MS4PMUHVT Multi-Stage Electronic Temperature Control with ...

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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 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. Application IMPORTANT: The MS4PMUHVT Multi-Stage Temperature Control is intended to control equipment under normal operating conditions. Where failure or malfunction of the MS4PMUHVT 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 MS4PMUHVT control must be incorporated into and maintained as part of the control system. The MS4PMUHVT control provides direct control in many applications: • cooling tower pump and/or fan control • rooftop heating or cooling units • boiler or pump control • space temperature control • compressor or chiller staging The MS4PMUHVT control has four heavy-duty relays. See electrical ratings in Table 6 for more information. Operation Mode Selection Mode Selection allows selection of one of several modes: • Direct mode for cooling applications • Reverse mode for heating applications • Deadband mode for applications requiring cooling and heating with a common setpoint and a deadband • Independent Setpoint mode for applications requiring cooling and heating with one setpoint for heating and a second (independent) setpoint for cooling Stage Control Several settings define the control functions for the stages: • Setpoints and Differentials setting establish the temperature-control ranges. • Cycle Delays establish a set time interval between heating or cooling cycle restarts to avoid excessive cycling. • Soft Start controls the rate at which temperature approaches the Setpoint on power-up or when Binary Input Option 3 is selected. This feature is useful when starting equipment where merchandise in the controlled space needs to be slowly brought to the desired temperature (Setpoint). If this feature is used, the control activates up to four stages in succession to slowly bring the sensed temperature to the desired temperature (Setpoint) at the user-selected rate. Alarm Management Several settings define the control functions for alarms: • 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. • Alarm Codes assist in troubleshooting. 2 MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin
Binary Input Response Binary Input Function allows the user to select how the control responds to a binary input (switch) if the binary input contacts are open for a time (minutes) longer than the Binary Input Time Delay. Additional Features The MS4PMUHVT control uses several other settings to control specific 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. See Initiating a Manual Self-Test. • Dual Sensor Temperature Reset resets the setpoint based on the difference between the Auxiliary Temperature Sensor (ATS) and the Setpoint to provide energy savings. See Temperature Reset. For additional information about control functions and how to program them, see Programming the Control and Control Functions. Control Module Front Panel The control module has an LED display and buttons for entering programming information and activating various features. The display has three LED digits and a minus indicator. 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 relay status LEDs. • LED 1 indicates that the Stage 1 Relay is energized. • LED 2 indicates that the Stage 2 Relay is energized. • LED 3 indicates that the Stage 3 Relay is energized. Relay Status LEDs Up Button Installation See Mounting and Wiring for installation information. Dimensions 3-5/8 (92) 2-3/8 (61) 7-15/16 (202) 1-3/4 (44) 3 (76) 1-5/8 (42) 6 (152) Figure 3: Relay Pack with Mounting Bracket Dimensions, in. (mm) 2-3/4 (70) 3 (75) 2-5/16 (58) 1-3/8 (35) 2-11/16 (68) 1-1/8 (28) Figure 4: Control Module Dimensions, in. (mm) 1/4 (6) 2 (50) 78-3/4 (2000) Figure 5: A99BB-200C Sensor Dimensions, in. (mm) Enter Button Down Button Figure 2: Control Module Front Panel and Display MS4PMUHVT Multi-Stage Electronic Temperature Control with Relay Pack Product/Technical Bulletin 3
Page 1: Product/Technical MS4PMUHVT Issue D
Page 5 and 6: Wiring ! WARNING: Risk of Electric
Page 7 and 8: Modes of Operation The MS4PMUHVT co
Page 9 and 10: Independent Setpoint Mode Independe
Page 11 and 12: Control Functions Temperature Manag
Page 13 and 14: Temperature Reset The control modul
Page 15 and 16: Alarm and Fault Display Codes These

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