1. Manuals
  2. Brands
  3. WattMaster Manuals
  4. Control Systems
  5. Water Source Heat Pump
  6. Installation & operation manual

WattMaster Water Source Heat Pump Installation & Operation Manual

Water source heat pump design
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
WHP - Water Source Heat Pump
Design, Installation &
Operations Manual
R e v i s i o n 0 2 A

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Water Source Heat Pump and is the answer not in the manual?

Questions and answers

Related Manuals for WattMaster Water Source Heat Pump

Summary of Contents for WattMaster Water Source Heat Pump

  • Page 1 WHP - Water Source Heat Pump Design, Installation & Operations Manual R e v i s i o n 0 2 A...
  • Page 3 WattMaster WHP Installation & Operations Manual Section 1... Design Guide Section 2... Installation and Wiring Section 3...Programming Section 4... Start-Up and Troubleshooting This document is subject to change without notice. WattMaster Controls, Inc. assumes no responsibility for errors, or omissions herein. WHP Installation &...

  • Page 5: Table Of Contents

    Proportional Heat Addition...13 Water Temperature Alarming ...14 Fire Alarm...14 Notes:... 16 Table of Figures Figure 1-1: Typical Water Source Heat Pump...3 Figure 1-2: Typical Water Source Heat Pump System ...3 Figure 1-3: Typical WattMaster WHP System...15 Section 1 Design Guide...

  • Page 7: Conventions

    WattMaster WHP Conventions This document uses the following definitions throughout as a guide to the user in determining the nature of the information presented: Note: Additional information which may be helpful. Tip: Suggestion to make installation, set-up, and troubleshooting easier. Caution: Items which may cause the equipment not to function correctly but will not otherwise damage components.

  • Page 8: General Information

    General Information Water Source Heat Pump Units A water source heat pump is a self-contained water-cooled packaged heating and cooling unit with a reversible refrigerant cycle. Its components are typically enclosed in a common casing, and include a tube-in-tube heat exchanger, a heating/cooling coil, a...

  • Page 9: Water Source Heat Pump Systems

    Water Source Heat Pump Systems The water source heat pump system is, by definition, a heat recovery system. It is best applied to buildings that have simultaneous cooling and heating loads. This is the case during winter months when the interior zones of a typical building require cooling while the exterior zones require heating.

  • Page 10: Wattmaster Whp Control System

    The packaged design of most unit types allows quick change-out by service personnel so maintenance can typically be performed off site. As with any HVAC system, there is a negative side as the water source heat pump system often requires higher maintenance costs than conventional air side systems. The system also typically has a shorter replacement life than other systems because of continuous fan and compressor operation during heating and cooling modes.

  • Page 11: Make Up Air Controller

    Prism’s features include graphics, trend logging, and remote alarm call out capabilities. WHP Loop Controller The Water Source Heat pump Loop Controller can be supplied with the system to control the water loop and its various pieces of equipment. The Loop Controller can operate...

  • Page 12: Whp Sequence Of Operation

    Section 1 WHP Sequence of Operation HVAC Mode of Operation There are four possible modes of operation. These are Cooling Mode, Heating Mode, Vent Mode, and the Off Mode. The HVAC mode of operation is calculated the same way in both occupied and unoccupied modes of operation. Off Mode The schedule is off and no overrides are active.

  • Page 13: Occupied/Unoccupied Mode Of Operation

    Section 1 WattMaster WHP Occupied/Unoccupied Mode of Operation Since the WHP contains its own built in Real Time Clock, it can operate from its own internal scheduling system. This schedule supports two Start & Stop events per day and up to 14 Holiday periods. The Holidays all use the same special Holiday Start/Stop times programmed by the user.

  • Page 14: Hvac Operation W/ Reversing Relay

    Section 1 HVAC Operation w/ Reversing Relay If the user has configured the WHP to control a Reversing Valve and a Compressor, the following sequence of operation occurs during a heating or cooling demand. Note: If you configure the WHP to look for a proof of flow Enable signal from the Loop Controller then the following sequence assumes a request was made by the WHP during a demand condition and that the Loop Controller gave permission for the WHP to start its compressor.

  • Page 15: Hvac Operation W/ Heat/Cool Relays

    WattMaster WHP HVAC Operation w/ Heat/Cool Relays If the user has configured the WHP to control Individual Heating and Cooling relays the following sequence of operation occurs during a heating or cooling demand. NOTE: If you configure the WHP to look for a proof of flow Enable signal from the Loop Controller then the following sequence assumes a request was made by the WHP during a demand condition and that the Loop Controller gave permission for the WHP to operate its heating or cooling.

  • Page 16: Whp Loop Controller Sequence Of Operations

    Sequence of Operations Summary The Water Source Heat Pump Loop Controller waits for a Request to Run signal from a Heat Pump or from a Binary Contact Closure. Once the request is received the Loop Controller activates a Pump to initiate water flow to the Heat Pumps. Once the pump is activated and proof of flow has been determined, a Global is broadcast to all Heat Pumps to enable them to go ahead and run their compressors.

  • Page 17: Pump Vfd Control

    Section 1 WattMaster WHP pump exceeds the first pumps run time by the same amount. This keeps both pumps with roughly the same number of hours on each pump. Changeover occurs at the time the run time setpoint is exceeded. The running pump is shut off at the same time the standby pump is energized, this prevents any down time or alarms.

  • Page 18: Heat Rejection Control

    Section 1 WattMaster WHP Heat Rejection Control If the compressor is not running, no heat rejection can be active. If any heat rejection is still active when the compressor is turned off, the heat rejection will be immediately removed, without regard to any minimum run or off times. Heat rejection cannot be active at the same time as heat addition, so any heat addition is removed or staged off before the heat rejection can be started.

  • Page 19: Staged Heat Addition

    Section 1 WattMaster WHP Staged Heat Addition Heat Addition is staged up based on a different deadband level for each stage. Basically, if the user programmed a 2° deadband, then the first stage could activate at the setpoint, stage 2 would activate 2° below the setpoint, stage 3 would activate 4° below the setpoint, etc...

  • Page 20: Water Temperature Alarming

    Section 1 WattMaster WHP Water Temperature Alarming The controlling water temperature is monitored to prevent it from exceeding both a user defined High and Low Alarm Limit. If either limit is exceeded for a user defined length of time, an alarm is generated and the compressor output is de-activated. If the high limit is exceeded, the heat addition outputs are de-activated and if the low limit is exceeded, the heat rejection outputs are de-activated.

  • Page 21: Figure 1-3: Typical Wattmaster Whp System

    WattMaster WHP COMPUTER (OPTIONAL) 110/24 VAC Power Pak Modem (Optional) L IN L IN K II K II CommLink II Multiple Loop Interface MiniLink Loop # 1 24VAC 24VAC 24VAC MiniLink Loop # 2 24VAC 24VAC 24VAC Typical Network & Local Loop Wiring 2 Conductor Twisted Pair with Shield (Beldon #82760 or Equivalent) MiniLink...

  • Page 22: Notes

    Section 1 WattMaster WHP Notes: 1-16 Design Guide...
  • Page 23 Section 2 Table of Contents Tips Before Beginning Installation... 1 Communications Loops ... 3 Communications Loop Wiring Overview...4 WHP Loop Controller ... 6 WHP Loop Controller Addressing ... 9 Supply & Return Water Temperature Sensors ... 10 Outside Air Temperature Sensor... 12 CommLink II Interface...
  • Page 24 Section 2 Table of Figures Figure 2-1: System Overview ...2 Figure 2-2: Communication Loop Wiring, Daisy-Chain Configuration ...4 Figure 2-3: WHP Loop Controller...6 Figure 2-4: WHP Loop Controller Wiring ...7 Figure 2-5: WHP Loop Controller Address Switch Setting ...9 Figure 2-6: Duct Sensor with Thermowell...10 Figure 2-7: Strap-On Water Temperature Sensor ...11 Figure 2-8: Outside Air Temperature Sensor ...12 Figure 2-9: CommLink Interface Wiring...14...

  • Page 25: Tips Before Beginning Installation

    WattMaster WHP Tips Before Beginning Installation Take a few moments to review the following before beginning installation of the WattMaster WHP System. Familiarize yourself with all system components and review all documentation. Pay special attention to “Cautions” and “Warnings” since these may keep you from experiencing unnecessary problems.
  • Page 26 Section 2 COMPUTER (OPTIONAL) 110/24 VAC Power Pak Modem (Optional) L IN L IN K II K II CommLink II Multiple Loop Interface MiniLink Loop # 1 24VAC 24VAC MiniLink Loop # 2 24VAC 24VAC Typical Network & Local Loop Wiring 2 Conductor Twisted Pair with Shield (Beldon #82760 or Equivalent) MiniLink...

  • Page 27: Communications Loops

    WattMaster WHP Communications Loops The Communications Loop is two wire shielded RS-485. The loop is best connected in daisy chain configuration, meaning the loop is connected from one controller to another. It is not necessary to sequentially address the WHP Controllers in relation to their location on the loop.

  • Page 28: Communications Loop Wiring Overview

    Section 2 Communications Loop Wiring Overview COMPUTER (OPTIONAL) Remote Link (OPTIONAL) COMM SHLD COMM LED1 LED2 +VRE F TE ST POINT VRE F A DJ INPUTS +VDC AIN1 AIN2 AIN3 AIN4 AIN5 AOUT1 AOUT2 AIN7 PRESSURE SENSOR EXPANSION NETWORK LOOP TO OTHER MINILINKS (NETWORK TERMINALS ONLY) Communication Loop Wiring, Daisy-Chain Configuration...
  • Page 29 WattMaster WHP The daisy chain is the best method for running a communications loop since there is only one starting point and one ending point for each of the communications loops. Even though the daisy chain configuration is preferred, the star configuration can also be used. If required, a combination of the two can also be used.

  • Page 30: Whp Loop Controller

    Section 2 WHP Loop Controller The WHP Loop Controller may be installed in any convenient protected location. It is recommended that the loop controller be mounted indoors in a secure location, that is not subject to extremes in temperature or moisture. .20 Dia.
  • Page 31 WattMaster WHP Connect To Next WHP Controller And/Or MiniLink On Local Loop Local Loop RS-485 9600 Baud Outside Air Temp. Sensor Return Water Temp Sensor Supply Water Temp Sensor See Note 4 Proof of Flow Optional Pressure Transmitter Manual Reset Phase Loss Pump VFD...
  • Page 32 Section 2 Warning: Polarity is very important when connecting power to the controllers! The grounded side of the control transformer must be connected to the terminal labeled GND on the controller. If a single transformer is used to power more than one controller you must connect GND-to- GND and 24VAC-to-24VAC on each observe polarity will result in damage to one or more components in your system.

  • Page 33: Whp Loop Controller Addressing

    WattMaster WHP WHP Loop Controller Addressing The WHP Loop Controller must be set for address #30. See address setting instructions for the WHP Loop Controller that follow. A maximum of 29 WHP Controllers are allowed on the loop that contains the WHP Loop Controller. All other loops may have 30 WHP Controllers.

  • Page 34: Supply & Return Water Temperature Sensors

    Section 2 Supply & Return Water Temperature Sensors Sensors for monitoring supply and return water temperature are available in two main types, fluid immersion temperature sensors (See Figure 2-6) and strap-on sensors (See Figure 2-7). Both are 0-10000 ohm thermistor type sensors. The fluid immersion sensor generally has better accuracy than the strap-on type but either is suitable for typical water source heat pump temperature requirements.
  • Page 35 WattMaster WHP The strap-on type sensor has a brass housing that senses the water temperature through contact with the exterior surface of the pipe. The sensor should be mounted in contact with the underside of the pipe in order to insure accurate temperature readings. The sensor assembly is secured to the pipe by using the supplied wire ties to wrap and secure the sensor to the pipe.

  • Page 36: Outside Air Temperature Sensor

    Section 2 Outside Air Temperature Sensor The outside air sensor must be located where it will not be affected by direct sun or heat producing equipment. Mounting under the eve of a roof is often a good choice. Caution: Complaints of inaccurate outside sensor readings are very common and can almost always be shown to be the result of poor sensor location.

  • Page 37: Commlink Ii Interface

    WattMaster WHP CommLink II Interface The CommLink II Interface provides for communications between the MiniLink communication interfaces installed on the system. The CommLink II is required for proper communications, even if a PC is not used. Locate the CommLink II near the computer or modem if they are installed on the system.

  • Page 38: Whp Controller

    Section 2 WHP Controller The WHP Controller may be installed in any convenient protected location. Observe the recommended environmental limitations for the WHP Controller when selecting a installation location. The environmental limitations are a temperature range of 10 F to 149 F, and a maximum operating humidity of 90% RH non-condensing.
  • Page 39 EXCEPT ON THE LOOP WITH THE LOOP CONTROLLER CONNECTED. THE LOOP CONTROLLER ADDRESS IS 30, WHICH ALLOWS FOR ONLY 29 WHP CONTROLLERS ON THIS LOCAL LOOP. Section 2 Water Source Heat Pump Unit Connections 24VAC Fan-On/Off Rev. Valve-On/Off Compressor-On/Off Heat Pump Reset Aux.
  • Page 40 Section 2 The WHP Controller requires the following electrical connections: 18 Gauge minimum unless otherwise noted. -24VAC Supply Voltage... 2 Conductors -Communications Loop ... 2 Conductor twisted pair with shield -Discharge Air Temperature Sensor ... (24 ga. Min.) 2 Conductors -Room Air Temperature Sensor...(24 ga.

  • Page 41: Whp Controller Addressing

    WattMaster WHP WHP Controller Addressing WHP Controller Address Switch Setting F i g u r e 2 - 1 2 : Installation and Wiring NOTE: IGNORE ANY MARKINGS OR NUMBERS ON THE SWITCH USE THE CHART! To determine the boards address, add the values of all the switches which are toggled down in the direction of the arrow...

  • Page 42: Minilink Addressing

    Section 2 MiniLink Addressing Connect To Next MiniLink And/Or CommLink On Network Loop Network Loop RS-485 19200 Baud NETWORK All Communication Loop Wiring Is Straight Through Local Loop RS-485 9600 Baud Connect To Next Controller or System Manager Caution! The MiniLinks Must Have Address Switches Set Between 1 And 30 (Up To 30 MiniLinks Are Allowed Per WHP System System).

  • Page 43: Room Sensors

    WattMaster WHP Room Sensors The room sensor uses a patented flush mount design to isolate the temperature sensing element from the housing which mounts flush with the wall surface. Room sensors should be located on an inside wall away from direct sunlight or heat producing equipment such as computers, copiers, etc.
  • Page 44 Section 2 Connect the terminal labeled GND on the zone sensor to the terminal labeled GND on the WHP Controller Analog Input terminal block. Connect the terminal labeled TMP on the zone sensor to the terminal labeled AIN 1 on the WHP Controller Analog Input terminal block.

  • Page 45: Supply Air Temperature Sensor

    WattMaster WHP Supply Air Temperature Sensor The supply air temperature sensor should be located in the duct, as close to the rooftop unit discharge as possible for best response. Locate the sensor in the center of the widest part of the duct. Use the supplied template and a 5/16"...

  • Page 46: Leaving Water Temperature Sensors

    The leaving water temperature sensor (optional) when used should be located on the leaving water piping close to the water source heat pump unit. Either a thermowell type or a surface mount sensor may be used depending on job requirements.
  • Page 47 Table of Contents LCD/Keypad Operations... 1 System Manager Layout...2 Keypad Functions ...2 System Manager LED Indicators ...3 Heat Pump Status Screens... 4 View Status Only ...4 View Alarms ...8 Menu Setpoints ...9 Set Time & Date ... 9 New Passcodes... 11 Rebuild Alarm Map...

  • Page 49: Lcd/Keypad Operations

    O u t d o o r A i r 5 8 . 7 ° F The Water Source Heat Pump System Manager is the operator’s interface to the status and setpoints of any WattMaster Water Source Heat Pump (WHP) component on your communications loop.

  • Page 50: System Manager Layout

    Section 3 System Manager Layout H e a t P u m p v 2 . 1 1 W e d n e s d a y O p e r a t i o n s 7 / 2 1 / 0 4 0 4 : 3 5 P M O u t d o o r A i r 8 5 .

  • Page 51: System Manager Led Indicators

    WattMaster WHP System Manager LED Indicators There are two LED indicators located on the right hand side of the System Manager. The top LED indicates an Alarm condition if the Manager detects an alarm condition while polling the system. The bottom LED is active during actual communications or packet transfers. This LED will normally “flicker”...

  • Page 52: Heat Pump Status Screens

    Section 3 Heat Pump Status Screens View Status Only S t a t u s O n l y V i e w [ E n t e r U n i t I D # ] S e l e c t e d U n i t : 1 0 1 By selecting the View Status Only menu item, you can access any heat pump or the loop controller and read all...

  • Page 53: Status Screen

    WattMaster WHP If you selected menu item #1 View Status Only and you entered the Unit ID of an installed WHP Controller, the following Status Screens are available. Status Screen #1 W S H P R V V 2 . 0 3 S p a c e T e m p .
  • Page 54 Section 3 Status Screen #3 W S H P R V V 2 . 0 3 O c c u p i e d M o d e F a n S t a t u s . . . : O N O p e r a t i o n s E n a b l e d Status Screen #4 W S H P R V...
  • Page 55 WattMaster WHP Status Screen #6 W S H P R V V 2 . 0 3 Line 2 - S p a c e T e m p S e n s o r O K F i l t e r O K C o o l i n g F a i l u r e Line 3 - Line 4 -...

  • Page 56: View Alarms

    Section 3 View Alarms Alarm Address Locations S Y S T E M A L A R M S T A T U S A l a r m @ U n i t I D 1 1 8 Alarm Clearing S Y S T E M A L A R M S T A T U S C l e a r A l a r m s ? Y E S...

  • Page 57: Menu Setpoints

    WattMaster WHP Menu Setpoints Full Setpoint Access If you selected the Menu key from the first menu screen you 1 ) S e t T i m e & D a t e can access all setpoints available from any unit on your system. 2 ) A c c e s s U n i t s 3 ) N e w P a s s c o d e s You must be a Level 2 user to access these setpoints.
  • Page 58 Section 3 Programming Date P r o g r a m T i m e / D a t e Month M o n t h ( 1 - 1 2 ) : D a y ( 1 - 3 1 ) : Y e a r ( 0 0 - 9 9 ) : Year...

  • Page 59: New Passcodes

    WattMaster WHP New Passcodes Programming Passcodes The System Manager has two levels of passcode. E n t e r N e w P a s s c o d e L e v e l 1 ..: X X X X L e v e l 2 .

  • Page 60: Rebuild Alarm Map

    Section 3 Rebuild Alarm Map Rebuilding Screens If you would like the LED Alarm Indicator to function on the C l e a r i n g O l d M a p front of your System Manager, you must enable Alarm Polling .

  • Page 61: Heat Pump Setpoints

    WattMaster WHP Heat Pump Setpoints Heat Pump Setpoint Menu From the main menu screen select MENU on the keypad, 1 ) W H P S e t p o i n t s select MENU again for Setpoints. Then select “Access Units” 2 ) W H P S c h e d u l e s (keypad #2) and finally enter the loop and zone number for the 3 ) R e s e t P u m p s...
  • Page 62 Section 3 Setpoint Screen #2 The Unoccupied Heating and Cooling Setbacks are programmed W H P # 1 S e t p o i n t s on this screen. The Cooling SetUp is added to the Occupied U n o c c u p i e d S e t p o i n t s C o o l S e t u p .
  • Page 63 WattMaster WHP Setpoint Screen #5 The Min Run Time determines how long the compressor W H P # 1 S e t p o i n t s must remain on once it has been activated. The Min Off Time M i n R u n T i m e : x M i n M i n O f f T i m e : x M i n determines how long the compressor must remain off once it...
  • Page 64 Section 3 Setpoint Screen #8 If your heat pump uses a reversing valve to determine the W H P # 1 S e t p o i n t s heating or cooling mode of operation, select the message W H P C o n f i g u r a t i o n R / V A L V E &...
  • Page 65 WattMaster WHP Setpoint Screen #11 If your system is configured to use the reversing valve and W H P # 1 S e t p o i n t s you only have one stage of heating and cooling, that last R e l a y 5 C o n f i g u r a t i o n A U X I L I A R Y R E L A Y M O D E relay becomes available for other uses.
  • Page 66 Section 3 Setpoint Screen #14 The Heat Pump Controller can use the internal time clock for W H P # 1 S e t p o i n t s H e a t P u m p S c h e d u l i n g a setting an occupied schedule, for this the setpoint will be 0.
  • Page 67 WattMaster WHP Setpoint Screen #17 This setpoint is to shut the heating off when the supply air W H P # 1 S e t p o i n t s H e a t S t a g e # 2 temperature is too warm.

  • Page 68: Whp Schedules

    Section 3 2) WHP Schedules The Water Source Heat Pump controllers contain their own built in scheduling capability for calculating Occupied/Unoccupied periods. Select item #2 from Schedules menu to access the following schedule programming menu. Schedule Menu W S H P S c h e d u l e s...

  • Page 69: Holidays

    Water Source Heat Pumps for a request to run signal. Scheduling is maintained separately in each Water Source Heat Pump. If you want to be able to schedule all Water Source Heat Pumps on and off at the same time, you can input a schedule on the Loop Controller and it will broadcast that schedule to all WHPs.

  • Page 70: Reset Pumps

    Section 3 3) Reset Pumps If one of your heat pumps has tripped off, it can be manually W S H P R V v 2 . 0 3 reset from the following screen. You will have entered the T r i p p e d P u m p R e s e t R e s e t M o d e : D i s a b l e d Unit ID to access the WHP Menu screen, so that is the unit U s e L e f t / R i g h t A r r o w...

  • Page 71: Loop Controller Status

    WattMaster WHP Loop Controller Status Loop Controller Status Menu 1 ) V i e w S t a t u s O n l y 2 ) V i e w A l a r m s M e n u ) S e t p o i n t s E S C ) T o E x i t From the main menu screen select MENU on the keypad.
  • Page 72 Section 3 Status Screen #2 L o o p C o n t r o l v 1 . 0 6 N o C a l l t o R u n W a t e r F l o w P r o v e d ! L O O P E N A B L E D Status Screen #3 L o o p C o n t r o l v 1 .

  • Page 73: Status Screen

    WattMaster WHP Status Screen #5 Line 1 - C o o l S t a g e # 5 . : O F F C o o l S t a g e # 6 . : O F F Line 2 - C o o l S t a g e # 7 .
  • Page 74 Section 3 Status Screen #7 L o o p C o n t r o l v 1 . 0 6 N o A l a r m s ! Note: If no alarms exist, then the screen displays the message shown for No Alarms! If ANY alarm exists, then the three lines display one of the messages shown above.

  • Page 75: Loop Controller Setpoints

    WattMaster WHP Loop Controller Setpoints Loop Controller Setpoint Menu 1 ) L C S e t p o i n t s 2 ) L C S c h e d u l e s 3 ) L C F o r c e M o d e s E S C ) T o E x i t Setpoint Screen #1...
  • Page 76 Section 3 Setpoint Screen #3 If the controlling water temperature drops below this Setpoint, W H P L o o p S e t p o i n t s H E A T I N G A D D I T I O N the Heat Addition or Boilers begin to stage on.
  • Page 77 WattMaster WHP Setpoint Screen #6 If the controlling water temperature rises above the Water Hi W H P L o o p S e t p o i n t s Limit setpoint, all heat addition will be removed and one x x °...
  • Page 78 Section 3 Setpoint Screen #9 The two pumps will switch after this programmed amount of W H P L o o p S e t p o i n t s L e a d / L a g C h a n g e o v e r time so that each pump accumulates roughly the same S w i t c h A f t e r x x x H r s number of run time hours.
  • Page 79 WattMaster WHP Setpoint Screen #12 If you configured the system for Variable Speed Pumping with a W H P L o o p S e t p o i n t s Pressure Sensor for proof of flow, the Loop Controller can send I s o l a t i o n V a l v e s S e t O p e n i f P S I i s A b o v e a signal to all the Heat Pumps to open their Isolation Valves...

  • Page 80: Notes

    Section 3 WattMaster WHP Notes: 3-32 Programming...
  • Page 81 Table of Contents 1.0 Communications Overview... 1 1.1 How It Works...1 1.2 WattMaster WHP System ...1 2.0 WHP Controller Overview ... 4 2.1 How It Works...4 2.1.1 Initialization ...4 2.1.2 Operating Summary ...4 2.2 Becoming Familiar with the WHP Controller ...5 2.2.1 24 VAC Power Connector ...5 2.2.2 Analog Inputs...6 2.2.3 Analog Output Description ...6...
  • Page 82 Section 4 5.0 Troubleshooting ... 21 5.1 General Troubleshooting...21 5.1.1 Communications Troubleshooting Checklist...21 5.1.2 General Troubleshooting Checklist ...22 5.2 Alarms...23 5.3 Checking Comm. Loop Voltages...24 5.3.1 Checking the CommLink II Network Loop ...24 5.3.2 Checking the Comm Loop at the CommLink II ...25 5.3.3 Checking the CommLink II Driver ...26 5.3.4 Checking the MiniLink Network Loop...27 5.3.5 Checking the MiniLink Network Driver...28...

  • Page 83: Communications Overview

    WattMaster WHP Section 4 1.0 Communications Overview Perhaps no other portion of the system seems as difficult to diagnose as the communica- tions loop, yet it really can be quite simple if you understand how it works. In fact, much of the troubleshooting can be done by simple observation.
  • Page 84 WattMaster WHP COMPUTER (OPTIONAL) 110/24 VAC Power Pak Modem 110/24 VAC (Optional) Power Pak Network Loop L IN L IN K II K II CommLink II Multiple Loop Interface MiniLink Loop # 1 24VAC 24VAC 24VAC MiniLink Loop # 2 24VAC 24VAC Typical Network &...
  • Page 85 WattMaster WHP All communications wiring should be labeled to avoid confusion and to aid future servicing. COMPUTER (OPTIONAL) Remote Link (OPTIONAL) COMM SHLD COMM RS-485 COMM LED1 LED2 +VREF 5.11V TEST POINT EWDOG VREF ADJ INPUTS +VDC AIN1 AIN2 AIN3 AIN4 AIN5 AOUT1...

  • Page 86: Whp Controller Overview

    During this initialization period, the controller retrieves all operating setpoints from its non-volatile EEPROM memory and initializes all outputs to an OFF condition. Note: All future references to the Water Source Heat Pump Controller in this docu- ment use WHP as the designation.

  • Page 87: Becoming Familiar With The Whp Controller

    WattMaster WHP 2.2 Becoming Familiar with the WHP Controller COMMUNICATIONS PIN 1 DRIVER CHIP INDICATION C O M M RS-485 COMMUNICATIONS S H L D LOOP L D 4 COMMUNICATIONS R E C . ADDRESS SWITCH ( ADDRESS 18 SHOWN ) ANALOG INPUTS Space Sensor 1 2 V...

  • Page 88: Analog Inputs

    WattMaster WHP 2.2.2 Analog Inputs This connector carries the analog and binary control input signals. AIN1 - Space Temp - This input accepts a two wire 10K Type III thermistor tem- perature sensor. The sensor measures 10,000 Ohms @ 77 F. The resistance drops as the temperature increases.

  • Page 89: Communications Connector

    WattMaster WHP OUT3 - Compressor or Heat 2 - This output enables the compressor if you have configured the WHP Controller for a compressor and reversing valve configura- tion. If the WHP Controller is configured for individual staging of heating and cooling (no reversing valve) then this output enables heating stage 2.

  • Page 90: Whp Controller Wiring

    WattMaster WHP Section 4 2.2.6 WHP Controller Wiring Communication LED Typical WHP Controller Wiring Diagram F i g u r e 4 - 4 : Start-Up and Troubleshooting...

  • Page 91: Loop Controller Overview

    WattMaster WHP 3.0 Loop Controller Overview 3.1 How It Works 3.1.1 Initialization On system powerup LED2 remains extinguished for five seconds. After this delay, the LED2 will blink out the address of the controller (Address Switch Setting). The LED2 will then extinguish for another five seconds and then the LED2 will begin blinking a diagnostic code every ten seconds.

  • Page 92: Loop Controller Inputs & Outputs

    WattMaster WHP 3.2 Loop Controller Inputs & Outputs 3.2.1 Analog Inputs AIN1 - Return Water Temp - This input accepts a two wire 10K Type III ther- mistor temperature sensor. The sensor measures 10,000 Ohms @ 77 F. The re- sistance drops as the temperature increases.

  • Page 93: Binary Output

    WattMaster WHP 3.2.3 Binary Output R1 – Compressor Enable – Energizes the first stage of cooling. R2 – Main Pump – Energizes the lead water pump. R3 – Standby Pump – Energizes the standby pump if the main pump fails to start.

  • Page 94: Comm Connector - Communications

    WattMaster WHP 3.2.6 Comm Connector - Communications RS-485 Communications Connector - This connector provides the connection point for the Local Loop RS-485 communications loop. The wiring consists of a twisted pair of wires with a shield. T - RS-485 (+) Communications terminal SHLD - Common return wire, this point is internally tied to GND on the WHP Controller.
  • Page 95 WattMaster WHP Section 4 Connect To Next Controller And/Or MiniLink On Local Loop Local Loop RS-485 9600 Baud (See Note 3). Optional Pressure sensor Line Voltage Figure 4-5: Loop Controller Inputs & Outputs Start-Up and Troubleshooting 4-13...

  • Page 96: Start-Up

    WattMaster WHP 4.0 Start-Up 4.1 Blink Codes for WHP Controllers The WHP Controller uses an on board LED to indicate various diagnostic conditions during powerup and operation. The WHP Unit LED is labeled “COMM”. Starting with power up the LED blink codes are as follows: Off for five seconds COMM LED blinks the board address (Address 14 = 14 blinks) Five second pause...

  • Page 97: Blink Codes For Loop Controllers

    WattMaster WHP 4.2 Blink Codes for Loop Controllers The Loop Controller uses an on board LED to indicate various diagnostic conditions during powerup and operation. The Loop Controller Unit LED is labeled “LED2”. Starting with power up the LED blink codes are as follows: Off for five seconds COMM LED blinks the board address (Address 14 = 14 blinks) Five second pause...

  • Page 98: Installation And Commissioning Information

    WattMaster WHP 4.4 Installation and Commissioning Information Familiarize yourself with the installation manual and system wiring diagrams before installing! 1. Check to see if you have all the correct components for your installation. 2. Establish the location for the CommLink Interface first. This is where your communi- cation cable will begin.
  • Page 99 WattMaster WHP 10. Install CommLink and power-up. At this point you are ready to begin commissioning the system. It is preferred, though not necessary, to use a PC with Prism software to assist in the commissioning process. 11. Start with the first controller on the communication loop or in multiple loop systems; start with the MiniLink or with the System Manager.
  • Page 100 WattMaster WHP COMM LINK II INTERFACE (MULTIPLE LOOP) T B1 COMM SHLD COMM RS-485 COMM LED1 LED2 +VREF 5.11V TEST POINT EWDOG VREF ADJ INPUTS +VDC AIN1 AIN2 AIN3 AIN4 AIN5 AOUT1 AOUT2 AIN7 PJ 1 PRESSURE SENSOR EXPANSION NETWORK LOOP TO OTHER MINILINKS (NETWORK TERMINALS ONLY)

  • Page 101: Setting Address Switches

    WattMaster WHP 4.5 Setting Address Switches 4.5.1 Setting the MiniLink Address Switch > LOOP ADDRESS SWITCH > MiniLink Address Switch Setting F i g u r e 4 - 9 : Start-Up and Troubleshooting LOOP ADDRESS SWITCH ADDRESS SWITCH SHOWN IS ADDRESS SWITCH SHOWN IS SET FOR ADDRESS 1 SET FOR ADDRESS 13...

  • Page 102: Loop Controller Addressing

    WattMaster WHP 4.5.2 Loop Controller Addressing The Loop Controller address should always be set for address #30. A maximum of 29 WHP Controllers on the loop that contains the Loop Controller. All other loops may have 30 WHP Controllers. (Refer to Figure 2-10 for more detail) 4.5.3 WHP Controller Addressing WHP Controller Address Switch Setting...

  • Page 103: Troubleshooting

    WattMaster WHP 5.0 Troubleshooting 5.1 General Troubleshooting The following is a guide to assist in troubleshooting the WattMaster WHP System. It is provided as a systematic approach to determining and resolving common system problems. 5.1.1 Communications Troubleshooting Checklist No WHP or Loop Controller Units are Communicating Is the CommLink II connected and plugged in? Is the CommLink II installed, a single or multiple loop version.

  • Page 104: General Troubleshooting Checklist

    WattMaster WHP 5.1.2 General Troubleshooting Checklist Begin troubleshooting by locating the general problem in the list below. Detailed component troubleshooting information follows later in this section. Zone is too warm Is zone calling for cooling? Is the compressor disabled due to minimum off time setting? Is water proof of flow signal disabled? Is the LED blinking an error code? See Figure 4-6.

  • Page 105: Alarms

    WattMaster WHP Section 4 5.2 Alarms When an alarm occurs in the WHP or Loop Controller, it is reported to the System Manager. The alarms cause the light on the System Manager to illuminate. The View Alarms screen will indicate the address of the alarms. The Status screen will display the type of alarm that has occurred.

  • Page 106: Checking Comm. Loop Voltages

    WattMaster WHP 5.3 Checking Comm. Loop Voltages 5.3.1 Checking the CommLink II Network Loop Diagram Overview This test checks for proper Network loop voltages at the CommLink II. The Loop LED (located on the front panel) should “flicker” when the CommLink II is T i p : attempting to communicate.

  • Page 107: Checking The Comm Loop At The Commlink Ii

    WattMaster WHP 5.3.2 Checking the Comm Loop at the CommLink II Diagram The indicated values are typical of a normal system, actual readings may deviate slightly due to the number of units connected and other system specific factors. All of the connected Minilinks should be powered up for this test. N o t e : Overview This is a “quick check”...

  • Page 108: Checking The Commlink Ii Driver

    WattMaster WHP 5.3.3 Checking the CommLink II Driver Diagram Overview This test checks for proper Network loop voltages coming from the CommLink II. The Loop LED (located on the front panel) should “flicker” when the CommLink II is T i p : attempting to communicate.

  • Page 109: Checking The Minilink Network Loop

    WattMaster WHP 5.3.4 Checking the MiniLink Network Loop Diagram The indicated readings are typical of a normally operating system. Actual readings may vary slightly due to the number of units installed and other factors. Any significant devia- tion from these values generally indicates a problem. These tests assume that the CommLink II is connected and powered, and that all N o t e : MiniLinks which are connected are also powered.

  • Page 110: Checking The Minilink Network Driver

    WattMaster WHP 5.3.5 Checking the MiniLink Network Driver Diagram These tests assume that the MiniLink being checked is powered up N o t e : Overview This check is intended to determine if the Network Comm Driver chip on a MiniLink is damaged.

  • Page 111: Checking The Minilink Local Loop

    WattMaster WHP 5.3.6 Checking the MiniLink Local Loop Diagram The indicated readings are typical of a normally operating system. Actual readings may vary slightly due to the number of units installed and other factors. Any significant deviation from these values generally indicates a problem. These tests assume the MiniLink is powered up N o t e : Overview...

  • Page 112: Checking The Local Loop At Minilink

    WattMaster WHP 5.3.7 Checking the Local Loop at MiniLink Diagram The indicated values are typical of a normal system. Actual readings may deviate slightly due to the number of units connected and other system specific factors These tests assume that the controllers being checked are powered up. N o t e : Overview This is a “quick check”...
  • Page 113 WattMaster WHP 5.3.7 (continued) Action C o n d i t i o n If voltages are too high or too low on either side Start-Up and Troubleshooting A c t i o n 1. One or more of the attached controllers has a damaged Comm Driver chip.

  • Page 114: Checking The Minilink Local Loop Driver

    WattMaster WHP 5.3.8 Checking the MiniLink Local Loop Driver Diagram The indicated values are typical of a normal operating system. Actual readings may deviate slightly. These tests assume that the MiniLink is powered up. N o t e : Overview This test checks for proper Local Loop voltages coming from the MiniLink.

  • Page 115: Checking The Local Loop At A Whp Controller

    WattMaster WHP 5.3.9 Checking the Local Loop at a WHP Controller Diagram The indicated readings are typical of a normal operating system. Actual readings may vary slightly due to the number of units installed and other factors. Any significant deviation from these values generally indicates a problem.

  • Page 116: Checking Whp Controller Driver Chip

    WattMaster WHP 5.3.10 Checking WHP Controller Driver Chip Diagram These tests assume that the controller being checked is powered up. N o t e : Overview This check is intended to determine if the Comm Driver chip on a controller is damaged. Damage typically occurs when the communications loop is exposed to excessive voltage, as may occur during installation, due to wiring errors.

  • Page 117: Troubleshooting Loop Controller

    WattMaster WHP 5.4 Troubleshooting Loop Controller 5.4.1 Checking the Loop Controller Analog Inputs Diagram SET METER TO READ DC VOLTS ALL READINGS ARE TAKEN WITH THE (-) LEAD OF THE METER ON THE GND TERMINAL Measurements M e t e r Ignore readings for any connections which are not used in the equipment.
  • Page 118 WattMaster WHP 5.4.1 (continued) AIN4 1.9 volts (100 F) - 3.6 volts (40 F) Outdoor Air Temp Typical is 2.5 volts @ 77 F AIN5 If the input is OPEN, the voltage will be greater than 5.0 volts Manual Reset If the input is CLOSED, the voltage will be less than 0.5 volts AIN7 If the input is OPEN, the voltage will be greater than 5.0 volts...

  • Page 119: Checking The Loop Controller Outputs

    WattMaster WHP 5.4.2 Checking the Loop Controller Outputs Diagram SET METER TO READ DC VOLTS ALL READINGS ARE TAKEN WITH THE (-) LEAD OF THE METER ON THE GND TERMINAL Measurements M e t e r Ignore readings for any connections which are not used in the equip- ment.

  • Page 120: Checking The Local Loop At A Whp Loop Controller

    WattMaster WHP 5.4.3 Checking the Local Loop at a WHP Loop Controller Diagram The indicated readings are typical of a normal operating system. Actual readings may vary slightly due to the number of units installed and other factors. Any significant deviation from these values generally indicates a problem.

  • Page 121: Checking Whp Loop Controller Driver Chip

    WattMaster WHP 5.4.4 Checking WHP Loop Controller Driver Chip Diagram These tests assume that the controller being checked is powered up. N o t e : Overview This check is intended to determine if the Comm Driver chip on a controller is damaged. Damage typically occurs when the communications loop is exposed to excessive voltage, as may occur during installation, due to wiring errors.

  • Page 122: Comm Driver Chip Replacement

    WattMaster WHP 5.4.5 Comm Driver Chip Replacement WHP CONTROLLER WHP CONTROLLER COMM DRIVER CHIP PIN 1 Ys101806 REV.2 MODULAR SYSTEM MANAGER Comm Driver Chip (U13) Pin 1 System Manager COMM DRIVER CHIP PIN 1 ( U1 ) COMMLINK II Comm Driver Chip Replacement F i g u r e 4 - 1 1 : 4-40 MINILINK COMMUNICATIONS INTERFACE...

  • Page 123: Temperature Sensor Resistance Chart

    WattMaster WHP 5.5 Temperature Sensor Resistance Chart T E M P E R A T U R E R E S I S T A N C E º 93333 80531 69822 60552 52500 45902 40147 35165 30805 27140 23874 21094 18655 17799...

  • Page 124: Pressure Sensor Voltage Chart

    WattMaster WHP 5.6 Pressure Sensor Voltage Chart P R E S S U R E C U R R E N T P S I M I L I A M P S 4.00 4.32 4.64 4.96 5.28 5.60 5.92 6.24 6.56 6.88...

  • Page 125: Notes

    WattMaster WHP Section 4 Notes: Start-Up and Troubleshooting 4-43...
  • Page 126 Form: WM-WHP-IO-02A Printed in the USA October 2004 All rights reserved Copyright 2004 Wattmaster Controls Inc. 8500 NW River Park Drive Parkville MO 64152 E-mail: mail@wattmaster.com Phone (816) 505-1100 Fax (816) 505-1101...

This manual is also suitable for:

Whp

Table of Contents

Save PDF