EngA CenCon Bedienungsanleitung
IOM68 June 2019
Technical Manual
Manual Revision 1.08
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These instructions
are intended as an aid to qualified, licensed installers and
service personnel for proper installation, adjustment and operation of this unit.
Read and understand these instructions thoroughly before attempting installation or
operation. Failure to follow these instructions may result in improper installation,
adjustment, service or maintenance possibly resulting in fire, electrical shock,
carbon monoxide poisoning, explosion, personal injury or property damage.
www.engineeredair.com
CenCon
2
INTRODUCTION
This technical manual is intended for technicians and factory personnel already familiar with the operation of
Engineered Air equipment, control strategies and combustion setup.
The CenCon and expansion modules have been certified by Intertek (ETL) for use with Engineered Air
appliances only, evaluated to CSA 22.2 No. 24 Temperature Indicating and Regulating Equipment and UL873
Standard for Safety Temperature Indicating and Regulating Equipment.
If any errors or omissions are noted please contact the nearest Engineered Air Technical Service Department.
To ensure warranty is honored, only qualified personnel should be employed for service or troubleshooting. If
further information is required please contact the nearest Engineered Air sales office.
Copyright
This document and the information in it are the property of Engineered Air, and may not be used or reproduced
in whole or in part without written permission. Engineered Air reserves the right to revise this publication at
any time, and to make changes to its content without obligation to notify any person of such revision or
change.
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CONTACT INFORMATION
Canadian Head Office and Factory
1401 Hastings Cres. SE
Calgary, Alberta, Canada
T2G 4C8
PH: (403) 287 2590
FX: 1 888 364 2727
Email: service@engineeredair.com
USA Head Office and Factory
32050 W. 83rd Street
De Soto, Kansas, USA
66018
PH: (913) 583 3181
FX: (913) 583 1406
Canadian Eastern Factory
1175 Twinney Drive
Newmarket, Ontario, Canada
L3Y 5V7
PH: (905) 898 1114
FX: (905) 898 7244
WARNINGS, CAUTIONS AND
NOTICES
Warning, Caution and Notice statements are used
throughout this manual to emphasize important and
critical information. You must read these
statements to help ensure safety and to prevent
damage.
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WARNING:
Indicates a hazardous situation that, if not
avoided, could result in death or serious injury.
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CAUTION:
Indicates a hazardous situation that, if not
avoided, could result in minor or moderate injury.
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NOTICE:
Indicates information considered important but not
hazard related.
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WARNING:
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death. Read the installation,
operation and maintenance instructions
thoroughly before installing or servicing this
equipment.
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WARNING:
This unit is connected to high voltages. Electrical
shock could occur if instructions are not
followed. This equipment contains moving parts
that can start unexpectedly. Injury or death
could occur if instructions are not followed. All
work must be performed by a qualified
technician. Always disconnect and lock out
power before servicing. DO NOT bypass any
interlock or safety switches under any
circumstances.
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CAUTION:
All the remote wiring must be complete and
functional before attempting to start the
appliance.
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CAUTION:
It is important that the service technician
understands the CenCon is a configurable
controller. Its operation on one appliance of
equipment may not mimic another.
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CAUTION:
The CenCon is specifically programmed for this
specific appliance. Do not replace with another
controller without confirming its program
suitability with Engineered Air.
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TABLE OF CONTENTS
GENERAL OVERVIEW...................................... 6
HARDWARE INFORMATION ............................ 6
COMPUTER CONNECTION ............................. 7
KEYPAD ................................................. 10
DISPLAY SCREENS ..................................... 11
HOME SCREEN ....................................... 11
HEATING ............................................. 11
COOLING ............................................. 11
ECONOMIZER ........................................ 12
CENCON ANALOG I/O .............................. 12
CENCON DIGITAL I/O .............................. 12
HEATING ANALOG I/O ............................. 12
HEATING DIGITAL I/O ............................. 12
COMMUNICATION ................................... 13
SETTINGS ............................................ 13
ALARMS .............................................. 13
TERMINAL DESCRIPTION ............................. 14
OPERATION ............................................... 15
MODE SELECTION ..................................... 15
OCCUPIED / UNOCCUPIED ........................ 15
FAN CONTROL ......................................... 15
VARIABLE AIR VOLUME ............................ 15
AIR PROVING SWITCH .............................. 15
WARMUP/COOLDOWN ............................. 15
DAMPER CONTROL .................................... 16
MAKE UP AIR ........................................ 16
DAMPER END SWITCH .............................. 16
AMBIENT COMPENSATION ......................... 16
ECONOMIZER ........................................ 16
MINIMUM POSITION................................. 17
CALIFORNIA BUILDING ENERGY EFFICIENCY -
TITLE 24 ............................................. 17
HIGH AMBIENT LOCKOUT ......................... 17
INDOOR AIR QUALITY ...... Error! Bookmark not
defined.
LOW LIMIT............................................. 17
HEATING ............................................... 17
GAS FIRED HEATING............................... 18
COOLING .............................................. 18
GENERAL TIMING ..................................... 18
TEMPERATURE CONTROL ........................... 19
ROOM OR RETURN THERMOSTAT ............... 19
REMOTE SETPOINT ................................ 19
BMS SETPOINT ..................................... 19
ALARM DESCRIPTION ................................ 20
ALARM RESET ......................................... 20
EXPANSION MODULES (XM) ............................ 23
WIRING CONCERNS .................................. 21
MODULE GROUNDING ............................. 21
COMMUNICATION WIRING ........................ 21
COMMUNICATION WIRE GROUNDING ........... 22
J-XM ....................................................... 23
BASIC OPERATION .................................... 24
TERMINAL DESCRIPTION ............................ 25
J-XM / CD-XM TIMING ............................... 26
J-XM COMBUSTION SETUP .......................... 27
GAS ACTUATOR CALIBRATION ................... 27
COMBUSTION OFFSETS ........................... 27
ALARM DESCRIPTION ................................ 29
G-XM ...................................................... 30
BASIC OPERATION .................................... 30
G-XM TIMING.......................................... 31
TERMINAL DESCRIPTION ............................ 31
G-XM COMBUSTION SETUP ......................... 32
GAS AND AIR ACTUATOR CALIBRATION ....... 32
COMBUSTION OFFSETS ........................... 32
ALARM DESCRIPTION ................................ 34
M-XM ...................................................... 35
BASIC OPERATION .................................... 35
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M-XM / P-XM TIMING ................................. 35
TERMINAL DESCRIPTION ............................. 36
M-XM BURNER SETUP ................................. 37
MAXITROL VALVE ................................... 37
GAS ACTUATOR CALIBRATION .................... 37
ALARM DESCRIPTION ................................. 38
C-XM ....................................................... 39
BASIC OPERATION .................................... 39
C-XM TIMING ........................................... 39
TERMINAL DESCRIPTION ............................. 40
STAGED COMPRESSORS ............................ 41
AMBIENT CONDENSER FANS....................... 41
LOW AMBIENT LOCKOUT .......................... 41
H-XM ....................................................... 42
BASIC OPERATION .................................... 42
TERMINAL DESCRIPTION ............................. 42
HIGH AMBIENT LOCKOUT ......................... 43
S-XM ........................................................ 44
BASIC OPERATION .................................... 44
S-XM TIMING ........................................... 44
OPERATION NOTES ................................... 45
TERMINAL DESCRIPTION ............................. 45
ALARM DESCRIPTION ................................. 46
ER-XM ...................................................... 47
BASIC OPERATION .................................... 47
TERMINAL DESCRIPTION ............................. 48
ALARM DESCRIPTION ................................. 48
CD-XM ..................................................... 49
BASIC OPERATION .................................... 49
P-XM....................................................... 50
BASIC OPERATION .................................... 50
Appendix A - Thermistor Output Table ............. 52
Appendix B - Maxitrol Valve Adjustments .......... 53
Appendix C – Startup Checks ......................... 54
Appendix D - Service Issues ........................... 54
CenCon Specific ...................................... 54
READ AND SAVE FEATURES ...................... 54
COMMUNICATION ALARM ......................... 54
ERRATIC BEHAVIOR ............................... 54
HARD RESET BUTTON ............................. 54
Miscellaneous......................................... 55
COMBUSTION ANALYSIS .......................... 55
POOR PILOT SENSING ............................. 55
REGULATOR RESPONSE ........................... 55
WATER AND ICE FROM COMBUSTION ........... 55
MANIFOLD PRESSURE ............................. 55
CUSTOMER INSTALLED SENSORS ................ 55
SPEED SENSOR – DJ................................ 56
TOP LOADING ...................................... 56
AIR BALANCING .................................... 56
Appendix E – DJ/DG Fuel Curve Development ..... 57
Combustion Record - DJ ............................ 58
Combustion Record - DG ........................... 59
Combustion Record – HE ............................ 60
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GENERAL OVERVIEW
The Engineered Air CenCon controller is the primary operational component for the majority of custom
manufactured Engineered Air HVAC equipment. Expansion modules (-XM) may be added to extend the
operational capabilities to gas fired heating, cooling, humidification and energy recovery systems.
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Notice:
There is approximately a 1 minute delay before operation can commence on initial power up. The CenCon has
to load parameters and configurations prior to operation. The time varies depending on the complexity of the
equipment it is controlling.
HARDWARE INFORMATION
Control Voltage
24Vac 60Hz
Apparent
Power
Ratings
Digital Output Rating
120V 10A
CenCon
10 VA
Digital Input
24Vac
1
J
-
XM, G
-
XM, M
-
XM
30 VA
Analog Output
0
-
10Vdc
C
-
XM
20 VA
Analog Input
0
-
10Vdc and 4
-
20mA
2
,3
CD
-
XM
5 VA
Analog In
Impedance
7.5k
Ω
P
-
XM
5 VA
Temperature Rating
-
40
–
150°F (65°C)
Temperature Sensor
10k Type 2 NTC
1 Digital input connection to the CenCon or any of the expansion modules cannot use Mosfet solid
state switches. Input switching must be mechanical.
2 If using 4-20mA, add a 500Ω resistor across the input terminals.
3 Analog inputs will trigger 10Vdc ‘high’ if using 24Vac input and a series Diode (1N400x).
Power indication light.
Slow Blink.
Internal Modbus network
light.
Fast Blink.
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COMPUTER CONNECTION
Direct connection may be made to a Windows 10 OS computer or tablet. To gain access to the CenCon testing
interface connect using a Cat.5 Ethernet cable to the CenCon, near the top right of the controller. Tablets
may require a USB to Ethernet adapter. Any Windows based web browser should work.
To set the correct IP address, click the Start button, then Settings, then Network and Internet. Then, click
Ethernet (on the left side), then Change Adapter Options. Click the Ethernet icon and a status page should
open. Press Properties, then Ethernet, then select Internet Protocol Version, and then Properties.
Set a static IP address on the computer with the following settings:
Click OK to accept, and then open a web browser and type in the following address to gain access to the
testing interface:
192.168.0.10:8080/webvisu.htm
To simplify connections, make this a bookmark in the web browser for future connections.
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INTERFACE SCREENS
The layout of the display screen depends on the age and version of the CenCon.
The initial release interface display screen example:
A second release, similar to the following has been released. Note the tabs along the top bar:
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The third release screens have been improved for visibility and tablet use. Note the tabs along the top for
more screens. The background is black. This image is grey for printing purposes.
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KEYPAD
The 9 button keypad has been configured to easily manipulate any user variables available for modification.
Typically, this would include the temperature setpoint(s) and outside air minimum position.
The home button displays the main page.
Pressing the alarm button changes the
display to the alarm page.
The left and right double arrow keys
increment the display to the next page.
Use the left and right arrows to navigate
the location of the cursor within each
page.
Press the enter key once the cursor is
located at the variable to be changed.
The up and down arrows change the
value of the indicated variable.*
*Changing a
variable is
‘live’
. Pressing enter is
not required to set the value.
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