Trane Modular 20 to 35 Tons Liste des pièces Page 81
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PKG-PRC003U-EN 81
Mechanical Specifications
Agency Listing
The unit shall have the US/Canada Underwriter’s agency listing.
IntelliPak™ Control Options
Air Volume/Temperature Control
Zone Temperature Control
This option includes a zone sensor, microprocessor unit control module, a microprocessor
compressor controller, and a unit-mounted human interface panel.The unit operates at a design
airflow based on the fan and motor drive selections.
Supply Air Temperature Control With Variable Frequency Drive
This option controls the self-contained unit from the discharge air temperature using a field-
mounted variable frequency drive (VFD).The VFD safely varies the fan motor speed to allow the
motor to meet the dynamic requirements at the motor shaft and meet the system static. Other
control components include a discharge air microprocessor controller and discharge air sensor.
The microprocessor controller coordinates the economizer control and cooling stages with
discharge air temperature reset capabilities.The VFD receives a 0-10vdc signal from the unit
microprocessor based upon supply static pressure and causes the drive to accelerate or decelerate
as required to maintain the supply static pressure setpoint.
Supply Air Temperature Control With Variable Frequency Drive with Bypass
Manual bypass control provides full nominal airflow and zone temperature control in the event of
a drive failure.The VFD with bypass is field mounted. A motor overload relay and fuses are
provided to properly size motor protection during both drive and bypass modes.
Waterside Economizer
The waterside economizer option takes advantage of cooling tower water to either pre-cool the
entering air to aid the mechanical cooling process or, if the water temperature is low enough,
provide total system cooling. Waterside economizing enables when the unit’s entering water
temperature is below the unit’s entering mixed air temperature by a minimum of 4°F plus the
economizer’s approach temperature.The approach temperature default is 4°F and adjustable from
0 to 9°F. Waterside economizing disables when the unit’s entering water temperature is not below
the unit’s entering mixed air temperature by at least the water economizer approach temperature.
The approach temperature defaults to 4°F and is adjustable from 0 to 9°F.The economizer acts as
the first stage of cooling. If the economizer is unable to maintain the supply air setpoint, the unit
control module brings on compressors as required to meet the setpoint.
The waterside economizer includes a coil, modulating valves, controls, and piping with cleanouts.
The coil construction is ½-inch OD seamless copper tubes expanded into aluminum fins.The
evaporator and economizer coils share a common sloped (IAQ) drain pan. Drain pan options are
either galvanized or stainless steel, and are insulated and internally trapped.
The waterside economizer coil is available with either a two or four row coil, with no more than 12
fins per inch.The tubes are arranged in a staggered pattern to maximize heat transfer.The coil has
round copper supply and return headers with removable cleanout and vent plugs.The optional
mechanical cleanable economizer has removable cast iron headers to allow easy mechanical
cleaning of the tubes.The waterside working pressure is rated for 400 psig (2758 kPa).
Airside Economizer
Units with the airside economizer option are equipped with the necessary control sequences to use
outside air for the first stage of cooling, in occupied or unoccupied mode and when ambient
conditions are favorable for economizing. Inherent in the unit controller is the ability to suppress
the setpoint below the normal unit setpoint.This allows the building to improve comfort levels
when possible, and at the same time, optimize building mechanical cooling operation for peak
- Product Catalog 1
- Introduction 2
- Table of Contents 3
- 6 PKG-PRC003U-EN 6
- Enhanced Serviceability 7
- Standard Features 7
- Standard Control Features 7
- Optional Features 8
- Field Installed Accessories 8
- Features and Benefits 10
- Interoperability with BACnet 10
- LowTorque Variation 11
- Suction Gas Cooled Motor 11
- Application Considerations 12
- Isolation Recommendations 14
- Condenser Water Piping 15
- 16 PKG-PRC003U-EN 16
- Selection Procedure 17
- Unit Selection 18
- Model Number Descriptions 19
- Self-Contained Ship 21
- With Accessory 21
- Model Number 21
- Remote Air-Cooled 21
- Condenser 21
- General Data 22
- Performance Data 25
- Waterside Pressure Drop 28
- Water-Cooled Unit Performance 30
- 25-ton Water-Cooled 32
- 30-ton Water-Cooled 34
- 35-ton Water-Cooled 36
- Air-Cooled Unit Performance 38
- 25-ton Air-Cooled 39
- 32-ton Air-Cooled 40
- Heating Performance 41
- Controls 42
- Analog inputs 43
- Binary inputs 43
- Binary output 43
- Human Interface Panel (HI) 44
- Morning Warmup 45
- Ventilation Override (VOM) 45
- Demand Limiting Binary Input 47
- 48 PKG-PRC003U-EN 48
- Airside Options 49
- Cooling/Airside Economizer 50
- Heating: Electric 50
- Supply Air Tempering 50
- PKG-PRC003U-EN 51 51
- 52 PKG-PRC003U-EN 52
- Zone Sensor Options 53
- CV: BAYSENS108 54
- CV: BAYSENS110 54
- BAYSENS074 55
- BAYSENS073 55
- Electrical Data 56
- Dimensions and Weights 59
- DETAIL A 71
- DETAIL B 71
- MOUNTING BASE 71
- SEE DETAIL A 71
- DETAIL A 75
- DETAIL B 75
- Service Clearances 78
- Mechanical Specifications 79
- 80 PKG-PRC003U-EN 80
- IntelliPak™ Control Options 81
- Comparative Enthalpy Control 82
- Airside Economizer Interface 82
- PKG-PRC003U-EN 83 83
- 84 PKG-PRC003U-EN 84
- PKG-PRC003U-EN 85 85
- 86 PKG-PRC003U-EN 86
- Protective Coating Option 87
- Low Ambient Damper Option 87
- Louvered Coil Guards Option 87
- Agency Listing 87
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