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Troubleshooting
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Summary of Contents for Bosch TW Series
- Page 1 TW Series Water to Water Installation, Operation and Maintenance Manual...
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Page 2: Table Of Contents
2 | Table of contents TW Series Water to Water TABLE OF CONTENTS Auto Changeover Mode..........17 Unit Protection............17 Key to Symbols..............3 Manual Lockout..............18 Lead-Lag..............18 Safety Warnings..............3 Pump Cycling.............18 Model Nomenclature............4 Operating Instructions............18 Standard TW package ............5 User Interface............18... -
Page 3: Key To Symbols
TW Series Water to Water Key to Symbols | 3 KEY TO SYMBOLS SAFETY WARNINGS Warnings WARNING: Installation and servicing of this Warnings in this document are identified by equipment can be hazardous due to system a warning triangle printed against a grey pressure and electrical components. -
Page 4: Model Nomenclature
4 | Model Nomenclature TW Series Water to Water MODEL NOMENCLATURE 6720220047 (2016/02) Subject to change without prior notice TW Series Water to Water... -
Page 5: Standard Tw Package
INSTALLATION The TW series unit should be mounted level on a vibration absorbing pad slightly larger than the base to 50°F Minimum Entering Water Temperature (EWT) minimize vibration transmission to the building... -
Page 6: Piping
6 | Piping TW Series Water to Water PIPING ELECTRICAL Supply and return piping must be as large as the unit Refer to electrical component box layout. (Figure #3) connections on the heat pump (larger on long runs). NOTICE: Field wiring must comply with local and national electric codes. -
Page 7: Safety Devices And The Upm Controller
(ALR) contact on the unit’s UPM board. The TW Series has an optional factory installed Unit Protection Module (UPM) that controls the compressor operation and monitors the safety controls that protect the unit. - Page 8 8 | Electrical TW Series Water to Water • MALFUNCTION OUTPUT: Alarm output is Normally Open (NO) dry contact. If pulse is selected the alarm UPM Board Factory Default Settings output will be pulsed. The fault output will depend on the dip switch setting for "ALARM". If it is set to TEMP 26°F...
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Page 9: Options
The heat recovery package is a factory installed option compressor operation. This relay can be used to switch on TW series heat pumps. The HRP can be used to heat either high or low voltage power. potable water during unit operation using waste heat from the compressor discharge gas. -
Page 10: Heat Recovery Package
10 | Heat Recovery Package TW Series Water to Water By monitoring and analyzing data from the compressor Depress the hot water tank pressure relief valve and the thermostat demand, the module can accurately handle to ensure there is no air remaining in the detect the cause of electrical and system related failures tank. -
Page 11: Sequence Of Operation
TW Series Water to Water Sequence of operation | 11 NOTE: Diagram for illustration purposes only. Ensure access to Heat Pump is not restricted. Figure # 7 SEQUENCE OF OPERATION Cooling Mode Energizing the “O” terminal energizes the unit reversing valve thus placing the unit into cooling mode. -
Page 12: Sequence Of Operation Flow
12 | Sequence of Operation flow TW Series Water to Water SEQUENCE OF OPERATION FLOW START RESET ON R RESET ON Y1 = ON R = 24VAC POWER/ SWITCHES/SENSOR CLEAR FAULTS STATUS CHECK BLINK CODE ON STATUS LED COUNTER SOFT LOCKOUT V >... -
Page 13: Application Considerations
TW Series Water to Water Application Considerations | 13 APPLICATION CONSIDERATIONS exchanger. This can be accomplished with either control valve or a bladder type expansion tank. When using a Well Water Systems single water well to supply both domestic water and the... -
Page 14: Geothermal Systems
14 | Application Considerations TW Series Water to Water Ball valves should be installed in the supply and return lines for unit isolation and unit water flow balancing. NOTICE: Water piping exposed to extreme Pressure/temperature ports are recommended in both low ambient temperatures is subject to supply and return lines for system flow balancing. -
Page 15: System Checkout
TW Series Water to Water System Checkout | 15 Figure # 11 [1] Polybutylene or Polyethelene with insulation Verify that vibration isolation has been provided. [2] Ground loop pumping package (GLP) Unit is serviceable. Be certain that all access panels are secured in place. -
Page 16: Unit Start-Up
WATER TO WATER UNIT CONTROLLER this time. Thereafter the display will switch to the Bosch water heat pump controller offers a low cost, monitored water temperature. When switching from one simple solution to the control of a water to water heat mode to another the set point (the decimal point is used pump unit. -
Page 17: Cooling Mode
TW Series Water to Water Modes Of Operation | 17 Auto Changeover Mode The control will first display temperature differential setting with the ability for the user to adjust it and then The controller’s auto change over mode control feature will display “OFF”... -
Page 18: Manual Lockout
18 | Manual Lockout TW Series Water to Water Brownout Protection Pump cycling The control will disable all outputs if the supply When ordered with the optional pump relay the voltage drops below 17 VAC. The outputs will be controller will cycle either the load, source or both enabled if the supply voltage rises and remains pumps with the compressor operation. -
Page 19: Led Indicators
TW Series Water to Water User Adjustable Settings Chart | 19 pressing again will decrement the set point 1 Settings Range Default degree for every push. Pressing and holding the down button will decrement the set point at a LEAD LAG 0-14 Days rate of 4 degrees per second. -
Page 20: Initial Configuration
20 | Initial Configuration TW Series Water to Water Fourth display field cooling only, or auto change modes. The mode button is pushed until the circular LED is lit next to Auto change over set point (S2). Adjustable from 55 to the chosen control mode. -
Page 21: Unit Check-Out Sheet
TW Series Water to Water Unit Check-Out Sheet | 21 UNIT CHECK-OUT SHEET Customer Data Customer Name _____________________________________________ Date ___________________________________ Address ______________________________________________________ _______________________________________________________________ Phone _______________________________________________________ Unit Number ___________________________ Unit Nameplate Data Unit Make _________________________________________ Model Number ____________________________________ Serial Number ____________________________________... -
Page 22: Troubleshooting
22 | Troubleshooting TW Series Water to Water TROUBLESHOOTING Troubleshooting Information Solution column may reflect a possible fault that may be one of, or a combination of causes and solutions. Check each cause and adopt “process of elimination” and or verification of each before making any conclusion. -
Page 23: Confort Alert Module-Flash Codes
TW Series Water to Water Troubleshooting | 23 Unit Troubleshooting Problem Possible Cause Checks and Correction INSUFFICIENT Unit undersized Recalculate heating and or cooling loads. If excessive, possibly adding COOLING OR insulation and shading will rectify the problem HEATING fluid flow Lack of adequate fluid flow. -
Page 24: Hrp Troubleshooting
24 | Troubleshooting TW Series Water to Water Comfort Alert Module - Flash Codes Status LED Status LED Description Status LED Troubleshooting Information Solution YELLOW "ALERT” Open Start Circuit Run capacitor has failed (may not be bad, verify) FLASH CODE 6... -
Page 25: Electrical Data Table
TW Series Water to Water Troubleshooting | 25 ELECTRICAL DATA TABLE Compressor Voltage Voltage Rated Min/ Circuit Fuse/ Models Code Voltage Amps HACR TW025 208-230/60/1 197/253 11.7 58.3 14.6 TW035 208-230/60/1 197/253 15.3 83.0 19.1 TW049 208-230/60/1 197/253 21.2 104.0 26.5... -
Page 26: Water Quality Table
26 | Water Quality Table. TW Series Water to Water WATER QUALITY TABLE. Table 1: Water Quality POTENTIAL Water Characteristic Acceptable Value PROBLEM Copper Cupro-Nickel pH (Acidity/Alkalinity) SCALING Hardness (CaCO3, < 350 ppm < 350 ppm MgCO3) Ryznar Stability Index 6.0 - 7.5... -
Page 27: Wiring Diagrams
TW Series Water to Water Wiring Diagrams | 27 WIRING DIAGRAMS Figure # 13 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-16 6720220047 (2016/02) - Page 28 28 | Wiring Diagrams TW Series Water to Water Figure # 14 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6720220047 (2016/02) Subject to change without prior notice...
- Page 29 TW Series Water to Water Wiring Diagrams | 29 Figure # 15 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-16 6720220047 (2016/02)
- Page 30 30 | Wiring Diagrams TW Series Water to Water Figure # 16 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6720220047 (2016/02) Subject to change without prior notice...
- Page 31 TW Series Water to Water Wiring Diagrams | 31 Figure # 17 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. Revised 02-16 6720220047 (2016/02)
- Page 32 32 | Wiring Diagrams TW Series Water to Water Figure # 18 FOR REFERENCE ONLY Actual unit wiring may vary from this example. Always refer to the wiring diagram attached to the unit. 6720220047 (2016/02) Subject to change without prior notice...
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Page 33: Dimensional Drawings
TW Series Water to Water Dimensional Drawings | 33 DIMENSIONAL DRAWINGS Revised 02-16 6720220047 (2016/02) - Page 34 34 | TW Series Water to Water 6720220047 (2016/02) Subject to change without prior notice TW Series Water to Water...
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Page 35: Terminology
TW Series Water to Water Terminology | 35 TERMINOLOGY involving a part containing or designed to contain such PSC - Permanent-split capacitor motor gases; EER - Energy Efficiency Ratio Conditioned space-Space within a building provided with heated or cooled air, or both (or surfaces); and, COP - Coefficient of Performance. - Page 36 Bosch Thermotechnology Corp. 555 N.W. 65th Court, Ft. Lauderdale, FL 33309 Phone: 866-642-3198 | Fax: 954-776-5529 www.boschheatingandcooling.com Revised 02-16...