Bard FUSION-TEC HR58APB, FUSION-TEC HR58APA, FUSION-TEC HR36APA, FUSION-TEC HR36APB Service Instructions Manual

SERVICE INSTRUCTIONS

FUSION-TEC™

WALL-MOUNT

AIR CONDITIONER

Models:

HR58APA

HR58APB

Part of the Bard Free Cooling Unit System

NOTE: LV1000 Controller is required for operation when

multiple HR58AP* units are used.

Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com

Manual : 2100-670
Supersedes: NEW
Date: 6-2-17

Page 1 of 32

CONTENTS

Using the TEC-EYETM ...........................................6

TEC-EYE Hand-Held Diagnostic Tool .................. 6

TEC-EYE Menu Structure ............................ 7

TEC-EYE

Status Screen ............................................ 7

Quick Menu ............................................... 7

Setpoints ............................................ 7

Information ......................................... 8

Data (Alarm) Log .................................. 8

Menu Screens and Password Levels ....... 8

Acronyms ..................................... 7

Operation ..............................................................9

Unit On/Off ...................................................... 9

Alarm Adjustment ............................................. 9

Acknowledging/Clearing Alarms ................... 9

Stand Alone Mode ............................................ 9

Temperature/Humidity Control ........................... 9

Temperature/Humidity Control Components .. 9

Return Air Temperature Sensor .............. 9

Return Air Temperature Alarm ....... 10

Temperature/Humidity Control Operation .... 10

Cooling ............................................. 10

Heating ............................................. 11

Staging ............................................. 11

Dehumidification ............................... 12

Electronic Expansion Valve (EEV) ..................... 12

EEV Components ...................................... 12

Electronic Expansion Valve .................. 12

Low Pressure Transducer..................... 12

Suction Pressure Alarm ................ 12

Suction Temperature Sensor ................ 12

Suction Temperature Alarm ........... 12

EEV Operation ......................................... 13

EEV Superheat Control ....................... 13

EEV Instructions for Vacuum,

Reclaim, Charge Unit ......................... 13

System Pressures ............................... 14

Additional EEV Alarms .............................. 14

Low Superheat Alarm ......................... 14

Indoor Airflow ................................................. 14

Indoor Airflow Components ........................ 14

Blower .............................................. 14

Blower Status Alarm ..................... 15

Differential Airflow Switch ................... 15

Filters ............................................... 16

Dirty Filter Switch .............................. 16

Dirty Filter Alarm ......................... 17

Filter Indicator Light .......................... 17

Freezestat ......................................... 17

Freezestat Alarm .......................... 17

Indoor Airflow Operation ........................... 18

Blower Speed Control ......................... 18

Additional Indoor Airflow Alarms ................ 18

Supply Air Temperature Alarm ............. 18

Condenser Fan ............................................... 18

Condenser Fan Components ...................... 18

Condenser Fan ................................... 18

High Pressure Transducer ................... 19

High Pressure Transducer Alarm .... 19

Discharge Temperature Sensor ............ 19

Condenser Fan Operation .......................... 19

Condenser Fan Speed Control .............. 19

High Pressure Control ......................... 20

Low Pressure Control .......................... 20

Additional Condenser Fan Alarms .............. 20

Dirty Condenser Coil Alarm ................. 20

Compressor .................................................... 21

Compressor Components ........................... 21

Compressor ....................................... 21

Compressor Control Module (CCM) ....... 21

High Pressure Safety Switch ............... 21

Refrigerant High Pressure Alarm.... 21

Phase Monitor ................................... 22

Compressor Operation ............................... 22

Additional Compressor Alarms ................... 22

Refrigerant Low Pressure Alarm ........... 22

Economizer .................................................... 23

Economizer Components ........................... 23

Actuator ............................................ 23

Dust Sensor ....................................... 23

Dust Sensor Failure Alarm ............ 24

Dust Limit Alarm ......................... 24

Damper Blade .................................... 24

Damper Switch .................................. 24

Damper Failed to Open Alarm ....... 25

Damper Failed to Close Alarm ....... 25

Outdoor Temperature and Humidity

Combination Sensor ........................... 25

Outdoor Temperature Sensor

Failure Alarm .............................. 26

Outdoor Humidity Sensor

Failure Alarm .............................. 26

Supply Temperature Sensor ................. 26

Supply Temperature Sensor

Failure Alarm .............................. 26

High Supply Air Temperature

Alarm ......................................... 26

Low Supply Air Temperature

Alarm ......................................... 27

Economizer Operation ............................... 27

Emergency Ventilation Mode ............................ 29

Model/Serial Number Configuration .................. 29

Electric Heat Option ....................................... 29

Electric Heat Components ......................... 29

Electric Heating Element .................... 29

Thermal Overload ............................... 29

Electric Heat Operation ............................. 29

Bard Guard Anti-Theft System Option ............... 29

Smoke Detector Option ................................... 29

Inverter Option ............................................... 29

Manual 2100-670
Page 2 of 32

Refrigerant Information ..................................30

General ......................................................... 30

Topping Off System Charge .............................. 30

Safety Practices ............................................. 30

Important Installer Note .................................. 30

R410-A Refrigerant Charge ............................. 30

Pressure Service Ports .................................... 31

Maintenance .......................................................32

Standard Maintenance Procedures ................... 32

Bard Guard Anti-Theft System Option ............... 32

FIGURES AND TABLES

Figure 1 TEC-EYE Display and Interface ................ 6

Figure 2 TEC-EYE Connection to Unit Control ........ 6

Figure 3 Quick Menu Icons ................................... 7

Figure 4 Cool and Heat Setpoints .......................... 7

Figure 5 Clearing All Alarms ................................. 9

Figure 6 Adjusting Return Air Sensor ................... 10

Figure 7 Cooling w/Economizer ........................... 10

Figure 8 Viewing Unit Stages .............................. 11

Figure 9 Cooling w/No Economizer ...................... 11

Figure 10 Heating ...............................................11

Figure 11 Adjusting Low Pressure Sensor Values ....12

Figure 12 Adjusting Suction Temperature Sensor

Values .................................................13

Figure 13 Overriding EEV Output ..........................13

Figure 14 Electronic Expansion Valve (EEV) and

Service Tool .........................................13

Figure 15 Putting Blower Output into Override

Mode ...................................................14

Figure 16 Adjusting Air Flow Alarm Delay ..............15

Figure 17

Figure 18 Verifying Differential Airflow Status ........16

Figure 19 Dirty Filter Switch/Filter Indicator Light ..16

Figure 20 Verifying Freeze Switch Status ...............17

Figure 21 Adjusting Freezestat Alarm Delay ...........18

Figure 22 Verifying Condenser Fan Output .............18

Figure 23 Fan Blade Setting ................................. 18

Figure 24 Adjusting High Pressure Input ...............19

Figure 25 Adjusting Discharge Temperature Input...19

Figure 26 Pressure Control ................................... 20

Figure 27 Adjusting Dirty Condenser Alarm

Settings ...............................................21

Figure 28 Adjusting Compressor Delays .................22

Figure 29 Adjusting Low Pressure Alarm Settings ... 23

Figure 30 Damper Override ..................................23

Figure 31 Dust Sensor .........................................24

Figure 32 Adjusting Dust Sensor Alarm Setpoint ....24

Figure 33 Damper Switch ..................................... 24

Figure 34 Adjusting Damper Alarm Delay ............... 25

Figure 35 Outdoor Air Sensor ...............................25

Figure 36 Outdoor Humidity Sensor ......................26

Figure 37 Supply Air Sensor ................................. 26

Figure 38 Adjusting Supply Air Temperature

Differential ..........................................27

Figure 39 Economizer Setup ................................27

Figure 40 Economizer Setup – Enthalpy Control ..... 28

Figure 41 Economizer Setup – TempHum Control ...28

Table 1 Unit Status Message ...............................7

Table 2 LV1000/TEC-EYE Passwords (Defaults) .....8

Table 3 Blower Speeds .....................................14

Table 4 Rated Airflow .......................................15

Table 5 Indoor Blower Performance ....................15

Table 6 Maximum ESP of Operation:

Electric Heat Only ................................15

Table 7 Filter Switch Pressure Settings ..............17

Table 8 Condenser Fan Speeds ..........................20

Table 9 Economizer Default Settings ..................28

Table 10 Cooling Pressures .................................31

Dirty Filter Switch/Blower Status Switch

..15

Manual 2100-670
Page 3 of 32

GENERAL INFORMATION

Free Cooling Unit System

This Bard Free Cooling Unit System is composed of
FUSION-TEC wall-mounted air conditioners matched
with an LV1000 lead/lag controller. The wall mounts
are specifically engineered for telecom/motor control
center rooms.

NOTE: The LV1000 lead/lag controller and FUSION-

TEC wall-mount units are designed specifically
to work together. The controller cannot run
other Bard models or other brands of systems,
nor can other controllers run the FUSION-TEC
wall-mount units. They are a complete system,
and must be used together.

Wall-Mount Air Conditioner Units

The FUSION-TEC units operate on VAC power.
units will supply 100% of rated cooling airflow in free
cooling mode with ability to exhaust the same amount
through the unit itself without any additional relief
openings in the shelter.

Each of these units are fully charged with refrigerant
and have optional auxiliary heat.

The

General

The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians.

The refrigerant system is completely assembled and
charged. All internal wiring is complete.

The unit is designed for use without duct work. Flanges
are provided for transition from unit to wall grilles.

These instructions explain the recommended method
to install the air cooled self-contained unit and the
electrical wiring connections to the unit.

These instructions and any instructions packaged with
any separate equipment required to make up the entire
air conditioning system should be carefully read before
beginning the installation. Note particularly any tags
and/or labels attached to the equipment.

While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation is
made. See Additional Publications for information
on codes and standards.

Sizing of systems for proposed installation should be
based on heat loss and heat gain calculations made
according to methods of Air Conditioning Contractors of
America (ACCA). The supply flange should be installed
in accordance with the Standards of the National

Fire Protection Association for the Installation of Air

Conditioning and Ventilating Systems of Other Than
Residence Type, NFPA No. 90A, and Residence Type
Warm Air Heating and Air Conditioning Systems, NFPA
No. 90B. Where local regulations are at a variance with

instructions, installer should adhere to local codes.

Shipping Damage

Upon receipt of equipment, the cartons should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact
the last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.

These units must remain in upright position at all
times.

Additional Publications

These publications can help when installing the
furnace. They can usually be found at the local library
or purchased directly from the publisher. Be sure to
consult the current edition of each standard.

National Electrical Code ...................... ANSI/NFPA 70

Standard for the Installation of Air Conditioning

and Ventilating Systems ...................ANSI/NFPA 90A

Standard for Warm Air Heating

and Air Conditioning Systems ............ANSI/NFPA 90B

Load Calculation for Residential Winter

and Summer Air Conditioning ............. ACCA Manual J

For more information, contact these publishers:

Air Conditioning Contractors of America (ACCA)
1712 New Hampshire Ave. N.W.
Washington, DC 20009
Telephone: [phone] Fax: [phone]

American National Standards Institute (ANSI)
11 West Street, 13th Floor
New York, NY 10036
Telephone: [phone] Fax: [phone]

American Society of Heating, Refrigeration and Air
Conditioning Engineers, Inc. (ASHRAE)

1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Telephone: [phone] Fax: [phone]

National Fire Protection Association (NFPA)
Batterymarch Park
P. O. Box 9101
Quincy, MA 02269-9901
Telephone: [phone] Fax: [phone]

Manual 2100-670
Page 4 of 32

ANSI Z535.5 Definitions:

DANGER: Indicate[s] a hazardous situation which, if

not avoided, will result in death or serious injury. The
signal word “DANGER” is to be limited to the most
extreme situations. DANGER [signs] should not be used
for property damage hazards unless personal injury risk
appropriate to these levels is also involved.

WARNING: Indicate[s] a hazardous situation which,
if not avoided, could result in death or serious injury.
WARNING [signs] should not be used for property
damage hazards unless personal injury risk appropriate
to this level is also involved.

CAUTION: Indicate[s] a hazardous situation which, if
not avoided, could result in minor or moderate injury.
CAUTION [signs] without a safety alert symbol may be
used to alert against unsafe practices that can result in
property damage only.

NOTICE: [this header is] preferred to address practices
not related to personal injury. The safety alert symbol
shall not be used with this signal word. As an
alternative to “NOTICE” the word “CAUTION” without
the safety alert symbol may be used to indicate a
message not related to personal injury.

!

WARNING

Electrical shock hazard.

Have a properly trained individual perform
these tasks.

Failure to do so could result in electric shock
or death.

!

WARNING

Fire hazard.

Maintain minimum 1/4" clearance between the

supply ange and combustible materials.

Failure to do so could result in re causing
damage, injury or death.

!

WARNING

Heavy item hazard.

Use more than one person to handle unit.

Failure to do so could result in unit damage or
serious injury.

!

CAUTION

Cut hazard.

Wear gloves to avoid contact with sharp
edges.

Failure to do so could result in personal injury.

Manual 2100-670
Page 5 of 32

USING THE TEC-EYE

TEC-EYE (Bard P/N 8301-059) Display and Interface (Status Screen Shown)

TM

FIGURE 1

ALARM KEY

MENU KEY

ESCAPE KEY

ALARM KEY

Allows viewing of active alarms
Silences audible alarms
Resets active alarms

MENU KEY

Allows entry to Main Menu

ESCAPE KEY

Returns to previous menu level
Cancels a changed entry

TEC-EYE Hand-Held Diagnostic Tool

The microprocessor control used in the FUSION-TEC
wall-mount air conditioners allows for complete control
and monitoring through the use of the provided TEC­EYE hand-held monitor. This comprehensive service
tool utilizes the latest in state-of-the-art technology
including a large, easy-to-read backlit LCD graphic
display.

The menu driven interface provides users the ability
to scroll through two menu levels: Quick Menu and
Main Menu. The menus permit the user to easily view,
control and configure the unit.

The controller is completely programmed at the factory;
the default setpoints and their ranges are easily viewed
and adjusted from the TEC-EYE display. The program
and operating parameters are permanently stored
on FLASH-MEMORY in case of power failure. The
controller is designed to manage temperature levels to
a user-defined setpoint via control output signals to the
wall mount air conditioning system.

The TEC-EYE connects to the wall-mount unit control
board via an RJ11 modular phone connector as shown
in Figure 2.

UP KEY

ENTER KEY

DOWN KEY

UP KEY

Steps to next screen in the display menu
Changes (increases) the value of a modifiable field

ENTER KEY

Accepts current value of a modifiable field
Advances cursor

DOWN KEY

Steps back to previous screen in the display menu
Changes (decreases) the value of a modifiable field

FIGURE 2

TEC-EYE Connection to Unit Control

Modular Phone Connector for
TEC-EYE Hand-Held Diagnostic Tool

NOTE: Screenshots shown in this manual reflect

default settings (when applicable).

When not being used, the TEC-EYE hand-held
diagnostic tool should be stored inside or near the
LV1000 controller. Do not let the TEC-EYE leave the
shelter.

Manual 2100-670
Page 6 of 32

TEC-EYE Menu Structure

Quick Menu
Setpoints
Information
Alarm Log
Main Menu
System Configuration
Advanced System Configuration
I/O Configuration
On/Off
Alarm Logs
Settings
Logout

In addition to the menu structure above, there are also
Status and Alarm screens.

TEC-EYE Acronyms

MAT – Mixed air temperature
RAT – Return air temperature
OAT – Outdoor air temperature
OAH – Outdoor air humidity
Blower – Indoor blower status
Damper – Free cooling damper position status
CL1 – Compressor stage 1 status
CL2 – Compressor stage 2 status
H1 – Heater stage 1 status
H2 – Heater stage 2 status
ODP – Calculated outdoor dew point
FC – Free cooling status
RN – Component run time in minutes in last hour
ST – Number of start requests in last hour

NOTE: Digital refers to On/Off whereas analog is a

variable input.

Status Screen

The Status screen is the default start-up screen and
also the return screen after 5 minutes of no activity.
The screen can be accessed any time by pressing the
ESCAPE key repeatedly.

The wall-mount unit address is displayed in the upper
right corner on the Status screen (see Figure 1). The
Status screen also shows the current date, time, return
air temperature, mixed air temperature, outdoor air
temperature, outdoor humidity and outdoor dew point
conditions. Blower, damper and unit status are also
displayed. See Table 1 for wall-mount unit status
messages.

The Quick Menu is accessible from the Status screen.
Setpoints, Information and Data (Alarm) Log are
available through the Quick Menu. Pressing the UP or
DOWN keys while on the Status screen will change the
Quick Menu icon displayed (see Figure 3). Press the
ENTER key when the desired icon is displayed.

TABLE 1

Unit Status Messages

Message Description

Orphan Stby

Power Loss

Freecooling Unit is actively economizing

Cooling Unit is actively mechanical cooling

Heating Unit is actively heating

Dehum Mode Unit is actively dehumidifying

Off by Alarm

Off by Keyboard

Off by LV

Manual Mode

Test Mode System is performing a run test

Emergency Vent

Emergency Off

Unit is on and in orphan mode with

no calls for heating or cooling

Unit is operating under power loss

conditions (inverter model)

Unit has major fault preventing

operation

Unit has been turned off by

local user

Unit has been turned off by the

supervisory controller

There is an active override on the

system

Unit has active hydrogen alarm

and is actively exhausting the air to

outside

Unit has active smoke alarm and

Emergency Shutdown is active

FIGURE 3

Quick Menu Icons

Data Log Unit Information

Setpoints

Quick Menu

Setpoints

From this screen, the unit heating and cooling
setpoints can be changed.

The LV1000 setpoints will determine the cooling and
heating setpoints when communicating with the wall-
mount units. The unit cooling and heating setpoints
will determine the cooling and heating setpoints when
in stand alone mode.

If at any time the unit(s) loses communication with the
LV1000 controller, the unit(s) will go into stand alone
mode.

Manual 2100-670
Page 7 of 32

To verify or change the wall-mount unit cooling and
heating setpoints in stand alone mode:

1. Connect the TEC-EYE diagnostic tool to the control
board located in the unit.

2. From the Status screen, press UP or DOWN key
until Quick Menu displays Setpoints icon. Press
ENTER key.

3. Press ENTER key to scroll to the selected choice
(see Figure 48).

4. Press UP or DOWN key on desired value until value
displays correctly.

5. Press ENTER key to save and scroll to next
parameter.

6. Press ESCAPE key until Main Menu screen is
displayed.

FIGURE 4

Cool and Heat Setpoints

Information

These screens show unit demand, wall unit status,
serial/model number, hours, run hours, averages and
program version information.

Data (Alarm) Log

The alarm log screens show a log of each alarm. There
will be a log for when alarm occurred and if the alarm
auto clears, it will show when the alarm cleared.

TABLE 2

LV1000/TEC-EYE Passwords (Defaults)

User 2000

Technician 1313

Engineer 9254

Use UP or DOWN keys and ENTER key to enter password

Menu Screens and Password Levels

A System Config: A1-A10 User

B Adv Sys Config: B1-B4 Technician

C I-O Config: C1-C18 Technician

D On/Off: User

E Alarm Logs: User

F Settings:

Date/Time: Technician

Language: User

Network Config: Technician

Serial Ports: Technician

Initialization:

Clear Logs: User

System Default: Engineer

Restart: User

Parameter Config: Engineer

Alarm Export: User

G Logout: Used to log out of the current password

level. Entering back into the menu requires
password.

NOTE: Screenshots shown in this manual reflect

default settings (when applicable).

Manual 2100-670
Page 8 of 32

OPERATION

Unit On/Off

The wall unit can be turned on and off from the TEC­EYE. Turning the unit off with the following instructions
will disable heating and cooling operation but may not
disable the blower. The blower may continue to run
if the unit or the LV1000 have the continuous blower
option enabled.

NOTE: Blower will run if the unit is in stand alone

mode.

To turn the unit on or off:

1. Press MENU key to go to the Main Menu screen.

2. Press UP or DOWN keys and ENTER key to enter

USER password 2000.

3. Press UP or DOWN keys to scroll to On/Off; press

ENTER key.

4. Press UP or DOWN keys to change value from On

to Off or from Off to On.

5. Press ESCAPE key several times to return to Main

Menu screen.

The wall unit may also be turned off by certain alarms
such as the smoke alarm input on the wall unit board
or the return air temperature sensor failure when not
connected to the LV1000.

Alarm Adjustment

Acknowledging/Clearing Alarms

Alarm conditions activate a red LED indicator that
backlights the ALARM function key. As an option, an
alarm condition may also be enunciated by an audible
alarm signal. An alarm is acknowledged by pressing the
ALARM key. This calls up alarm display screen(s) that
provide a text message detailing the alarm condition(s).
After an alarm condition is corrected, the alarm can be
cleared by pressing the ALARM key for 3 seconds.

To clear all alarms, navigate to the end of the alarm list
to the screen shown in Figure 5.

Stand Alone Mode

With the AC breakers turned on, each FUSION-TEC
wall-mount unit has the capability to run without the
LV1000 controller attached—this feature is called
stand alone or orphan mode. This keeps the shelter
between 60°F and 79°F (factory default settings) by
the use of the factory-installed return air sensor in
each wall-mount unit. In stand-alone mode, the wall
unit uses a continuous blower setting to circulate room
air into the return air inlet and uses the return air
temperature sensor to control room temperature.

The wall-mount unit can be turned on and off with
the TEC-EYE hand-held diagnostic tool. When ON is
chosen, the wall unit will heat or cool. The blower will
continue to run when OFF is chosen. If the wall unit is
turned OFF by the TEC-EYE while in stand alone mode
and power is interrupted, when repowered the blower
will not run until the wall unit is turned back ON by the
TEC-EYE (see Unit On/Off).

To change default setpoints, refer to Setpoints on page

7.

During installation, the ability to run in stand alone
mode allows deactivation of one of the existing, older
wall-mount units, while keeping the shelter cool
with the other unit still operating. Once the first of
the Bard FUSION-TEC wall-mount units is installed,
orphan mode can be enabled early in the installation—
keeping the climate inside the shelter stable and
the installers comfortable while the remainder of the
older equipment is removed and the remaining Bard
FUSION-TEC wall-mount units and LV1000 controller
are installed.

Additionally, should any or all of the FUSION-TEC
wall-mount units lose communication with the LV1000
controller (such as during maintenance), they will
continue to serve the shelter’s needs until a repair can
be made.

Temperature/Humidity Control

FIGURE 5

Clearing All Alarms

Temperature/Humidity Control Components

Return Air Temperature Sensor

The unit is equipped with a return air temperature
sensor to monitor the space temperature when the unit
is in stand alone mode. The return air sensor is located
in the upper part of the return opening in such a way
that it is exposed to the entering airstream. An alarm
signal will be sent to the LV controller if the return air
temperature sensor is disconnected. The temperature is
measured with a 10k ohm NTC thermistor.

This sensor can be verified and adjusted by:

1. Press MENU key to go to the Main Menu screen.

Manual 2100-670
Page 9 of 32

2. Press UP or DOWN keys and ENTER key to enter
TECHNICIAN password 1313.

3. Press UP or DOWN keys to scroll to I/O Config;
press ENTER key.

4. Press UP or DOWN keys to scroll to Return Air
Sensor (C5); press ENTER key.

5. Verify the measurement displayed on screen is
accurate (see Figure 6).

6. If the measurement needs to be adjusted, apply an
offset value by pressing ENTER to scroll to Offset.

7. Press UP or DOWN keys to adjust the offset.

8. The update will not take effect until the cursor is
moved out of the Offset parameter.

9. Once adjusted, press the ESCAPE key several
times to return to Main Menu screen.

FIGURE 6

Adjusting Return Air Sensor

Return Air Temperature Alarm

When the return air temperature sensor value is out of
range (-41.0 to 303.0°F), the controller will generate
a sensor failure alarm to indicate the sensor is not
working properly.

This alarm is fixed and cannot be adjusted.

Temperature/Humidity Control Operation

The unit utilizes a PID control loop for space control.
This control will compare the space temperature to
the space setpoint. Based on how far away from the
setpoint the temperature is, the loop will output a
cooling or heating capacity number between 0 and
100%. The unit will then take all of the available
cooling methods and distribute them evenly across the
0-100% range. The stages are then brought on as the
heating or cooling capacity reaches the percentage that
brings the stages on or off. There are separate setpoints
for cooling and heating.

To change or view the unit setpoint:

1. From the Status screen, press UP or DOWN key
until Quick Menu displays Setpoints icon ( ).
Press ENTER key.

2. Press ENTER key to scroll to Cool Setpoint or Heat
Setpoint (see Figure 4 on page 8).

3. Press UP or DOWN keys to change the value to
desired heating and/or cooling setpoint.

Cooling

The unit is equipped with 1 stage of freecooling and 2
stages of mechanical cooling (compressor and solenoid)
for a total of 3 cooling stages (see Figure 7).

FIGURE 7

Cooling w/Economizer

Freecooling

Compressor Stage 1

Compressor Stage 2

-10% 0%

Deadband(sometimes called a neutral zone or dead zone) is an interval of a signal domain or band where no action occurs

Manual 2100-670
Page 10 of 32

10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Off

Deadband On

110% 120%