Carrier 50PCH specifications

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optional CO2 IAQ (indoor air quality) sensor mounted in the space can maximize the occupant comfort. The WSHP Open controller has its own hardware clock that is automatically set when the heat pump software is downloaded to the board. Oc- cupancy types are described in the scheduling section below. The following sections describe the functionality of the WSHP Open multi-protocol controller. All point objects referred to in this sequence of operation will be referenced to the objects as viewed in the BACview6 handheld user interface.

SCHEDULING — Scheduling is used to start/stop the unit based on a time period to control the space temperature to spec- ified occupied heating and cooling set points. The controller is defaulted to control by occupied set points all the time, until ei- ther a time schedule is configured with BACview6, Field Assis- tant, i-Vu®Open, or a third party control system to enable/dis- able the BAS (Building Automation System) on/off point. The local time and date must be set for these functions to operate properly. The occupancy source can be changed to one of the following:

Occupancy Schedules — The controller will be occupied 24/7 until a time schedule has been configured using either Field Assistant, i-Vu Open, BACview6 or a third party control system to enable/disable the BAS on/off point. The BAS point can be disabled by going to Config, then Unit, then Occupancy Sched- ules and changing the point from enable to disable then click- ing OK.

NOTE: This point must be enabled in order for the i-Vu Open, Field Assistant, or BACview6 control system to assign a time schedule to the controller.

Schedule_schedule — The unit will operate according to the schedule configured and stored in the unit. The schedule is accessible via the BACview6 Handheld tool, i-Vu Open, or Field Assistant control system. The daily schedule consists of a start/stop time (standard or 24-hour mode) and seven days of the week, starting with Monday and ending on Sunday. To enter a daily schedule, navigate to Config, then Sched, then enter BACview6 Admin Password (1111), then go to schedule_schedule. From here, enter either a Weekly or Excep- tion schedule for the unit.

Occupancy Input Contact — The WSHP Open controller has the capability to use an external dry contact closure to deter- mine the occupancy status of the unit. The Occupancy Sched- ules will need to be disabled in order to utilize the occupancy contact input.

NOTE: Scheduling can only be controlled from one source. BAS (Building Automation System) On/Off — A BAS system that supports network scheduling can control the unit through a network communication and the BAS scheduling function once the Occupancy Schedules have been disabled.

NOTE: Scheduling can either be controlled via the unit or the BAS, but not both.

INDOOR FAN — The indoor fan will operate in any one of three modes depending on the user configuration selected.

Fan mode can be selected as Auto, Continuous, or Always On. In Auto mode, the fan is in intermittent operation during both occupied and unoccupied periods. Continuous fan mode is intermittent during unoccupied periods and continuous dur- ing occupied periods. Always On mode operates the fan con- tinuously during both occupied and unoccupied periods. In the default mode, Continuous, the fan will be turned on whenever any one of the following is true:

•The unit is in occupied mode as determined by its occu- pancy status.

•There is a demand for cooling or heating in the unoccu- pied mode.

•There is a call for dehumidification (optional).

When power is reapplied after a power outage, there will be a configured time delay of 5 to 600 seconds before starting the

fan. There are also configured fan delays for Fan On and Fan Off. The Fan On delay defines the delay time (0 to 30 seconds; default 10) before the fan begins to operate after heating or cooling is started while the Fan Off delay defines the delay time (0 to 180 seconds; default 45) the fan will continue to op- erate after heating or cooling is stopped. The fan will continue to run as long as the compressors, heating stages, or the dehu- midification relays are on. If the SPT failure alarm or conden- sate overflow alarm is active; the fan will be shut down imme- diately regardless of occupancy state or demand.

Fan Speed Control (During Heating) — Whenever heat is re- quired and active, the control continuously monitors the sup- ply-air temperature to verify it does not rise above the config- ured maximum heating SAT limit (110 F default). As the SAT approaches this value, the control will increase the fan speed as required to ensure the SAT will remain within the limit. This feature provides the most quiet and efficient operation by oper- ating the fan at the lowest speed possible.

Fan Speed Control (During Cooling) — Whenever mechani- cal cooling is required and active, the control continuously monitors the supply-air temperature to verify it does not fall be- low the configured minimum cooling SAT limit (50 F default). As the SAT approaches this value, the control will increase the fan speed as required to ensure the SAT will remain within the limit. The fan will operate at lowest speed to maximize latent capacity during cooling.

COOLING — The WSHP Open controller will operate one or two stages of compression to maintain the desired cooling set point. The compressor outputs are controlled by the PI (propor- tional-integral) cooling loop and cooling stages capacity algo- rithm. They will be used to calculate the desired number of stages needed to satisfy the space by comparing the space tem- perature (SPT) to the appropriate cooling set point. The water side economizer, if applicable, will be used for first stage cool- ing in addition to the compressor(s). The following conditions must be true in order for the cooling algorithm to run:

•Cooling is set to Enable.

•Heating mode is not active and the compressor time guard has expired.

•Condensate overflow input is normal.

•If occupied, the SPT is greater than the occupied cooling set point.

•Space temperature reading is valid.

•If unoccupied, the SPT is greater than the unoccupied cooling set point.

•If economizer cooling is available and active and the economizer alone is insufficient to provide enough cooling.

•OAT (if available) is greater than the cooling lockout temperature.

If all the above conditions are met, the compressors will be energized as required, otherwise they will be deenergized. If cooling is active and should the SAT approach the minimum SAT limit, the fan will be indexed to the next higher speed. Should this be insufficient and if the SAT falls further (equal to the minimum SAT limit), the fan will be indexed to the maxi- mum speed. If the SAT continues to fall 5° F below the mini- mum SAT limit, all cooling stages will be disabled.

During Cooling mode, the reversing valve output will be held in the cooling position (either B or O type as configured) even after the compressor is stopped. The valve will not switch position until the Heating mode is required.

The configuration screens contain the minimum SAT parameter as well as cooling lockout based on outdoor-air temperature (OAT) Both can be adjusted to meet various specifications.

There is a 5-minute off time for the compressor as well as a 5-minute time delay when staging up to allow the SAT to achieve a stable temperature before energizing a second stage

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Contents Contents Safety ConsiderationsInstallation GeneralPhysical Data 50PCH,PCV Units Size A50-8695IPT A50-7842ef Electric HeatA50-8696 Side Discharge Back DischargeA50-8489 Install Condensate DrainMount the Unit A50-6260efMetal Hose Minimum Bend Radii A50-6261tfA50-6262ef Copper FPT/PVCWire Field Power Supply FittingA50-8490 RVS Sensor, Low Temperature Protection Air CoilA50-8491 Reversing Valve SolenoidA50-8492 HpwsA50-8493 LONNational Electrical Code Optional Wiring Temperature Switch A50-8440A50 86978698 Units with Deluxe D and Wshp Open Multiple Protocol ControlsWshp Open Control 50PCH,PCV Unit Electrical Data A50-8162A50-8441 Wire Field ControlsA50-8442 Field-Supplied Sensors for Wshp Open Controller Rnet Wiring SpecificationsRnet Wiring SPT SensorsPRE-START-UP FAN Rated MIN 50PCH,PCV Blower Performance Standard Unit50PCH,PCV Blower Performance High-Static Unit PCV Speed Airflow CFMDeluxe D Control Jumper Settings Refer to , 15, Complete C Control Jumper Settings Refer toField Selectable Inputs START-UP DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options Operating LimitsOperating Limits 50PCH,PCV Units Unit Start-Up Cooling ModeWater Temperature Change Through Heat Exchanger Cooling Heating Water Flow Rate GPM50PC012 Typical Unit Operating Pressures and Temperatures 50PC006 Typical Unit Operating Pressures and Temperatures50PC009 Typical Unit Operating Pressures and Temperatures Entering Cooling Heating Water50PC024 Typical Unit Operating Pressures and Temperatures 50PC015 Typical Unit Operating Pressures and Temperatures50PC018 Typical Unit Operating Pressures and Temperatures Temp GPM/ton Pressure Heat50PC042 Typical Unit Operating Pressures and Temperatures 50PC030 Typical Unit Operating Pressures and Temperatures50PC036 Typical Unit Operating Pressures and Temperatures Water Air Temp50PC060 Typical Unit Operating Pressures and Temperatures Unit Start-Up Heating Mode50PC048 Typical Unit Operating Pressures and Temperatures Unit Start-Up with Wshp Open ControlsA50-8444 BACview6 Display InterfacePressure DROP, psi kPa Coaxial Water Pressure DropGpm 30 F 50 F 70 F 90 F 10 C 21 C 32 C 006 009 Units with Aquazone Deluxe D Control OperationUnits with Aquazone Complete C Control Units with Wshp Open Multiple ProtocolPage Auxiliary Modulating Hot Water/Steam Heating Reheat Complete C and Deluxe D Board System Test LED Fault Description Code Complete C Control LED Code Fault DescriptionsLED Status Description of Operation Alarm Relay Aquazone Deluxe D Control LED IndicaDescription Status LED Test LED ServiceESD A50-6286ef Refrigerant Charging’ to 4’ Air Coil Fan Motor Removal TroubleshootingA50-8163 Cooling mode FP1125 F or TroubleshootingAir temperature out of range Reduced or no airflow in heatReduced or no water flow Reduced airflow in coolingStatus Appendix a Wshp Open Screen ConfigurationAlarm Status SensorSystem Settings Appendix a Wshp Open Screen ConfigurationMaintenance ConfigurationSchedule Service Appendix a Wshp Screen Open ConfigurationTest Point Name Password Editable Range Default Level Configuration ServiceScreen Name Alarm Page Copyright 2011 Carrier Corporation 50PCH,PCV START-UP Checklist II. START-UPA50-8445 Heating Cycle AnalysisCooling Cycle Analysis A50-8446

50PCH specifications

The Carrier 50PCH is a cutting-edge series of air-cooled chillers designed to deliver exceptional cooling performance in a wide range of commercial applications. Engineered with efficiency and reliability in mind, the 50PCH stands out for its innovative technologies and robust construction, making it a preferred choice for facility managers and HVAC professionals.

One of the main features of the Carrier 50PCH is its advanced scroll compressor technology. This system consists of high-efficiency scroll compressors that optimize energy consumption while maintaining consistent cooling output. The incorporation of variable speed technology enables the chillers to adapt to fluctuating load demands, resulting in significant energy savings and reduced operational costs.

The 50PCH chillers also boast a high energy efficiency ratio (EER) and coefficient of performance (COP), ensuring compliance with stringent energy regulations and standards. They are designed with eco-friendly refrigerants, which contribute to lower greenhouse gas emissions, making them an environmentally responsible choice for modern buildings.

In addition to its energy-efficient operation, the 50PCH series is equipped with advanced controls that allow for seamless integration into building management systems. The intuitive interface facilitates monitoring and adjustment of set points, ensuring optimal comfort conditions. Furthermore, the chillers come with extensive diagnostic capabilities, enabling proactive maintenance and reducing the risk of unexpected downtime.

The robust construction of the 50PCH series enhances durability and reliability. With an all-weather aluminum cabinet, these chillers are designed to withstand harsh environmental conditions, ensuring long-term performance. The units undergo rigorous testing to meet high industry standards for quality and reliability.

Another distinguishing characteristic of the Carrier 50PCH is its whisper-quiet operation. Engineered for low sound levels, these chillers minimize noise pollution in sensitive environments, such as hospitals, schools, or residential areas.

In summary, the Carrier 50PCH series combines exceptional performance, energy efficiency, and innovative technology in a robust and reliable package. It highlights the best in modern HVAC design, making it an ideal solution for a wide array of climate control needs in commercial and institutional settings. With its advanced features and commitment to sustainability, the 50PCH is undoubtedly a leader in the air-cooled chiller market.
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