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General| Model Number | 50YEV |
|---|---|
| Category | Heat Pump |
| Refrigerant | R-410A |
| Voltage | 208/230V |
| Stages | Variable Speed |
Warnings, cautions and notices for safe operation and handling of equipment.
Procedures for checking shipment for damage and shortages upon receipt of equipment.
Guidelines for storing equipment in its original packaging in a clean, dry area.
Methods to protect units from physical damage and contamination on the job site.
Instructions for preparing units for installation, including checks and procedures.
Guidelines for selecting an indoor location for horizontal units, ensuring service access.
Instructions for suspending horizontal units using field-supplied threaded rods and factory vibration isolators.
Step-by-step instructions for converting the unit's air discharge from side to back.
Instructions for converting the unit's air discharge from back to side.
Guidelines for sizing and installing duct systems for optimal airflow and noise reduction.
Guidelines for selecting an indoor location for vertical units, ensuring service access.
Description of vertical unit condensate trapping and piping requirements.
Instructions for mounting the external flow controller beside the unit.
Locating and marking underground utilities and planning loop installation.
Guidelines for installing closed loop ground source system piping materials.
When antifreeze is required, types, and calculation for protection levels.
Setting the low temperature cutout for antifreeze systems using the CXM control.
Description of open loop piping, shut-off valves, and flushing procedures.
Guidelines for water quality parameters affecting scaling, corrosion, and erosion.
Sizing and selection of pressure tanks and pumps for ground water systems.
Placement and function of water control valves for heat exchangers.
Methods for regulating water flow through the heat pump system.
Setting the low temperature limit for open loop systems to prevent freeze damage.
Instructions for installing and connecting the HWG system, including sensor and pump wiring.
Description of the HWG pump test function via DIP switch SW10.
Setting the HWG temperature setpoint using DIP switch SW11.
Enabling or disabling the HWG operation using DIP switch SW12.
Steps to prepare the hot water tank for HWG connection, including draining and flushing.
Instructions for routing and installing HWG water piping and insulation.
Procedure for refilling the water tank and purging air from HWG piping.
Steps for initial startup of the HWG system after installation.
Guidance on ensuring correct voltage and phase for unit wiring.
Instructions for making line voltage connections to the contactor terminal.
Information on switching the transformer tap for 208 Volt operation.
How to change blower fan speed for PSC motors using wire connections.
Wiring thermostats to the CXM or ECM interface board.
Selecting the low water temperature limit using jumper JW3 on the CXM control.
Connecting accessory devices like water valves to the CXM control terminal.
Wiring and operation of external solenoid valves for water shut-off.
Piping and control for two-stage units using parallel solenoid valves.
Guidelines for thermostat location, mounting, and wiring.
Determining cooling CFM based on tap settings for ECM motors.
Determining heating CFM based on tap settings for ECM motors.
Determining auxiliary/emergency heat CFM based on tap settings.
Adjusting airflow by +/- 15% or using TEST mode for ECM blowers.
Selecting and enabling dehumidification modes for ECM blower control.
Using test mode to check CXM control operation and diagnose faults.
Configuring CXM control settings like water coil low temp and alarm relay.
Setting DIP switches for unit performance sentinel, stage 2, and DDC output.
Safety features protecting the compressor, heat exchangers, and wiring from damage.
Understanding fault retry, lockout modes, and specific fault codes for CXM controls.
Using the CXM board's LED to diagnose status or last fault.
How the CXM control manages start-up sequences, delays, and compressor operation.
Thermostat compatibility and signal descriptions for CXM control.
Environmental and water temperature limits for proper unit operation.
Specific start-up conditions and notes for unit commissioning.
Pre-powering checks for unit and system components to ensure readiness.
Step-by-step guide for starting up the unit and verifying operation.
Operating pressure and temperature data for GT-PX series units.
Continued operating pressure and temperature data for GT-PX series units.
Operating pressure and temperature data for GT-PG series units.
Continued operating pressure and temperature data for GT-PG series units.
Continued operating pressure and temperature data for GT-PG series units.
Continued operating pressure and temperature data for GT-PG series units.
Periodic maintenance schedule for water coils in high mineral content areas.
Maintenance for water coils in closed loop systems with high dirt or debris.
Maintenance for HWG coils, especially with hard or unsoftened potable water.
Importance of clean filters for performance and instructions for cleaning/replacement.
Cleaning and treating condensate pans and drains to prevent buildup and overflow.
Annual amperage checks for compressor motors to ensure proper operation.
Lubrication guidelines and annual checks for fan motors.
Cleaning the air coil to maintain maximum performance, caution about sharp fins.
Cleaning the cabinet to prevent corrosion and ensure indoor air quality.
Guidelines for servicing the refrigerant circuit while maintaining sealed integrity.
Preliminary checks and guidelines for troubleshooting operational difficulties.
Simple verification of CXM board inputs and outputs to diagnose issues.
Checking 24VAC thermostat inputs to the CXM board using a voltmeter.
Checking continuity on sensor inputs at the CXM board connector.
Verifying compressor relay, fan signal, alarm relay, and electric heat outputs.
Entering test mode on CXM for diagnostics and speeding up time delays.
Using flowcharts to diagnose suspected problems with the CXM board.
