To Next PageTo Next PageWhy is the discharge air temperature source failing in my Trane RRU120 D B?
A discharge air temperature source failure in Trane Air Handlers can occur if the BAS communication is down, or if there's a failed sensor or improper sensor installation.
How to troubleshoot a Trane Air Handlers OAD proving switch?
To troubleshoot an OAD proving switch issue in Trane Air Handlers, check for voltage at the actuator and check for a failed OAD power transformer, both at the UC. Also, check for continuity through the end switch at the UC.
General| Model | RRU120 D B Series |
|---|---|
| Type | Air Handler |
| Cooling Capacity | 120, 000 BTU/h |
| Cooling Capacity (Tons) | 10 Tons |
| Heating Capacity | 120, 000 BTU/h |
| Heating Capacity (MBH) | 120 MBH |
| Phase | 3 |
| Refrigerant | R-410A |
| Frequency | 60 Hz |
| Airflow | 4000 CFM |
General safety warnings, gas safety, and installation precautions.
Explanation of advisories, environmental concerns, and refrigerant handling.
Hazards and requirements for proper field wiring and grounding.
Requirements for PPE and adherence to Environmental, Health, and Safety policies.
Safety alerts for gas, flammable vapors, and specific installation requirements.
Details on copyright, trademarks, and document revision history.
Critical safety procedures for servicing and an overview of unit components.
Description of various unit features and control system operations.
Safety precautions for fiberglass and procedures for unit inspection.
Requirements for unit clearances and warnings regarding combustible materials.
Safety warnings and procedures for rigging, lifting, and handling heavy objects.
Definitions of terms, control inputs, and sequences for occupied modes.
Detailed operation sequences for occupied cooling, dehumidification, and heating.
How space overrides affect operation and sequences for unoccupied modes.
Details on unoccupied modes and the emergency stop function.
Safety warnings for installation and guidelines for supply ductwork.
General installation checklist, power requirements, and drain configuration.
Procedures for field wiring, control transformers, and 24 Vac control wiring.
Guidelines for DC analog/output wiring and conductor sizing.
Checklist for electrical connections, airflow, belts, and capacitor safety.
Importance of correct voltage and phase for motor operation and safety.
Operation of crankcase heaters and initialization of control systems.
Steps for starting compressors, including pre-operation, testing, and safety.
Safe procedures for starting the unit's direct gas-fired heating system.
Verifying gas pressure and airflow, and checking acceptable pressure ranges.
Components of the burner gas train and the sequence for initiating burner operation.
Gas train components and starting sequences for higher capacity systems.
Operation of the flame relay module during initiate, standby, purge, and ignition.
Using configuration jumpers and operating the direct spark ignition gas valve.
Procedures for high fire, low fire, and ignition cycle testing.
Procedures for inspecting, adjusting, and replacing fan belts.
Maintenance for filters and seasonal checks during cooling and heating seasons.
Yearly inspection of the heating system and procedures for burner cleaning.
Inspecting gas ports and cleaning outdoor coils.
Procedures for cleaning evaporator and microchannel coils.
How to operate and adjust the Refrigerant Capacity Control (RCC).
A template for recording maintenance data during the cooling season.
Troubleshooting guide for microprocessor control and sensor failure alarms.
Detailed list of UC600 alarms, causes, and troubleshooting steps.
Information on gas ignition controls and troubleshooting airflow issues.
Understanding lockout modes and measuring flame current for troubleshooting.
Guide for troubleshooting flame relay safety shutdowns and lockouts.
