Johnson Controls CSV060B-240B Microprocessor Controller, Operation, Continuous Blower

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FORM 145.15-IOM7 (412)

MICROPROCESSOR CONTROLLER

The microprocessor control system is specifically designed for single and dual stage systems. The control system interfaces with a conventional type thermostat.

•Unit shall be complete with self-contained low- voltage control circuit

•Unit shall incorporate a lockout circuit which provides reset capability at the space thermostat or base unit, should any of the following standard safety devices trip and shut off compressor.

-Loss-of-charge/Low-pressure switch

-High-pressure switch

-Condensate Overflow protection switch

•Unit shall operate with conventional thermostat designs and have a low voltage terminal strip for easy hook-up.

•Unit control board shall have on-board diagnostics and fault code display.

•Standard controls shall include anti-short cycle and low voltage protection

•Control board shall monitor each compressor and refrigerant safety switch independently.

•Control board shall have random start feature

•Control board shall retain last 5 fault codes in non volatile memory which will not be lost in the event of a power loss.

OPERATION

For cooling the room t-stat energizes the low-voltage circuit between “R” & “Y1”.

The call is passed to the unit microprocessor control, which then determines whether the requested operation is available and, if so, which components to energize.

CONTINUOUS BLOWER

By setting the room t-stat fan switch set to “ON”, the supply air blower will operate continuously. With the room t-stat fan switch set to “AUTO”, the blower is energized whenever a cooling operation is requested. The blower is energized after any specified delay associated with the operation.

When energized, the indoor blower has a minimum run time of 30 seconds. Additionally, the indoor blower has a delay of 10 seconds between operations.

When the room t-stat calls for cooling, the low-voltage control circuit from “R” to “Y1”and “G” is completed. The compressor and fan motor are energized. After completing the specified fan on delay for cooling, the microprocessor control will energize the blower motor.

Once the room t-stat has been satisfied, it will de- energize “Y1”. If the compressor has satisfied its minimum run time, the compressor and fan de- energize. Otherwise, the unit operates the cooling system until the minimum run time for the compressor has been completed. After the compressor de- energizes, the blower is stopped following the elapse of the fan-off delay for cooling.

To be available, a compressor must not be locked-out due to a high-pressure switch; low- pressure switch; condensate overflow switch; and the anti-short cycle delay (ASCD) must have elapsed.

SAFETY SWITCHES

Each refrigerant system is monitored to ensure it does not operate outside of its intended operating parameters. Safety switches are handled as described below. All system errors override minimum run times for compressors.

High-Pressure Limit Switch

If a high-pressure limit switch opens, the microprocessor control de-energizes the compressor, initiates the ASCD, and stops the fan. If a call for cooling or heating is still present at the conclusion of the ASCD, the microprocessor control will re-energize the compressor and unit fan.

Should a high-pressure switch open three times within two hours of operation, the microprocessor control will permanently lock-out the compressor. The system must be manually reset by de-energizing the 24 volt power to unit, or turning the room t-stat to the “OFF” position then back to cooling position. The microprocessor control will flash a fault code indicating a high-pressure lock-out.

Low-Pressure Limit Switch

The low-pressure limit switch is not monitored during the initial 30 seconds of compressor operation. After the initial 30 seconds have passed, the microprocessor control will monitor the low-pressure switch for another 30 seconds. If the low-pressure switch fails to close after the 30 second monitoring phase, the microprocessor control will de-energize the compressor, initiate the ASCD, and stop the fan.

Once the low-pressure switch has been proven (closed during the 30-second monitoring period as

JOHNSON CONTROLS

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Contents Model CSV Vertical R-410A Read Before Proceeding Changeability of this Document General Information CSV Operating Weight Unit Shipping Weight LbsWater Piping Unit MountingCSV060 Dimensional Data CSV096-120 Dimensional Data CSV180 Dimensional Data CSV240 Dimensional Data Evaporator Blower Discharge Conversion DuctworkElectrical Wiring Typical Wiring Schematic Johnson Controls Johnson Controls Johnson Controls Electrical Data Oversized Evaporator Motor Electrical Data Electrical Data Standard Evaporator MotorModel # CSV120B FAN Performance CSV060BCSV096B CSV240B CSV180BEVAPORATOR-STANDARD Blower Motor and Drive Data Motor and Pulley DataBlower Speed Adjustment Pressure Drop FT H20 Unit Flow Rate GPM Water Pressure Drop DataDrop Unit Flow Rate GPMUnit START-UP and OperationContinuous Blower Safety SwitchesMicroprocessor Controller OperationSafety Controls Condensate Overflow SwitchFlash Codes Drive Belt Evaporator CoilRefrigerant Circuits Blower410A Quick Reference Guide Form 145.15-IOM7

CSV060B-240B specifications

The Johnson Controls CSV060B-240B is a cutting-edge packaged rooftop air conditioning unit designed for commercial applications, renowned for its energy efficiency, reliability, and advanced technological features. This model exemplifies the balance between performance and sustainability, making it a prime choice for businesses seeking effective climate control solutions.

One notable feature of the CSV060B-240B is its variable speed compressor technology. This innovative design allows the unit to adjust its cooling output in response to real-time demand, which significantly enhances energy efficiency. By operating at lower speeds during moderate cooling loads, the system consumes less energy while maintaining consistent indoor comfort. This not only reduces operational costs but also minimizes the environmental impact associated with energy consumption.

In addition to its variable speed compressor, the CSV060B-240B is equipped with advanced intelligent controls. These controls enable users to integrate the unit into building management systems, allowing for seamless monitoring and adjustments. Features such as remote connectivity and smartphone integration provide added convenience, allowing facility managers to optimize system performance from anywhere.

Another key characteristic of the CSV060B-240B is its robust construction designed for durability and easy maintenance. The unit comes with a weatherproof cabinet, which protects internal components from harsh environmental conditions. This design extends the lifespan of the unit and reduces downtime due to maintenance or repairs. Additionally, the access panels are strategically placed to facilitate easy servicing, making it user-friendly for maintenance personnel.

The CSV060B-240B also emphasizes quiet operation, making it ideal for environments where noise levels need to be kept in check, such as hospitals, schools, and offices. Enhanced sound insulation and the use of a quiet fan design contribute to a more pleasant indoor atmosphere.

Overall, the Johnson Controls CSV060B-240B stands out in the market due to its combination of energy efficiency, smart technology, durability, and quiet operation. It is an excellent investment for businesses aiming to enhance their HVAC systems while adhering to sustainability practices and ensuring the comfort of their occupants. The CSV060B-240B not only meets the demands of modern commercial spaces but also sets a new standard for HVAC performance and innovation.
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