 0 0 7 5 n 3 6 | r e v i s e d : J a n u a r y 2 8 , 2 0 2 5 PA G E : 8 7...

  • Page 88: Revision History

    TranquiliTy® 24 (SZ) VerSaTile SerieS– ioM Models: Revision History 024-060 Date Section Description Minimum Installation Area Updated metric data Electrical Data: CV EC Blower Motor Updated data 01/28/25 Troubleshooting Form Updated form Warranty Updated sample warranties Updated naming conventions for DXM2.5, AWC Thermostat, and grounded Attentions, Cautions, and Warnings Added a notice that addresses powering off the unit while the RDS is active Updated footnote references, Updated model nomenclature...

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