k1econ economizers - HVAC-Talk

k1econ economizers - HVAC-Talk
ECONOMIZERS
Litho U.S.A.
2014
507379-01
8/2014
Supersedes 6/2014
K1ECON ECONOMIZERS
INSTALLATION INSTRUCTIONS FOR ECONOMIZERS AND OUTDOOR AIR HOODS USED
WITH KG/KC/KH 024, 030, 036, 048, 060, 072, 090 UNITS
Note - Disregard shipping and packing list and installation
sections when dampers are factory-installed.
Shipping and Packing List
Package 1 of 1 contains:
1- Economizer damper assemblyA
1- GEDB (gravity exhaust/barometric relief damper)
assembly
1- Exhaust hood kit containing:
1-Exhaust hood topA
2-Hood sidesC
1-GED sealC
1- Outdoor air hood kit containing:
1-Outdoor air hood topA
2-Hood sidesD
1- Mist eliminator filterD
2- Mist eliminator filter bracketsD
1- Bag assembly containing:
#10-32 X 1/2 Thread-forming screws
#10-16 X 5/8 Self-drilling screws
#8-32 X 1/2 Thread-forming screws
Mixed air sensor (R1)
Mixed air sensor bracket (10U56 & 57 only)
2-Wire ties (90W61 & 62 only)
AAlready in place when economizer is factory-installed.
BOptional GED already installed in field-installed economizer
CShipped under the exhaust air cover when economizer
is factory-installed.
DShipped in the blower section when economizer is
factory-installed.
WARNING
Improper installation, adjustment, alteration, ser­
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser­
vice must be performed by a qualified installer, ser­
vice agency or the gas supplier
Application
Part No.
Unit Application
90W61 - 609258-03
KG/KC 024-060
KH 024-048
10U56 - 609258-07 High Performance
KG/KC 024-060
KH 024-048
The K1ECON economizer is used with KG/KC/KH units
in downflow and horizontal air discharge applications.
Economizer dampers will modulate to maintain 55_F
(13_C) supply air when outdoor air is suitable. The mixed
air temperature sensor (R1) measures the supply air
sensible temperature.
The mixed air sensor is provided in field-installed kits and
installed according to these instructions. The mixed air
sensor is factory-installed when the unit is equipped with
an economizer.
Standard Economizer
The OA sensible control is the default economizer
control. The OA thermostat, S175, is provided in this kit.
See table 1 for outdoor and return air (OA and RA) sensor
options. Refer to instructions provided with sensors for
installation.
TABLE 1
Order Of Installation:
STANDARD ECONOMIZERS
Return air cover (horizontal airflow)
Dampers modulate to maintain
Sensors
55°F mixed air (R1) when:
Economizer
Mixed air sensor (R1)
OA temperature (S175) is lower than
Single OA Sensible
free cooling setpoint.
Remove GED (horizontal airflow and PEF options)
Optional OA/RA sensors
OA temperature and humidity (A7) is
Single OA Enthalpy
lower than free cooling setpoint.
Power exhaust fans
GED in lower hood (horizontal and PEF options)
OA temperature and humidity (A7) is
Differential Enthalpy
lower than RA temperature and hu­
RA Transition (horizontal airflow)
- 1 in OA & 1 in RA
midity (A62).
RA duct (horizontal airflow)
CO2 sensed (A63) is higher than
Lower outdoor air hood
IAQ Sensor
CO2 setpoint.
Upper outdoor air hood
08/14
507379-01
Page 1
*2P0814*
*P507379-01*
High Performance (Low Leak) Economizer
The high performance economizer is equipped with a
W7220 control module A6. The default OA temperature
sensor or high limit sensor (RT26) is a CEC approved,
California Title 24 fixed dry bulb device (provided in this
kit). See table 2 for outdoor and return air (OA and RA)
sensor options. Refer to manufacturer's instructions
provided for more details.
TABLE 2
HIGH PERFORMANCE ECONOMIZERS
Dampers modulate to maintain
55°F mixed air (R1) when:
Sensors
Single OA Sensible
DEFAULT - approved
for CA Title24
Single OA Enthalpy
Not approved for CA
Title 24
Differential Enthalpy
- 1 in OA & 1 in RA
Not approved for CA
Title 24
IAQ Sensor
Install Economizer - Downflow
1. Open unit end panel. See figure 1.
2. Install damper assembly through end of unit. Fit
opening in bottom of damper assembly over the
return air opening. See figure 2.
Install Mixed Air Sensor (R1)
Standard Economizer
Sensor is factory-installed on units equipped with a
factory-installed economizer.
OA temperature (RT26) is lower
than free cooling setpoint.
1- Disconnect all power to unit and open filter access
panel. See figure 1.
OA temperature and humidity (A7) is
lower than free cooling setpoint.
2- Locate mixed air sensor wires connected to the T/T1
terminals on the A6 economizer control.
OA temperature and humidity (A7) is
lower than RA temperature and hu­
midity (A62).
3- Install mixed air sensor, provided in kit, on indoor coil
bracket. Secure with screw as shown in figure 3.
CO2 sensed (A63) is higher than
CO2 setpoint.
4- Locate the plastic conduit on top of the filter rack.
Route the mixed air sensor wires through the conduit
to the mixed air sensor. See figure 3.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
5- Connect wires to terminals on mixed air sensor. See
figures 3 and 5. Sensor is not polarity sensitive.
IAQ SENSING (A63)
High Performance Economizer
An IAQ sensor is used when demand control ventilation
(DCV) is specified. Damper minimum position can be set
lower than traditional minimum air requirements resulting
in cost savings. The IAQ sensor allows the A6 to open
dampers to traditional ventilation requirements as room
occupancy (CO2) increases.
1- Disconnect all power to unit and open filter access
panel. See figure 1.
2- Locate orange mixed air sensor wires marked
MAT­1/MAT­2 in wire bundle. Cut wire ties to
separate sensor wiring from bundle.
For proper operation, the IAQ sensor must provide a
2-10VDC, 100 ohm impedance signal. Connect sensor
leads to AQ and AQ1 terminals on the A6 economizer
control located in the filter section.
3- Install mixed air sensor R1, provided in kit, on supply
air blower housing as shown in figure 4.
UNIT
4- Locate the plastic conduit on top of the filter rack.
Route the mixed air sensor harness through the
conduit to the mixed air sensor. See figure 3.
5- Connect MAT harness to mixed air sensor (R1).
UNIT END
PANEL
FILTER ACCESS
PANEL
FIGURE 1
Page 2
ECONOMIZER INSTALLATION
OUTDOOR AIR SENSOR LOCATED ON OTHER SIDE OF PANEL.
OUTDOOR AIR SENSOR OPTIONS INCLUDE:
S175 Outdoor Air Thermostat
(Standard Economizers with Sensible Sensor)
RT26 Outdoor Air Temperature Sensor
(High Performance Economizers with
Sensible Sensors)
A7 Outdoor Air Enthalpy Sensor (Standard or
High Performance Economizer with Single
Enthalpy Sensors)
ECONOMIZER
(STANDARD SHOWN)
Note - Take care not to damage the
A6 economizer control module and
wiring during installation. Remove
the corner mullion if necessary.
B7
DAMPER
MOTOR
UNIT
A6
ECONOMIZER
CONTROL
MIXED AIR SENSOR
WIRING IN THIS
BUNDLE
POWER EXHAUST WIRES
ONLY CONNECTED WHEN
UNIT IS EQUIPPED WITH
POWER EXHAUST
RETURN AIR
OPENING
FIGURE 2
Wiring
INSTALL MIXED AIR SENSOR (R1)
STANDARD ECONOMIZER
WIRE ROUTING
CONDUIT
1- Locate 15-pin J3 economizer jack harness
hanging on left side of filter compartment. J3 is
located in the same area on both standard and high
performance economizers. See figure 3.
WIRE TIES
FILTER
SECTION
2- Disconnect P3 jumper plug from J3 and retain
jumper plug for future troubleshooting. Connect
15-pin P4 economizer plug on A6 economizer
control harness to J3 economizer jack. See figure 3.
J3
3- Connect any optional sensors as shown in figure
5 or 6.
P4
4- Bundle power exhaust wires and secure away from
other components. If optional power exhaust is
installed, wire according to instructions provided with
power exhaust.
A6
ECONOMIZER
CONTROL
5- Affix D1 economizer wiring diagram section to inside
of compressor access panel. Position diagram to the
right of “C” control wiring diagram section.
R1 MIXED
AIR SENSOR
FIGURE 3
Page 3
INSTALL MIXED AIR SENSOR (R1)
HIGH PERFORMANCE ECONOMIZER
R1
MIXED AIR
SENSOR
PROVIDED
R1
MIXED AIR
SENSOR
PROVIDED
MOUNTING
BRACKET
BLOWER
HOUSING
FIGURE 4
Page 4
WIRE CONNECTIONS - STANDARD ECONOMIZERS
Field-Installed
A6
ECONOMIZER
CONTROL
SINGLE SENSING
N1
N
2V
EXH
P1
P
T1
R1 MIXED AIR
SENSOR
(PROVIDED)
A63 IAQ
SENSOR
(OPTION)
T
7
2V
8
AQ1
AQ1
DCV
AQ
Discard J104 harness
provided in optional
A7 sensor kit.
OPE
S175 (PROVIDED)
OR A7 SENSOR
(OPTION)
+
S
AQ
SO+
SO
SR+
SR
2
Fre
Coo
B
A
DIFFERENTIAL SENSING
A6
ECONOMIZER
CONTROL
N1
N
2V
EXH
P1
P
T1
R1 MIXED AIR
SENSOR
(PROVIDED)
A63 IAQ
SENSOR
(OPTION)
T
7
2V
8
AQ1
AQ
Discard J104 harness
provided in optional
A7 sensor kit.
S175 (PROVIDED)
OR A7 SENSOR
(OPTION)
A62 DIFFERENTIAL
ENTHALPY SENSOR
(OPTION)
OPE
+
S
A6-SR+
P105 J105
Harnesses Provided In
Optional Sensor Kit
FIGURE 5
Page 5
A6-SR
AQ1
DCV
AQ
SO+
SO
SR+
SR
2
Fre
Coo
B
A
WIRE CONNECTIONS - HIGH PERFORMANCE ECONOMIZERS
Field-Installed
SINGLE AND DIFFERENTIAL SENSIBLE SENSING
R1 MIXED AIR
SENSOR
(PROVIDED)
Factory-Installed
MAT1
MAT
MAT
OAT
OAT
SBUS
SBUS
SBUS
SBUS
SBUS
SBUS
IAQ2-10
IAQCOM
IAQ24V+
ACT2-10
ACTCOM
ACT24V+
MAT2
Set DIP switch on
RT27 to appropriate
setting “RA”.
RT26 OUTDOOR AIR
SENSIBLE SENSOR
(PROVIDED)
P104 J104
RT27 RA DIFFER­
ENTIAL SENSIBLE
SENSOR (OPTION)
P105 J105
Harness Provided In
Optional Sensor Kit
A63 IAQ
SENSOR
(OPTION)
8
7
Factory-Installed
SINGLE ENTHALPY SENSING
Factory-Installed
R1 MIXED AIR
SENSOR PROVIDED
MAT1
MAT2
1- Replace RT26 with A7.
2- Move wiring on A6 control­
ler as shown. Discard har­
ness provided in optional
sensor kit.
A6
ECONOMIZER
CONTROL
A7 OUTDOOR AIR
ENTHALPY SENSOR
(OPTION)
P104 J104
Move factoryinstalled wires
from OAT to SBUS
3- Set DIP switch on A7 to ap­
propriate setting “OA”.
A63 IAQ
SENSOR
(OPTION)
8
7
Factory-Installed
A6
ECONOMIZER
CONTROL
MAT
MAT
OAT
OAT
SBUS
SBUS
SBUS
SBUS
SBUS
SBUS
IAQ2-10
IAQCOM
IAQ24V+
ACT2-10
ACTCOM
ACT24V+
DIFFERENTIAL ENTHALPY SENSING
1- Set DIP switch on A7 to ap­
propriate setting “OA”. Set
DIP switch on A62 to “RA”.
R1 MIXED AIR
Factory-Installed RT26 SENSOR PROVIDED
1- Two
optional
enthalpy
sensor kits are required. Re­
A7 OUTDOOR AIR
place RT26 with A7 from first
ENTHALPY SENSOR
optional sensor kit.
(OPTION)
2- Move wiring on controller A6
as shown. Discard harness
provided in first optional
sensor kit.
A62 RETURN AIR
3- Install
second
optional ENTHALPY SENSOR
sensor (A62) kit using har­
(OPTION)
ness provided in second kit.
Factory-Installed A7 A63 IAQ
8
1- One
optional
enthalpy
SENSOR
sensor kit (A62) is required.
7
(OPTION)
Install optional temperature
& humidity sensor kit using
harness provided in kit.
FactoryInstalled
MAT1
MAT2
P104 J104
Move factoryinstalled wires
from OAT to SBUS
P105 J105
Harness Provided In
Optional Sensor Kit
Factory-Installed
FIGURE 6
Page 6
A6
ECONOMIZER
CONTROL
MAT
MAT
OAT
OAT
SBUS
SBUS
SBUS
SBUS
SBUS
SBUS
IAQ2-10
IAQCOM
IAQ24V+
ACT2-10
ACTCOM
ACT24V+
GED (Barometric Relief Dampers)
NOTE - GED
factory-installed.
is
optional
when
economizer
Outdoor Air Hoods
is
Remove GED from the economizer (when present) and
install in the exhaust air hood when:
SOptional power exhaust fans are installed
SEconomizer is installed in horizontal air flow
Factory-Installed Economizers Only Both hood tops and pivot brackets are secured to unit.
The lower hood is provided and installed only when the
economizer is equipped with an optional GED. Hood
parts are located under the exhaust panel and in the
blower section. Lift hood tops and assemble hoods as
described for field-installed economizers.
1- Remove the GED from the economizer. See figure 7.
2- Install the GED in the exhaust or lower hood as shown
in figure 9.
1- Make sure all sensors and outdoor air section
accessories are installed before installing hoods.
REMOVE GED
2- Install pivot brackets and seal on unit as shown in
figure 8.
3- Assemble hoods as shown in figure 9. Slide top of
hoods into the ends of pivot brackets. Install
birdscreen bracket after birdscreens are in place.
4- Install hoods on unit as shown in figure 10.
5- Caulk ends of pivot bracket to seal watertight.
FIGURE 7
INSTALL PIVOTING BRACKETS AND GED SEAL
(FIELD-INSTALLED ECONOMIZERS ONLY 024-060 SHOWN)
SIDE VIEW
(024-060)
UNIT TOP
REMOVE AND REUSE
SCREWS (2) TO
INSTALL BRACKET
PIVOT
BRACKET
MULLION
INSTALL
PIVOT
BRACKETS
SIDE VIEW
(072 & 090)
UNIT TOP
FILLER PANEL
(FACTORYINSTALLED)
INSTALL
GED SEAL
PIVOT
BRACKET
POWER EXHAUST SHOWN;
GRAVITY EXHAUST LOCATED
HERE WHEN UNIT IS NOT
EQUIPPED WITH PED
MAKE SURE SEAL
IS INSTALLED
BEFORE HOOD
FIGURE 8
Page 7
MULLION
ASSEMBLE HOODS
OUTDOOR AIR HOOD
SECURE TOP BRACKET
WITH SCREW AFTER
BIRDSCREEN IS IN PLACE
BIRDSCREEN
INSTALL LOWER BRACKET
BEFORE INSTALLING
BIRDSCREEN
EXHAUST OR LOWER HOOD
LOWER HOOD INSTALLED
ONLY WHEN ECONOMIZER IS
EQUIPPED WITH A GED
GED INSTALLED IN HOODS WHEN POWER
EXHAUST IS PRESENT. GED INSTALLED IN
POWER EXHAUST LOCATION WHEN UNIT
IS NOT EQUIPPED WITH POWER EXHAUST.
SEE FIGURE 7.
FIGURE 9
Page 8
INSTALL HOODS
(024-060 SHOWN)
SIDE VIEW
(024-060)
UNIT TOP
CAULK
PIVOT
BRACKET
MULLION
HOOD
CAULK
SIDE VIEW
(072 & 090)
INTAKE
UNIT TOP
LOWER HOOD INSTALLED
ONLY WHEN ECONOMIZER IS
EQUIPPED WITH A GED
FILLER PANEL
(FACTORYINSTALLED)
MULLION
PIVOT
BRACKET
HOOD
EXHAUST
FIGURE 10
Install Economizer - Horizontal
HORIZONTAL AIRFLOW
A field fabricated return air duct transition and duct inlet
must be installed in horizontal applications.
BACK
OF UNIT
1- Remove unit end panel. See figure 11.
2- Install the downflow return air cover in horizontal
airflow applications. Secure with #10 sheet metal
screws provided in kit. See figure 11.
SUPPLY
AIR
3- Make sure the horizontal return air cover on the back
side of the unit remains in place. The opening is used
when an economizer is not installed. See figure 12.
DO NOT ATTACH
RETURN AIR
DUCTWORK
HERE
RETURN
AIR
4- Install the economizer and R1 mixed air sensor and
connect wiring as shown in appropriately named
sections of this manual.
FIGURE 12
UNIT
5- Install the field-fabricated return air duct transition
and duct inlet on the unit end. See figure 13. Support
the transition and duct inlet as needed.
UNIT END
PANEL
6- Install the lower (exhaust) hood on the return air duct.
The barometric relief dampers should already be
installed in the hood as shown in the “Barometric
Relief Damper” section of this manual.
DOWNFLOW
RETURN AIR COVER
FIGURE 11
7- Install the upper hood on the unit as shown in
appropriate section of this manual.
Page 9
TYPICAL HORIZONTAL APPLICATION
ECONOMIZER
DAMPERS
Barometric Relief Hood
and Dampers
TOP VIEW
RETURN
AIR DUCT
RETURN AIR
DUCT TRANSITION
SUPPLY
AIR DUCT
RETURN
AIR INLET
SUPPLY
AIR OUTLET
OUTDOOR
AIR HOOD
BACK VIEW
HORIZONTAL
SUPPLY AIR
OPENING
EXHAUST HOOD
This opening not
used in
Horizontal
Applications
with Economizer
HORIZONTAL
RETURN
AIR
OPENING
RETURN AIR
DUCT TRANSITION
EXHAUST
AIR
RETURN AIR
DUCT INLET
FIGURE 13
Economizer Control (A6) - Standard
Economizer
A6 ECONOMIZER CONTROL
2V
LEDs
A steady green Free Cool LED indicates that outdoor air
is suitable for free cooling. A steady green DCV LED
indicates that the IAQ reading is higher than setpoint
requiring more fresh air. See figure 14.
EXH
Open
FREE COOLING SETPOINT
NOTE - The following conditions assume unit is operating
during occupied time period.
2V
2V
Free cooling will be enabled when outdoor air
temperature or enthalpy are lower than the free cooling
setpoint. The free cooling setpoint for sensible
temperature sensors is 55°F. Table 3 shows the free
cooling setpoints for enthalpy sensors. Use the
recommended setpoint and adjust as necessary.
Page 10
Min
Pos
DCV
Max
10V
DAMPER
MINIMUM
POSITION
IAQ MAXIMUM
POSITION
(set higher than
minimum position)
DCV LED
DCV
Single Temperature or Enthalpy Sensing:
The economizer control (A6) setpoint may be adjusted
when an enthalpy (A7) sensor is used to determine
outdoor air suitability, See figure 14.
EXH
Set
10V
DCV
Set
10V
IAQ SETPOINT
Free
Cool
B
C
A
D
FREE COOL LED
FREE COOLING SETPOINT;
A=Completely counterclockwise
D=Completely clockwise
FIGURE 14
For example: At setting A (table 3), free cooling will be
enabled when outdoor air enthalpy is lower than 73°F
and 50% RH. If indoor air is too warm or humid, lower the
setpoint to B. At setting B, free cooling will be enabled at
70°F and 50% RH.
Differential Sensing:
Two sensors can be used to compare outdoor air to return
air. When outdoor air is cooler than return air, outdoor air
is suitable for free cooling. Adjust the free cooling setpoint
to “D” in this application.
When return air is cooler than outdoor air, the damper will
modulate to the minimum position.
INITIAL SETUP
Factory-Installed Economizer The A6 economizer control is pre­programmed and a
limited number of parameters need to be set during
the initial setup in the field. See ‘Setup and
Configuration ­ Factory-Installed Economizer’ section.
Field-Installed Economizer A default program must be modified for proper
operation in each application. This is done during the
initial setup procedure. See ‘Setup and Configuration ­
Field-Installed Economizer’ section.
TABLE 3
ENTHALPY FREE COOLING SETPOINTS
Control Setting
Enthalpy Setpoint At 50% RH
A*
73° F (23° C)
B
70° F (21° C)
C
67° F (19° C)
D
63° F (17° C)
A6 ECONOMIZER CONTROL KEYPAD
MOVE FORWARD
THROUGH MENUS
SELECT AND
CONFIRM
CHANGES
DCV SET AND DCV MAX SETTINGS
The DCV SET potentiometer is factory-set at
approximately 50% of the potentiometer range. Using
a standard 1-2000ppm CO2 sensor, dampers will start
to open when the IAQ sensor reads approximately
1000ppm. Adjust the DCV SET potentiometer to the
approximate setting specified by the controls
contractor. Refer to figure 14.
The DCV MAX potentiometer is factory-set at
approximately 50% of the potentiometer range or
6VDC. Dampers will open approximately half way when
CO2 rises above setpoint. Adjust the DCV MAX
potentiometer to the approximate setting specified by
the controls contractor. Refer to figure 14.
FIGURE 15
USING THE KEYPAD
Use the keypad as follows:
- Navigate to the desired menu.
- Press the
button (enter) to display the first item in
the currently displayed menu.
- Use the
and
buttons to scroll to the desired
parameter.
- Press the
enter button (enter) to display the value
of the currently displayed item.
button to increase (change) the
- Press the
displayed parameter value.a
- Press the
button to decrease (change) the
displayed parameter value.a
- Press the
enter button (enter) to accept the
displayed value and store it in non-volatile RAM.
- CHANGE STORED displays.
button (enter) to return to the current
- Press the
menu parameter.
NOTE - DCV Max must be set higher than economizer
minimum position setting for proper demand control
ventilation.
Economizer Control (A6) - High
Performance Economizer
NOTE - The A6 economizer control will be in the “setup”
mode for the first sixty minutes after powered. If a sensor
for outdoor air or SBUS device (sensor, actuator) is
disconnected during the set up mode, the A6 will not
alarm that failure. The R1 mixed air sensor is a system
“critical” sensor; if the mixed air sensor is removed during
the set up mode, the A6 will alarm. After sixty minutes the
A6 will change to operation mode and all components
removed or failed will alarm in the operation mode.
MOVE BACKWARD
THROUGH MENUS
MENU UP / EXIT
button (MenuUp/Exit) to return to the
- Press the
previous menu.
aWhen
values are displayed, pressing and holding the
or
button causes the display to automatically
increment.
Page 11
MENU STRUCTURE
Differential Sensing (Optional) ­
The menus in display order are:
Two sensors can be used to compare outdoor air to return
air. When outdoor air is cooler than return air, outdoor air
is suitable for free cooling. When return air is cooler than
outdoor air, the damper will modulate to the minimum
position.
•STATUS
•SETPOINTS
•SYSTEM SETUP
•ADVANCED SETUP
•CHECKOUT
•ALARMS
SETUP AND CONFIGURATION FACTORY-INSTALLED ECONOMIZER
For a complete list of parameters refer to the Honeywell
installation manual provided in this kit.
IMPORTANT - Menu parameters will be different
depending on each configuration. For example: if a DCV
(CO2 ) sensor is not used, none of the DCV parameters
will appear and only MIN POS will display. If a CO2 sensor
is used, the DCV SET, VENTMIN and VENTMAX will
appear.
FREE COOLING SETPOINT
Program the following parameters into the controller.
Navigate to the specific menus to make the changes
required.
IMPORTANT - During setup, the economizer control is
live at all times.
The setup process uses a hierarchical menu structure.
and
arrow buttons to move forward and
Press the
button to
backward through the menus and press the
select and confirm setup item changes.
1- In the SYSTEM SETUP Menu
Single OA Sensible Sensing (Default) ­
INSTALL
FAN CFM
The default free cooling setpoint or high limit setpoint is
63_F. This means that the outdoor air is suitable for free
cooling at 62_F and below and not suitable at 64_F and
above. This setpoint is adjustable.
For California Title 24 compliance, adjust the free cooling
setpoint based on:
AUX1 OUT
2- In the SETPOINTS Menu
MIN POS
-The climate zone where the unit is installed. See
table 4.
-The setpoint requirement published by the California
Energy Commission. See Section 140.4 Prescriptive Requirements for Space Conditioning
Systems of the 2013 Building Energy Efficiency
Standards.
NOTE - Values in the referenced standard will supersede
values listed in table 4.
TABLE 4
FREE COOLING SETPOINT - SINGLE SENSIBLE
Climate Zone
Setpoint
1, 3, 5, 11-16
75_F
2, 4, 10
73_F
6, 8, 9
71_F
7
69_F
(MM/DD/YY) enter installation date
(
) enter rooftop unit indoor
blower CFM
(NONE) enter SYS if controller
is wired for remote
alarm monitoring.
(
VDC) refer to minimum position
setting section for
details.
SETUP AND CONFIGURATION FIELD-INSTALLED ECONOMIZER
Program the following parameters into the controller.
Navigate to the specific menus to make the changes
required.
IMPORTANT - During setup, the economizer control is
live at all times.
The setup process uses a hierarchical menu structure.
and
arrow buttons to move forward and
Press the
button to
backward through the menus and press the
select and confirm setup item changes.
1- In the SYSTEM SETUP Menu
To adjust the setpoint, navigate to the “SETPOINTS”
menu and change the “DRYBLB SET” parameter
accordingly.
INSTALL
EQUIPMENT
AUX2 IN
FAN SPEED
FAN CFM
Single OA Enthalpy Sensing (Optional) -
AUX1 OUT
The controller uses enthalpy boundary “curves” for
economizing when used with an enthalpy sensor. Refer
to the Honeywell installation instruction for details.
OCC
Page 12
(MM/DD/YY) enter installation date
(CONV)
(HEAT W1)
(1SPEED)
(
) enter indoor blower (CFM) of
rooftop unit.
(NONE) change to SYS if A6 controller
is wired for remote
alarm monitoring.
(INPUT)
2- In the ADVANCED SETUP Menu
MA LO SET
FREEZE POS
STG3 DLY
SD DMPR POS
Damper Minimum Position Setting Both Standard and High Performance
Economizers
(45ºF)
(CLOSE)
(2HRS)
(CLOSED)
3- In the SETPOINTS Menu
MA SET
LO T LOCK
MIN POS
(55ºF)
(32ºF)
(
VDC) adjust VDC value until
desired fresh air
setpoint is reached.
DEMAND CONTROL VENTILATION (DCV)
When a 2­10VDC CO2 sensor is wired to the controller
(leads provided), the DCV SET, VENTMIN, and
VENTMAX parameters will appear under “SETPOINTS“
menu. Navigate to the “SETPOINTS“ menu to adjust
setpoints as desired. Refer to the Honeywell manual
provided for more details.
ALARM MONITORING
The controller is equipped with a 24V output signal that
can be configured for remote alarm monitoring.
In the “SYSTEM SETUP“ menu change the “AUX1 OUT”
setting to “SYS“. Refer to figure 16 for wiring connections
provided.
A6 CONTROL HIGH PERFORMANCE TERMINALS
SYSTEM ALARM,
ERV, OR EXHAUST
FAN 2 OUTPUT
MAT
MAT
OAT
OAT
SBUS
SBUS
SBUS
SBUS
SBUS
SBUS
IAQ2-10
IAQCOM
IAQ24V+
ACT2-10
ACTCOM
ACT24V+
A6
ECONOMIZER
CONTROL
NOTE - 24 volts must be provided at unit TB1 terminals
R and OC to enable economizer operation (allowing
minimum fresh air). Typically a separately ordered
thermostat or energy management system with an
occupied/unoccupied output is connected between
TB1 R and OC terminals. The thermostat will provide 24
volts to the A6 economizer control during the occupied
time period to enable economizer minimum position. If
a device is not used to enable the economizer, install a
jumper wire between TB1 terminals R and OC to
maintain minimum position continuously.
Make wire connections to TB1 terminals R and OC as
shown in literature provided with thermostat or energy
management system.
1- Set thermostat to occupied mode if the feature is
available. Make sure jumper is in place between TB1
terminals R and OCP if using a thermostat which
does not have the feature.
2- Turn on the blower using the thermostat or a jumper
between TB1 terminals R and G.
3- Standard Economizers Rotate MIN POS SET potentiometer to approximate
desired fresh air percentage.
High Performance Economizers Navigate to the “SETPOINTS” menu and select “MIN
POS”. Adjust value (2-10VDC) to the approximate
desired fresh air percentage.
AUX2-I
OCC
E-GND
EXH1
AUX1-0
3.0 VDC ­ 12% Open Damper
3.5 VDC ­ 18% Open Damper
4.0 VDC ­ 25% Open Damper
Y2-I
Y2-O
Y1-I
Y1-0
C
R
4.5 VDC ­ 31% Open Damper
5.0 VDC ­ 37% Open Damper
5.5 VDC ­ 43% Open Damper
FIGURE 16
6.0 VDC ­ 50% Open Damper
NOTE - Damper minimum position can be set lower than
traditional minimum air requirements when an IAQ
sensor is specified.
Page 13
4- Measure outdoor air temperature. Mark the point on
the bottom line of chart 1 and label the point “A” (40_F,
4_C shown).
5- Measure return air temperature. Mark that point on
the top line of chart 1 and label the point “B” (74_F,
23_C shown).
10- Standard Economizers If fresh air percentage is less than desired, adjust MIN
POS SET potentiometer clockwise (further open). If
fresh air percentage is more than desired, adjust MIN
POS SET potentiometer counterclockwise (less
open). Repeat steps 4 through 9 until calculation
reads desired fresh air percentage.
6- Measure mixed air (outdoor and return air)
temperature. Mark that point on the top line of chart 1
and label point “C” (70_F, 21_C shown).
High Performance Economizers If fresh air percentage is less than desired, use the A6
keypad to adjust “MIN POS” values higher (further
open). If fresh air percentage is more than desired,
adjust “MIN POS” values lower (less open). Repeat
steps 4 through 9 until calculation reads desired fresh
air percentage.
7- Draw a straight line between points A and B.
8- Draw a vertical line through point C.
9- Draw a horizontal line where the two lines meet. Read
the percent of fresh air intake on the side.
CHART 1
CALCULATE MINIMUM FRESH AIR PERCENTAGE
MIXED AND RETURN AIR TEMPERATURE
_F
_C
0
-20
-29
-10
-23
0
-18
10
-12
20
-7
30
-1
40
4
50
10
60
16
70
21
C
80
27
90
32
100 _F
38 _C
B
0
10
10
20
20
30
30
40
40
50
50
60
60
70
70
80
80
90
90
A
100
_F -20
_C -29
-10
-23
0
-18
10
-12
20
-7
30
-1
40
4
100
50
10
60
16
70
21
OUTDOOR AIR TEMPERATURE
Page 14
80
27
90
32
100 _F
38 _C
IAQ Sensor
Standard Economizer Operation
When the outdoor air is suitable, dampers will modulate
between minimum position and full open to maintain 55_F
(12.8_C) supply air.
See table 5 for economizer operation when outdoor air is
suitable. See table 6 for economizer operation when
outdoor air is NOT suitable.
During the occupied period, dampers will open to DCV MAX
when IAQ reading is above setpoint (regardless of
thermostat demand or outdoor air suitability). DCV MAX will
NOT override damper full-open position. The DCV MAX
setting may override damper free cooling position when
occupancy is high and outdoor air temperatures are low.
NOTE - If R1 senses mixed air temperature below 45_F
(7_C), dampers will move to fully closed until mixed air
temperature rises to 48_F (9_C).
TABLE 5
ECONOMIZER OPERATION
OUTDOOR AIR IS SUITABLE FOR FREE COOLING -- FREE COOL LED
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
THERMOSTAT DEMAND
DAMPER
MECHANICAL COOLING
UNOCCUPIED
OCCUPIED1
OF
Closed
Closed
No
G
Closed
Minimum
No
Y1
Modulating*
Modulating*
No
Y2
Modulating*
Modulating*
STAGE 1
*IAQ sensor can open damper to DCV max.
1Damper position when no occupied/unoccupied signal is available from building thermostat or energy management system.
TABLE 6
ECONOMIZER OPERATION
OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING -- FREE COOL LED “OFF”
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
THERMOSTAT DEMAND
DAMPER POSITION
OCCUPIED1
UNOCCUPIED
MECHANICAL COOLING
Off
Closed
Closed
No
G
Closed
Minimum*
No
Y1
Closed
Minimum*
Stage 1
Y2
Closed
Minimum*
Stage 1
*IAQ sensor can open damper to DCV max.
1Damper position when no occupied/unoccupied signal is available from building thermostat or energy management system.
Page 15
allowing the economizer damper to stay open 100%. The
damper will stay open 100% with the compressor running
simultaneously until Y2 demand is met.
High Performance Economizer Operation
OPERATION
Refer to table 7 or 8.
When the outdoor air is suitable and a thermostat demand
calls for 1st. stage cooling (Y1), the economizer will
modulate the dampers between the minimum and fully
open positions to maintain a 55_F (12.8_C) mixed air
temperature. When there is an increased thermostat
demand for second stage cooling (Y2), the economizer
damper opens 100% and the economizer controller (A6)
will bring on the compressor. At that point, K8 relay will
switch from the R1 mixed air sensor to R51 resistor
NOTE – Because of the sensor location, the mixed air
temperature displayed on the economizer controller (A6)
is only true when no mechanical cooling or heating is
initiated. During mechanical cooling (compressor
running), the MA temperature displayed will be the
temperature equivalent of the fixed resistor and not the
actual MA temperature.
TROUBLESHOOTING, ALARMS AND
CHECKOUT TESTS
Refer to the Honeywell manual provided for details.
TABLE 7
ECONOMIZER OPERATION - NO DCV (CO2 SENSOR)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
DCV
None
None
OA Good to
Economize?
No
Yes
Y1-I
Y2-I
Y1-O
Y2-O
Occupied
Unoccupied
Off
Off
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
24-v/On
0-v/Off
MIN POS
Closed
On
On
24-v/On
24-v/On
MIN POS
Closed
Off
Off
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
0-v/Off
0-v/Off
MIN POS to Full-Open
Closed to Full-Open
On
On
24-v/On
0-v/Off
Full-Open
Full-Open
TABLE 8
ECONOMIZER OPERATION - WITH DCV (CO2 SENSOR)
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
DCV
OA Good to
Economize?
No
Below set
Yes
No
Above set
Yes
Y1-I
Y2-I
Y1-O
Y2-O
Occupied
Unoccupied
Off
Off
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
24-v/On
0-v/Off
VENTMIN
Closed
On
On
24-v/On
24-v/On
VENTMIN
Closed
Off
Off
0-v/Off
0-v/Off
VENTMIN
Closed
On
Off
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
On
On
24-v/On
0-v/Off
Full-Open
Full-Open
Off
Off
0-v/Off
0-v/Off
VENTMIN to VENTMAX
Closed
On
Off
24-v/On
0-v/Off
VENTMIN to VENTMAX
Closed
On
On
24-v/On
24-v/On
VENTMIN to VENTMAX
Closed
Off
Off
0-v/Off
0-v/Off
VENTMIN to VENTMAX
Closed
On
Off
0-v/Off
0-v/Off
VENTMIN to Full-Open
Closed to Full-Open
On
On
24-v/On
0-v/Off
Full-Open
Full-Open
Page 16
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