Honeywell PCR-100 Electronic thermostat Instruction Manual

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PCR-100  

PCR-110  

Installation and Operating  

Instructions  

Electronic thermostat  

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General	Details
Name	Honeywell PCR-100 Electronic thermostat Instruction Manual
Make	Honeywell
Language	English
Filetype	PDF (Download)
File size	0.91 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Honeywell

Honeywell PCR-100 Electronic thermostat Instruction Manual Overview

Summary of Contents

• Page 1: Installation and operating instructions Electronic thermostat
• Page 2: Unpacking the unit and conditions of use General instructions Use and function Use for the purpose intended Function Safety Sources of danger Safety precautions Installation and commissioning Mechanical installation Electrical installation Operation of the controller Switching on the operating voltage Display Key functions Adjusting the cold store temperature Manual defrost Programming Input parameters and ranges Sensor calibration Maintenance Appendix Alarm messages Conditions of warranty Technical data
• Page 3: If the unit is used for purposes other than those stated here, it shall not be considered to be use for the purpose intended. Only connect sensors supplied with the unit. If a replacement sensor is required, only use sensors of the same type. The controller is not intended for use in vehicles because the possible operating voltage ranges, interference level and environmental operating exceed the limits for which the controller can be used. PCR-100 and PCR-110 are general-purpose thermostats, each with a relay output and wide temperature control range (–55 °C to +50 °C). The controllers have different housings: PCR-100 has a modular housing for 35 mm standard rails, while PCR-110 has a “snap-in” installation housing. Control performance includes 2-step, on/off, with reversible direction for heating and refrigerating. Defrost option for chilling systems if continuous operation of the evaporator fan is foreseen in the switching box. Data is not lost, even if there is a power failure, for at least 10 years. Caution - Mains voltage! Never expose the unit to water or moisture. Even if the control circuit is switched off, high voltage may still be applied to the controller.
• Page 4: If the unit cannot be operated without the risk of danger, it must be taken out of service and precautions taken so that it cannot be switched on again unintentionally. This applies, in particular, if the housing has damage which is visible, the unit is no longer operational, or it has been stored for a long time in unfavourable conditions. The unit must not be opened. If it is thought that the unit may be defective, send it back to the dealer or manufacturer with a precise description of the fault. All electromagnetic loads should be interference suppressed directly at the coil with RC elements. Please note the maximum contact rating of the relays and terminals. Sensor leads are to be routed separately from mains voltage wires; the clearance should be at least 5 cm. Sensor leads must not be routed in multiple cables with other leads carrying mains voltage, otherwise the system may malfunction. Tighten the terminals carefully; excessive strain will result in damage to the controller. DIN Standard modular housings to be mounted on a standard rail include housing with 2 mounting tabs and housing with 1 mounting tab. To remove the unit from the rail, press in the lower mounting tab with a screwdriver and lift the unit.
• Page 5: Snap-in housings fit the unit in an aperture of 28.5 x 70.5 mm and secure it with the relevant mounting frame. Housings with terminal box coverplate have a maximum wall thickness of 22 mm. Housings without terminal box cover plate have a maximum wall thickness of 18 mm. For walls thicker than 10 mm, remove lateral plastic spacers from the mounting frame. The side screws must be tightened carefully for the final fixing of the unit. Use a cable clamp to secure sensor T1 in a suitable position. Caution: The mains voltage and system frequency must match the nominal values on the device’s rating plate. Work on electrical systems must be performed by qualified personnel. Relevant local safety regulations must be observed. Wiring diagram.
• Page 6: Instructions for PCR connection must not exceed 10 A. Pay attention to the contact loading of the relay (8A/5A resistive load, 2A/1A inductive load). The maximum tested sensor cable length is 50 m, with a minimum cross section of 2 x 0.75 mm2. Solder the extension cable to the sensor cable to prevent contact resistances. It is advisable to use shielded sensor extension cables. All shields must be routed at the side of the controller to one earth/protective potential. The extension cable shield must not be connected on the sensor side to avoid bonding currents. The controllers are designed with a high degree of immunity to interference. If the local interference level exceeds the immunity, data might get lost and the controller switches to preprogrammed settings. In such cases, means to suppress interference have to be improved (RC-elements, shielded lines).
• Page 7: Switching on the operating voltage The controller is started by means of a control switch provided by the customer. The first time the controller is started, pre-programmed setting values are used which can be adapted later. If alarm “AL 2” is displayed when the controller is switched on, this can be cleared by pressing the key. Display During normal operation, the current cold store temperature is displayed. In the event of an alarm, the most recent alarm message and the cold store temperature are displayed alternately. Two spot indicators show the switching status of the relays during operation. Functions of keys Never operate the keys with sharp objects. Press and hold down key to display the setpoint value.
• Page 8: Input values are always changed using the key held down. Access to the programming level is by pressing the key at the same time for 5 seconds. To exit from the programming level and save the data, press the key after the last input parameter. If no key is pressed in the programming level for 10 minutes, this mode will be exited without the data being saved. Do not display altered parameter data before saving the data, as it would be reversed to its original value in the process. Adjustment is possible within the limits of the input parameters E01 and E02. The factory setting is +4°C. Press and hold down the key for 5 seconds to initiate the manual defrosting process. If parameter E09 is set to 0, no defrosting will be started. Use the key to select parameters in the programming level.
• Page 9: Input parameters and input ranges: Cold store temperature difference: 1 to 20 K, preset 2 K. Min. permissible cold store temperature: –55 °C to +50 °C, preset –55 °C. Max. permissible cold store temperature: E03. Delay time, relay energizing: 0 to 15 mins, preset 5 mins. Alarm temperature difference: –50 K to +50 K. An alarm is given if the set temperature difference E04 is negative or positive, indicating too cold or too warm conditions in the refrigerated area. Any change of cold store set point value changes the alarm temperature. If E04 is set to 0, no alarm will be given. Alarm delay time: E05. Sensor calibration: T1. Mode selection: 1 = Cooling, 2 = Heating. Time between 2 defrost cycles: 1 to 24 hours, preset 8 hours.
• Page 10: If the time interval between two defrost cycles is changed when the system is in operation, the new time interval will not be applied until after the next time defrosting has occurred. Defrost time (0 = no defrosting) ranges from 0 to 99 minutes. During the defrosting process, the last current temperature before defrosting started is retained in the display. After defrosting, the display returns to the instantaneous temperature when the stored value is reached again or after a set time has elapsed. Operating of relay if sensor T1 is defective can be set to different states: de-energized, permanently energized, or on/off in sequence. The sensor can be calibrated. Additional line resistance caused by sensor cable extension results in a change in the temperature display. To calibrate the sensor, measure the temperature with a calibrated thermometer or submerge the sensor in ice water. Compare the measured temperature with the temperature shown on the unit display. If the measured temperature is lower than the displayed temperature, set the negative difference as the programming value.
• Page 11: If the measured temperature is higher than the one displayed, set the positive difference as the programming value. The temperature display is then corrected by the set value. The controller does not require any maintenance. It does not have any fuses, so if brief voltage spikes occur, the refrigeration system will not stop operating for a prolonged period. Only a dry anti-static cloth may be used to wipe clean all plastic parts. Do not use water or cleaning agents containing solvents. If an alarm occurs, the alarm output will be activated and on the display a code will alternate with the cold store temperature. Data lost from program memory will result in the preset values being used as an emergency program, with the setpoint set to +4 °C. Limit value at sensor T1 exceeded and delay time elapsed. The sensor temperature is over 50 °C or below –55°C. The specified setpoint value is outside the limits. Temperature sensor T1 may have a short circuit or break in wiring. Press the key to clear the alarm.
• Page 12: Conditions of warranty Warranty is provided for a period of 24 months, starting at the date the item was delivered. Proof of this should be furnished in the form of a delivery note or invoice. All functional faults caused by poor workmanship or faulty materials will be repaired free of charge during the warranty period. More extensive claims, in particular for consequential damage, are excluded. Damage or malfunctioning caused by the equipment being handled incorrectly or by non-compliance with the operating instructions shall not be covered by the warranty. The warranty shall be invalidated if any work is carried out on the appliance. Technical data Mains voltage/frequency: 230 V AC, 10%, 50/60 Hz Rated wattage: 2.1 watts Display: 3-digit, 7-segment LED, red, 14.2 mm Measuring range: –55 to +50 °C Outputs: 1 relay with changeover contact, 8 A, 230 V AC, resistive load.
• Page 13: Control performance: Display accuracy: Operating conditions: 0 to 50 °C, 30 to 85 % R.H., excluding dew Storage temperature: –20 to +80 °C Data back-up: Non-volatile memory (EEPROM) Sensor: 1 PTC Sensor accuracy: 2 % Housing: PCR-100: L x W x H = 85 x 70 x 61 mm Protective rating: Housing: IP 20, Front panel: IP 52 Only operate the unit in dry places.
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