Desert Master
40RM/38AR

38AR Features

• Up to 11.0 EER
• Constructed for long life
• Efficient operation
• Controls for performance dependability
• Innovative Carrier 40RM packaged air handlers are custom matched to 38AR condensing units
• Indoor air quality (IAQ) features
• Rugged dependability
• Coil flexibility
• Easier installation and service

40RM Features

• Multi-position design can be installed horizontally or vertically without modification
• Standard double skin units for better indoor air quality (IAQ)
• Polyester powder painted zinc coated steel panels provide additional protection against rusting & discoloration in areas with high UV factor
• High-static design meets a wider range of applications than competitive packaged air handler lines
• Economizer accessory provides ventilation air and "free'' cooling
• Cooling coils with mechanically-bonded fins provide peak heat transfer
• Standard factory-installed thermo- static expansion valves(TXVs) on 40RM units
• Standard sloped drain pans
• 1" Washable filters with frontal access to remove them
• Easy installation and maintenance; removal of one side panel allows access to serviceable  components; external piping connections

38AR Options

• Enviro-Shield™ condenser options offer pre-coated coils that provide protection in mild coastal environments. Several options are available to match coil protection to site conditions for optimum durability. See table below. Consult your Carrier representative for further information.
• Non-fused disconnect switch to remove power locally at the condensing unit. This switch also includes a power lockout capability to protect the service person. This lockout switch saves the service person time and effort because there is no need to access a distant disconnect switch while servicing the unit.
• Carrier’s line of thermostats provide both programmable and non-programmable capability with the new Debonair® line of commercial programmable thermostats. The Commercial Electronic thermostats provide 7-day programmable capability for economical applications.
• PremierLink™ Controller is a field retrofit split system control compatible with the Carrier Comfort Network (CCN) and other building automation systems (BAS). This control is designed to allow users the access and ability to change factory-defined settings thus expanding the function of the standard unit.

Condenser Coil Options

40RM Options

• One-row steam coil has copper tubes and aluminum fins. The Inner Distributing Tube (IDT) design provides unifor m temperatures acrossthe coil face.The steam coil hasa broad operating pressure range; up to 175 psig (1207 kPag) at 400 F (204.4 C) and up to 300 psig (2069 kPag) at 300 F (148.9 C). The IDT steam coils are especially suited to applications where sub-freezingair enters the unit.
• Electric resistance heat coils have an open-wire design and are mounted in a rigid frame. Safety cutouts for high temperature conditions are standard. Terminal block for single-point power connection is included.
• Economizer (enthalpy controlled) provides ventilation air and "free" cooling if outside ambient temperature and humidity are suitable. Can also be used with CO2 sensors to help meet indoor air quality requirements.
• Discharge plenum directs the air discharge directly into the occupied space; integral horizontal and vertical louvers enable redirection of airflow. Accessory is available unpainted or painted. Field assembly required.
• Standard units available from the factory are in double skin.
• Return-air grille provides a protective barrier over the return-air opening and givesa finished appearance to units installed in the occupied space. Accessory is available unpainted or painted.
• Sub-base provides a stable, raised platform and room for condensate drain trap connection for vertical floor-mounted units. Accessory is available unpainted or painted.
• Overhead suspension package includes necessary brackets to support units in horizontal ceiling installations.
• CO2 sensors can be used in conjunction with the economizer accessory to help meet indoor air quality requirements. The sensor signals the economizer to open when the CO2 level in the space exceeds the set point. A Carrier Comfort System programmable thermostat can be used to override the sensor if the outside air temperature is too high or too low.
• Carrier's line of thermostats provide both programmable and non-programmable capability with the new Debonair line of commercial programmable thermostats, the TEMP System controls offer communication capability with staged heating and cooling, the Commercial Electronic thermostats provide 7-day programmable capability for economical applications,while the non-programmable thermostats offer a multitude of staged heating and cooling sub-base options.
• Condensate drain trap includes an overflow shutoff switch that can be wired to turn off the unit if the trap becomes plugged. Kit also includes a wire harness that can be connected to an alarm if desired. The transparent trap is designed for easy service and maintenance.