Carrier 50PCH Start-Up, Operating Limits, DIP Switch Block S2 Accessory 1 Relay Options

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Table 11 — DIP Switch Block S2 —

Accessory 1 Relay Options

ACCESSORY 1

DIP SWITCH POSITION

RELAY OPTIONS

1

2

3

Cycle with Fan

On

On

On

Digital NSB

Off

On

On

Water Valve — Slow Opening

On

Off

On

OAD

On

On

Off

LEGEND

 

 

 

NSB — Night Setback

OAD — Outside Air Damper

NOTE: All other DIP switch combinations are invalid.

Table 12 — DIP Switch Block S2 —

Accessory 2 Relay Options

ACCESSORY 2

DIP SWITCH POSITION

RELAY OPTIONS

4

5

6

Cycle with Fan

On

On

On

Digital NSB

Off

On

On

Water Valve — Slow Opening

On

Off

On

OAD

On

On

Off

LEGEND

 

 

 

NSB — Night Setback

OAD — Outside Air Damper

NOTE: All other switch combinations are invalid.

Auto Dehumidification Mode or High Fan Mode — Switch 7 provides selection of auto dehumidification fan mode or high fan mode. In auto dehumidification fan mode the fan speed relay will remain off during cooling stage 2 if terminal H is active. In high fan mode, the fan enable and fan speed relays will turn on when terminal H is active. Set the switch to ON for auto dehumidification fan mode or to OFF for high fan mode.

Switch 8 — Not used.

Deluxe D Control Accessory Relay Configura- tions — The following accessory relay settings are applica- ble for both Deluxe D controls only:

CYCLE WITH FAN — In this configuration, the relay will be ON any time the Fan Enable relay is on.

CYCLE WITH COMPRESSOR — In this configuration, the relay will be ON any time the Compressor relay is on.

DIGITAL NIGHT SET BACK (NSB) — In this configura- tion, the relay will be ON if the NSB input is connected to ground C.

NOTE: If there are no relays configured for digital NSB, then the NSB and override (OVR) inputs are automatically config- ured for mechanical operation.

MECHANICAL NIGHT SET BACK — When NSB input is connected to ground C, all thermostat inputs are ignored. A thermostat set back heating call will then be connected to the OVR input. If OVR input becomes active, then the Deluxe D control will enter Night Low Limit (NLL) staged heating mode. The NLL staged heating mode will then provide heating during the NSB period.

Water Valve (Slow Opening) — If relay is config- ured for Water Valve (slow opening), the relay will start 60 seconds prior to starting compressor relay.

Outside Air Damper (OAD) — If relay is configured for OAD, the relay will normally be ON any time the Fan Enable relay is energized. The relay will not start for 30 minutes following a return to normal mode from NSB, when NSB is no longer connected to ground C. After 30 min- utes, the relay will start if the Fan Enable is set to ON.

CAUTION

To avoid equipment damage, DO NOT leave system filled in a building without heat during the winter unless anti- freeze is added to system water. Condenser coils never fully drain by themselves and will freeze unless winterized with antifreeze.

START-UP

Use the procedure outlined below to initiate proper unit start-up.

NOTE: This equipment is designed for indoor installation only.

Operating Limits

ENVIRONMENT — This equipment is designed for indoor installation ONLY. Extreme variations in temperature, hu- midity and corrosive water or air will adversely affect the unit performance, reliability and service life.

POWER SUPPLY — A voltage variation of ± 10% of nameplate utilization voltage is acceptable.

UNIT STARTING CONDITIONS — Depending on the model, units start and operate in an ambient temperature of 45 F with entering-air temperature at 40 F or 50 F, entering- water temperature at 20 F or 50 F and with both air and water at the flow rates used.

NOTE: These operating limits are not normal or continuous operating conditions. Assume that such a start-up is for the purpose of bringing the building space up to occupancy temperature. See Table 14 for operating limits.

WARNING

When the disconnect switch is closed, high voltage is present in some areas of the electrical panel. Exercise caution when working with the energized equipment. Failure to heed this warning could lead to personal injury.

1.Restore power to system.

2.Turn thermostat fan position to ON. Blower should start.

3.Balance airflow at registers.

4.Adjust all valves to the full open position and turn on the line power to all heat pump units.

5.Operate unit in the cooling cycle first, then the heating cycle. Refer to Table 13 for unit operating limits. Al- low 15 minutes between cooling and heating tests for pressure to equalize.

NOTE: Two factors determine the operating limits of a unit: entering-air temperature and water temperature. Whenever any of these factors are at a minimum or maximum level, the other two factors must be at a normal level to ensure proper unit operation. See Table 13.

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Contents Safety Considerations ContentsGeneral InstallationPhysical Data 50PCH,PCV Units Size A50-8695IPT Electric Heat A50-7842efA50-8696 Back Discharge Side DischargeMount the Unit Install Condensate DrainA50-8489 A50-6260efA50-6262ef A50-6261tfMetal Hose Minimum Bend Radii Copper FPT/PVCFitting Wire Field Power SupplyA50-8490 A50-8491 Sensor, Low Temperature Protection Air CoilRVS Reversing Valve SolenoidHpws A50-8492LON A50-8493A50-8440 National Electrical Code Optional Wiring Temperature Switch8697 A50Units with Deluxe D and Wshp Open Multiple Protocol Controls 8698Wshp Open Control A50-8162 50PCH,PCV Unit Electrical DataA50-8441 Wire Field ControlsA50-8442 Rnet Wiring Rnet Wiring SpecificationsField-Supplied Sensors for Wshp Open Controller SPT SensorsPRE-START-UP 50PCH,PCV Blower Performance High-Static Unit 50PCH,PCV Blower Performance Standard UnitFAN Rated MIN PCV Speed Airflow CFMDeluxe D Control Jumper Settings Refer to , 15, Complete C Control Jumper Settings Refer toField Selectable Inputs DIP Switch Block S2 Accessory 2 Relay Options DIP Switch Block S2 Accessory 1 Relay OptionsSTART-UP Operating LimitsWater Temperature Change Through Heat Exchanger Unit Start-Up Cooling ModeOperating Limits 50PCH,PCV Units Cooling Heating Water Flow Rate GPM50PC009 Typical Unit Operating Pressures and Temperatures 50PC006 Typical Unit Operating Pressures and Temperatures50PC012 Typical Unit Operating Pressures and Temperatures Entering Cooling Heating Water50PC018 Typical Unit Operating Pressures and Temperatures 50PC015 Typical Unit Operating Pressures and Temperatures50PC024 Typical Unit Operating Pressures and Temperatures Temp GPM/ton Pressure Heat50PC036 Typical Unit Operating Pressures and Temperatures 50PC030 Typical Unit Operating Pressures and Temperatures50PC042 Typical Unit Operating Pressures and Temperatures Water Air Temp50PC048 Typical Unit Operating Pressures and Temperatures Unit Start-Up Heating Mode50PC060 Typical Unit Operating Pressures and Temperatures Unit Start-Up with Wshp Open ControlsBACview6 Display Interface A50-8444Pressure 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 Complete C Control OperationUnits with Aquazone Deluxe D Control Units with Wshp Open Multiple ProtocolPage Auxiliary Modulating Hot Water/Steam Heating Reheat Complete C and Deluxe D Board System Test LED Status Description of Operation Alarm Relay Complete C Control LED Code Fault DescriptionsLED Fault Description Code Aquazone Deluxe D Control LED IndicaDescription Status LED Test LED ServiceESD A50-6286ef Refrigerant Charging’ to 4’ Air Coil Fan Motor Removal TroubleshootingA50-8163 Air temperature out of range TroubleshootingCooling mode FP1125 F or Reduced or no airflow in heatReduced airflow in cooling Reduced or no water flowAlarm Status Appendix a Wshp Open Screen ConfigurationStatus SensorMaintenance Appendix a Wshp Open Screen ConfigurationSystem Settings ConfigurationSchedule Service Appendix a Wshp Screen Open ConfigurationTest Point Name Password Editable Range Default Level Configuration ServiceScreen Name Alarm Page Copyright 2011 Carrier Corporation II. START-UP 50PCH,PCV START-UP ChecklistCooling Cycle Analysis Heating Cycle AnalysisA50-8445 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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