In stal la tion In struc tions Downflow Unit Warn ing:

In stal la tion  In struc tions Downflow Unit Warn ing:
Package Unit Modulating Economizer
Installation Instructions
Downflow Unit
Warning:
Recognize this symbol as an indication of Important Safety Information!
Read all instructions prior to installation.
Disconnect electrical power to the unit before servicing.
Failure to do so can cause electrical shock resulting in personal injury or death.
Improper installation, adjustment, alteration, service or maintenance can cause injury
or property damage. Refer to this manual. For assistance or additional information
consult a qualified installer or service agency.
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
INSTALLATION
INSTRUCTION
FORM# 136D-0312 (Replaces 136D-1008)
Note:
Reference Unit Technical Service Literature for application requirements.
Step 1:
Inspect economizer for shipping damage and correct parts with
list below.
UPPER PANEL 3
1
3
1
1
1
-
Economizer Assembly w/ Filter installed
Upper Adaptor Panels
Side Adaptor Panel
Outdoor Air Hood (Attached to Economizer)
Hardware Package
1 - Wiring Diagram Sticker
1 - Mixed Air Sensor (MAS)
2 - 29" Extension Wires for Mixed Air Sensor
3 - 6" Wire Tie
3 - #10 x 16 x ½" Self-Tapping Screws
10 - #10 x 16 x ½" Type A Screws
1 - .875 Bushing Shutter
UPPER PANEL 2
UPPER PANEL 1
Note: For rooftop or other installations that requires the
economizer to be lifted or hoisted, always lift
economizer with the supplied packaging in place to
prevent damage from lifting and rigging equipment.
SIDE PANEL
Shipping Information
1
Height
Length
Width
Weight
35"
57 ½"
20 ½"
118
HARDWARE PACKAGE
INSTALLATION
INSTRUCTION
UNIT HEIGHT
(WITH BASERAILS)*
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
BLOWER
UPPER PANEL
CLOSE-OFF
39"
PANEL 1 - 22" x 7"
43"
PANEL 2 - 22" x 11"
UNIT ELECTRICAL
ACCESS PANEL
47"
PANEL 3 - 22" x 15"
* Note: Reference unit installation instructions for
unit height and other dimensional data.
UPPER PANEL
ECONOMIZER TOP PAN
UNIT ECONOMIZER
PLUG LOCATION
CONTROL
ACCESS PANEL
RETURN ACCESS PANEL
SIDE PANEL
FILTER ACCESS PANEL
Step 2:
Shutdown unit and disconnect from electrical power.
Step 3:
Remove the return access panel and the unit electrical access panel. (Save screws.)
Step 4:
Using Caution to not puncture coil tubing, install side panel on unit.
Step 5:
Take the tab on side panel and place on the return side of divider wall and secure with self-tapping screw provided.
Step 6:
Remove unit filter rack (if installed) and filters.
Step 7:
Locate economizer plug in unit return air compartment (top right corner). Loosen/cut any zip ties that restrict its movement
and prepare it for connection to the economizer.
Step 7a:
(If necessary) install differential enthalpy control in return air duct.
Step 8:
Remove filter from economizer to prevent damage during installation. (Accessed through lower, barometric hood panel.)
Step 9:
Install economizer in unit and attach only with left and right side mounting screws. Ensure economizer rails sit flush on
return air opening lip. Use Caution to not tear insulation on unit side wall or floor. Use screws that were removed in Step 3.
Step 10:
Remove economizer top pan (4 screws) and connect economizer harness to unit wiring harness. Inspect all wiring and
linkage connections for security and proper operation.
2
INSTALLATION
INSTRUCTION
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
Step10a:
If installed make sure differential enthalpy wiring connections
are made in accordance with that kits instructions. Ensure that
wires are protected from all sharp edges, inadvertent grounding
and will not become entangled with filter or movable vanes.
Step11:
Remove unit blower access panel and install mixed air sensor in
appropriate location (as shown in Figure) with two self tapping
screws and then make electrical connection. Replace blower
access panel.
MIXED AIR SENSOR
LOCATION 1
Note: Some older units are equipped for mixed air sensor
location 1 installation for these units, if desired, the
mixed air sensor can be installed in location 2 for
optional performance. See Next Page for more
information.
SCREW TO SECURE
Step 12:
Replace economizer top pan and install side panel and
appropriate upper close-off panel. Replace economizer filter
and filter access panel. Ensure all mounting screws, panels,
and doors are installed.
MIXED AIR SENSOR
LOCATION 2
Step 13:
Minimum Fresh Air Damper Position Adjustment
Damper minimum position keeps the outdoor air damper from closing completely during system operation for ventilation
of building contaminants and people occupancy. Consult your State or local codes as required.
1.
2.
3.
4.
5.
6.
Ensure main power to outdoor unit is disconnected.
Set thermostat “SYSTEM” switch to “OFF” position and “FAN” switch to “AUTO”.
Install jumper wire across unit low voltage terminal board “R” and “G” terminal.
Disconnect mixed air sensor from the W7459A terminals T and T1 and short terminals T and T1.
Ensure the factory installed jumper is in place across W7459A terminals P and P1.
Calculate the appropriate mixed air temperature per the following equation:
* (Return Air Temp. x % of Return Air) + (Outside Air Temp. x % of Outside Air) = Mixed Air Temperature
Example: Assume local code requires 10% outdoor air during occupied conditions, (200 CFM of total unit CFM = 2,000)
outdoor air is 50 Deg. F, and return air is 75 Deg. F.
Under these conditions, what is the mixed air temperature in the supply duct?
* (50 Deg. F x 0.1) + (75 Deg. F x 0.9) = 5.0 Deg. F + 67.5 Deg. F = 72.5 Deg. F
7. Restore power to the outdoor section.
8. Carefully adjust the MIN POS potentiometer on the W7459A control module (See Figure 3) with a small
screwdriver until the mixed air temperature reaches the calculated value. Ensure both sets of damper
blades operate properly.
9. Once minimum position adjustments are completed, turn off power to the outdoor unit. Damper will move to
fully close.
10. Remove jumper wire across “R” and “G” on unit low voltage terminal board and T and T1 on the W7459A control
module.
11. Reconnect the mixed air sensor across W7459A terminals T and T1.
Step 14:
Double check all electrical connections and make desired enthalpy settings.
See Page 7. C - Outdoor Enthalpy Changeover Setpoint along with Figures 1 and 3.
Step 15:
Return power to the unit.
3
INSTALLATION
INSTRUCTION
Mixed-Air Sensor Installation Instructions
For Gas Heat Models:
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
UNIT MIXED AIR
SENSOR WIRES
Step A:
Remove Blower Door and unit supply duct-cap
assembly if necessary.
Step B:
Locate Unit mixed-air sensor wires. Connect
economizer mixed air sensor wires supplied in parts
bag.
MIXED AIR SENSOR
WIRE ROUTING
LOCATION
Step C:
Locate and remove plastic plug in wire routing location
in blower shelf. Install supplied star-bushing and route
wires through bushing
Step D:
Install mixed air sensor with supplied self-tapping
screw to duct lip through the hole in the flange of the
sensor bracket.
HORIZONTAL
SUPPLY CLOSE
OFF COVER
Locate the sensor approximately 3" to 6" inches from
corner of supply opening, while ensuring that the wires
will reach the sensor.
Note: See picture for mixed air sensor locations
for Gas Heat Units. For Electric Heat
applications refer to the instruction on next
page.
DUCT-CAP ASSEMBLY
Step E:
Connect sensor wires to mixed air sensor, ensure that
connections are tight, wires are protected from sharp
edges and cannot become entangled by rotating
equipment. Secure wires with zip-ties as necessary.
Step F:
Go back to step 12 of installation instructions and
complete economizer installation steps.
Note: Some older units may not have the wire
routing hole located in blower shelf. For these
units it is recommended to create the wire
routing hole as instructed below to locate the
mixed air sensor as described above for
optimum economizer performance but the
mixed air sensor can be mounted in location 1
(see figure, previous page) if desired.
ALTERNATE MIXED AIR
SENSOR LOCATION
(GAS HEAT MODELS)
3" TO 6" FROM CORNER
Do not, under any circumstances, route wires
around any sheet metal edges.
Creating Wire Routing hole:
Measuring 1 ½" from both the bottom right flange of the
blower shelf and exposed edge of the blower shelf,
(see picture to right) mark hole location. Drill pilot hole
and punch hole with 78" sheet-metal hole punch.
Alternately drill hole to 78" with sheet metal "step-bit".
De-bur hole diameter and install 78" star-bushing.
Route wires and mount sensor as described above.
4
INSTALLATION
INSTRUCTION
Mixed-Air Sensor Installation Instructions
For Electric Heat Models:
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
UNIT MIXED AIR
SENSOR WIRES
Step A:
Remove Blower Door and unit supply duct-cap
assembly if necessary. (Access to duct-cap assembly
is performed through horizontal supply close-off
cover.)
MIXED AIR SENSOR
MOUNTING
LOCATION
Step B:
Locate Unit mixed-air sensor wires. Connect
economizer mixed air sensor wires supplied in parts
bag.
Step C:
Install mixed air sensor with supplied self-tapping
screw to blower shelf through the hole in the flange of
the sensor bracket.
Locate the sensor with approximately 6" inches of
clearance from any obstruction, while ensuring that
the wires will reach the sensor.
HORIZONTAL
SUPPLY CLOSE
OFF COVER
Note: See picture for mixed air sensor location for
Electric Heat Units. For Gas Heat applications
refer to the instruction on previous page.
Step D:
Connect sensor wires to mixed air sensor, ensure that
connections are tight, wires are protected from sharp
edges and cannot become entangled by rotating
equipment. Secure wires with zip-ties as necessary.
Step E:
Go back to step 12 of installation instructions and
complete economizer installation steps.
5
ELECTRIC HEAT KIT
MOUNTING LOCATION
INSTALLATION
INSTRUCTION
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
RETURN FILTER REPLACEMENT (16 x 20 x 1)
Step 1:
Remove 2 screws on filter access panel on barometric
relief hood.
USE HOLE WITH BUSHINGS
Step 2:
Lift blade to allow filter to be removed
Step 3:
Slide filter out through hood and replace with new filter.
Step 4:
Replace top of hood and secure with screws.
(See pictures below and to the right)
REMOVE FOR FILTER ACCESS
REMOVE TWO SCREWS TO
REMOVE TOP OF HOOD
Notes for use with heat pumps
Economizer Configuration Instructions for use with O/B
configurable thermostats with Heat pumps
When this economizer is used in conjunction with a heat
pump, special attention must be given to the thermostat.
Some newer digital thermostats only allow a single choice of
an "O" or "B" signal. When configuring this economizer for
use with one of these thermostats, the thermostat must be
configured to provide an "O" signal to ensure proper
operation of the reversing valve. Additionally the
economizers relay must be reconfigured to account for the
loss of the "B" signal. To do this, reverse the connections of
the white and yellow wires on relay terminal numbers 1 and 4.
Then reverse the green and grey wires at the relay terminal
numbers 3 and 6. Ensure that all connections are secure and
follow the regular installation instructions for all other
operations. (See diagram to the right.)
Note: Some unit wiring diagrams may still show the "B"
input signal to the unit. On these systems, connect the
applicable wires to the thermostats "O" signal.
6
INSTALLATION
INSTRUCTION
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
OPERATION
A. Cooling Mode
1. On a call for cooling, with ambient temperature and
humidity above enthalpy control setpoint, damper
will open to minimum vent position only.
2. On a call for cooling, with ambient temperature and
humidity suitable for cooling, enthalpy control will
shift stage one control to outside air and shift stage
two thermostat to first stage compressor. Damper
will modulate to control supply air temperature at
55°F (13°C). If additional cooling is required,
compressor one may be energized through second
stage of thermostat.
B. Heating Mode
1. On a call for heat damper will open to the minimum
vent position only.
C. Outdoor Enthalpy Changeover Setpoint
The outdoor enthalpy changeover setpoint is used to
return the outdoor air damper to minimum position
when enthalpy rises above setpoint. Enthalpy setpoint
scale markings located on W7459, are A, B, C and D;
See Figure 1 for corresponding control point. The
factory-installed 620 ohm jumper must be in place
across terminals SR and +.
SETTINGS AND ADJUSTMENTS
Potentiometers with screwdriver adjustment slots,
located on the face of the W7459 economizer control
device, provide adjustments for the minimum damper
Figure 1
C7150B Air Temperature Sensors
resistance versus temperature.
7
C7400A Sensor output current
vs. relative humidity
DOWNFLOW ECONOMIZER # 558870
PACKAGE EQUIPMENT MODELS
*R6G(D,F) 024*–060* / *R8GD 036*-060*
*P6SD 024*-060* / *Q6SD 024*-060*
INSTALLATION
INSTRUCTION
CHECKOUT AND TROUBLESHOOTING
DAMPER ACTUATOR
Check the W7459 for proper operation. Table 1 describe how to
simulate various environmental conditions. Make necessary minor
adjustments to the minimum position until desired operation is
obtained.
If the economizer system does not operate properly, check individual
components of the system according to the instructions provided with
each device.
If the other components operate properly when disconnected from the
W7459, but the system (as a whole) does not, replace the W7459.
Checkout Procedure
1. a. Disconnect power at TR and TR1.
Proper Response
----
b. Disconnect Jumper P to P1.
c. Jumper TR to 1.
d. Jumper T1 to T.
e. If con nected, re move C7400 Solid State LED is off.
Enthalpy Sensor from terminals SO and +.
Ensure factory-installed 620 ohm resistor is
connected to terminals SR and +.
f. Apply power (24 Vac) to terminals TR and TR1.
Figure 2
Motor is in closed position.
2. a. Disconnect factory-installed 620 ohm resistor LED turns on (A model only, for D model,
from terminals SR and +.
go to step 3).
Motor drives toward open.
3. a. To simulate high and low enthalpy (single ---enthalpy sensor), reconnect factory- installed
620 ohm resistor from terminals SR and +.
Connect 1.2K ohm 4074EJM Checkout
Resistor across terminals SO and +
b. Turn enthalpy setpoint potentiometer to "A".
LED turns on, indicating low enthalpy.
Motor drives toward open.
c. Turn enthalpy setpoint potentiometer to "D".
LED turns on, indicating high enthalpy.
Motor drives toward closed.
d. Disconnect the 1.2K ohm checkout resistor.
----
4. a. To verify sensor operation, reconnect the + lead ---of outdoor enthalpy sensor to the + terminal of
W7459
b. Connect a DC milliammeter between terminal
SO of the W7459A and terminal S of the
enthalpy sensor. (Positive meter lead to
terminal S of the enthalpy sensor.)
Milliammeter indication is between 3 and
25 mA if sensor is operating properly.
If milliammeter indicates zero, the sensor
may be wired backwards.
c. When using differential enthalpy, check the
return air enthalpy sensor by connecting a DC
milliammeter between terminal S R of the
W7459A and terminal S of the return air
enthalpy sensor. (Positive meter lead to
terminal S of the enthalpy sensor.)
Milliammeter indication is between 3 and
25 mA if sensor is operating properly.
If milliammeter indicates zero, the sensor
may be wired backwards
Figure 3
MAINTENANCE
1. Damper motor is prelubricated and does not require further
lubrication.
2. Make visual inspection of dampers and linkage assemblies during
routine maintenance.
3.
Filters should be checked periodically and cleaned when
necessary.
4. The washable filters supplied with the economizer can be cleaned
with water and a mild detergent.
5. Take note of "Air Flow Direction" marking on filter frame when
reinstalling.
SUPERSEDES 03-07-12
MARCH 14, 2012
Approximate dimensions of C7150B Mixed/
Discharge Air Sensor in in. (mm).
NEIEC06D
8
HARNESS DETAIL
CE# = WIRE END DESIGNATION
E2 STUD #6 18 Ga. Wire
E3 Female ¼ Quick Disc.
E4 Male ¼ Quick Disc. Insul
E6 Wire Nut Size 73B
E7 Raw End
E8 Female 316 Quick Disc.
COMPONENT CODE
HARNESS
ENDS AT P1
C7150C
C7400A
M7415A
P1
S1
TB-11
W7459A
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24v
Economizer Plug
Unit Plug
Terminal Board
Logic Module
WIRE COLOR CODE
BLK
BLU
GRN
GRY
ORN
RED
VIO
WHT
YEL
Notes:
1. S1–Pin 2 connection is:
a. connected to "Yellow" side of gas valve on package gas/electric units.
b. connected to "W" low voltage terminal on package air conditioning units.
c. connected to “O” thermostat terminal on package heat pump units.
See “Notes for Use with Heat Pumps”, Page 6, for required economizer wiring changes.
2. For mechanical cooling (compressor) to energize during economizer cooling mode of operation, a thermostat
"Y2" call must be present. A 2 stage cooling thermostat is required for this application.
See Unit Wiring Diagram for Connections
Black
Blue
Green
Gray
Orange
Red
Violet
White
Yellow
Revision
Change
Date
A
Added notes to drawing
03-07-12
B
Changed Note 1
03-14-12
Modulating Downflow Economizer
Date: March 14, 2012
Supercedes: 03-07-12
Drawn by: MGL
Unit #: 47-314-06D
Diagram#: 4731406DW
Approved by:
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