MicroMetl ECD-SRT12TA-D2 Series User manual

1
Installation Instructions
ECD-SRT12TA-D2, ECD-SRT34TA-D2, ECD-SRT05TA-D2 Series
Read these instructions completely before attempting to install the Vertical
Accessory Ultra Low Leak Economizer.
CONTENTS
Safety Consideration . . . . . . . . . . . . . . . . . . . . .1
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Economizer Sensor Usage. . . . . . . . . . . . . . . . . . . . .2
Accessories List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
W7220 Menu Structure. . . . . . . . . . . . . . . . . . . . .9-12
Controller Setup and Conguration. . . . . . . .13-15
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Barometric Relief and Return Pressure
Drop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
*Jade W7220 Controller Addendum
*Certicate of Acceptance
Use QR Code Above to Access
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous dur to system pressure and electrical components. Only
trained and qualied service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform the basic maintenance funtions.
All other operations should be performed by trained service
personnel. When working on air-conditioning equipment, observe
precautions in the literature, tags, and labels attached to the unit,
and other safety precautions that may apply.
Follow allsafety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations.
It is important to recognize safety information. This is the safety-
alert symbol . When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identies the most serious hazards which will result
in severe personal injury or death. WARNING signies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
Small Rooftop Products
Select 3 to 12 ½ Tons
Accessory Ultra Low Leak Vertical Economizer
!
MicroMetl
California
& ASHRAE
Code
Compliant
WARNING
Electrical Shock Hazard
Can cause severe injury, death or property damage. Disconnect
power supply before beginning wiring, or making wiring
connections, to prevent electrical shock or equipment damage.
!
CAUTION
Equipment Damage Hazard
Electrostatic discharge can short equipment circuitry. Ensure
that you are properly grounded before handling the unit.
!
Economizer
Package Unit Chassis
48/50TC 48/50HC 48/50LC 50TCQ 48/50HCQ
Carrier Bryant ICP Carrier Bryant ICP Carrier Carrier Bryant ICP Carrier Bryant ICP
ECD-SRT12TA
Chassis 1
48/50TC
A04,A05,A06,
B04,B05,B06
580J,558J
04A,05A,06A,
04G,05G,06G
RGS,RAS
036,048,060 48/50HC A04 581J,551J 04A RGH,RAH 036 48/50LC A04 50TCQ A04,A05
548J
04A,05A
RHS
036, 048 50HCQ A04 549J 04A RHH 036
Chassis 2 48/50TC
A07,B07
580J,558J
07A,07G RGS,RAS 072 48/50HC A05,A06
581J,551J
05A,06A
RGH,RAH
048,060
48/50LC
A05,A06
50TCQ
A06,A07
548J
06A,07A
RHS
060,072
50HCQ
A05,A06
549J
05A,06A
RHH
048,060
ECD-SRT34TA
Chassis 3 48/50TC
A08,D08
580J,558J
08A,08D
RGS,RAS
090,091 48/50HC A07 581J,551J 07A
RGH,RAH
072 N/A N/A N/A N/A 50HCQ A07 549J 07A RHH 072
Chassis 4a 48/50TC
A09,A12,
D09,D12,D14
580J,558J
09A,12A,
09D,12D,14D
RGS,RAS
101,102,121
120,150
48/50HC
D08,D09
581J,551J
09D,12D
RGH,RAH
090,120 48/50LC 07 50TCQ D08,D09,D12
548J
08D,09D,12D
RHS
090,102,120
50HCQ
D08,D09
549J
08D,09D
RHH
090,102
Chassis 4b
ECD-SRT05TA Chassis 5 48/50TC D16 580J,558J 16D RGS,RAS 180 48/50HC D14 581J,551J 14D RGH,RAH 150 48/50LC
08,09,12 N/A N/A N/A N/A N/A N/A
Chassis 5 N/A N/A N/A N/A N/A N/A N/A 50TCQ D14 548J 14D RHS 150 50HCQ D12 549J 12D RHH 120
Base Chasis/Curb Design (3-23 ton)
GENERAL (When ordered with controls)
The system utilizes the latest technology available for integrating
the use of free cooling with mechanical cooling for packaged
rooftop units. The solid-state control system optimizes energy
consumption, zone comfort, and equipment cycling by operating
the compressors when the outdoor-air temperature is too warm,
integrating the compressor with outdoor air when free cooling
is available, and locking out the compressor when outdoor-air
temperature is too cold. Demand control ventilation is supported.
This can be used with single or multiple speed indoor fans.
The MicroMetl Ultra Low Leak Economizer utilizes gear-driven
technology with a direct-mount spring return actuator that will close
upon loss of power. When ordering with controls, The Ultra Low
Leak Economizer comes standard with a Mixed Air Sensor (Also
called The Supply Air Temperature Sensor), and the option of
Adjustable Dry Bulb, Enthalpy, Differential Adjustable Dry Bulb, and
Differential Enthalpy Sensors. CO2 and Smoke Detectors Sensor
are an additional eld installed option.
Table 1
*QR Code

2
IMPORTANT: These economizers meet all the economizer
requirements as laid out in ASHRAE Standard 90.1-2010, Table
6.4.3.4.4 requirements and California’s Title 24 mandatory section
120.2 (fault detection and diagnostics) and prescriptive section
140.4 (life-cycle tests, damper leakage, sensor accuracy, etc).
Economizer must be installed perfectly square to avoid damper
leakage or damper binding. Squareness tolerance +/- 1/32”.
Standard barometric relief dampers provide natural building
pressurization control.An optional power exhaust system is available
for applications requiring even greater exhaust capabilities. The
power exhaust set point is adjustable at the controller.
See Table 1 for economizer package usage. See Table 2 for
packing contents.
Unpack and inspect economizer contents from carton. Contact
MicroMetl immediatly if any parts are missing or damaged.
GENERAL
MicroMetl accessories simplify and minimize procedures on rooftop
applications. Read these instructions completely before beginning.
These installation instructions pertain to the vertical economizer.
1. Turn off unit power supply(s) and install lockout tag.
2. Remove the existing unit lter access panel. Raise the panel
and swing the bottom outward. The panel is now disengaged
from the track and can be removed. (See Fig. 4.)
3. Remove the indoor coil access panel and discard. (See Fig. 4.)
4. The hood is shipped with the Ultra Low Leak Economizer.
Remove hood from packaging.
NOTE: If the power exhaust accessory is to be installed on the unit,
the hood shipped with the Ultra Low Leak Economizer will not be
used and may be discarded. Save the aluminum lter for use in the
power exhaust hood assembly.
5. Set the Ultra Low Leak Economizer upright.
6. Slide the Ultra Low Leak Economizer assembly into the
rooftop unit. (See Fig. 7). On small and large cabinets be sure
to engage the rear Ultra Low Leak Economizer ange under
the tabs in the return-air opening of the unit base. (See Fig. 8)
7. Secure the Ultra Low Leak Economizer to unit along side and
bottom anges using the screws provided.
8. Remove the tape securing the relief dampers in place.
9. Remove and save the 12-pin jumper plug from the unit wiring
harness (located in the upper left corner of the unit). Insert the
Ultra Low Leak Economizer plug into the unit wiring harness.
Refer to Fig. 9 and 10A for wiring details.
Fig. 1 - Component Locations —
(Small Economizer Shown)
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Disconnect power supply and install lockout tag before attempting to
install accessory.
!
Outside Air
Temperature
Sensor or
nthalpy Sensor
Actuator
(Hidden)
Wiring
Harness
Table 2 - Packaging List
Assembled Hood with Divider & Aluminum Filter(s)
Ultra Low Leak Damper Assembly
Self Drilling Screws
1/8" Gray Gasket
NOTE: The 12-pin jumper plug should be saved for future use, in
the event that the Ultra Low Leak Economizer is removed from the
unit. The jumper plug is not needed as long as the Ultra Low Leak
Economizer is installed.
10. If Ultra Low Leak Economizer will be operating under enthalpy
control, an enthalpy sensor will be used in place of the dry bulb
sensor.
11. Remove the indoor fan motor access panel. (See Fig. 10.)
20k-Ohm Dry Bulb Sensor SylkBus Sensor
Address Dip Switch array
Shipped for OA applications
SENSOR & CONTROLS
JADE requires a C7250A for Mixed Air (MA) sensing. The C7250A
temperature sensors are 20k Negative Temperature Coefcient
(NTC). The C7250A MA sensor is required for all applications and
must be mounted in the unit’s mixed air stream (normally the fan
section) either directly to the sheet metal of the fan using self-
tapping sheet metal screws, or in the air stream using the duct
mounting kit. The C7250A must be wired into the two terminals
on JADE labeled “MAT”. The C7250A sensor must be used in all
applications.
Optional Enthalpy or Dry Bulb Sensor
Both are optional, but at least one must be chosen. The Dry Bulb
Sensor C7250A, or the Enthalpy Sensor C7400S gets wired into
JADE’s S-BUS terminals. Either must be placed under the Outside
Air Hood, or in full exposure to the outside air weather conditions.
NOTE: The protective lm on the dip switch is only necessary
during the factory assembly process. Simply push through the lm
to set the dip switches; this will not harm the device.
Once installed, a sensor can be changed to a different application
by simply changing the DIP switch setting and relocating to the
appropriate location.

3
Fig. 2 - Barometric Relief Flow Capacity
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RELIEF FLOW (CFM)
RETURN DUCT STATIC PRESSURE (in. wg)
Small
Cabinet
Large and
Extra
Large
Cabinet
Fig. 3 - Return Air Pressure Drop
0
1000
2000
3000
4000
5000
6000
00.1 0.2 0.3 0.4
RETURN AIR FLOW (CFM)
RETURN DUCT STATIC PRESSURE DROP (in. wg)
Small Cabinet
Large Cabinet
Extra Large Cabinet
Optional CO2 Sensor
Any CO2 Sensor which has a 0-10 Vdc output can be used. We
recommend the MicroMetl 9901-0051 Wall or Internal Duct Mount,
or the MicroMetl 9901-0052 External Duct Mount. CO2 connects
to the IAQ outputs of the JADE Controller.
Optional Smoke Detector
The JADE Controller is designed to allow a shutdown command
from devices similar to a Smoke Detector. A Smoke Detector
connects to the AUX inputs of the JADE Controller. However, if the
JADE Controller is previously programmed to interface with a heat
pump, this function may not be available. The only other option is
to route the power to the JADE through a smoke detector, therefore
removing the power if a re or smoke is detected. Normal default
for power off is often a complete closing of all outside dampers.
Warning: Any circumstance which involves emergency shutdown
should be carefully studied and written into company policy. Please
adhere to all applicable electrical, local, and re emergency codes
before integrating emergency devices into your HVAC scheme.
We recommend the MicroMetl 9901-0091 Smoke Detector.
Optional Power Exhaust
MicroMetl carries a large variety of Power Exhausts. To control the
Power Exhaust output, connect to (Ground) GND and EXH1-0 on
the JADE Controller.
Typical C7250 Sensor Location
Mixed Air
Temperature
Sensor
Mounting
Location
STARTUP INSTRUCTIONS
Once the economizer and all electronics are correctly installed and
wired. Apply power to the system and wait sixty minutes before
checking for alarms. This allows time for all the congured devices
(e.g. sensors, actuator) to become operational. The exception is
the MA sensor which will alarm immediately! Upon power up (or
after a power outage or brownout), the W7220 controller module
begins a ve minute power up delay before enabling mechanical
cooling.
Actuator – Communicating
This Actuator Communicates to the JADE Controller and is
required by some codes. It works with JADE to provide improved
control, eld detection, diagnostics, and save time during setup
and testing. Connects to the S-bus and, ACT COM, and ACT 24+
on the JADE Controller.

4
Fig. 4 - Typical Outdoor-Air Section
Access Panel Locations
Compressor
Access Panel
Outdoor-Air Opening and
Indoor Coil Access Panel
Filter Access Panel
Fig. 5 - Hood Assembly
AB
CHood Top and
Side Assembly
Hood Divider
D
Fig. 6 - Filter Installation
Hood Top Filter Clip
Outside Air
Cleanable
Aluminum Filter
Barometric
Airow
Hood
Divider
ECONOMIZER P/N A B C D SHIP WT.
ECD-SRT12TA-D2 33.37” 17.43” 19.05” 29.5” 55 lb
ECD-SRT34TA-D2 40.37” 22.28” 24.48” 36.27” 80lb
ECD-SRT05TA-D2 52.92” 27.03” 33.41” 49.92” 98lb
NOTE: The ECD-SRT05TA-D2 Series hood has 2 aluminum
lters and a hood lter divider installed between the lters. (See
Fig. 6A.)
Fig. 7 - Ultra Low Leak Economizer Installed in
HVAC Unit
Fig. 6A - Hood for Extra Large Cabinet
Hood Filter
Divider
HVAC Unit Filters
Insert
Screw in
Flanges
Wiring
Harness
Economizer
Fig. 8 - Rear Ultra Low Leak Economizer Flange
Installation (Small and Large Cabinet)
Unit Filter
Rack
Unit Base
Hold Down Tab
Rear Flange

5
PL6
Economizer X
Control box
Central
TermBrd
ECONO
W7720
Unplug the 10-pin plug from
PL6 from the Central Terminal
Bo ard (in control box) and plug
into 10-pin plug from W7220
Plug 10-pin plug from
W7220 into ECONO
terminals on Central
Terminal Board
Indoor Blower
Section
SATORN
BRN
48TMHSRSE--A20
harness with 4- pin
plug
Connect SAT sensor and Pink
and Violet wires from PL6 to
the 48TMHSRSE—A20
harness.
See Picture
D. Connect other 10-pin plug from W7220 controller into ECONO
terminals on CTB. See picture above. On the 10-pin take the
red wire with a spade connector and connect it to "R" on the
CTB, take the brown wire with a spade connector and connect
it to "C" on the CTB.
E. Connect 4-pin plug from the W7220 controller to the 4-pin
harness provided with economizer accessory.
F. Route harness back to the indoor blower section of the unit.
G. Mount Supply (or Mixed) Air Temperature sensor, and connect
Brown and Orange wires from harness to the SAT.
H. Connect Pink and Violet wires from harness to the Pink and
Violet wires from PL6 economizer harness
Fig. 9 - Harness Detail
WIRING INSTRUCTIONS FOR SINGLE OR MULTIPLE SPEED
INDOOR FAN
A. Install W7220 (with harnesses attached) in unit control box.
See wiring diagram in instructions.
B. Unplug 10-pin plug shown above in picture, from Central
Terminal Board (CTB).
C. Attach 10-pin plug disconnected from (CTB) to 10- pin plug
harness from W7220 controller.
12. Locate the mixed (supply) air temperature sensor in the
economizer hardware bag. Mount the sensor in the indoor
fan section of the unit, see Figure 12. Locate the orange
and brown wires in the wire bundle in the indoor fan section.
Connect these orange and brown wires to the 2-wire harness
attached to the Sensor.
Mixed air default setting is 53°F and can be adjusted from 38°F
to 70°F.
13. While everything is open, install and wire any other accessories
and/or sensors as applicable and convenient, per their
installation instructions and/or the Conguration section of this
instruction. Some accessories require that unit ducting already
be installed.
NOTE: If also installing a power exhaust accessory, skip step 14
and follow the power exhaust instructions instead.
14. Install the Ultra Low Leak Economizer hood over the Ultra Low
Leak Economizer. Use screws provided.
15. The W7220 controller is shipped mounted to a bracket. Install
the controller / bracket in the top left corner of the unit control
box as shown in wiring diagram, Fig. 9 and 10A. Screw in
place through pre-punched holes.
16. For 1 and 2 speed units connect the plugs coming from the
controller as shown in wiring diagram, Fig. 9 and 10A.
NOTE: Provided harness will be connected as shown in Fig. 9
and 10A.
17. For 3 speed (48/50LC 07-12) units, the harness attached to
the W7220 controller must be removed, and can be discarded.
Locate harness shipped in plastic bag in the control box of unit.
Attach this harness to the W7220 controller as shown in Fig
10B and 10C.
NOTE: Harness provided with economizer is not used with 3 speed
(48/50LC 07-12) units.
18. Adjust controller settings (minimum position, outside air, etc.)
per instructions detailed later in this instruction.
19. Follow all local and other applicable codes.

6
Fig. 10A - Typical Wiring Diagram For 1 and 2 Speed Units
(2 Speed Diagram Shown)
If using the OA enthalpy accessory,
the OAT must be removed. Set sensor
dip-switches, See Table 11.
48TMHSRSE--A20
Harness

7
Fig. 10B - Typical Wiring Diagram For 3 Speed Units (48/50LC 07-12)
(See 3 Speed Unit Instructions for Complete Diagram)
NOTES:
1. Wires shown in bold are part of harness which is provided
with 48/50LC 07-12 3 speed units.
2. Harness which is provided with economizer accessory is not
used on 3 speed units.

8
Fig. 10C - 48LCHSRADH--A00 Harness for 3 Speed Units (48/50LC 07-12)
(Provided with 3 Speed Units)
FIELD ATTACH TO W7220 CONTROLLER
CONNECT TO UNIT
TERMINAL BOARD
CONNECT TO
UNIT TERMINAL
BOARD

9
Fig. 11 - Typical Indoor Fan Motor
Access Panel Locations
Indoor Fan Motor
Access Panel
Heating Access
Panel
Thermostat
Connection
Access Panel
Center Post
Fig. 12 - Mixed Air Sensor Installation
Mixed Air
Temperature
Sensor
Mounting
Location
Using the Keypad with Menus
To use the keypad when working with menus:
• Press the ▲ (Up arrow) button to move to the previous menu.
• Press the ▼ (Down arrow) button to move to the next menu.
• Press the (Enter) button to display the rst item in the
currently displayed menu.
• Press the ↑ (Menu Up/Exit) button to exit a menu’s item and
return to the list of menus.
Using the Keypad with Settings and Parameters
To use the keypad when working with Setpoints, System and
Advanced Settings, Checkout tests and Alarms:
1. Navigate to the desire menu.
2. Press the (Enter) button to display the rst item in the
currently displayed menu.
3. Use the ▲ and ▼ buttons to scroll to the desired parameter.
4. Press the (Enter) button to display the value of the currently
displayed item.
5. Press the ▲ button to increase (change) the displayed
parameter value.
6. Press the ▼ button to decrease (change) the displayed
parameter value.
NOTE: When values are displayed, pressing and holding the ▲
or ▼ button causes the display to automatically increment.
Fig. 13 - W7220 Controller
7. Press the (Enter) button to accept the displayed value and
store it in nonvolatile RAM.
8. “CHANGE STORED” displays.
9. Press the (Enter) button to return to the current menu
parameter.
10. Press the ↑ (Menu Up/Exit) button to return to the previous
menu.
Menu Structure
Table 3 illustrates the complete hierarchy of menus and parameters
for the Ultra Low Leak system.
The Menus in display order are:
• STATUS
• SETPOINTS
• SYSTEM SETUP
• ADVANCED SETUP
• CHECKOUT
• ALARMS
IMPORTANT: Before being placed into service, the JADE
Economizer Module must be set up and configured for the installed
system.

10
Table 3 ─Menu Structure a
IMPORTANT: Table 1 illustrates the complete hierarchy. Your menu parameters may be different depending on your conguration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear.
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
STATUS ECON AVAIL NO YES/NO YES = economizing available; the system can use
outside air for free cooling when required
ECONOMIZING NO YES/NO YES = outside air being used for 1st stage cooling
OCCUPIED NO YES/NO YES = OCC signal received from space thermostat
or unitary controller
YES = 24 Vac on terminal OCC.
NO = 0 Vac on terminal OCC.
HEAT PUMP n/acCOOL
HEAT
Displays COOL or HEAT when system is set to heat pump
(Non-conventional)
COOL Y1─IN OFF ON/OFF Y1─I signal from space thermostat or unitary controller for
cooling stage 1.
ON = 24 Vac on terminal Y1─I
OFF = 0 Vac on terminal Y1─I
COOL Y1─OUT OFF ON/OFF Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1─OUT terminal)
COOL Y2─IN OFF ON/OFF Y2─I signal from space thermostat our unitary controller for
second stage cooling.
ON = 24 Vac on terminal Y2─I
OFF = 0 Vac on terminal Y2─I
COOL Y2─OUT OFF ON/OFF Cool Stage 2 Relay Output to mechanical cooling
(Y2─OUT terminal)
MA TEMP _ _ . _oF -40°F to 150°F Displays value of measured mixed air from MAT sensor.
Displays _ _ . _ oF if not connected, short or out-of-range.
DA TEMP _ _ . _oF -40°F to 150°F Displays when Discharge Air sensor is connected and
displays measured discharge temperature.
Displays _ _ . _oF if sensor sends invalid value, if not con-
nected, short or out-of-range.
OA TEMP _ _ . _oF -40 to 140oF Displays measured value of outdoor air temperature.
Displays _ _ . _oF if sensor sends invalid value, short or
out-of-range.
OA HUM _ _% 0 to 100% Displays measured value of outdoor humidity from OA
sensor.
Displays _ _% if not connected short, or out-of-range.
RA TEMP _ _ . _oF 0 to 140oF Displays measured value of return air temperature from
RAT sensor.
Displays _ _ . _oF if sensor sends invalid value, if not
connected, short or out-of-range
RA HUM _ _% 0 to 100% Displays measured value of return air humidity from RA
sensor.
Displays _ _% if sensor sends invalid value, if not con-
nected, short or out-of-range
IN CO2 _ _ _ppm 0 to 2000
(3500) ppm
Displays value of measured CO2 from CO2 sensor. Invalid
if not connected, short or out-of-range. May be adjusted in
Advanced menu by Zero offset and Span
DCV STATUS n/a ON/OFF Displays ON if above setpoint and OFF if below setpoint,
and ONLY if a CO2sensor is connected.
DAMPER OUT 2.0V 2.0 to 10.0V Displays voltage output to the damper actuator.
ACT POS. n/a 0 to 100% Displays actual position of actuator.
ACT COUNT n/a 1 to 65,535 Displays number of times actuator has cycled. 1 Cycle
equals 180° of movement in any direction.
ACTUATOR n/a OK/Alarm (on
Alarm menu)
Displays Error if voltage or torque is below actuator range
EXH1 OUT OFF ON/OFF Output of EXH1 terminal.
ON = relay closed; OFF = relay open.

11
Table 3 ─Menu Structurea (cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and
Incrementb
Notes
STATUS
(CONT.)
EXH2 OUT OFF ON/OFF Output of AUX1 O terminal; displays only if AUX1 O = EXH2
ERV OFF ON/OFF Output of AUX1 O terminal; displays only if AUX1 O = ERV
MECH COOL ON 0 0, 1, or 2 Displays stage of mechanical cooling that is active.
FAN SPEED n/a LOW or HIGH Displays speed of fan on a 2-speed fan unit.
W (HEAT IN) n/a ON/OFF Displays status of heat on a 2-speed fan unit.
SETPOINTS MAT SET 53oF 38 to 65oF;
increment by 1
Setpoint determines where the economizer will modulate the OA
damper to maintain the mixed air temperature.
LOW T LOCK 32oF -45 to 80oF;
increment by 1
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on. Commonly referred to as the Compressor lockout.
DRYBLB SET 63oF 48 to 80oF;
increment by 1
Setpoint determines where the economizer will assume outdoor air
temperature is good for free cooling; e.g.; at 63oF unit will economize at
62oF and below and not economize at 64oF and above. There is a 2oF
deadband.
ENTH CURVE ES3 ES1,ES2,ES3,ES4,
or ES5
Enthalpy boundary “curves” for economizing using single enthalpy
DCV SET 1100ppm 500 to 2000ppm;
increment by 100
Displays only if CO2sensor is connected. Setpoint for Demand Control
Ventilation of space. Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space ppm level below the
setpoint.
MIN POS 2.8 V 2 to 10 Vdc Displays ONLY if a CO2 sensor is NOT connected. With 2-speed fan
units MIN POS L (low speed fan) and MIN POS H (high speed fan)
settings are required. Default for MIN POS L is 3.2V and MIN POS H
is 2.8V
VENTMAX 2.8 V 2 to 10 Vdc
or
100 to 9990 cfm
increment by 10
Displays only if a CO2 sensor is connected.
Used for Vbz (ventilation max cfm) setpoint.
Displays 2 to 10 V if <3 sensors (RA,OA and MA).
In AUTO mode dampers controlled by CFM
With 2-speed fan units VENTMAX L (low speed fan) and VENTMAX H
(high speed fan) settings are required. Default for VENTMAX L is 3.2V
and VENTMAX H is 2.8V
VENTMAX L 3.2 V
VENTMAX H 2.8 V
VENTMIN 2.25 V 2 to 10 Vdc
or 100 to 9990 cfm
increment by 10
Displays only if CO2 sensor is connected.
Used for Va (ventilation min cfm) setpoint.
Displays 2 to 10 V if <3 sensors (RA,OA and MA). Va is only set if DCV
is used. This is the ventilation for less than maximum occupancy of the
space.
In AUTO mode dampers controlled by CFM
With 2-speed fan units VENTMIN L (low speed fan) and VENTMIN H
(high speed fan) settings are required. Default for VENTMIN L is 2.5V
and VENTMIN H is 2.25V
VENTMIN L 2.5 V
VENTMIN H 2.25 V
ERV OAT SP 32oF 0 to 50oF;
increment by 1
Only when AUX1 O = ERV
EXH1 SET 50% 0 to 100%;
increment by 1
Setpoint for OA damper position when exhaust fan 1 is powered by the
economizer.
With 2-speed fan units Exh1 L (low speed fan) and Exh1 H (high speed
fan) settings are required. Default for Exh1 L is 65% and Exh1 H is 50%
EXH1 L 65%
EXH1 H 50%
EXH2 SET 75% 0 to 100%;
increment by 1
Setpoint for OA damper position when exhaust fan 2 is powered by the
economizer. Only used when AUX1 O is set to EHX2.
With 2-speed fan units Exh2 L (low speed fan) and Exh2 H (high speed
fan) settings are required. Default for Exh2 L is 80% and Exh2 H is 75%
EXH2 L 80%
EXH2 H 75%
SYSTEM
SETUP
INSTALL 01/01/10 Display order = MM/DD/YY
Setting order = DD, MM, then YY.
UNITS DEG oFoF or oC Sets economizer controller in degrees Fahrenheit or Celsius
EQUIPMENT CONV CONV
HP
CONV = conventional.
HP O/B = Enables Heat Pump mode. Use AUX2 I for Heat Pump input
from thermostat or controller.

12
Table 3 ─Menu Structurea (cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
SYSTEM
SETUP
AUX2 I SD SD/W or HP(O)/HP(B) In CONV mode:
SD = Enables conguration of shutdown (default);
W = Informs controller that system is in heating mode.
In HP O/B mode:
HP(O) = energize heat pump on Cool (default);
HP(B) = energize heat pump on Heat.
FAN SPEED 1 speed 1 speed/2 speed Sets economizer controller for operation of 1 speed or 2 speed supply
fan
FAN CFM 5000cfm 100 to 15000 cfm;
increment by 100
This is the capacity of the RTU. The value is found on the label from the
RTU manufacturer.
AUX OUT NONE NONE
ERV
EXH2
SYS
• NONE = not congured (output is not used)
• ERV= Energy Recovery Ventilatord
• EXH2 = second damper position relay closure for second exhaust fan.
• SYS = use output as an alarm signal
OCC INPUT INPUT or ALWAYS When using a setback thermostat with occupancy out (24 Vac), the 24
Vac is input “INPUT” to the OCC terminal. If no occupancy output from
the thermostat then change program to “ALWAYS” OR ad a jumper
from terminal R to OCC terminal.
FACTORY DEFAULT NO NO or YES Resets all set points to factory defaults when set to YES. LCD will
briey ash YES and change to NO but all parameters will change to
factory default values.
ADVANCED
SETUP
MA LO SET 45oF 35 to 65oF;
Incremented by 1o
Temp to activate Freeze Protection (close damper and alarm if temp
falls below setup value)
FREEZE POS CLO CLO or MIN Damper position when freeze protection is active (closed or MIN POS).
CO2 ZERO 0ppm 0 to 500 ppm;
Increment by 10
CO2 ppm level to match CO2 sensor start level.
CO2 SPAN 2000ppm 1000 to 3000 ppm;
Increment by 10
CO2 ppm span to match CO2 sensor.
STG3 DLY 2.0h 0 min, 5 min, 15 min,
then 15 min intervals.
Up to 4 h or OFF
Delay after stage 2 for cool has been active. Turns on 2nd stage of
cooling when economizer is 1st stage and mechanical cooling is 2nd
stage. Allows three stages of cooling, 1 economizer and 2 mechanical.
OFF = no Stage 3 cooling.
SD DMPR POS CLO CLO or OPN Indicates shutdown signal from space thermostat or unitary controller.
When controller receives 24 Vac input on the SD terminal in
conventional mode, the OA damper will open if programmed for OPN
and OA damper will close if programmed for CLO. All other controls,
e.g., fans, etc. will shut off.
DA LO ALARM
DA HI ALARM
DCVCAL ENA MAN MAN (manual)
AUTO
Turns on the DCV automatic control of the dampers. Resets ventilation
based on the RA, OA, and MA sensor conditions. Requires all 3 RA,
OA, and MA sensors. Not aperable with 2-speed fan.
MAT T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
OA T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
OA H CAL 0% RH +/-10% RH Allows for operator to adjust for an out of calibration humidity sensor.
RA T CAL 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
RA H CAL 0% RH +/-10% RH Allows for operator to adjust for an out of calibration humidity sensor.
DA T CA; 0.0oF +/-2.5oF Allows for the operator to adjust for an out of calibration temperature
sensor.
2-SPEED FAN DELAY 5 MIN 0-20 Min
in 1 min increments
When in economizing mode this is the delay for the high speed
fan to try to satisfy the call for second stage cooling before the
rst stage mechanical cooling is enabled.
CHECKOUT DAMPER VMIN-HS Positions damper to VMIN position.
DAMPER VMAX-HS
(LS)
Positions damper to VMAX position. With 2-speed fan units the
damper will position to VMAX low speed fan.
DAMPER OPEN n/a n/a Position damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test. Make
sure you pause in the mode to allow exhaust contacts to energize due
to the delay in the system.
DAMPER CLOSE n/a n/a Positions damper to the fully closed position
CONNECT Y1─O n/a n/a Closes the Y1─O relay (Y1─O)
CONNECT Y2─O n/a n/a Closes the Y2─O relay (Y2─O)

13
Table 3 ─Menu Structurea (cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and IncrementbNotes
CHECKOUT CONNECT AUX n/a n/a Energizes the AUX output. If Aux setting is:
• NONE ─ not action taken
• ERV ─ 24 Vac out. Turns on or signals an ERV that the conditions
are not good for economizing but are for ERV operation.d
• SYS ─ 24 Vac out. Issues a system alarm
CONNECT EXH1
ALARMS(#)
CONTINUED
Alarms display only when they are active. The menu title
“ALARMS(#)” includes the number of active alarms in parenthe-
sis ( ). When using SYLK bus sensors, “SYLK” will appear on the
screen, and when using 20k OA temperature sensors, “SENS T”
will appear on the screen
MA T SENS ERR n/a n/a Mixed air sensor has failed or become disconnected - check wiring then
replace sensor if the alarm continues.
CO2 SENS ERR n/a n/a CO2 sensor has failed, gone out of range or become disconnected -
check wiring then replace sensor if the alarm continues.
OA SYLK T ERR n/a n/a Outdoor air enthalpy sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
OA SYLK H ERR n/a n/a
RA SYLK T ERR n/a n/a Return air enthalpy sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
RA SYLK H ERR n/a n/a
DA SYLK T ERR n/a n/a Discharge air sensor has failed or become disconnected - check wiring
then replace sensor if the alarm continues
OA SENS T ERR Outdoor air temperature sensor has failed or become disconnected -
check wiring then replace if the alarm continues.
ACT ERROR n/a n/a Actuator has failed or become disconnected - check for stall, over
voltage, undervoltage and actuator count. Replace actuator if damper
is moveable and supply voltage is between 21.6 V and 26.4 V. Check
actuato count on STATUS menu
FREEZE ALARM n/a n/a Check if outsoor temperature is below the LOW Temp Lockout on
setpoint menu. Check if Mixed air temperature on STATUS menu is
below the Lo Setpoint on Advanced menu. When conditions are back in
normal range then the alarm will go away.
SHUTDOWN ACTIVE n/a n/a AUX2 IN is programmed for SHUTDOWN and 24 V has been applied
to AUX 2IN terminal.
DMP CAL RUNNING n/a n/a If DCV Auto enalbe has been programmed, when the Jade is
completing a calibration on the dampers, this alarm will display. Wait
until the calibration is completed and the alarm will go away. Must have
OA, MA and RA sensors for DCV calibration; set up in the Advanced
setup menu.
DA SENS ALM n/a n/a Discharge air temperature is out of the range set in the ADVANCED
SETUP Menu. Check the termperature of the discharge air.
SYS ALARM n/a n/a When AUX1-0 is set to SYS and there is any alarm (e.g., failed
sensors, etc.), the AUX1-0 terminal has 24 Vac out.
ACT UNDER V n/a n/a Voltage received by Actuator is above expected range.
ACT OVER V n/a n/a Voltage recieved by Actuator is below expected range.
ACT STALLED n/a n/a Actuator stopped before achieving commanded position.
a Table 3 illustrates the complete hierarchy. Your menu parameters may be different depending on your conguration.
For example if you do not have a DCV (CO2) sensor, then none of the DCV parameters appear
b When values are displayed, pressing and holding the ▲ or ▼ button causes the display to automatically increment.
cn/a = not applicable
dERV Operation: When in Cooling mode AND the conditions are NOT OK for economizing - the ERV terminal will be energized.
In the Heating mode the ERV terminal will be energized when the OA is below the ERV OAT setpoint in the setpoint menu.

14
Checkout Tests
Use the Checkout menu (see Table 3) to test the damper operation
and any congured outputs. Only items that are congured are
shown in the Checkout menu.
NOTE: See User Interface on for information about menu
navigation and use of the keypad.
To perform a Checkout test:
1. Scroll to the desired test in the Checkout menu using the ▲
and ▼ buttons.
2. Press the button to select the item.
3. RUN? appears.
4. Press the button to start the test.
5. The unit pauses and then displays IN PROGRESS.
6. When the test is complete, DONE appears.
7. When all desired parameters have been tested, press the
↑ (Menu up) button to end the test.
Checkout test can be performed at any time during the operation of
the system as a test that the system is operable.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage to equipment
Be sure to allow enough time for compressor startup and
shutdown between checkout tests so that you do not short-
cycle the compressors.
!
SETUP AND CONFIGURATION
W7220 Economizer Module Wiring
Use Fig. 14 and Tables 4 and 5 to locate the wiring terminals for the
economizer module.
NOTE: The four terminal blocks are removable. You can slide out
each terminal block, wire it, and then slide it back into place.
Fig. 14 - W7220 Economizer Module Terminal
Connection Labels
Table 4 - Economizer Module -
Left Hand Terminal Blocks
Table 5 - Economizer Module -
Right Hand Terminal Blocks
Time-out and Screen Saver
When no buttons have been pressed for 10 minutes, the LCD displays a
screen saver, which cycles through the Status items. Each Status item
displays in turn and cycles to the next item after 5 seconds.
Label Type Description
Top Left Terminal Block
MAT
MAT
20k NTC
and COM
Mixed Air Temperature Sensor
(Polarity insensitive connections)
OAT
OAT
20k NTC
and COM
Outdoor Air Temperature Sensor
(Polarity insensitive connection)
S─BUS
S─BUS
S─BUS
(Sylk Bus)
Enthalpy Control Sensor
(Polarity insensitive connection)
Bottom Left Terminal Block
IAQ 2─10 2─10 Vdc Air Quality Sensor Input
(e.g. CO2sensor)
IAQ COM COM Air Quality Sensor Common
IAQ 24V 24 Vac Air Quality Sensor 24 Vac Source
ACT 2─10 2─10 Vdc Damper Actuator Output (2─10 Vdc)
ACT COM COM Damper Actuator Output Common
ACT 24V 24 Vac Damper Actuator 24 Vac Source
Label Type Description
Top Right Terminal Block
n/a The rst terminal is not used
AUX2 I 24 Vac IN Shut Down (SD) or Heat (W)
Conventional only
and
Heat Pump Changeover (O?B) in
Heat Pump mode.
OCC 24 Vac IN Occupied / Unoccupied Input
E - GND E─GND Earth Ground - System Required
EXH1 24 Vac OUT Exhaust Fan 1 Output
AUX1 O 24 Vac OUT Programmable:
Exhaust fan 2 output
or
ERV
or
System alarm output
Bottom Right Terminal Block
Y2─1 24 Vac IN Y2 in - Cooling Stage 2 Input from
space thermostat
Y2─O 24 Vac OUT Y2 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
Y1─I 24 Vac IN Y1 in - Cooling Stage 2 Input from
space thermostat
Y1─O 24 Vac OUT Y1 out - Cooling Stage 2 Output to
stage 2 mechanical cooling
C COM 24 Vac Common
R 24 Vac 24 Vac Power (Hot)
NA
AUX2-
OCC
E-GND
EXH1
AUX1-O
Y2-
Y1-
Y2-O
Y1-O
C
R
50048848-002
Rev. A
NA
A2
OCC
EX
A1
Y2I
Y2O
Y1I
Y1O
C
R
Certied FDD Product
California Title 24, Part 6
HJW10
www.energy.ca.gov
MAT
MAT
OAT
OAT
S-BUS
S-BUS
IAQ 2-10
IAQ COM
IAQ 24V
ACT 2-10
ACT COM
ACT 24V
MA
MA
OA
OA
SB
SB
SB
SB
SB
SB
V
C
R
V
C
R
NA
50040839-001
Rev. G

15
Fig. 16 - Single Enthalpy Curve boundaries
Table 6 - California Title 24 Regional High Limit Dry Bulb Temperature Settings
Fig. 15 - Dry Bulb
and Mixed Air Sensor
Dry Bulb Sensor
Economizers are shipped standard with an outside air dry bulb
sensor. System default setting (high temp limit) is 63°F, and has
a range of 48° to 80°F. Sensor is factory installed on economizer
(note: a 2nd sensor is provided for mixed air temperature).
Note: California high temperature setting requirements by region
are shown below in Table 6.
TABLE 140.4-B AIR ECONOMIZER HIGH LIMIT SHUT OFF CONTROL REQUIREMENTS
Device TypeaClimate Zones Required High Limit (Economizer Off When):
Description
Fixed Dry Bulb
1, 3, 5, 11-16 Outdoor air temperature exceeds 75°F
2, 4, 10 Outside air temperature exceeds 73°F
6, 8, 9 Outdoor air temperature exceeds 71°F
7 Outdoor air temperature exceeds 69°F
Differential Dry Bulb
1, 3, 5, 11-16 Outdoor air temperature exceeds return air temperature
2, 4, 10 Outdoor air temperature exceeds return air temperature minus 2°F
6, 8, 9 Outdoor air temperature exceeds return air temperature minus 4°F
7 Outdoor air temperature exceeds return air temperature minus 6°F
Fixed Enthalpyb+ Fixed
Dry Bulb All Outdoor air enthalpy exceeds 28 Btu/lb of dry airbor Outdoor air temperature exceeds 75°F
aOnly the high limit control devices listed are allowed to be used and at the setpoints listed. Others such as Dew Point, Fixed
Enthalpy, Electronic Enthalpy, and Differential Enthalpy Controls, may not be used in any climate zone for compliance with
Section 140.4(e)1 unless approval for use is provided by the Energy Commission Executive Director.
bAt altitudes substantially different than sea level, the Fixed Enthalpy limit value shall be set to the enthalpy value at 75°F and
50% relative humidity. As an example, at approximately 6,000 foot elevation, the xed enthalpy limit is approximately 30.7 Btu/lb.

16
Table 7 - Single Enthalpy and Dual Enthalpy High Limit Curves
Enthalpy Settings (Enthalpy Optional)
If installing the optional enthalpy sensor. The ECD-SRT**TA-D2
(CORRECT?) dry bulb outside air sensor must rst be removed.
Wire enthalpy to S-BUS connections on W7220 controller thru (2)
gray wires.
When the OA temperature, enthalpy and dew point are below the
respective setpoints, the Outdoor Air can be used for economizing.
Fig. 15 shows the new single enthalpy boundaries in the W7220.
There are 5 boundaries (setpoints ES1 thru ES5), which are dened
by dry bulb temperature, enthalpy and dew point.
Refer to Table 11 for ENTH CURVE setpoint values.
To use enthalpy the W7220 must have a enthalpy control sensor
for OA. The W7220 calculates the enthalpy and dewpoint using the
OA temperature and humidity input from the OA sensor. When the
OA temperature, OA humidity and OA dew point are all below the
selected boundary, the economizer sets the economizing mode to
YES, economizing is available.
When all of the OA conditions are above the selected boundary, the
conditions are not good to economize and the mode is set to NO.
If using OA enthalpy sensor option, remove and discard the dry
bulb sensor shipped with the economizer. System default is ES3
enthalpy curve.
Fig. 15 shows the 5 current boundaries. There is also a high limit
boundary for differential enthalpy. The high limit boundary is ES1
when there are no stages of mechanical cooling energized and HL
(high limit) when a compressor stage is energized.
Table 10 provided the values for each boundary limit.
Enthalpy control Sensor Conguration
The optional Enthalpy Control sensor (Part Number:
communicates with the W7220 Economizer controller on the two-
wire communications bus and can either be wired using a two
pin header or using a side connector. This sensor is used for OA
enthalpy, and return (differential dry bulb or enthalpy), depending
on how its three position DIP switch is set.
Use Fig. 17 to locate the wiring terminals for each Enthalpy Control
sensor.
Use Fig. 17 and Table 9 to set the DIP switches for the desired use
of the sensor.
If using differential (return) enthalpy or temperature option, see
Table 4 for California Title 24 setting requirements by region.
Enthalpy
Curve
Temp.
Dry Bulb (oF)
Temp.
Dewpoint (oF)
Enthalpy
(btu/lb/da)
Point P1 Point P2
Temp (oF) Humidity %RH Temp (oF) Humidity
%RH
ES1 80.0 60.0 28.0 80.0 36.8 66.3 80.1
ES2 75.0 57.0 26.0 75.0 39.6 63.3 80.0
ES3 70.0 54.0 24.0 70.0 42.3 59.7 81.4
ES4 65.0 51.0 22.0 65.0 44.8 55.7 84.2
ES5 60.0 48.0 20.0 60.0 46.9 51.3 88.5
HL 86.0 66.0 32.4 86.0 38.9 72.4 80.3
Fig. 17 - C7400S Sensor (Used as OA Enthalpy
and Return (Differential) Dry Bulb or Enthalpy)
Table 8 - Sensor Wiring Terminationsa
Table 9 - Enthalpy Control Sensor DIP Switch
Terminal Type Description
Nbr Label
1S─BUS S─BUS S─Bus Communications
(Enthalpy Control Sensor Bus)
2S─BUS S─BUS S─Bus Communications
(Enthalpy Control Sensor Bus)
Use DIP Switch Positions for Switches 1,2, & 3
1 2 3
DAaOFF ON OFF
RAbON OFF OFF
OAcOFF OFF OFF
a DA = Discharge Air or Supply Sensor
b RA = Return Air
c OA = Outside Air

17
OPERATION
Cooling, Unit with Ultra Low Leak Economizer
For Occupied mode operation of Ultra Low Leak Economizer, here
must be a 24-v signal at terminals R and OCC (provided through
PL6-3 from the unit’s IFC coil). Removing the signal at OCC places
the Ultra Low Leak Economizer control in Unoccupied mode.
During Occupied mode operation, indoor fan operation will be
accompanied by economizer dampers moving to Minimum Position
setpoint for ventilation. If indoor fan is off, dampers will close.
During Unoccupied mode operation, dampers will remain closed
unless a Cooling (by free cooling) or DCV demand is received.
When free cooling using outside air is not available, the unit cooling
sequence will be controlled directly by the space thermostat.
Outside air damper position will be closed or Minimum Position as
determined by Occupancy mode and fan signal.
When free cooling is available as determined by the appropriate
changeover command (dry bulb, outdoor enthalpy, differential
dry bulb or differential enthalpy), a call for cooling (Y1 closes at
the thermostat) will cause the economizer control to modulate
the dampers open and closed to maintain the unit supply air
temperature. Default supply temperature is 53°F, with a range of
38°F to 70°F. Compressor will not run.
Should 100% outside air not be capable of satisfying the space
temperature, space temperature will rise until Y2 is closed. The
economizer control will call for compressor operation. Dampers will
modulate to maintain SAT at setpoint concurrent with Compressor
1 operation. The “Low T Temp” setting (default 32°F) will lock out
compressor operation.
When space temperature demand is satised (thermostat Y1
opens), the dampers will return to Minimum Damper position if
indoor fan is running or fully closed if fan is off.
If accessory power exhaust is installed, the power exhaust fan
motors will be energized by the economizer control as the dampers
open above the EXH1 SET setpoint and will be-energized as the
dampers close below the EXH1 SET setpoint.
Damper movement from full closed to full open (or vice versa) will
take between 1-1/2 and 2-1/2 minutes.
Heating with Ultra Low Leak Economizer
During Occupied mode operation, indoor fan operation will be
accompanied by economizer dampers moving to Minimum Position
setpoint for ventilation. If indoor fan is off, dampers will close.
During Unoccupied mode operation, dampers will remain closed
unless a DCV demand is received.
When the room temperature calls for heat (W1 closes), the heating
controls are energized.
Demand Controlled Ventilation
If a eld-installed CO2sensor is connected to the Ultra Low Leak
Economizer control, a Demand controlled Ventilation strategy will
operate automatically. As the CO2level in the space increases
above the setpoint, the minimum position of the dampers will be
increased proportionally, until the Maximum Ventilation setting is
reached. As the space CO2level decreases because of the increase
in fresh air, the outdoor damper will follow the higher demand
condition from the DCV mode or from the free cooling mode.
DCV operation is available in Occupied and Unoccupied periods
with Ultra Low Leak Economizer. However, a control modication
will be required on the units to implement the Unoccupied period
function.
Table 10 - Damper Position Control, 2-Speed Fan Motor, Economizer Cooling Not Available
INPUT
OCC 0 - V 24 - V 24 - V 24 - V 24 - V
Y1 0 - V 0 - V 24 - V 24 - V 0 - V
Y2 0 - V 0 - V 0 - V 24 - V 0 - V
W1 0 - V 0 - V 0 - V 0 - V 24 - V
SUPPLY FAN
MOTOR SPEED OFF LOW LOW HIGH HIGH
DAMPER POSITION
NO CI2 SENSOR CLOSED MIN POS MIN POS MIN POS MIN POS
W/ CO2 SENSOR CLOSED
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN L
TO
VENTMAX L
FROM
VENTMIN H
TO
VENTMAX H
FROM
VENTMIN H
TO
VENTMAX H

18
TROUBLESHOOTING
Power Loss (Outage or Brownout)
All setpoints and advanced settings are restored after any power
loss or interruption, as all settings are stored in the Economizer
controller’s non-volatile ash memory.
NOTE If the power goes below 18 Vac, the W7220 controller
module assumes a power loss and the 5 minute power up delay
will become functional when power returns above 18 Vac.
Alarms
The Economizer module provides alarm messages that display on
the 2-line LCD
NOTE: Upon power up, the module waits several seconds before
checking for alarms. This allows time for all the congured devices
(e.g. sensors, actuator) to become operational.
If one or more alarms are present and there has been no keypad
activity for at least 5 minutes, the Alarms menu displays and cycles
through the active alarms.
You can also navigate to the Alarms menus at any time.
See Table 3 for the Alarms menu.
Clearing Alarms
Once the alarm has been identied and the cause has been
removed (e.g. replaced faulty sensor). The can be cleared from
the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the button.
3. ERASE? displays.
4. Press the button.
5. ALARM ERASED displays.
6. Press the ↑ (Menu up/Exit) button to complete the action
and return to the previous menu.
NOTE: If the alarm still exists after you clear it, it is redisplayed
within 5 seconds.
Table 11 - Operating Issues and Concerns
Issue or Concern Possible Cause and Remedy
My outdoor temperature reading on the
STATUS menu is not accurate
Check the sensor wiring:
• Enthalpy sensors are to be wired to the S-Bus terminals.
• Temperature sensors are to be wired to the OAT and MAT terminals.
If my enthalpy sensor drifts in accuracy
over time, can I re-calibrate it?
The sensor is not able to be re-calibrated in the eld. However there is a menu
item under the ADVANCED menu where you are able to input a limited off set in
temperature and humidity for each sensor you have connected to the economizer.
Can I go back to factory defaults and
start over?
Under the SYSTEM SETUP menu you can change the setpoints to the factory
defaults.
Will I be able to see the LCD screen
when it is in the unit?
The LCD screen has a backlight that is always illuminated.
What is a good setpoint for the Mixed Air
Temperature (MAT)?
The mixed are temperature is the temperature of air that you want to supply to the
space. In a commercial building, this is between 50 to 55oF (10 to 13oC). The mixed
are is the mixing of the return air and the outdoor air.
I am using enthalpy sensors. Why did
the control ask me to input a dry bulb
changeover temperature?
In the even the humidity sensor in the enthalpy sensors fails, the backup algorithm in
the control is to default to the temperature sensor in the enthalpy sensor.
In checkout, the outdoor damper closes
when I command it to open.
Check the actuator linkage or rotation. In the CHECKOUT mode, the outdoor damper
should drive open or closed with the return air damper having the opposite effect.
How do I set my minimum position? The minimum position is set using the VENTMIN and VENTMAX setup in the
SETPOINTS menu. VENTMIN is the minimum ventilation required when using an
occupancy sensor and VENTMAX is the minimum ventilation when not using an
occupancy sensor for Demand Control Ventilation. The VENTMAX position is set the
dame as with the potentiometer on the analog economizers and is the output voltage
to the damper actuator. The range is 2 Vdc closed OA damper and 10 Vdc open OA
damper.
What if my damper does not go com-
pletely closed in the checkout operation?
Check the damper linkage or hub to make sure the damper is able to close
completely.
How do I set the OCC? There are two setting for the OCC setting, INPUT and ALWAYS, INPUT is from the
space thermostat, if it has an occupancy output. ALWAYS is the unit in the occupied
mode, if the economizer is powered (fan on).
Does the economizer save my program
values if the unit loses power?
Yes, once the changes are stored in the controller they will be stored until they are
changed by the operator.
If the unit is left in checkout, how long
will the unit stay in checkout mode with-
out input?
The unit will remain in checkout for 10 minutes, then return to normal operation.
Manufacturer reserves the right to discontinue, or change at any time, specications, designs and prices without notice and without incurring obligations.
Form No. 18349-2P-A / JCI Form No. 1135765 Copyright MicroMetl Corporation 2014. All rights reserved.
MicroMetl Indianapolis
3035 N. Shadeland Ave., Suite 300
Indianapolis, IN 46226
1.800.MMC.HVAC (EST)
[email protected]
MicroMetl Sparks
905 Southern Way
Sparks, NV 89431
1.800.884.4662 (PST)
[email protected]
MicroMetl Longview
201 Kodak Blvd.
Longview, TX 75602
1.903.248.4800 (CST)
[email protected]