Guardian - System Monitor And Speed Control

Transcript

Guardian - System Monitor and Speed Control              Description:  The Coastal   Guardian comprises a panel measuring 5”w x 2”h that incorporates a Coastal MK II Digital  Thermostat/ Thermometer, a compressor speed adjustment knob, and a diagnostic fault LED. The panel is supplied with  a 10’ thermostat sensor and a 10’ control cable that connects to a Danfoss compressor controller. If an AEO controller is  installed  (101N0300  or  320),  “AUTO”  setting  will  give  automatic  speed  control  (Adaptive  Energy  Optimizer),  but  if  a  standard  controller  is  installed  (101N0210)  there  will  be  no  automatic  speed  control  capability.  A  Power  Terminal  Multiplier circuit board is included to facilitate easy power connections on the Danfoss controller, and a 2 amp in‐line  fuse is installed in the positive power feed wire. For operation on 12v power supplies only.  Location:  The panel is designed to be mounted on a vertical surface, secured by the four screws provided. Care  must be taken to ensure that the location chosen will not subject the panel or its components to splashing or running  water, steam, corrosive gasses, excessive vibration, or physical damage. Ideally the location will allow the 10’ thermostat  sensor and control cable to be installed without being extended. If it is necessary to extend either cable, the electrical  joints should be soldered. The panel requires a cut‐out measuring 4.5” x 1.5”, and a depth of 3”.  Installation:   The Power Terminal Multiplier is to be installed on the top two terminals of the Danfoss controller after  removing the existing + and – power feed wires (if fitted). This provides two sets of + and – terminals: one set for the  incoming 12v power feed, and one for the power supply to the    Guardian. Ensure that the female connectors mate  correctly with the male pins. The   Guardian panel is then mounted and secured and the thermostat sensor and control  cables  run  to  their  respective  locations.  The  control  wires  connect  to  the  Danfoss  controller  as  shown  below.  The  thermostat  sensor  should  ideally  be  located  at  mid‐height  in  the  box,  and  not  on  a  wall  that  has  any  portion  of  an  evaporator mounted on it. The sensor should be isolated from the box wall with a plastic tie or similar.  Wiring:  Power Terminal Multiplier      Black          Cable to   Guardian panel  Red  Green  Blue  Orange  + + F D C P T Danfoss Standard or AEO Compressor Controller 12v Power  Supply input 12v switched output for  Fan or Pump Relay  Over:  Guardian - Operation    Operation:  The Coastal    Guardian performs three functions:  1. Controls and displays refrigerator or freezer box temperature and compressor operational status.  2. Provides for automatic or manual compressor speed control for maximum possible system efficiency.  3. Gives audible and visual indication of temperature anomalies and system malfunction.  1.   The  Coastal  MK  II  Digital  Thermostat/Thermometer  is  pre‐installed  and  set  to  work  as  a  refrigerator  control  with a set point of 40 degrees Fahrenheit. Refer to separate instruction sheet for details on adjusting temperature set  point, differential, temperature scale (F or C), and alarm thresholds.  2.  Compressor  speed  is  controlled  by  adjusting  the  rotary  knob.  When  set  to  the  “AUTO”  position  and  with  the  AEO compressor controller installed, compressor will automatically run at the most efficient speed. With the standard  compressor controller installed, the “AUTO” setting is non‐operational and will become the lowest speed setting.  The  lowest  speed  should  be  set  so  that:  (a)  the  box  maintains  the  desired  temperature,  and  (b)  the  compressor  runs  for  between 30 and 45 minutes in the hour.  The principle behind controlling compressor speed being that the longer and  slower a compressor can be run, the more efficient it will be and the less power it will consume overall.   3.  The  Diagnostic  LED,  labeled  “FAULT”,  will  display  a  flashing  error  code  of  between  one  and  five  flashes  dependent on the nature of the fault, as listed below. Each flashing error code cycle is repeated every 4 seconds. When  a fault is detected, the compressor will stop but the fan or water pump, if applicable, will continue to run. A re‐start will  be attempted approximately every 60‐90 seconds. The fan or water pump will stop during restart attempts.   One Flash – Indicates low voltage. Voltage at terminals on the Danfoss controller has dropped to less than 10.4v.  Voltage must then rise to above the cut‐in voltage of 11.7v before the compressor will attempt a re‐start. NOTE:  If initial power applied at start‐up is less than 11.8 volts there will be no code flashing on the diagnostic LED, and  the compressor will not start until the voltage is raised above 11.8 volts.   Two Flashes ‐ Indicates an overload on the Fan output. The fan output cannot support an average load greater  than 0.5 amp, or a peak load greater than 1 amp for two seconds.    Three  Flashes  –  Indicates  that  the  compressor  cannot  start  due  to  too  high  a  differential  pressure  in  the  compressor. This is a common problem where poor voltage or intermittent breaks in the power supply cause the  controller to attempt a compressor re‐start too soon after it has been stopped for some reason.   Four Flashes – Indicates that the compressor cannot reach minimum speed of 1,850 RPM.   Five Flashes – Indicates that the electronics heat sink has exceeded 212 deg F (100 deg C). This can be due to an  overcharge of refrigerant, water in the system, or excessive ambient temperatures combined with a compressor  operating under extreme load. A re‐start will be attempted when heat sink has cooled to 170 deg F (80 deg C).       PO Box 4535 Annapolis  MD 21403  USA – www.frigoboat.com – [email protected] – 301‐352‐5738    Coastal MK II Digital Thermostat/Thermometer (1) Description The Coastal MK II Digital Thermostat/Thermometer comprises a plastic housing that mounts in a stainless steel plate measuring 3-5/8” x 2-1/8”. The front panel incorporates a three-digit red LED display with five-button control panel. The display shows degrees and tenths of degrees, and can be set to work in either Fahrenheit or Celsius. The Coastal MK II requires a 12v supply protected by a 2 amp fuse. Wiring connections are by screw terminals at the rear of the unit. A temperature sensor probe is included, with a 10’ cable (2) Location The thermostat is designed to be mounted on a vertical surface, secured at the rear by a sliding bracket. Care must be taken to ensure that the location chosen will not subject the panel or its components to splashing or running water, steam, corrosive gasses, excessive vibration, or physical damage. Ideally the location will allow the 10’ thermostat sensor to be installed without being extended. If it is necessary to extend the sensor cable, the electrical joints should be soldered. When mounted in the stainless steel plate, the thermostat requires a cut-out of 2-7/8” x 1-1/4”, and a minimum depth of 2-1/2”. (3) Temperature Sensor Probe Mounting The temperature sensor probe is mounted in the refrigerator or freezer cabinet so that it senses the average air temperature. It does not attach to the evaporator. It is best mounted at mid-height, on a wall or divider that does not have any part of the evaporator mounted on it, and insulated from the wall to ensure that it senses air temperature only. (4) Operation The Coastal MK II Digital Thermostat/Thermometer will display box temperature continuously. When the box warms up to a temperature of two degrees above the set point (default), the thermostat will start the compressor. This will be signified by the illumination of a yellow snowflake symbol on the display. When the system has lowered the temperature to the set point, the compressor is stopped and the snowflake symbol extinguished. The thermostat can be turned off and on by pressing the Set and DOWN keys together. Note that the two keys with raindrops and light bulb symbols are inoperative on this model of thermostat. (5) Adjusting Temperature Set Point The Coastal Digital Thermostat/Thermometer is supplied set as a refrigerator thermostat in degrees Fahrenheit, with 40F as the set point. If installed on a freezer system it is suggested to set the initial set point to 12F (-12C) To change temperature set-point:  Press SET button. "SET" appears in display.  Press SET button again. Set point value is displayed and flashes.  Press UP or DOWN arrows to the desired set-point. Suggested starting set-points are 40F (4C) for a refrigerator, and 12F (-12C) for a freezer.  Press SET button. “SET” is displayed  Press SET and DOWN buttons together to quit and return to temperature display, or display will revert automatically in one minute. NOTE: Allow sufficient time for the system to settle down between making adjustments. At least one day is recommended. (6) Fault Code Display     “ooo” “---“ “ALH” “ALL” Temperature Sensor Probe or its cable is open circuit or disconnected. Temperature Sensor Probe or its cable is short circuit Buzzer will also sound. High temperature alarm has been activated. See (9) Buzzer will also sound. Low temperature alarm has been activated. See (9) (7) Emergency Operation if Temperature Sensor Probe Fails If the Temperature Sensor Probe becomes either short circuit or open circuit, the Coastal MK II will show an alarm on the display, see (6), and will automatically run the compressor on an emergency on-off routine according to time settings entered by the operator. These are set initially at 15 minutes on, 15 minutes off. (8) Wiring If using to control a spillover fan: Do not use wires to Danfoss controller Bridge terminals 5 and 8 Connect black or blue fan wire to 6 Connect red fan wire to 9 NOTES: Wire size - 18 gage or higher Terminals 8 and 9 – Any color wires are OK Terminals 5 and 6 – Red and Black (or Yellow) Rear view of Coastal MK II 2 3 4 5 6 7 8 9 Terminal “C” on Danfoss controller Temperature Sensor 12v DC Fused at 2 amp + Terminal “T” on Danfoss controller (Over) (9) Temperature Alarms The Coastal MK II is equipped with a buzzer to sound an alarm if the temperature exceeds the set point by the maximum and minimum values as entered in A1 and A2 in the ALA menu. See(11). These have been pre-set to the maximum permissible values so that the alarm feature is effectively disarmed. The alarms can be activated by adjusting the values of A1 and/or A2 to the desired number of degrees above or below the Set Point at which the alarm will operate. The alarm is set to become operational 1.1 hours after the system is started. This can be adjusted in A6. The alarm is set to activate 1.1 hours after the threshold set in A1 or A2 is reached. This can be adjusted in A7. The alarm can be turned off by pressing the Set and DOWN buttons together. (10) General Reset A General Reset should only be used as an emergency measure if the programming becomes corrupted. This action will return all settings to the original factory defaults. It will then be required to reinstall the Coastal values as shown in (11). 1. Press Set for 8 seconds. “0” is shown on display. Press Set again, “CON” is displayed. 2. Press DOWN arrow. Display shows “Ini”. Press Set “Hor” is displayed.. Press UP arrow until “HO” is displayed 3. Press Set; “O” is displayed and flashes. Press Set for 8 seconds and general reset is activated. (11) Programming The Coastal MK II is a multi-purpose device with many features that are not appropriate for marine refrigeration use, and so only the relevant program parameters are shown below. Complete instructions are available on request. There are five menus. Within each menu there are numerous parameters that can be adjusted. Menu names are as follows, in sequence: 1. 2. 3. 4. 5. “CON” (Compressor) – Sets parameters for compressor. “dEF” (Defrost) – Not used. Deactivated by setting d2 to 0. “PrO” (Probe) – Sets parameters for temperature probe (sensor). “ALA” (Alarm) – Provides settings for alarms. “Ini” (Initialization) – Advanced parameters. To select menus: Press Set for 8 seconds – “0” flashes. Press and release Set, first menu name (CON) is shown. Press UP or Down button to scroll through the five menu names. To exit menu list - press Set and Down together or wait one minute. To select and adjust parameters: When required menu name is shown on display (see above), press Set; first parameter code will be displayed. Press UP or DOWN buttons until required parameter code is shown then press Set; parameter value is displayed. Use UP or DOWN buttons to adjust parameter value, then press Set to enter. To exit parameters and return to menu list, press Set and DOWN together or wait one minute. MENU DESCRIPTION UNITS RANGE DEFAULT COASTAL CON Set r0 c2 c3 Ignore those parameters not shown below Set point – Desired box or cabinet temperature (See 5) Differential – Degrees above set point before compressor start. On-time of emergency cycle when sensor probe is faulty (see 7) Off-time of emergency cycle when sensor probe is faulty (see 7) Degrees Degrees Minutes Minutes r1 to r2 0.1 to 20 0 to 999 0 to 999 3.0 1.0 5 5 40 2.0 15 15 d0 d2 Ignore all dEF parameters except those shown below Sets thermostat as either a heating or cooling control Maximum defrost time. Setting this to “0” ensures no defrost. Minutes Re/in 0 to 240 Re (cool) 30 Re (cool) 0 PrO P0 P1 Temperature scale – Celsius or Fahrenheit Probe (sensor) calibration Degrees C or F -20.0 to 20.0 C 0 F 0 ALA A1 A2 A6 A7 Ignore those parameters not shown below Maximum alarm temperature Minimum alarm temperature Time delay before alarm is active after starting system Time before alarm is activated after max or min temp is reached Degrees Degrees hrs/mins hrs/mins 0.1 to 99.9 0.1 to 99.9 0.0 to 18 0.0 to 18 8.0 8.0 1.1 1.1 99.9 99.9 1.1 1.1 dEF Ini Ignore all Ini parameters except H0 - General Reset. (10) PO Box 4535 Annapolis MD 21403 USA – www.frigoboat.com – [email protected] – 301-352-5738