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General| Model Number | 50YDD |
|---|---|
| Category | Heat Pump |
| Refrigerant | R-410A |
| Voltage | 208/230V |
| Phase | 1 |
| Cooling Capacity | 30, 000 BTU/h |
| Heating Capacity | 30, 000 BTU/h |
Explains unit type, size, configuration, and other general model details.
Describes warnings, cautions, and notices relevant to product operation and safety.
Details checking shipment for shortages/damage and proper equipment storage procedures.
Guidance on protecting units on the job site and preparing them for installation.
Specifies indoor location requirements and necessary service clearances for horizontal units.
Details suspension methods using factory-installed hanger kits and field-supplied rods.
Instructions for cleaning the air coil for maximum performance and longevity.
Guides for converting between side and back discharge configurations.
Explains limitations on converting return air sides due to piping changes.
Details proper condensate trap installation, venting, and slope requirements.
Guidelines for sizing ducts, reducing air noise, and ensuring proper airflow.
Specifies indoor location requirements and necessary service clearances for vertical units.
Illustrates unit mounting with an air pad and ducted return air connections.
Methods for sound control in mechanical rooms/closets using baffles and isolation pads.
Explains condensate trapping using internal loops and necessary venting.
Details flow controller mounting and proper installation of water fittings.
Locating utilities and guidelines for closed loop piping materials and flow rates.
Requirements for antifreeze use and setting the low temperature cutout.
Details open loop systems, water quality standards, and scaling potential.
Criteria for selecting pressure tanks, pumps, and water control valves.
Methods for regulating water flow and control strategies.
Setting the FP1 limit for antifreeze protection based on refrigerant temperature.
Explains how HWG utilizes excess heat and shows typical installation examples.
Details HWG installation, sensors, microprocessor control, and DIP switches.
Describes HWG pump operation, status LEDs, and fault codes.
Steps for preparing the water tank and installing HWG water piping.
Step-by-step procedure for starting up the HWG system.
Electrical specifications for GT-PX (50YD) series units.
Electrical specifications for GT-PG (50YE) series units.
Requirements for line voltage wiring, grounding, and power connection.
How to change blower speed for PSC motors using wire connections.
Wiring thermostats to CXM or ECM boards for proper control.
Field selection of low water temp limit using jumpers for antifreeze protection.
Connecting accessories via terminal strip and wiring water solenoid valves.
Piping configuration for two-stage solenoid valves to manage water flow.
Guidelines for thermostat placement and wiring for ECM/PSC fan units.
Explains CFM settings for cooling, heating, and auxiliary/emergency heat modes.
Describes CFM adjustment options and humidity control settings.
Settings for cooling, heating, and aux/emerg heat modes on ECM boards.
Diagrams showing the layout of ECM interface boards (Versions I, II, III).
Discusses test mode, jumper settings for temperature limits, and alarm relay.
Explains DIP switch settings for various features like UPS and stage selection.
Explains the behavior of the CXM LED and alarm relay under different conditions.
Covers safety features, fault retry, lockout, and general fault types.
Details specific faults like pressure, temperature, condensate, voltage, and UPS.
How the CXM LED indicates status and diagnostic fault codes.
Describes control behavior during start-up, including delays and safety checks.
Table mapping thermostat signals to unit operations for different models.
Discusses thermostat compatibility, signals, and anticipation leakage current.
Explains thermostat signal connections to the CXM control.
Explains factors affecting operating limits: air temp, water temp, ambient temp.
Lists operating limits for GT-PX and GT-PG units in cooling and heating modes.
Notes on starting conditions and limits for building commissioning.
Checklist for unit and system before powering, including valves, wiring, and components.
Step-by-step procedure for unit start-up, including fan operation and airflow.
Detailed steps for performing cooling and heating tests, checking temperatures and pressures.
Final checks for leaks, noise, and guidance if the unit fails to operate.
Final instruction to complete and return warranty registration paperwork.
Pressure drop data for GT-PX and GT-PG unit heat exchangers.
Data on water temperature changes through the heat exchanger.
Correction factors for antifreeze solutions in cooling and heating modes.
Table showing operating pressures and temperatures for GT-PX units.
Continuation of operating pressures and temperatures for GT-PX units.
Table showing operating pressures and temperatures for GT-PG units.
Continuation of operating pressures and temperatures for GT-PG units.
Continuation of operating pressures and temperatures for GT-PG units.
Continuation of operating pressures and temperatures for GT-PG units.
Guidance on maintaining water coils in high mineral areas and periodic cleaning.
Maintenance for other water loop applications and dealing with dirt/debris.
Maintenance for HWG coils, emphasizing potential scaling with hard water.
Importance of clean filters for performance and maintenance procedures.
Preliminary checks and basic troubleshooting steps for the CXM board.
Checking field inputs, sensor inputs, and outputs for proper CXM operation.
Explanation of test mode and troubleshooting flowcharts for CXM diagnostics.
Visual guide for diagnosing CXM issues by following fault recognition steps.
Troubleshooting for common faults like power, HP, pressure, and temperature limits.
Troubleshooting for condensate, voltage, UPS, and no-fault conditions.
Troubleshooting when only compressor runs or unit doesn't operate in cooling.
Troubleshooting for capacity, head pressure, suction pressure, discharge temp, and humidity.
Sections for recording heating and cooling cycle data, including pressures and temperatures.
Details the warranty terms, conditions, limitations, and labor allowance.
