Nibe ClimateMaster Tranquility 22 Digital TZ Series Installation, Operation & Maintenance Instructions Manual
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Nibe ClimateMaster Tranquility 22 Digital TZ Series Installation, Operation & Maintenance Instructions Manual

Nibe ClimateMaster Tranquility 22 Digital TZ Series Installation, Operation & Maintenance Instructions Manual

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®
Tranquility

Table of Contents

3
4
Wiring Diagrams
5
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7
10
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17
20
22
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25
29
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33
Residential Horizontal & Vertical
Packaged Geothermal Heat Pumps
Installation, Operation &
Maintenance Instructions
22 Digital
®
( TZ ) Series
97B0072N11
Rev.: November 18, 2022
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Summary of Contents for Nibe ClimateMaster Tranquility 22 Digital TZ Series

  • Page 1: Table Of Contents

    Tranquility 22 Digital ® ( TZ ) Series 97B0072N11 Residential Horizontal & Vertical Packaged Geothermal Heat Pumps Installation, Operation & Maintenance Instructions Rev.: November 18, 2022 Table of Contents Model Nomenclature Electrical – Thermostat Wiring and Auxiliary Heat Safety Wiring Diagrams General Information Constant Volume (CV) ECM Vertical Installation...
  • Page 2 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 This page was intentionally left blank. G e o t h e r m a l H e a t i n g a n d C o o l i n g...

  • Page 3: Model Nomenclature

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Model Nomenclature: General Overview 4 5 6 0 2 4 2 C V T STANDARD SERIES S = Standard...

  • Page 4: Safety

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Safety SAFETY CAUTION: Indicates a potentially hazardous situation or an Warnings, cautions and notices appear throughout this unsafe practice, which if not avoided could result in minor or manual.

  • Page 5: General Information

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 General Information ⚠ ⚠ INSPECTION CAUTION! Upon receipt of the equipment, carefully check the shipment against the bill of lading.

  • Page 6: Vertical Installation

    duct flanges. 22 Digital ( TZ Tranquility Series - 60Hz ® Rounded return transition R e v . : N o v e m b e r 1 8 , 2 0 2 2 Rev.: 6/2/09S Vertical Installation Internally insulate return transition duct to reduce noise VERTICAL UNIT LOCATION...

  • Page 7: Horizontal Installation

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Horizontal Installation HORIZONTAL UNIT LOCATION MOUNTING HORIZONTAL UNITS Packaged units are not designed for outdoor installation. Horizontal units have 4 hanger brackets partially attached Locate the unit in an INDOOR area that allows enough space at the factory, one at each corner.
  • Page 8 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Horizontal Installation, Cont’d. HORIZONTAL INSTALLATION Figure 5: Horizontal Unit Pitch Figure 3: Typical Horizontal Unit Installation with Internal Flow Controller 1/4”...
  • Page 9 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Horizontal Installation, Cont’d. Field Conversion of Air Discharge Figure 7: Left Return Side to Back Remove Screws Water Connection End...

  • Page 10: Condensate And Water Connection

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Condensate and Water Connection CONDENSATE PIPING WATER CONNECTIONS Pitch the unit toward the drain as shown in Figure 6 to Swivel piping fittings are used for water connections that improve the condensate drainage.

  • Page 11: Vflow ® Heat Pump Applications Overview

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 vFlow vFlow Heat Pump Applications Overview Heat Pump Applications Overview ® ®...

  • Page 12: Closed Loop Heat Pump Applications W/Internal Flow Controller

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Closed Loop Heat Pump Applications w/Internal Flow Controller Units with internal flow control come with a built-in variable Figure 12: Internal Flow Controller speed pump, an expansion tank, flushing ports and three- way valves (used to flush the unit).
  • Page 13 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Closed Loop Heat Pump Applications w/Internal Flow Controller, Cont’d. Figure 13: Standard Head Variable Pump Performance No Check Valve With Check...

  • Page 14: Flushing The Earth Loop

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Flushing the Earth Loop ⚠ ⚠ WARNING! Once piping is completed between the unit and the ground loop, final purging and charging of the loop is needed.
  • Page 15 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Flushing the Earth Loop, Cont’d. Figure 15b: Valve Position B – Unit Fill/Flush NOTICE: Actual flushing time require will vary for each installation due to piping length, configuration, and flush cart pump capacity.
  • Page 16 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Flushing the Earth Loop, Cont’d. Loop static pressure will fluctuate with the seasons and pressures will be higher in the winter months than during the cooling season.

  • Page 17: Multiple Unit Piping And Flushing

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Multiple Unit Piping and Flushing Often projects require more than one heat pump. Where For example, if a system includes two 2-ton units and four possible, it makes sense for multiple units to share a common ¾...
  • Page 18 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Multiple Unit Piping and Flushing, Cont’d. MULTIPLE UNITS WITH INTERNAL FLOW CONTROLLERS The simplest multiple unit system is one with two (or more) units utilizing internal Flow Controllers with no external pumps or flushing valves.
  • Page 19 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Multiple Unit Piping and Flushing, Cont’d. Multiple Units with Internal Flow Controllers and Common Flushing Ports Figure 16b: Multiple Units with Internal Flow Controllers and External Flushing Valves Ground Loop Size for Heat Pump...

  • Page 20: Ground-Loop Heat Pump Applications

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Ground-Loop Heat Pump Applications ⚠ ⚠ ANTIFREEZE SELECTION - GENERAL WARNING! In areas where minimum entering loop temperatures drop below 40°F [4.4°C] or where piping will be routed WARNING! Always use properly marked vehicles (D.O.T.
  • Page 21 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Ground Loop Heat Pump Applications, Cont’d. cart noting the color of the discharge fluid. Adding food Chart 1a: Methanol Specific Gravity coloring to the antifreeze can help indicate where the 1.000...

  • Page 22: Closed Loop - External Central Pumping Applications

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Closed Loop – External Central Pumping Applications Figure 17: Typical Closed Loop with Central Pumping Application (with Internal Modulating Motorized Valve Shown) To Thermostat Internal Motorized Modulating Valve...

  • Page 23: Open Loop Or Ground-Water Heat Pump Applications

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Open Loop or Ground-Water Heat Pump Applications Figure 19: Typical Open Loop/Well Application OPEN LOOP –...
  • Page 24 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Open Loop or Ground-Water Heat Pump Applications, Cont’d. PRESSURE TANK AND PUMP WATER COIL LOW TEMPERATURE LIMIT SETTING Use a closed, bladder-type pressure tank to minimize For all open loop systems the 30°F [-1.1°C] LT1 setting...

  • Page 25: Water Quality Requirements

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Water Quality Requirements 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 26 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Water Quality Requirements, Cont’d. The ClimateMaster Water Quality Table provides water Hydrogen Sulfide has an odor of rotten eggs.
  • Page 27 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Water Quality Requirements, Cont’d. Measuring Earth Ground Resistance � 0.02 Well Casing Building Ground Rod OHM meter...
  • Page 28 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Water Quality Requirements, Cont’d. Measuring Electrolysis Voltage and Current 300mV Heat Pump Volt Meter Wire Electrode inserted into port for Voltage measurement...

  • Page 29: Hot Water Generator

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Hot Water Generator The HWG (Hot Water Generator) or desuperheater option Using a 125°F set point, the HWG can heat the lower 40 provides considerable operating cost savings by utilizing gallons of water from 100°F to 125°F, providing up to 8,330...
  • Page 30 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Hot Water Generator, Cont’d. INSTALLATION Figure 22: Anti-Scald Valve Piping Connections The HWG is controlled by two sensors and the DXM2.5 ANTI-SCALD COLD WATER...
  • Page 31 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Hot Water Generator, Cont’d. ⚠ ⚠ Depress the hot water tank pressure relief valve handle WARNING! to ensure that there is no air remaining in the tank.

  • Page 32: Electrical - Line Voltage

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Electrical – Line Voltage ⚠ ⚠ ⚠ ⚠ WARNING! WARNING! WARNING! Disconnect electrical power source to prevent WARNING! To avoid possible injury or death due to injury or death from electrical shock.

  • Page 33: Electrical - Low Voltage Wiring

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Electrical – Low Voltage Wiring Figure 25: Tranquility Low Voltage Field Wiring Table 9: Accessory Relay 1 Configuration ®...

  • Page 34: Electrical - Thermostat Wiring And Auxiliary Heat

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Electrical – Thermostat Wiring and Auxiliary Heat Figure 24a: Communicating Thermostat Thermostat Installation Figure 26a: iGate 2 Communicating (AWC) Thermostat...
  • Page 35 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 DXM2.5 Wiring Diagram w/Internal Flow Controller – 96B0005N60 This diagram includes typical wiring details but is not applicable to all units. For specific unit wiring, refer to the diagram or the units’...
  • Page 36 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 DXM2.5 Wiring Diagram w/Motorized Modulating Water Valve – 96B0005N62 G e o t h e r m a l H e a t i n g a n d C o o l i n g...

  • Page 37: Constant Volume (Cv) Ecm

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Constant Volume ( CV ) ECM The Intelligent Constant Volume (CV) ECM The fan motor operating modes include: blower motor...

  • Page 38: Blower Performance Data

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Blower Performance Data Table 11: Tranquility 22 (TZ) Series CV ECM Blower Performance Data Table ®...

  • Page 39: Controls - Dxm2.5

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Controls – DXM2.5 DXM2.5 CONTROLS For detailed control information, see the DXM2.5 Application, Operation, and Maintenance (AOM) manual (part # 97B0142N01).

  • Page 40: Operating & Commissioning Limits

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Operating & Commissioning Limits OPERATING LIMITS COMMISSIONING LIMITS Environment – Units are designed for indoor installation Consult Table 9b for commissioning limits.

  • Page 41: Unit & System Checkout

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit & System Checkout ⚠ ⚠ ⚠ ⚠ CAUTION! CAUTION! CAUTION! Verify that ALL water valves are open and CAUTION! To avoid equipment damage, DO NOT allow water flow prior to engaging the compressor.

  • Page 42: Unit Start-Up Procedure

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit Start-Up Procedure MANUAL OPERATING MODE UNIT START-UP PROCEDURE Turn the thermostat fan position to “ON.” Blower COMM OUTPUT should start.
  • Page 43 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit Start-Up Procedure, Cont’d. Heat of Extraction (HE) can also be calculated and compared Water Flow, gpm (l/m) Drop, Heating °F to the performance data pages in this IOM.

  • Page 44: Unit Operating Conditions

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit Operating Conditions Table 13: TZ Coax Water Pressure Drop Table 14: Water Temperature Change Through Heat Exchanger Pressure Drop (psi) Rise, Drop,...
  • Page 45 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit Operating Conditions, Cont’d. Table 16: TZ Series Typical Unit Operating Pressures and Temperatures Full Load Cooling - without HWG active Full Load Heating - without HWG active Water...
  • Page 46 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Unit Operating Conditions, Cont’d. Table 16, Cont’d.: TZ Series Typical Unit Operating Pressures and Temperatures Full Load Cooling - without HWG active Full Load Heating - without HWG active Water...

  • Page 47: Performance Data

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 024 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 48 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 024 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 49 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 030 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 50 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 030 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 51 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 036 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 52 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 036 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 53 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 042 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 54 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 042 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 55 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 048 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 56 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 048 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 57 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 060 Part Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.
  • Page 58 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Data – Model 060 Full Load with vFlow ® Antifreeze use recommended in this range. Performance capacities shown in thousands of Btuh Also Clip JW3 on DXM2.5 board.

  • Page 59: Preventive Maintenance

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Preventive Maintenance WATER COIL MAINTENANCE CONDENSATE DRAIN (Direct ground water applications only) In areas where airborne bacteria may produce a “slimy”...

  • Page 60: Troubleshooting

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Troubleshooting GENERAL Table 17: Nominal resistance at various temperatures If operational difficulties are encountered, perform Resistance Resistance Temp (ºC) Temp (ºF)
  • Page 61 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Troubleshooting, Cont’d. OUTPUTS Fault Temp Conditions – This option displays the DXM2.5 The compressor and reversing valve relays are 24VAC temperature and voltage values when the lockout occurred.

  • Page 62: Dxm2.5 Functional Troubleshooting Flow Chart

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 DXM2.5 Functional Troubleshooting Flow Chart ⚠ ⚠ WARNING! WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING.

  • Page 63: Functional Troubleshooting

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Functional Troubleshooting Fault Htg Clg Possible Cause Solution Check line voltage circuit breaker and disconnect. Check for line voltage between L1 and L2 on the contactor.
  • Page 64 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Functional Troubleshooting, Cont’d. Table continued from previous page. Fault Htg Clg Possible Cause Solution Check power supply and 24VAC voltage before and during operation.

  • Page 65: Performance Troubleshooting

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Troubleshooting Symptom Htg Clg Possible Cause Solution Dirty filter Replace or clean. Check for dirty air filter and clean or replace.
  • Page 66 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Performance Troubleshooting, Cont’d. Table continued from previous page. Symptom Htg Clg Possible Cause Solution Check G wiring at heat pump.

  • Page 67: Troubleshooting Form

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Troubleshooting Form Refrigerant Circuit Diagram Packaged Water-to-Air RP929 Troubleshooting Form Customer: Loop Type: Startup Date: Model #:...

  • Page 68: Warranty

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Warranty G e o t h e r m a l H e a t i n g a n d C o o l i n g...
  • Page 69 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Notes: c l i m a t e m a s t e r . c o m...
  • Page 70 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Notes: G e o t h e r m a l H e a t i n g a n d C o o l i n g...
  • Page 71 22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Notes: c l i m a t e m a s t e r . c o m...

  • Page 72: Revision History

    22 Digital ( TZ Tranquility Series - 60Hz ® R e v . : N o v e m b e r 1 8 , 2 0 2 2 Revision History Date: Item: Action: Upgraded DXM2 to DXM2.5 unit controls and replaced the ATC thermostat with 18 Nov., 22 the AWC thermostat 05 Oct., 21...

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