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Penn MR5 Series, Technical Bulletin

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Note:

• Some of the following alarms are available only when the controller uses the corresponding

binary input or feature. For example, the QREV and PSHC alarms are available only after you

pair the MR5 controller with a QREV and PSHC.

• To make the door open and refrigerant leak optional alarms available and configurable on

the alarm setup screens, select the optional alarm type on the binary input setup screens.

Table 23: List of alarms and alarm true conditions

Alarms

Alarm TRUE Condition

The SN1 temperature is greater than the high temperature alarm threshold

value that you defined for a period of time equal to or greater than the alarm

delay.

High

Temperature

The SN3 temperature is greater than the high temperature alarm threshold

value that you defined for a period of time equal to or greater than the alarm

delay.
The SN1 temperature is less than the low temperature alarm threshold value

that you defined for a period of time equal to or greater than the alarm delay.

Low

Temperature

The SN3 temperature is less than the low temperature alarm threshold value

that you defined for a period of time equal to or greater than the alarm delay.
SN1 is in a state of failure.
SN2 is in a state of failure.

Sensor Failure

SN3 is in a state of failure.

PSHC Comm

Loss

Communication is lost with the PSHC.

PSHC Status

The PSHC status triggers an alarm.

Door Open

The door switch indicates that the door is open for a period of time equal to

or greater than the alarm delay. A different manufacturer can supply the door

switch.

Refrigerant

Leak

The refrigerant leak detector indicates a leak. A different manufacturer can

supply the leak detector.

Alarm actions

• Alarm Relay: The alarm relay energizes when any alarm condition is true. The alarm relay de-

energizes when you acknowledge the alarm locally or when the condition is no longer true.

• Local UI: The 

Alarm

 icon on the UI illuminates when any alarm condition is true or requires

acknowledgment.

Alarm settings

The following table provides information about the alarm parameters and their corresponding

descriptions:

53

MR5 Series Panel Mount Case Controller Technical Bulletin

Discontinued

Summary of Contents for MR5 Series

Page 1: ...MR534 Johnson Controls www penncontrols com 2019 08 13 MR5 Series Panel Mount Case Controller Technical Bulletin LIT 12013019 D i s c o n t i n u e d...

Page 2: ...2 MR5 Series Panel Mount Case Controller Technical Bulletin D i s c o n t i n u e d...

Page 3: ...iled procedures 15 Controller UI 15 Standard and conditional screens 18 Workflow for setting up the controller 18 Navigating the controller screens 19 Navigating the high level status and setup start...

Page 4: ...4 Info field codes 54 Connecting to a communications network 57 External communications adapter connection 57 Network and device requirements and limitations 58 Communications adapter wiring connectio...

Page 5: ...me de contr le doit int grer des dispositifs de protection suppl mentaires Veiller dans ce cas int grer de fa on permanente d autres dispositifs tels que des syst mes de supervision ou d alarme ou de...

Page 6: ...re 2 shows the panel cut out dimensions required to insert the controller into the panel Figure 1 MR5 Controller dimensions mm in Figure 2 MR5 Controller panel opening dimensions mm in MR5 Series Pane...

Page 7: ...e sizes Terminal number Terminal block label Terminal Description function and requirements Required wire size 1 SN3 SN3 is an optional temperature sensor Configure SN3 as a case averaging sensor with...

Page 8: ...output is 0 VDC to 10 VDC for termination resistance greater than 1000 ohms Signal output is 4 mA to 20 mA for termination resistance less than or equal to 300 ohms 0 30 mm 2 to 1 50 mm 2 22 AWG to 1...

Page 9: ...I2 Open or closed state detection Dry contact switch Note Do not apply any voltage to BI terminals 19 20 and 21 Connect only user supplied dry contact switches to these terminals 0 34 mm 2 to 1 5 mm 2...

Page 10: ...Interval is the time between the start of a defrost duration and the start of the next defrost duration Defrost types The controller provides defrost control for off cycle defrost systems on medium te...

Page 11: ...mination sensor Temperature sensor defrost termination Temperature sensor defrost termination uses the defrost termination sensor SN2 mounted on the evaporator coil to sense the coil temperature and t...

Page 12: ...n coincides with the time that the evaporator reaches the termination temperature The defrost sensor determines when the defrost duration is complete See Adaptive defrost setup parameters for more inf...

Page 13: ...al on off refrigeration cycle based on load demand 1 ASD overrides load demand 2 When ASD elapses the existing demand closes the relay on 3 ASD starts when the relay opens off 4 Compressor relay cycli...

Page 14: ...min to 15 min for the evaporator to freeze any remaining moisture before the evaporator fans turn on The following figure shows the controller relay states during defrost duration drip time delay and...

Page 15: ...of the system status and alarms The Defrost and Alarm icons also function as keys You can use these keys to initiate unscheduled defrost cycles and clear system alarms You can also use the four touch...

Page 16: ...lues during setup Displays four dashes during anti short cycle delay defrost duration drip time and fan delay countdowns When you select or edit a numerical parameter value the status field displays a...

Page 17: ...ws yellow or is off the alarm relay is open The Alarm icon also functions as a key To acknowledge any active alarms press the Alarm key 11 Evaporator fan icon The Evaporator fan icon indicates the sta...

Page 18: ...ctory default selections and values already entered on the system screens In most applications you must change the factory default selections and values to meet the specific refrigeration and defrost...

Page 19: ...screens See the second row in Figure 8 3 Press DOWN and UP to move through the high level status and setup start screens 4 Press SET to select a high level status or setup start sceen 5 Press DOWN and...

Page 20: ...Navigating the high level status and setup start screens Figure 8 High level status and setup start screens MR5 Series Panel Mount Case Controller Technical Bulletin 20 D i s c o n t i n u e d...

Page 21: ...ens press SET For more information see Viewing the status n a QREV PSHC STATUS Conditional screen The QREV PSHC STATUS start screen is the top level start screen for accessing and viewing the QREV and...

Page 22: ...ALARM SETUP The ALARM SETUP screen is the top level start screen for setting up the controller s alarms To go to the alarm setup screens press SET For more information see Setting up the alarm setup p...

Page 23: ...nsor SN2 Current temperature value SN3 TEMPERATURE This screen displays the temperature at sensor SN3 Current temperature value CASE DEFROST AVG TEMPERATURE Conditional screen The weighted average tem...

Page 24: ...OW TEMP ALARM Conditional screen This screen displays the status of the SN3 low temperature alarm The alarm condition is true if the temperature of SN3 is below the threshold value for a period of tim...

Page 25: ...ns To navigate the screens press DOWN or UP The following table describes the QREV and PSHC status screens Table 9 QREV PSHC status screen descriptions values and selections Screen name Description Va...

Page 26: ...te and time on the controller navigate to the high level SYSTEM SETUP start screen and press SET to go to the DATE TIME screen To move through the date and time screens press DOWN and UP Figure 9 Syst...

Page 27: ...ime period select AM or PM and press SET Note The PERIOD screen displays only if you select the 12H time format on the TIME FORMAT screen AM PM To set the date format press SET n a DATE FORMAT Select...

Page 28: ...press SET then navigate to the screens in Table 11 The selections you make on the following setup screens determine many of the setup screens that appear on the REFRIGERATION SETUP and DEFROST SETUP...

Page 29: ...press SET n a To set the sensor type for SN2 press SET n a SN2 TYPE Select A99 NTC or NON none and press SET A99 NTC NON To set the offset value for SN2 press SET n a SN2 OFFSET Conditional screen Sel...

Page 30: ...GAS To change the defrost termination type press SET DEFROST TERM TYPE Conditional screen Select time based defrost termination or temperature based defrost termination SN2 To save the selection pres...

Page 31: ...led and connected to the controller or not select YES or NO and press SET Note If you select NO the QREV PSHC SUPERHEAT screen and the QREV PSHC REFRIGERANT screen do not display YES NO To set the sup...

Page 32: ...SET A to Z 0 to 9 Space To set the units of temperature measurement press SET n a UNITS Select F Fahrenheit or C Celsius and press SET F C To set the display brightness level press SET n a DISPLAY BRI...

Page 33: ...high level REFRIGERATION SETUP screen and press SET To move through the refrigeration setup screens and options press DOWN and UP Figure 14 Refrigeration setup screens navigation map Table 14 Refrige...

Page 34: ...or more information ON OFF AVG To set the ASD time for the compressor press SET n a ANTI SHORT CYCLE DELAY Select the delay time value from the range 0 min to 12 min and press SET 0 min to 12 min To s...

Page 35: ...f the termination type all defrost cycles terminate when the system reaches the defrost duration value 0 min to 99 min To set the drip time delay press SET n a DRIP TIME Conditional screen Select the...

Page 36: ...he evaporator fans waits before turning on after the compressor relay closes post defrost duration and driptime delay 0 min to 15 min To set the defrost schedule type press SET n a DEFROST SCHEDULE TY...

Page 37: ...edule the defrost cycles to start at equal intervals after the first defrost time select AUT OMA automatic on the DEFROST SCHEDULE screen To manually schedule the defrost cycles to start at preferred...

Page 38: ...referred number of defrost cycles from the range 0 to 8 and press SET 0 cycles to 8 cycles To set the start time for the first defrost cycle press SET n a FIRST DEFROST TIME Conditional screen Set the...

Page 39: ...ble 17 See Adaptive defrost setup parameters for more information Note To enable the ADAPTIVE DEFROST setup start screen navigate to the system setup menu flow Set SN3 MEASUREMENT to defrost and set t...

Page 40: ...the most appropriate defrost duration for your system 1 min to 99 min To set the maximum time between defrost cycles press SET n a MAX TIME BETWEEN DEFROST Conditional screen To set the maximum time...

Page 41: ...s Screen name Description Value or selection BI 1 This screen is the BI 1 setup start screen To go to the BI1 terminal setup screens press SET n a To set a binary input mode for BI1 press SET n a MODE...

Page 42: ...nt leak mode If you select refrigerant leak mode for a binary input the mandatory action for that binary input is system shutdown Door open NOR MAL FAN OFF COO OFF AUX ON To select an action delay tim...

Page 43: ...screens in Figure 8 lead to an alarm setup menu See Binary inputs and alarms for more information Note Except for the THRESHOLD screen all alarm setup menus have an identical structure Only high and...

Page 44: ...Figure 20 Alarm setup navigation map part 2 of 4 MR5 Series Panel Mount Case Controller Technical Bulletin 44 D i s c o n t i n u e d...

Page 45: ...Figure 21 Alarm setup navigation map part 3 of 4 45 MR5 Series Panel Mount Case Controller Technical Bulletin D i s c o n t i n u e d...

Page 46: ...n a To enable or disable the alarm press SET n a ENABLE Select YES or NO and press SET YES NO To set the threshold for a temperature alarm press SET n a THRESHOLD Conditional screen Select the thresho...

Page 47: ...NO To set the realarm interval press SET n a REALARM INTERVAL Conditional screen Select the interval value from the range 0 min to 99 min and press SET 0 min to 99 min SN1 LOW TEMP ALARM Conditional...

Page 48: ...nsert a USB drive into the controller within 15 seconds The file export begins automatically n a To import a file press SET n a CONFIG FILE IMPORT To confirm a file import select YES and press SET YES...

Page 49: ...type Units of temperature Celsius or Fahrenheit Display brightness System name On the system setup screens you can also create an access password download controller firmware updates and set up the QR...

Page 50: ...f 30 F displays and controls as 27 F QREV and PSHC setup The controller can monitor and control an optional PENN QREV and PSHC The QREV is a proportional control expansion valve that uses microelectro...

Page 51: ...on temperature after the expected defrost duration time elapses adaptive defrost shortens the next defrost interval Maximum time between defrosts Maximum time between defrosts defines the maximum numb...

Page 52: ...ler Refrigerant leak System shutdown The system remains shut down as long as the refrigerant leak condition persists A system shutdown takes priority over the normal control of the compressor defrost...

Page 53: ...delay Low Temperature The SN3 temperature is less than the low temperature alarm threshold value that you defined for a period of time equal to or greater than the alarm delay SN1 is in a state of fai...

Page 54: ...ning condition is active in this situation The Alarm icon glows yellow to indicate an alarm warning Alarm warnings do not cause the alarm relay to energize and the system does not add an alarm to the...

Page 55: ...n the auxiliary relay AVG Average Select to set up the SN1 Sensor Failure Mode for averaging When the system detects an SN1 failure condition the controller cycles the cooling system at an on off freq...

Page 56: ...coefficient temperature sensor OFF Off SN1 Sensor Failure Mode When you select OFF and the system detects a sensor failure condition the controller ignores the sensor and setpoint control and maintain...

Page 57: ...s is an application specific controller It supports connection to the following RS485 MS TP BACnet communications networks Standard BACnet network Verasys network Use the external communications adapt...

Page 58: ...enables a network connection to RS485 MS TP BACnet networks including Johnson Controls Verasys networks 0 14 mm 2 to 0 34 mm 2 26 AWG to 22 AWG stranded wires and twisted leads cable Wiring the RS485...

Page 59: ...rk trunk 2 Daisy chained devices on the RS485 network trunk 3 Isolated shield connection terminal 4 To the next device on the RS485 network trunk 5 220 ohm EOL resistor Connecting the EOL resistor The...

Page 60: ...creens complete the following steps 1 On the HOME screen press and hold MENU ESC for 2 seconds to go to the STATUS start screen 2 Press DOWN to go to the SYSTEM SETUP start screen and press SET 3 Pres...

Page 61: ...perature AI10218 45 F to 140 F 42 C to 60 C R Average Defrost Temperature AI10428 45 F to 140 F 42 C to 60 C R Compressor Relay BO10446 Inactive Active 0 Inactive 1 Active R Defrost Relay BO10449 Inac...

Page 62: ...9 Unknown 20 Unknown 21 Unknown R Binary Input 1 State BI10020 Binary Input status 0 Open 1 Close R Binary Input 2 State BI10416 Binary Input status 0 Open 1 Close R Binary Input 1 Mode MV10461 1 None...

Page 63: ...to 24 h W Blackout Duration AV10325 0 to 240 min W Reset History MV10412 1 No 2 Yes W Defrost Schedule MV10383 1 Automatic 2 Manual W Defrost Scheduled Per Day AV10326 Number of defrosts in a day 0 to...

Page 64: ...n Sec R Eighth Defrost TV10819 00 00 00 to 23 59 59 Hr Min Sec R QREV PSHC Alarm Status BI10368 0 Normal 1 Alarm R Supported QREV PSHC Communication Loss BI10365 0 Normal 1 Alarm R Supported Alarm Ref...

Page 65: ...240 VAC 240 VAC Resistive amperes 8 A 8 A 8 A 2 A Inductive amperes 3 A 3 A 3 A n a Pilot duty VA 72 VA 125 VA 125 VA n a Number of cycles 6K Table 32 SPST evaporator fan or auxiliary relay ratings b...

Page 66: ...ties and specifications MR5 Series Panel Mount Case Controller Product Bulletin LIT 12013106 MR5 parts accessories and product code numbers MR5 Series Panel Mount Case Controller Catalog Page LIT 1901...

Page 67: ...CP data or to install firmware upgrades Dimensions H x W x D 58 4 mm 2 3 in x 102 00 mm 4 0 in x 111 10 mm 4 37 in Weight 280 grams 0 6173 lb Compliance North America United States UL Listed SDFY SA51...

Page 68: ...micro disconnection type 1 B Heat and fire resistance category D Rated impulse voltage 2500 V Over voltage category II Pollution degree 4 front face 2 back housing Table 37 ADPT MR5 RS485 Network Comm...

Page 69: ...sor cable sheath Type A99BA shielded PVC cable Type A99BB PVC cable Type A99BC high temperature silicon cable Wire gauge 22 AWG 0 33 mm 2 Ambient storage conditions Type A99BA and A99BB 40 C to 105 C...

Page 70: ...separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV te...

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