Carrier PCV015-060 specifications Auxiliary Modulating Hot Water/Steam Heating Reheat

Page 35

•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 of capacity. Likewise, a 45-second delay is used when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the supply-air temperature has increased above the minimum supply-air temperature limit.

The WSHP Open controller provides a status input to moni- tor the compressor operation. The status is monitored to deter- mine if the compressor status matches the commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this should occur, an alarm will be generated to indicate the faulted compressor condition.

HEATING — The WSHP Open controller will operate one or two stages of compression to maintain the desired heating set point. The compressor outputs are controlled by the heating PI (proportional-integral) loop and heating 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 heating set point. The follow- ing conditions must be true in order for the heating algorithm to run:

•Heating is set to Enable.

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

•Condensate overflow input is normal.

•If occupied, the SPT is less than the occupied heating set point.

•Space temperature reading is valid.

•If unoccupied, the SPT is less than the unoccupied heat- ing set point.

•OAT (if available) is less than the heating lockout temperature.

If all the above conditions are met, the heating outputs will be energized as required, otherwise they will be deenergized. If the heating is active and should the SAT approach the maxi- mum SAT limit, the fan will be indexed to the next higher

speed. Should this be insufficient, and the SAT rises further reaching the maximum heating SAT limit, the fan will be indexed to the maximum speed. If the SAT still continues to rise 5° F above the maximum limit, all heating stages will be disabled.

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

The configuration screens contain the maximum SAT parameter as well as heating 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 of capacity. Likewise, a 45-second delay is used when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the sup- ply-air temperature has fallen below the maximum supply air temperature limit.

The WSHP Open controller provides a status input to moni- tor the compressor operation. The status is monitored to deter- mine if the compressor status matches the commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this should occur, an alarm will be generated to indicate the faulted compressor condition. Also, if auxiliary heat is available (see below), the auxiliary heat will operate to replace the reverse cycle heating and maintain the space temperature as required.

AUXILIARY HEAT — The WSHP Open controller can con- trol a two-position, modulating water, or steam valve connect- ed to a coil on the discharge side of the unit and supplied by a boiler or a single-stage ducted electric heater in order to main- tain the desired heating set point. Should the compressor capac- ity be insufficient or a compressor failure occurs, the auxiliary heat will be used. Unless the compressor fails, the auxiliary heat will only operate to supplement the heat provided by the compressor if the space temperature falls more than one degree below the desired heating set point (the amount is config- urable). The heat will be controlled so the SAT will not exceed the maximum heating SAT limit.

Auxiliary Modulating Hot Water/Steam Heating Reheat

—The control can modulate a hot water or steam valve con- nected to a coil on the discharge side of the unit and supplied by a boiler in order to maintain the desired heating set point should the compressor capacity be insufficient or a compressor failure occurs. Unless a compressor fault condition exists, the valve will only operate to supplement heat provided by com- pressor if the space temperature falls more than one degree be- low the desired heating set point. The valve will be controlled so the SAT will not exceed maximum heating SAT limit.

Two-Position Hot Water/Steam Heating Reheat — The con- trol can operate a two-position, NO or NC, hot water or steam valve connected to a coil on the discharge side of the unit and supplied by a boiler in order to maintain the desired heating set point should the compressor capacity be insufficient or a com- pressor failure occurs. Unless a compressor fault condition ex- ists, the valve will only open to supplement the heat provided by the compressor if the space temperature falls more than one degree below the desired heating set point. The valve will be controlled so the SAT will not exceed the maximum heating SAT limit. The heat stage will also be subject to a 2-minute minimum OFF time to prevent excessive valve cycling.

Single Stage Electric Auxiliary Heat — The control can op- erate a field-installed single stage of electric heat installed on the discharge side of the unit in order to maintain the desired

35

Page 34 Page 36
Image 35
Page 34 Page 36
Contents Safety Considerations ContentsGeneral Installation209 224 50PCH,PCV Unit Physical Data203 218 IPT 8412Connections 50PCH Opening UnitTypical Installation 50PCH Units A50-8413 Typical Vertical Installation 50PCV Units A50-8489 Install Condensate DrainMount the Unit Slope to drain A50-6261tfMetal Hose Minimum Bend Radii Fitting Wire Field Power SupplyNEC LOCBMC MvesTXV RVSClippable Field Selection Jumper High-Pressure Water SwitchPower Block HpwsLON Loss of Charge Pressure Switch Condensate PanMotorized Valve End Switch Temperature Switch A50-8493A50-8440 National Electrical Code Temperature SwitchA50-8355 8354 A508356 LWT Wshp Open Control FLA Hacr 50PCH,PCV Unit Electrical DataA50-8162 MCAA50-8442 Wire Field ControlsA50-8441 SPT Sensors Rnet Wiring SpecificationsRnet Wiring Field-Supplied Sensors for Wshp Open ControllerBlower Speed Selection PRE-START-UP50PCH,PCV Blower Performance High-Static Unit 50PCV Blower Performance with Hot Water Reheat HWR Option50PCV Blower Performance with Wet Coil 50PCH,PCV Blower Performance Standard UnitField Selectable Inputs Complete C Control Jumper Settings Refer toDeluxe D Control Jumper Settings Refer to , 15, Operating Limits DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options START-UPOperating Limits 50PCH,PCV Units Unit Start-Up Cooling ModeWater Temperature Change Through Heat Exchanger 50PC036 Typical Unit Operating Pressures and Temperatures 50PC024 Typical Unit Operating Pressures and Temperatures50PC030 Typical Unit Operating Pressures and Temperatures Temp GPM/ton Pressure Heat 50PC042 Typical Unit Operating Pressures and Temperatures50PC048 Typical Unit Operating Pressures and Temperatures 50PC060 Typical Unit Operating Pressures and TemperaturesUnit Start-Up with Wshp Open Controls Unit Start-Up Heating ModeSize Coaxial Water Pressure Drop50PC Pressure DROP, psi kPa Gpm 30 F 50 F 70 F 90 FUnits with Aquazone Complete C Control Approximate Fluid Volume gal Per 100 Ft of PipeAntifreeze Percentages by Volume OperationUnits with Wshp Open Multiple Protocol Auxiliary Modulating Hot Water/Steam Heating Reheat Page Aquazone Deluxe D Control LED Indica Complete C Control LED Code Fault DescriptionsComplete C and Deluxe D Board System Test ESD ServiceDescription Status LED Test LED ’ to 4’ Refrigerant ChargingAir Coil Fan Motor Removal A50-8163 TroubleshootingReplacing the Wshp Open Controller’s Bat Reduced or no airflow in heat TroubleshootingAir temperature out of range Cooling mode FP1125 F orReduced airflow in cooling Reduced or no water flowSensor Appendix a Wshp Open Screen ConfigurationAlarm Status StatusConfiguration Appendix a Wshp Open Screen ConfigurationMaintenance System SettingsSchedule Test Appendix a Wshp Screen Open ConfigurationService Screen Name Configuration ServicePoint Name Password Editable Range Default Level Alarm Page Copyright 2009 Carrier Corporation II. START-UP 50PCH,PCV START-UP ChecklistA50-8446 Heating Cycle AnalysisCooling Cycle Analysis A50-8445

PCV015-060 specifications

The Carrier PCV015-060 is a cutting-edge packaged cooling and heating unit designed for commercial applications that demand high efficiency, reliability, and adaptability. This model is particularly renowned for its robust performance, making it an ideal choice for businesses seeking optimal indoor climate control.

One of the standout features of the PCV015-060 is its impressive energy efficiency. Equipped with advanced scroll compressors, this unit operates with a higher energy efficiency ratio (EER), translating to lower operational costs and reduced environmental impact. The incorporation of eco-friendly refrigerants further bolsters its sustainability credentials, ensuring compliance with modern environmental regulations.

The PCV015-060 showcases superior airflow design, which minimizes noise levels while maximizing thermal comfort. Its high-efficiency evaporator and condenser coils facilitate enhanced heat transfer, ensuring effective cooling and heating performance even in extreme weather conditions. This model is also designed with multiple fan speed options, allowing users to customize air distribution according to specific requirements.

Built with user-friendly controls, the Carrier PCV015-060 supports advanced digital thermostat interfaces, enabling precise temperature management. Optional integration with building management systems allows for remote monitoring and control, enhancing operational efficiency and simplifying maintenance tasks.

Durability is another hallmark of the PCV015-060. The unit is constructed using high-quality materials designed to withstand varying environmental conditions, which enhances the lifespan of the system. Additionally, its modular design simplifies installation and service access, reducing downtime for businesses.

The versatility of the PCV015-060 is underscored by its capability to function effectively in numerous configurations, including rooftop installations and ground-mounted setups. It can efficiently handle diverse applications, from offices to retail spaces, making it an adaptable choice for many commercial needs.

In summary, the Carrier PCV015-060 offers a blend of energy efficiency, advanced technology, and durable construction, making it a formidable solution for businesses seeking reliable climate control. Its commitment to sustainability, user-friendly features, and versatile configurations solidify its standing as a premier choice for commercial heating and cooling needs. With the PCV015-060, businesses can ensure a comfortable environment for both employees and customers while maintaining operational efficiency.
Top Page Image Contents