TRANE AH541 Air-Handler Controller User Manual
- June 9, 2024
- Trane
Table of Contents
TRANE AH541 Air-Handler Controller User Manual
Overview
The Tracer AH541 air-handler controller is available for field installation on constant-volume and variable-air-volume (VAV) air handlers. The Tracer AH541 controller provides the same functionality as the Tracer AH540 controller, which is factory-installed on Trane air handlers.
Applications
The Tracer AH541 controller supports a variety of air-handler configurations
that conform to the LonMark® Space Comfort Controller (SCC) profile or the
Discharge Air Controller (DAC) profile. Possible configurations include:
- Cooling-only unit
- Heating-only unit without bypass
- Heating-only unit with bypass
- Cooling and heating unit (coils in either order) without bypass
- Heating and cooling unit (coils in this order) with bypass for the heating coil
- Heating and cooling unit (coils in this order) with bypass for both coils
- Heating cooling changeover (single coil)
- Heating cooling changeover (single coil) with electric heat
Heating options
- Hydronic
- Steam
- Electric (staged)
Cooling options
- Hydronic
- DX (up to four stages)
Product models
The following Tracer AH541 models are available:
-
Enclosure with door-mounted operator display
-
Enclosure without operator display
-
Frame-mounted controller (termination board and circuit board in a plastic frame assembly)
The following operator-display models are available: -
Stand-alone operator display
-
Portable operator display
-
Door-mounted operator display retrofit kit
For more detailed information on each model, see “Product models” on page 4.
™ ® The following are trademarks or registered trademarks of their respective companies: LonTalk and LonMark from Echelon Corporation; Rover, Tracer, and Tracer Summit from American Standard Inc.
Product models
Tracer AH541 models
Several Tracer AH541 models are available. These models are illustrated in
Figure 1 on page 5. For dimensions and other information, refer to
“Specifications” on page 11.
Tracer AH541 in a NEMA-1 enclosure
The Tracer AH541 with enclosure consists of a termination board, a circuit
board, and a line-to-low voltage transformer mounted in an enclosure compliant
with National Electrical Manufacturers Association (NEMA) type-1 standards.
The enclosure has a hinged door and plenty of room for input and output
wiring. The complete assembly is UL-listed.
The controller is available in a NEMA-1 enclosure with or without an operatordisplay touch screen mounted in the door. Enclosures without displays can be upgraded at any time with a stand-alone operator display or a retrofit enclosure door with a display.
Frame-mounted Tracer AH541
The frame-mounted Tracer AH541 consists of a circuit board and a termination
board mounted in a twopiece modular frame assembly. This modular design allows
the circuit board to be stored at a safe location while installation and
wiring are completed. The frame-mounted Tracer AH541 can be mounted in
existing equipment or enclosures.
Operator display models
Operator-display touch screens are available as an option for all Tracer AH541
models. The operator-display options are illustrated in Figure 2 on page 5.
Stand-alone operator display
The stand-alone operator display is designed for permanent local connection to
a Tracer MP580/581 or AH540/541 controller (Version 1.5 or higher). The stand-
alone operator display includes a 7-day time clock to provide scheduling
capabilities for the associated controller. The 10-foot (3 meter) connector
cable can be extended up to 150 feet (46 meters) with additional wire.
Portable operator display
The portable operator display is designed for temporary connection to a Tracer
MP580/581 or AH540/541 controller (Version 1.5 or higher). The operator-
display touch screen is mounted in a resin enclosure, which is placed in a
padded, protective carrying case. A ten-foot (three meter) connector cable is
included.
Retrofit door-mounted operator display
The retrofit door-mounted operator display is a complete enclosure door with
an operator-display touch screen mounted in it. Use this kit to upgrade an
enclosure that does not have an operator display. The operator display works
with any Tracer MP581 or Tracer AH541 controller.
Figure 1: Tracer AH541 models
Figure 2: Operator display models
Features
Duct static-pressure control
In the variable-air-volume (VAV) mode, the Tracer AH541 controls duct static
pressure. When the supply fan is on, the controller compares the duct
staticpressure input to the duct static setpoint and adjusts the supply fan
speed accordingly. If the controller does not receive a valid duct static-
pressure value, it generates a diagnostic and shuts down the unit.
Space dehumidification
The AH541 controller provides both occupied and unoccupied dehumidification
control for space temperature control applications. The dehumidification
control sequence is allowed on unit configurations with hydronic or DX cooling
and hydronic or electric reheat. A hardwired or communicated space relative
humidity value is required.
Filter status
The Tracer AH541 can monitor the filter status in one of two ways:
- By tracking the cumulative run hours of the supply fan. When the run time expires, the controller sends a notice to the operator display and Tracer Summit system that maintenance is recommended.
- From a positive-proof switch wired to binary input IN11.
Generic binary input
The occupancy binary input can be configured as a generic binary input for use
as a network point with the Tracer Summit system. The generic input does not
affect unit operation.
Manual output test
The manual output test allows a service technician to quickly check all
outputs for proper operation. Each press of the Test button on the circuit
board steps through the outputs, energizing them in succession.
Emergency override
The emergency override mode can be selected from the Rover service tool or the
Tracer Summit system. The operator can use this mode to pressurize,
depressurize, or purge the air from a building space by overriding the
outdoorair damper, supply fan, and exhaust fan.
System integration
The Tracer AH541 controller communicates using the LonTalk communication
protocol and a TP/FT-10 communication channel. The controller can be
configured to conform to the LonMark® Space Comfort Controller (SCC) profile
or the Discharge Air Controller (DAC) profile.
Operator display
The operator-display touch screen has a common look and feel across Tracer
controllers. This similarity simplifies training and enhances operator
efficiency in buildings with multiple Tracer controllers. Because the operator
display has no buttons, keyboard, or mouse, it is easy to learn and use. The
operator display is designed for connection to a Tracer MP580/581 or Tracer
AH540/541 controller (Version 1.5 or higher).
Available models
The operator display is available in portable, stand-alone, and door-mounted
models, or as a retrofit door-mounted kit. The operator-display models are
illustrated in Figure 2 on page 5.
Multiple-language support
The operator display supports multiple languages, which can be can be selected
through the Rover service tool. English, Spanish, and French-Canadian (Version
2.0 or higher) are currently available.
Navigation
Navigation of the touch screen is intuitive, with logical paths to find
information in the fewest steps. The Home screen, shown in Figure 3, appears
on power-up, and can be reached from any page by pressing the Home button. The
Home screen menu shows information about the controller and has buttons to
access common tasks and information.
Figure 3: Home screen
From the touch screen, the operator can:
- Change setpoints and timer values
- Calibrate the space sensor value
- View input/output and communication status
- View and reset alarms
- Schedule 7-day start /stop times and exception schedules
- Override schedules and outputs
- Perform a manual output test
- Balance the hydronic system
Network architecture
Tracer AH541 controllers can operate as stand-alone controllers, as part of a peerto- peer network, or as part of a Tracer Summit building automation system (see Figure 4).
Figure 4: Tracer AH541 controller as part of a building automation system with Trane LonTalk controllers
Inputs and outputs
The Tracer AH541 controller has the following inputs and outputs (illustrated in Figure 5):
- Six binary outputs
- Five analog outputs
- Six analog inputs
- Six binary inputs
- Duct static-pressure input
- Universal analog input on main controller
The inputs and outputs must be used for the functions listed in Figure 5. For example, an outside-air temperature sensor can be connected only to terminal IN5.
Note that analog output 6 (AO6) is not used.
Figure 5: Wiring diagram
Enclosure interior
Figure 6 shows the interior of the Tracer AH541 NEMA-1 enclosure. Significant space is available for wiring inputs and outputs. Wires should be routed over the optional pressure sensor.
Figure 6: Tracer AH541 enclosure interior
Dimensions
Figure 7: Tracer AH541 enclosure dimensions
Figure 8: Frame-mounted Tracer AH541 dimensions
Specifications
Power requirements
Nominal rating: 24/120/230 Vac;
50/60 Hz; 1 phase
Voltage utilization range
24 Vac (frame-mounted): 19–30 Vac
120 Vac nominal: 98–132 Vac
230 Vac nominal: 196–264 Vac
Power consumption
Tracer AH541 controller: 21 VA
Optional operator display: 7 VA
Operating environment
Temperature
Without display: From –40°F to 158°F
(–40°C to 70°C)
With display: From 32°F to 122°F
(0°C to 50°C)
Humidity: 10–90% non-condensing
Storage environment
Temperature
Without display: From –40°F to 185°F
(–40°C to 85°C)
With display: From –13°F to 149°F
(–25°C to 65°C)
Humidity: 5–95% non-condensing
Enclosure
Enclosure compliant with National
Electrical Manufacturers Association
(NEMA) type-1 standards
Weight
With NEMA-1 enclosure: 15 lb (7 kg)
Frame-mounted: 2 lb (1 kg)
Dimensions
Tracer AH541 NEMA-1 enclosure
16 ½ in. × 14 ¾ in. × 5 ½ in.
(418 mm × 373 mm × 140 mm)
Frame-mounted Tracer AH541
10 ¼ in. × 8 in. × 3 ½ in.
(260 mm × 203 mm × 89 mm)
Minimum clearances
NEMA-1 enclosure
12 in. (30 cm) top, bottom, and right
24 in. (60 cm) left
36 in. (90 cm) front
Frame-mounted
½ in. (1.3 cm) top, right, and front
6 in. (15 cm) left (for I/O wiring)
3 in. (8 cm) bottom (for communications wiring)
Mounting
NEMA-1 enclosure: wall-mounted with
10 (5 mm) screws
Frame-mounted: #8 (4 mm) screws
Operator interface
Video graphics adapter (VGA) backlit
liquid crystal display (LCD) with touch
screen; 4.5 in. × 3.4 in. (115 mm × 86 mm) viewable area; resolution of 320 ×
240 pixels
Time clock
Included with operator display; crystal
controlled, super-capacitor backed
Battery
Not required—backed by super capacitor
for seven days under normal operating
conditions; all other programs backed by
non-volatile memory
Agency listings/compliance
UL and C-UL
UL 916 Energy Management
CUL C22.2 No. 205-M1985 Signal
Devices
FCC approved: CFR 47, Part 15,
Subpart A, Class A
CE Conformance
Emissions
EN55022 Class B
EN61000-3-2
EN61000-3-3
Immunity
EN50082-2 Industrial
Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
Trane
A business of American Standard Companies
www.trane.com
For more information, contact your local Trane office or e-mail us at
[email protected] firealarmresources
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