MR3CCUHV Temperature/Defrost Control

Master Catalog 125 Temperature Controls Section A Product/Technical Bulletin Issue Date 0401 MR3CCUHV Temperature/Defrost Control The MR3CCUHV Temperature/Defrost Control is designed to control the temperature and defrost cycles on commercial refrigeration and freezer units. Hot gas or electric heat defrost may be selected. Defrost termination may be based on either time or temperature. The MR3CCUHV Temperature/Defrost Control incorporates control functions such as temperature management, defrost management, evaporator fan management, and alarm management. One convenient package consolidates the functions of a thermostat, a digital temperature readout device, a timer, and a defrost termination switch. Figure 1: MR3CCUHV Panel Mount Electronic Temperature/Defrost Control Features and Benefits Single Package Control Mounting Flexibility Easily Readable Display Accurate, Interchangeable Temperature Sensor Heavy Duty Relays Provides the functionality of multiple control components at a cost-effective price. Allows control and relay board assembly to be mounted up to 18 in. (46 cm) apart. Displays both main sensor and evaporator sensor temperature quickly; helps troubleshoot system; provides alarm codes. Provides accurate control performance with up to 300 feet (91 m) of sensor wiring. (An offset is provided for longer wiring.) Allows direct control of compressors, fans, and heaters; reduces installation time. 2001 Johnson Controls, Inc. 1 Part No. 24-7664-2128, Rev. www.johnsoncontrols.com Code No. LIT-125189

Application and Operation Overview IMPORTANT: The MR3CCUHV Temperature/Defrost Control is intended to control equipment under normal operating conditions. Where failure or malfunction of the MR3CCUHV Control could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls) or systems (alarm or supervisory systems) intended to warn of, or protect against, failure or malfunction of the MR3CCUHV Control must be incorporated into and maintained as part of the control system. FCC Compliance Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the Federal Communications Commission (FCC) Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his/her own expense. Canadian Compliance Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Control Capabilities The MR3CCUHV Temperature/Defrost Control consolidates the functions of a temperature control, a digital temperature readout, a defrost cycle timer, and a defrost termination device. The MR3CCUHV Temperature/Defrost Control has an extensive list of user-programmable settings to manage temperature, alarms, and evaporator fans, as well as control the defrost cycle and provide response to a binary input. The MR3CCUHV Temperature/Defrost Control consists of the following components: MR4PM12C-12C Temperature/Defrost Control with four 18 in. (46 cm) color-coded wires two A99BB-200C temperature sensors relay board assembly (circuit board mounted on a high-temperature polycarbonate mounting bracket) The MR3CCUHV Temperature/Defrost Control provides direct control in many refrigeration applications. See electrical ratings in Tables 7-9 for more information. The MR3CCUHV Temperature/Defrost Control may be programmed to perform the following functions. Temperature Management Setpoint and Differential settings establish the MR3CCUHV Temperature/Defrost Control temperature control range. Cycle Delay provides a set time interval between compressor restarts to avoid excessive cycling. Deep Freeze Time controls the duration of a manually-initiated freeze cycle. Sensor Failure Operation initiates a predefined response to a temperature sensor failure. Alarm Management High and Low Temperature Alarms provide notification of temperatures that exceed user-designated high and low limits. Alarm Time Delay keeps short-duration temperature changes from triggering an alarm. Alarm Differential keeps the alarm from cycling rapidly on and off due to minor temperature fluctuations. Defrost Cycle Management The MR3CCUHV Temperature/Defrost Control can perform either hot gas or electrical defrost and can terminate the defrost cycle on the basis of evaporator temperature or time. 2 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin

Evaporator Fan Management Evaporator fans either can run continuously or run only when the compressor is on. Fan Start-up Delay can be set to follow either time-based or evaporator temperature-based startup after defrost. A reversible motor may be wired to run in reverse to bring warm air over the evaporator coils in a timed defrost application. D imensions 3/8 3-1/2 (89) 2 (51) 3/4 (19) (10) 1-13/16 (46) Binary Input Reponse Binary Input Function allows the user to select which output relays respond to a binary input (switch) if the binary input contacts are open for a time (minutes) longer than the Binary Input Time Delay. 6 (152) 5-1/4 (133) Additional Features Keyboard Locking disables/enables change of the setpoint and other functions, reducing accidental or unauthorized changes of the control settings. Self-test Procedure initiates a cycle of all outputs and tests all LEDs. Manual Deep Freeze Cycle manually initiates a deep freeze cycle, which is useful when loading a cold room or a display cabinet. Manual Defrost interrupts normal control operation and initiates an immediate defrost cycle. For additional information about control functions and how to program them, see Programming the Control and Defining the Functions in this document. Control Module Front Panel The control module has a Light-Emitting Diode (LED) display and buttons for entering programming information and activating various features. The display has three LED digits. It displays a temperature range from -40 to 176 F (-40 to 80 C) in increments of 1F or C. The display also features three status LEDs. Evaporator Fan Status LED Manual Defrost Button Enter Button Defrost Status LED Compressor Output Status LED Up Button Down Button 3/8 (10) 3/16 (5) Figure 3: Relay Board Assembly Dimensions, in. (mm) 2-3/4 (70) 3 (75) 2-5/16 (58) 1-3/8 (35) 2-11/16 (68) Figure 4: Control Module, in. (mm) 1/4 (6) 2 (50) 78-3/4 (2000) 1-1/8 (28) Figure 5: A99BB-200C Sensor, in. (mm) Figure 2: Control Module Front Panel A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin 3

M ounting The MR3CCUHV Temperature/Defrost Control is not position sensitive, but should be mounted for convenient wiring and adjustment. Mount the relay board assembly and the control module within 18 in. (46 cm) of each other. Mounting the Relay Board Assembly Before mounting the relay board assembly, ensure that there is sufficient space for the relay board. Follow these steps to mount the relay board assembly: 1. Hold the relay board assembly against the surface and use as a template to trace the mounting slots. 2. Drill holes for mounting screws in the slots indicated. 3. Use four screws (#8 or #10 size) to mount the relay board assembly. Mounting the Control Module Before mounting the control module, ensure that there is sufficient space behind the mounting surface. At least 2-3/4 inches (70 mm) are needed. Follow these steps to mount the control module: 1. Cut a hole 1-3/16 by 2-13/16 inches (29 by 71 mm). 2. Remove retaining clip from the back of the control module. 3. Disconnect the wiring from the control module and the relay board assembly. 4. Insert the control into the hole. W iring! WARNING: Shock Hazard. To avoid the risk of electrical shock or damage to equipment, disconnect all power supplies before wiring any connections. Wiring Sensors and Binary Inputs Wire the sensors and binary input (if used) as shown in Figures 6 and 7. The Sensor (S1 or S2) and Sensor Common (SC) wires are interchangeable when using the A99B temperature sensors. The binary input shares a common terminal with the sensors. NOTE: All circuits must have a common disconnect and be connected to the same pole of the disconnect. NOTE: Dark grey boxes indicate unused terminals. 12VAC V1 V2 Power Supply O1 O2 Outputs To Relay Board Internal to Control Binary Input (Switch) D S2 Evaporator Temperature Sensor SC S1 Sensor Common Figure 6: Wiring the Control Module Loosen screw to open terminal; tighten screw to secure wiring. Main Temperature Sensor 5. Install retaining clip and adjust for tightness. 6. Reconnect wiring from control module to relay board assembly. See Table 1. Table 1: Control Module and Relay Board Assembly Wire Terminal Designations Wire Color Control Module Relay Board Assembly Black V1 V1 V1 V2 O1 O2 V1 V2 O1 O2 D S2 SC S1 D S2 SC S1 White V2 V2 Red O1 O1 Green O2 O2 Insert wiring here. Note: Dark grey boxes indicate unused terminals. Figure 7: Rear View of the Control Module 4 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin

Use Temperature Sensor Offset to compensate for sensor leads longer than 300 ft (91 m). See Table 2 and Temperature Management Functions: Temperature Sensor Offset in the Defining the Functions section of this document. Table 2: Sensor Wire Size and Length Wire Size and Length 18 AWG 20 AWG 22 AWG Offset Recommended wire gauge is 12 AWG with an insulation rating of 75 C for motor loads up to 16 FLAs and non-inductive loads up to 20 amperes. Maximum recommended wire length is 50 feet (15 m). All circuits must have a common disconnect and be connected to the same pole of the disconnect. 300-599 ft (91-183 m) 600-899 ft (183-274 m) 190-374 ft (58-114 m) 375-564 ft (114-172 m) 120-239 ft (36-73 m) 240-349 ft (73-107 m) 1F (1C ) 2F (2C ) Relay Terminal Block 900+ ft (274+ m) 565+ ft (172+ m) 350+ ft (107+ m) 3F (3C ) Wiring the Relay Board Assembly Follow these wiring guidelines: All wiring must conform to the National Electrical Code and local regulations. Make all wiring connections using adequate gauge copper conductors only. Recommended wire gauge is 14 American Wire Gauge (AWG) for motor loads up to 12 Full Load Amperes (FLAs) and non-inductive loads up to 15 amperes. L1 Terminal Labels on Circuit Board L2 FNO 120 240 DH1 DH2 NOT USED FNC CP1 CP2 NOT USED Figure 8: Relay Board Terminal Block Internal to Relay Board Assembly L2 NOT USED 240 120 FNO FNC CP1 CP2 DH1 DH2 Evaporator Fan This wiring should be used only with reversible fan motors to reverse airflow during defrost. Compressor Defrost Heater or Solenoid Valve Coil Figure 9: Typical 240 VAC Relay Board Assembly Wiring Connections A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin 5

Neutral 120 Internal to Relay Board Assembly 240 120 FNO L2 FNC CP1 CP2 DH1 DH2 Evaporator Fan This wiring should be used only with reversible fan motors to reverse airflow during defrost. Compressor Defrost Heater or Solenoid Valve Coil Figure 10: Typical 120 VAC Relay Board Assembly Wiring Connections Programming the Control Using the Control Module During normal operation, the display shows the main sensor temperature. See Figure 2. To use the control module: Press Up or Down to scroll through the main sensor temperature, evaporator sensor temperature and the binary input status. Press Enter to view the Setpoint. After 15 seconds of inactivity, the display returns to main temperature display. Changing the Setpoint To change the setpoint: 1. Press and hold Enter for approximately three seconds. 2. Release Enter when the new Setpoint value displays. 3. Press Up or Down to display the new Setpoint value. 4. Press Enter to save the new setting. Note: If Enter is not pressed, the new Setpoint value is not saved, and the control reverts to the previous Setpoint value. Unlocking or Locking Access to Programming A keystroke sequence disables or enables changes to Setpoint and other settings, reducing unauthorized modifications to control settings. To unlock or lock access to programming: 1. In sequence, press and hold Enter, Up, and then Down. 2. Hold these buttons until - - - is displayed. 3. Continue holding until the sensed temperature displays (approximately 10 seconds). 6 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin Changing Other Function Values To change other function values: 1. Press and hold Enter for about 10 seconds. 2. The code for Differential displays. See Table 4. 3. Press Up or Down until the desired function displays. See Table 4 and Defining the Functions. 4. Press Enter. The function s existing value displays. 5. Press Up or Down until the desired setting value shows. 6. Press Enter to save the new value. After ten seconds of inactivity, the display returns to normal operation. Note: If Enter is not pressed, the new value is not saved, and the control reverts to the previous saved value.

Defining the Functions Temperature Management Functions Setpoint is the primary temperature setting ( F or C) programmed by the user. When Setpoint is reached on a temperature drop, the Normally Open (NO) compressor relay contacts open, ending the On cycle. Differential is the difference ( F or C) between Setpoint and the temperature at which the compressor relay contacts close, initiating the next On cycle. Temperature Rise Setpoint N. O. Contacts CLOSE Differential N.O. Contacts OPEN Figure 11: Setpoint and Differential High and Low Setpoint Stops are temperature values ( F or C) that restrict how high or low Setpoint may be adjusted. Setpoint Stops deter accidental over-adjustment of Setpoint. Cycle Delay establishes the minimum time (minutes) between subsequent On cycles of the compressor. Cycle Delay Figure 12: Cycle Delay Load Demand Output Status Deep Freezing Time overrides Setpoint temperature control and closes the compressor relay contacts for a user-defined time (minutes). Typically, this function is used to run the compressor continuously during periods of high refrigeration load to bring the sensed temperature down below Setpoint and deep-freeze the product. Sensor Failure Operation allows selection of how the compressor relay contacts operate in the event of a sensor-related failure. The compressor can remain Off, remain On, or cycle based on the average of the last four cycles. In determining the average of the last four cycles, the control ignores deep freezing cycles, defrost cycles, and the first cycle after a deep freeze cycle or a defrost cycle. Temperature Sensor Offset allows compensation for temperature differences between actual and displayed temperature, such as when using long sensor leads. See Table 2 to determine the temperature value to compensate for long sensor lead extensions. Temperature Units Used allows selection of Fahrenheit or Celsius temperature scale. Display Refresh Rate establishes the time delay (seconds) between updates of the temperature display. Alarm Management Functions High Temperature Alarm establishes the temperature relative to Setpoint ( F or C) at which the control goes into a high temperature alarm condition. (The temperature value is added to the Setpoint.) Low Temperature Alarm establishes the temperature relative to Setpoint ( F or C) at which the control goes into a low temperature alarm condition. (The temperature value is subtracted from the Setpoint.) High and Low Temperature Alarms are disabled during defrost and for 20 minutes after the defrost cycle. These alarms are also disabled for 20 minutes after startup. Alarm Differential establishes the difference ( F or C) between the alarm activation temperature and the alarm deactivation temperature. Alarm Time Delay establishes the time delay (minutes) between reaching a high or low temperature alarm condition and displaying an alarm message on the display. This function reduces alarm oscillation and nuisance alarms caused by temperatures that temporarily exceed alarm setpoint temperatures. Defrost Cycle Management Functions Defrost Mode allows the user to select electric heater defrost or hot gas defrost operation. During an electric heater defrost cycle, the compressor relay contacts are opened and defrost control relay contacts are closed to turn on the electric defrost heater. During a hot gas defrost cycle, the compressor relay contacts and defrost relay contacts are closed. Hot gas is delivered to the evaporator coil via a bypass solenoid valve controlled by the defrost relay. Defrost Termination Mode allows selection of time-based or temperature-based defrost termination. Time-based defrost termination is controlled by Maximum Defrost Duration. Temperature-based defrost termination is controlled by Defrost Termination Temperature. A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin 7

Defrost Termination Temperature establishes the temperature setpoint ( F or C) that ends the defrost cycle, if temperature-based defrost termination is selected. Defrost Interval establishes the time (hours) between defrost cycles. When the Defrost Interval is one hour, the Maximum Defrost Duration cannot be set at more than 40 minutes. Maximum Defrost Duration establishes the maximum time (minutes) of the defrost cycle, if time-based defrost termination is selected. A setting of 0 disables the defrost cycle. Dripping Time establishes the delay time (minutes) that water is allowed to drain away from the evaporator coil after defrost termination and before the compressor is started up for the next freeze cycle. First Defrost Delay establishes the time delay (hours) until the first defrost cycle after starting or restarting the refrigeration system. This setting can allow the system to reach operating temperature before the defrost cycle is initiated. Setting First Defrost Delay to OFF causes the first defrost after power on to occur after the Defrost Interval has elapsed. Display During Defrost defines the temperature displayed during the defrost cycle. The user may select either Setpoint or the temperature sensed just prior to starting the defrost cycle. Display Delay After Defrost establishes the time delay (minutes) after defrost termination, before the control displays the sensed temperature. Evaporator Fan Management Functions Fan Operating Mode allows selection of when the evaporator fan operates continuously or only when the compressor is running. The fan is always Off during the defrost cycle. Fan Start-Up Delay establishes the maximum time delay (minutes) after defrost termination, before the fan relay contacts close and restart the evaporator fan, even if Fan Start Temperature has not been reached. Fan Start Temperature establishes the temperature setpoint ( F or C) at which the fan relay contacts close and restart the evaporator fan after defrost termination. Binary Input Functions Binary Input Mode allows selection of how the Normally Closed binary input activates the relay contacts. See Table 3. Table 3: System Response to Binary Input Signal System Component Binary Input Function Option Selected 0 1 2 3 Compressor -- OFF ON ON Defrost -- OFF No Change No Change Evaporator Fan -- OFF ON OFF Binary Input Time Delay establishes the time delay (minutes) between the binary input signal reaching the control and activation of the response selected by Binary Input Mode. Running the Self-Test Procedure IMPORTANT: Disconnect controlled loads before running the self-test procedure. Reconnect controlled loads and cycle power to resume normal operation. The self-test procedure checks the status of the LEDs and the relays. Use the following steps to manually initiate a self-test: 1. In sequence, press and hold Up and then Down. 2. Hold for five seconds. 3. The control cycles all outputs and then tests all LEDs. Initiating a Manual Deep Freeze Cycle The Deep Freeze Cycle function is useful when loading a cold room or a display cabinet. Use the following steps to manually initiate a deep freeze cycle: 1. In sequence, press and hold Enter and Up. 2. Hold both buttons for five seconds. 3. The compressor status LED lights and the compressor output relay contacts close. Initiating a Manual Defrost Cycle Press and hold Defrost for three seconds to interrupt normal control operation and begin a manual defrost cycle. 8 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin

Table 4: Function Settings in Order of Programming in Control Module Function Display Code Useable Setting Range and Unit Value Setpoint (None) -40 to 99 F (-40 to 80 C) Differential Low Setpoint Stop High Setpoint Stop Cycle Delay Deep Freezing Time High Temperature Alarm Low Temperature Alarm Alarm Differential Alarm Time Delay Defrost Mode Defrost Termination Mode Defrost Termination Temperature Defrost Interval Maximum Defrost Duration Dripping Time First Defrost Delay Display During Defrost Display Delay After Defrost Binary Input Mode Binary Input Time Delay Fan Operating Mode Fan Startup Delay Fan Start Temperature Sensor Failure Operation Temperature Sensor Offset Temperature Units Used Display Refresh Rate HY 1 to 9F (1 to 9C ) 5 (F ) LL -40 F (-40 C) to High Setpoint Stop -25 ( F) HL Low Setpoint Stop to 99 F (80 C) 40 ( F) Factory-Set Values CC 0 to 9 minutes 1 (minutes) Co 0 to 99 minutes 60 (minutes) AH 0 to 50F (0 to 50C ) 10 (F ) AL -50 to 0F (-50 to 0C ) -10 (F ) Ad 1 to 9F (1 to 9C ) 5 (F ) At 0 to 99 minutes 3 (minutes) df de 0 = electric defrost 1 = hot gas defrost 0 = time-based 1 = temperature-based dt 32 to 68 F (0 to 20 C) 55 ( F) 0 (electric defrost) di 1 to 99 hours 7 (hours) 1 (temperature-based) dd 0 to 99 minutes 45 (minutes) dc 0 to 99 minutes 5 (minutes) du OF, 0 to 99 minutes OF (Off) dp 0 = last main sensor reading 1 = main setpoint dr 1 to 99 minutes 20 (minutes) if 0 = no response 1 = compressor off, alarm on 2 = alarm on 3 = evaporator fan off, alarm on 0 (last main sensor reading) 0 (no response) id 0 to 99 minutes 0 (minutes) FF 0 = parallel with compressor 1 = always on Fd 0 to 99 minutes 5 (minutes) Fr -22 to 41 F (-30 to 5 C) 40 ( F) SF 0 = compressor on 1 = compressor off 2 = based on last four cycles So -20 to 20F (-20 to 20C ) 0 (F ) Un 0 = C 1 = F 0 (parallel with compressor) 2 (based on last four cycles) 1 ( F) PU 1 to 99 seconds 1 (second) A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin 9

Alarm and Fault Display Codes These alarm and fault codes will flash on the LED display when the control detects the following faults: Table 5: Display Codes and Status Display Code F1 Indicates an open or shorted main temperature sensor. F2 Indicates an open or shorted evaporator temperature sensor. A1 Binary input is open for longer than the Binary Input Time Delay, and Binary Input Mode Option 1 is selected. A2 Binary input is open for longer than Binary Input Time Delay, and Binary Input Mode Option 2 is selected. A3 Binary input is open for longer than the Binary Input Time Delay, and Binary Input Mode Option 3 is selected. HI Main sensor temperature has reached or exceeded the High Temperature Alarm value. LO Main sensor temperature has reached or fallen below the Low Temperature Alarm value. EE Program Failure System Status Alarm LED is on. Compressor runs according to the Sensor Failure Mode selected. Correct problem with sensor and cycle power to reset control. Alarm LED is on. Defrost cycle is controlled by Defrost Interval and Defrost Duration. Correct problem with sensor to reset control. Alarm LED is on. Compressor, Defrost, and Evaporator Fan are OFF. Alarm LED is on. Compressor and Evaporator Fan are ON. Defrost may be ON or OFF. Alarm LED is on. Compressor is ON. Evaporator Fan is OFF. Defrost may be ON or OFF. Alarm LED is on. Correct problem to reset control. Alarm LED is on. Correct problem to reset control. Alarm LED is on. Outputs are off. Replace control. Ordering Information Table 6: Order Information Product Code Number Description Shipping Weight MR3CCUHV-12C Temperature/Defrost Control with Relay Board 1.39 lb (630 g) A99BB-200C Sensor, cable length: 6-1/2 ft (2 m) 0.13 lb (60 g) 10 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin

Relay Electrical Ratings Relay ratings in Tables 7-9 are for ambient temperatures in the range -40 to 111 F (-40 to 44 C). De-rate electrical ratings 6.25% per 1C between 44 to 60 C. De-rate electrical ratings 3.45% per 1F between 111 to 140 F. Table 7: SPST Compressor Relay Electrical Ratings Motor Ratings 24 VAC 120 VAC 208 VAC 240 VAC Horsepower -- 1 1.5 2 Full Load Amperes -- 16 11 12 Locked Rotor Amperes -- 96 66 72 Pilot Duty (VA) 125 750 875 1125 Table 8: SPDT Fan Relay Electrical Ratings Motor Ratings 24 VAC 120 VAC 208 VAC 240 VAC Horsepower -- 1/3 1/2 3/4 Full Load Amperes -- 7.2 5.65 6.9 Locked Rotor Amperes -- 43.2 33.9 41.4 Pilot Duty (VA) 50 325 450 600 Table 9: SPST Defrost Heater Relay Electrical Ratings Motor Ratings 24 VAC 120 VAC 208 VAC 240 VAC Horsepower -- 1 1.5 2 Full Load Amperes -- 16 11 12 Locked Rotor Amperes -- 96 66 72 Non-Inductive Load Amperes -- 20 20 20 Pilot Duty (VA) 125 750 825 1125 Repair and Replacement Do not attempt field repair of the control. In case of a defective or improperly functioning control, please check with your nearest Johnson Controls/PENN representative. When contacting the supplier for replacement, state the model number of the control. You can find this number on the data plate. A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin 11

S pecifications Product Electrical Ratings See Tables 7-9. Electrical Frequency Power Consumption Accuracy A99B Sensor Cable Ambient Operating Conditions Ambient Storage Conditions Dimensions (H x W x D) Agency Listings MR3CCUHV Temperature/Defrost Control with Relay Board 50/60 Hz 5VA @240 VAC, 5VA @120 VAC ± 1.8F (±1C ) 6-1/2 ft (2m) Shipping Weight 1.39 lb (630 g) +14 to +111 F (-10 to +44 C); See Relay Electrical Ratings in this document for de-rating information. 0 to 95% RH (non-condensing) -22 to +176 F (-30 to +80 C) 0 to 95% RH (non-condensing) 7.94 x 3.6 x 2.4 in. (202 x 92 x 61 mm) UL Recognized File SA516, CCN SDFY2 (U.S.A.), SDFY8 (Canada) The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult Johnson Controls/Penn Application Engineering at 1 (800) 275-5676. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. Controls Group www.johnsoncontrols.com 507 E. Michigan Street FAN 125 P.O. Box 423 Master Catalog Milwaukee, WI 53201 Printed in U.S.A. 12 A MR3CCUHV Temperature/Defrost Control Product/Technical Bulletin