EngA CRD C-TRAC3 User manual

A
Nov 10
INSTALLATION AND OPERATION
MANUAL
FOR
CRD
C-TRAC3 REMOTE DISPLAY
AFTER
NOVEMBER 2010
UNIT MODEL NO. _________________
UNIT SERIAL NO. _________________
SERVICED BY: ___________________
TEL. NO: ________________________
CANADIAN
HEAD OFFICE
AND FACTORY
USA
HEAD OFFICE
AND FACTORY
CANADIAN
EASTERN FACTORY
1401 HASTINGS CRES.
SE
CALGARY, ALBERTA
T2G 4C8
Ph: [phone]
Fx: 888-364-2727
32050 W. 83rd STREET
DESOTO, KANSAS
66018
Ph: [phone]
Fx: [phone]
1175 TWINNEY DRIVE
NEWMARKET, ONTARIO
L3Y 5V7
Ph: [phone]
Fx: [phone]
www.engineeredair.com
SALES OFFICES ACROSS CANADA AND USA
Retain instructions with unit and maintain in a legible condition.
Please give model number and serial number when contacting
factory for information and/or parts.

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CRD
If any errors or omissions are noted please contact Engineered Air – Calgary Service at (403)
287-4775 or Fax [phone].
To ensure warranty is honored, only a qualified HVAC service person, who has received
training on the CRD and C-TRAC3, should be employed for service and troubleshooting. If
further information is required please contact the nearest Engineered Air office.
Under no conditions (except for temporary copying) should the unit function be removed
from the unit. There are two copies provided with the unit. One is in an envelope for copying,
then return it to the unit or store in a safe place. The other is attached to the control panel
door and should never be removed.
This manual is intended to be used in conjunction with the C-TRAC3 Operation, Installation
and Maintenance manual, and the unit function sheet.

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Table of Contents
INTRODUCTION .........................................................................................................4
CRD WIRING .............................................................................................................4
WIRING REMOTE HAND HELD DISPLAY .........................................................................4
CRD OPERATION........................................................................................................6
CLOCK / SCHEDULER..................................................................................................6
UNIT MODE...............................................................................................................8
SCHEDULER ..............................................................................................................8
UNIT OPERATION.......................................................................................................8
Discharge Temperature and Setpoint..........................................................................9
Ambient, Damper and VFD Information.......................................................................9
Additional Inputs And Outputs ...................................................................................9
Alarm Status...........................................................................................................9
Customer Password..................................................................................................9
POINTS LIST ...........................................................................................................11

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INTRODUCTION
The Engineered Air CRD remote display panel is designed to monitor and control
C-TRAC3 equipment operations via Modbus communication.
CRD Command Capabilities
-Quickly identify the current operation of the equipment.
-Ability to scroll to the page associated with specific unit operations.
-Alarm identification and associated alarm status.
-Password protection for manual adjustments.
-Adjustment of manual discharge air setpoints, minimum outside air, unit on/off and time
clock schedules.
-Change status from Celsius or Fahrenheit.
-Save setpoints and time schedules to flash memory.
The CRD panel can be ordered with the following control features:
Feature 1: Display only
Feature 2: Control unit on/off, adjust discharge setpoints, damper minimum position &
internal time clock
Feature 3: Remote hand held display c/w options #1 and #2
CRD WIRING
The RS-485 Modbus communication cable from the CRD to the C-TRAC3 is 24awg shielded
twisted pair (STP) with a shunt capacitance of 16pF per foot and 100 ohm characteristic
impedance. Category 5 cable can be used as defined by the EIA/TIA/ANSI 568 specification.
An additional set of 24VAC wires is required to power the remote panel. Refer to the table
below for minimum wire size and maximum distance to the remote panel.
Distance <100ft. <150ft. <200ft. <300ft. <350ft. <450ft.
AWG # #20 #20 #20 #18 #18 #16
WIRING REMOTE HAND HELD DISPLAY
Phone cable (RJ45) connection has a maximum distance of 150ft. For greater distances (up
to 600ft), use 2 twisted pair awg/24 shielded cable.

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CRD OPERATION
To move between pages press either DN or UP .
To escape from modifying an entry press ESC .
To make any adjustments you must first enter the password, press ENT then UP or DN
to change the password #, press ENT and continue until the new password is entered.
Press ENT when complete.
To modify a manual value, move to the page that allows manual changes to
the setpoint. Press ENT and then press DN to decrease and UP to increase the
value. When the appropriate value has been set, press ENT to save.
To ensure the value is not lost in the event of a power failure or equipment servicing, be sure
to save it. Go to Save Setpoints then ENT and UP for On, then press ENT to save.
To restart the equipment from the CRD go to Enable Unit and press ENT then
press UP for On , then press ENT to restart the equipment.
CLOCK / SCHEDULER
If the time clock/scheduler is enable press ENT on the clock/scheduler to go to the
time and date page. Press the ENT to change the dates and times. Press the DN
to go to the scheduler page. The scheduler # can have up to 7 different schedules with
different on/off times and days of the week. Press ENT to advance to the time on,
time off and days enabled as per the schedule #.

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FIELD WIRING DIAGRAM

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PAGE DESCRIPTION
The status information that can be viewed on each page is dependent on the type of
equipment being operated and the current status of the equipment. For example, a make-up
air unit will not have a minimum position.
The CRD can be enabled to allow for the adjustment of setpoints, such as the discharge air
temperatures, or the outside air damper minimum position, turn the equipment on or off,
and set the occupied or unoccupied schedule.
Every CRD is preprogrammed with the following information. The LCD will display this
information on display pages and each page is designed to provide the correct state of
operations.
Unit Modes
Scheduler
Unit Operation
Discharge Temperature and Setpoints
Ambient and Damper Information
Additional Inputs And Outputs
Alarm Status
Customer Password
UNIT MODE
Describes the current operating modes that are enabled, fan status, as well as the program
number.
SCHEDULER
If the equipment is operated by a time clock schedule this page allows the user to turn the
equipment back on for a predetermined time.
UNIT OPERATION
Describes the units mode of operation.
Enable Unit On/Off
If enabled it allows the user to enable or disable equipment operation (on/off).
Heating
Shows the actual heating signal output (%) from the C-TRAC3 to the heating device, as well
as indicating the return signal (on or off) to confirm heating is operational.

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Cooling
Describes the number of cooling stages as a percentage. For example, if the equipment has
3 compressors the output will indicate 33, 66 and 100%, as well as indicating the return
signal (on or off) to confirm cooling is operational.
Economizer
Indicates the actual C-TRAC3 economizer output to the dampers (%) as well as indicating the
return signal (on or off) to confirm dampers are operational.
Deviations may occur between setpoint and actual output. Refer to the C-TRAC3 manual for
clarification.
Discharge Temperature and Setpoint
Indicates the discharge air temperature and setpoint. The secondary sensor and setpoint
may be used for two applications, multizone cold deck & dehumidification pre-cool. Setpoint
changes may be made here, but will not be saved unless saved to flash memory.
Ambient, Damper and VFD Information
Indicates the ambient sensor reading and the economizer minimum position of the outside air
dampers, setpoint and actual. Setpoint changes may be made here, but will not be saved
unless saved to flash memory. Also notes the variable frequency drive feedback signal, if
equipped.
Additional Inputs And Outputs
The CRD may be configured to allow for additional inputs and outputs, such as a clogged
filter switch or room temperature.
Alarm Status
Alarm indication is activated by either of 2 events. These events are low limit, or freeze
protection failure, and the other is a heating failure.
If any additional sensors are used for status and the sensor exceeds the predetermined
resistance range, an alarm is indicated. Also high and low limits can be added for alarm
status. The CRD digital inputs may be used to provide an alarm from an open or closed
contact.
Customer Password
If enabled the customer may enter a unique password to start/stop the equipment and make
adjustments to the discharge air setpoints and the damper minimum position.

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POINTS LIST
Unit Mode
FAN : ON OCCUPIED MODE
: OFF
: ON UNOCCUPIED MODE
OCCUPIED MODE : ENABLED/DISABLED
COOLING : ENABLED/DISABLED
ECONOMIZER : ENABLED/DISABLED
HEATING : ENABLED/DISABLED
UNOCCUPIED MODE : ENABLED DISABLED
Scheduler
If Enabled For Time Clock
CLOCK OVERRIDE: ON/OFF
OVERRIDE TIMER: 1,2 OR 3 HRS
Unit Operation
UNIT MODE : NO MODE
: HEATING MODE
: ECONOMIZER MODE
: COOLING MODE
ENABLE UNIT : ON / OFF
UNIT STATUS : OCCUPIED
: OFF
: UNOCCUPIED
HEATING : ON / OFF %
: L/O HI AMBIENT
COOLING : ON /OFF %
: L/O LOW AMBIENT
ECONOMIZER : ON/OFF %
: L/O HI AMBIENT
Discharge Temperature
And Setpoints
DISCHARGE TEMP : F OR C
DISCHAGRE STPT : F OR C
ADJ DISCH STPT : WRITE F/C READ F/C
SECONDARY DT TEMP : F OR C
ADJ SEC DT TEMP : WRITE F/C READ F/C
Ambient and
Damper Information
AMBIENT SENSOR : F OR C
ECON MIN POSITION : %
ADJ ECON MIN POS : %
VFD FEEDBACK : %
VFD L/O COOLING : NO / YES
SAVE SETPOINTS : OFF / ON
Additional
Inputs Outputs

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Alarm Status
LOW LIMIT LOCKOUT : OK /ALARM
HEAT FAILURE LOCKOUT : OK / ALARM
PREPURGE ALARM : OK / ALARM
FLAME FAILURE : OK / ALARM
HE OR LMK FAILURE : OK / ALARM
Alarm Status DISCHARGE AIR :OK / ALARM
SECONDARY DT : OK /ALARM
AMBIENT : OK / ALARM
Insert Customer
Password (PW1)
0000