Carrier PTV, 50PTH specifications Horizontal Unit Pitch, Trap Condensate Drain

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Each unit must be installed with its own individual vent and means to flush or blow out the condensate drain line. Do not in- stall units with a common trap or vent.

1/4” Pitch for Drainage

Pitch Toward

Drain

Drain Connection

Fig. 10 — Horizontal Unit Pitch

NOTE: Trap should be deep enough to offset maximum unit static difference. A 4-in. trap is recommended.

Fig. 11 — Trap Condensate Drain

Be sure to support the line where anticipated sagging from the condensate or when “double trapping” may occur.

If condensate pump is present on unit, be sure drain connec- tions have a check valve to prevent back flow of condensate into other units.

Step 7 — Pipe Connections — Depending on the application, there are 3 types of WSHP piping systems to choose from: water loop, ground-water and ground loop. Refer to Piping Section of Carrier System Design Manual for addi- tional information.

All WSHP units use low temperature soldered female pipe thread fittings for water connections to prevent annealing and out-of-round leak problems which are typically associated with high temperature brazed connections. Refer to Table 1 for con- nection sizes. When making piping connections, consider the following:

Use a backup wrench when making screw connections to unit to prevent internal damage to piping.

Insulation may be required on piping to avoid condensation in the case where fluid in loop piping operates at tempera- tures below dew point of adjacent air.

Piping systems that contain steel pipes or fittings may be subject to galvanic corrosion. Dielectric fittings may be used to isolate the steel parts of the system to avoid galvanic corrosion.

WATER LOOP APPLICATIONS — Water loop applications usually include a number of units plumbed to a common pip- ing system. Maintenance to any of these units can introduce air into the piping system. Therefore, air elimination equipment comprises a major portion of the mechanical room plumbing.

The flow rate is usually set between 2.25 and 3.5 gpm per ton of cooling capacity. For proper maintenance and servicing, pressure-temperature (P/T) ports are necessary for temperature and flow verification.

Cooling tower/boiler systems typically utilize a common loop maintained at 60 to 95 F. The use of a closed circuit evap- orative cooling tower with a secondary heat exchange between the tower and the water loop is recommended. If an open type cooling tower is used continuously, chemical treatment and fil- tering will be necessary.

In addition to complying with any applicable codes, consid- er the following for system piping:

3/4” Copper FPT/PVC

1/2”

Water

Connections

3/4” PVC Vent

1/4” per foot slope to drain

1/2”

Alternate

Condensate

Location

Piping systems using water temperatures below 50 F require 1/2-in. closed cell insulation on all piping surfaces to eliminate condensation.

Avoid all plastic to metal threaded fittings due to the poten- tial to leak. Use a flange fitted substitute.

Teflon tape thread sealant is recommended to minimize internal fouling of the heat exchanger.

Use backup wrench. Do not overtighten connections.

Route piping to avoid service access areas to unit.

Flush the piping system prior to operation to remove dirt and foreign materials from the system.

NOTE: Unit does not need to be sloped toward drain.

Fig. 12 — Vertical Condensate Connection

VENTING — Install a vent in the condensate line of any application that may allow dirt or air to collect in the line. Con- sider the following:

Always install a vent where an application requires a long horizontal run.

Always install a vent where large units are working against higher external static pressure and to allow proper drainage for multiple units connected to the same condensate main.

GROUND-WATER APPLICATIONS — Typical ground- water piping is shown in Fig. 13. In addition to complying with any applicable codes, consider the following for sys- tem piping:

Install shut-off valves for servicing.

Install pressure-temperature plugs to measure flow and temperature.

Connect boiler drains and other valves using a “T” connec- tor to allow acid flushing for the heat exchanger.

Do not overtighten connections.

Route piping to avoid service access areas to unit.

Use PVC SCH80 or copper piping material.

NOTE: PVC SCH40 should not be used due to system high pressure and temperature extremes.

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Contents Contents Safety ConsiderationsInstallation GeneralPhysical Data 50PTH, PTV, PTD026-072 Units 50PTH026-072 Dimensional Data Typical Installation 50PTH Unit Aux Electric Heat Disconnect50PTV Dimensional Data 50PTD Dimensional Data Side Discharge Back DischargeRotate Install Condensate DrainMount the Unit Move to SideHorizontal Unit Pitch Trap Condensate DrainTypical Ground-Water Piping Installation Drains field-installedWater Quality Guidelines Wire Field Power SupplyMetal Hose Minimum Bend Radii 50PTH,PTV,PTD Electrical Data Alarm Relay Contacts Sensor, Water Coil Freeze ProtectionRVS TransECM BM ECM Alarm Relay Contacts Discharge Temp Switch Relay/Contactor Coil A50-8363 A50 8364LWT SPTA50-8571 Wshp Open ControlField-Supplied Sensors for Wshp Open Controller Rnet Wiring SpecificationsSPT Sensors Wire Terminal Wire Field ControlsRnet Wiring A50-8443A50-8441 A50-8141A50-7764tf A50-8442Heating Settings Cooling SettingsDehumidificaton Mode Settings CFM Adjust SettingsBlower Performance Data Wshp Open Fan Only / Low Fan and Med Fan Airflow PRE-START-UPWshp Open High Fan Airflow Deluxe D Control Jumper Settings Complete C Control Jumper SettingsField Selectable Inputs Humidistat/Dehumidistat Logic Deluxe D DIP Switch Settings DIP Switch Block S2 Accessory 1 Relay OptionsDIP Switch Block S2 Accessory 2 Relay Options Units with Modulating Hot Water Reheat HWR OptionMode Input Output HWR Operating ModesA50-8145 Water Out START-UPOperating Limits Operating Limits 50PTH, PTV, PTD UnitsUnit Start-Up Heating Mode Unit Start-Up Cooling ModeWater Temperature Change Through Heat Exchanger Suction Discharge Super Sub Water Air Temp Unit Start-Up with Wshp Open Controls A50-8444PTD Unit 50PTH, PTV Water Temperature F GPMCoaxial Water Pressure Drop 026 038 049Operation Approximate Fluid Volume gal Per 100 Ft of PipeAntifreeze Percentages by Volume Units with Aquazone Complete C ControlUnits with Wshp Open Multiple Protocol Page Page LED Fault Description Code Complete C Control LED Code Fault DescriptionsLED Status Description of Operation Alarm Relay Complete C and Deluxe D Board System TestAlarm Relay Aquazone Deluxe D Control LED IndicaService Air Coil Fan Motor Removal TroubleshootingRefrigerant Charging Replacing the Wshp Open Controller’s Bat70.0 90.080.0 KOhm 60.0 50.0Page ECM Troubleshooting Fault Description SolutionECM Pin Connectors A50-8448ECM Troubleshooting Flow Diagram A50-8447Fault Heating Cooling Possible Cause Solution Wshp TroubleshootingGood Practices Over/Under Voltage Code 7 Auto ResettingNo Fault Code Shown Performance MonitorLow Suction Pressure Temperature in HeatingHigh Head Pressure Low Discharge AirStatus 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 Page Copyright 2010 Carrier Corporation 50PTH,PTV,PTD START-UP Checklist II. START-UPA50-8449 Heating Cycle AnalysisCooling Cycle Analysis A50-8450