INSTALLATION INSTRUCTION INSTALLATION INSTRUCTIONS FOR 559375

INSTALLATION INSTRUCTION INSTALLATION INSTRUCTIONS FOR 559375
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
137D-0209
I - SHIPPING AND PACKING LIST
Package 1 of 1 contains:
ENTHALPY SENSOR
1 - Economizer Assembly
1 - Fresh Air Hood w/ Filter
1 - Control Package
1 - Barometric Relief Hood
1 - Filter Access Panel
2 - Wire Nut (For Mixed Air Sensor)
6 - #10 x ½ x 16 Hex Tec
DAMPER MOTOR
Check contents for shipping damage. Contact the last carrier
immediately if any shipping damage is found.
II - APPLICATION
CONTROL PACKAGE (STEP 3)
FIGURE 1
Economizers are used with 6 and 7 ½ ton P6SP/R6GP units for automatic sensor-controlled introduction of outdoor air
into the system through an electro-mechanically controlled damper.
Economizer slides into horizontal return air opening. Mixed air sensor, TB11, and enthalpy control board relay are shipped
in economizer and must be relocated to filter section. Intake and exhaust hoods are packaged with economizers and
installed according to instructions provided.
III - INSTALLATION
1. Disconnect all power to unit.
2. Cut and discard wire tie securing wire bundle to the damper motor
Important - DO NOT cut other wires. Inspect for damaged connections or loose wires.
3. Remove box of controls to be installed over the assembly containing the logic control board and mixed air sensor. See
Figure 1.
4. Remove from box the logic control board and wire bundle. Cut wire tie securing the bundle of wires to logic control
board and mixed air sensor.
5. Locate S1, unit economizer connection and remove the installed dummy plug. See Figure 3.
6. Connect economizer jack S2 to economizer plug P2 on the economizer assembly.
7. Route wiring to the right side of the economizer and slide into the unit. Position the mixed air sensor and control board
in the filter section routing wiring along right side of the horizontal return air section. Insert economizer side flanges into
the unit standing seams. Using existing screws from bottom of discarded panel to secure economizer bottom flange to
unit. See Figure 2.
MULLIONS
INSERT THE SIDE FLANGES INTO
THE UNIT STANDING SEAMS
RETURN AIR OPENING
FIGURE 2
1
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
INSTALLATION
INSTRUCTION
8. Position logic control board in filter access area as
shown in Figure 3. Secure control board with two
#10-16 x ½ screws.
TB11 BOARD AND LOGIC CONTROL
MIXED AIR SENSOR
9. Insert mixed air sensor tube through the mounting
hole into the supply air compartment. Secure using
two #10-16 x ½ screws. See Figure 3.
S1 UNIT JACK
FILTERS
10. Connect economizer plug P1 to unit jack S1 on units
economizer control panel.
INTAKE AIR
ENTHALPY SENSOR
EXHAUST AIR
DAMPER MOTOR
FIGURE 3
DOWN FLOW APPLICATION
11. Install barometric relief hood in front
of exhaust air opening.
FILTER ACCESS
13. Slide filter access panel underneath
top of unit and secure to mullions.
FRESH AIR HOOD
14. Restore power to unit and check for
proper damper operation (See
System Check section).
BAROMETRIC
RELIEF HOOD
FIGURE 4
NOTE:
12. Install fresh air hood in front of intake
opening.
SCREW TO SIDE MULLIONS
HORIZONTAL APPLICATION
FOR THIS APPLICATION THE 547872
OR 920604 KITS ARE REQUIRED.
SUPPLY DUCT
FILTER ACCESS
11. Install barometric relief hood to
return duct over the opening in
duct.
12. Install fresh air hood in front of
intake opening.
1 3 . S l i d e f il t e r a c c e s s p a n e l
underneath top of unit and
secure to mullions.
14. Restore power to unit and check
for proper damper operation
(See System Check section).
FRESH AIR HOOD
RETURN DUCT
FIGURE 5
2
CUT HOLE
31 x 12
BAROMETRIC RELIEF HOOD
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
Figure 6
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.
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.
Setting the Outdoor Enthalpy Changeover
Point
The enthalpy control senses both temperature and
humidity or the heat content of the outside air. It controls
the amount of outdoor air brought into the system. When
the heat content of the outside air is below control setpoint,
the control modulates outdoor dampers to meet cooling
needs of the building. When the heat content rises above
control setpoint, the control closes outdoor dampers to
minimum position. The recommended setpoint is “A”. If
Economizer is allowing air which is too warm or too humid
to enter the system, control may be changed to a lower
setpoint (B, C, or D). Refer to Figure 6.
B. Heating Mode
1. On a call for heat damper will open to the minimum
vent position only.
3
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
C7046C Air Temperature Sensors
resistance versus temperature.
Approximate dimensions of C7046C Air Temperature Sensor in in. (mm).
C7400A Sensor output current
vs. relative humidity
4
Approximate dimensions of C7400A Solid State Enthalpy Sensor
C7650A Solid State Temperature Sensor in in. (mm)
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
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
Proper Response
1. a. Disconnect power at TR and TR1.
----
b. Disconnect Jumper P to P1.
c. Jumper TR to 1.
d. Jumper T1 to T.
Figure 7 - M7415A
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.
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
Return Air
Temperature
x
% of
Return Air
+
Outside Air
Temperature
Figure 8 - W7459A
x
% of
Outside Air
=
Temperature
of Mixed Air
Formula for Adjusting the Minimum Position Control
For design requirements for CFM per person for all building types, refer to ASHRAE standard 62.1 section 6 and/or local or
state building codes.
5
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
Adjusting Minimum Damper Position
The minimum position potentiometer keeps outdoor air
damper from closing completely during system operation
to provide ventilation.
Minimum Position Adjustment
W7459A
1. Disconnect mixed air sensor from terminals T and T1.
2. Make sure either factory-installed jumper is in place
across terminals P and P1 or if remote damper
positioner is required, that it is wired according to
Figure 9 and turned fully clockwise.
3. Connect 24 Vac across terminals TR and TR1.
4.
Adjust potentiometer on face of W7459 with
screwdriver to desired minimum position.
Optional Applications
Remote Minimum Position Control
Remote control of outdoor air dampers is desirable when
potential exists for temporary additional ventilation. The
potentiometer in W7459 controls damper minimum
p o s i t i o n . Ad d i n g S 9 6 3 B 1 1 2 8 R e m o te M a n u a l
Potentiometer allows occupants to open dampers beyond
minimum position for additional ventilation. Connect
potentiometer as shown in Figure 9.
This chart can also be used for measuring the percentage
of outside air on an air handler. The same three
temperatures are measured per the formulas on the
preceding page. Lines are drawn on the chart using a ruler.
As with the formulas this chart is most effective if there is at
least a 10 degree F difference between the return and
outside air. This will typically require either a warm or cold
day rather than moderate weather. It is more accurate to
measure outside air percentage on a day when the outside
temperature is 10°F (-12°C) rather than on a day when it is
70°F (21°C). If the temperature difference between the
return and outside air is only a few degrees, a small error in
measurements can alter the results by as much as 50%
using this method. If the temperature difference is 40 or
50°F (22 or 28°C) small errors in measurement do not
substantially affect the results of the calculations. A full
size chart is provided on the last page of these
instructions.
For detailed instructions on the use of this
chart, refer to Honeywell publication #
63-8597, Honeywell Economizers. Pages
12-13.
MAINTENANCE
1. Damper motor is prelubricated and does not require
further lubrication.
Figure 9
S963B1128 Remote Minimum Position Potentiometer
used with W7459 for remote damper control.
2. Make visual inspection of dampers and linkage
assemblies during routine maintenance.
3. Filters should be checked periodically and cleaned
when necessary. At least on a quarterly schedule.
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.
6. If filter must be replaced, filter of like kind and size must
be used. DO NOT replace permanent filters with
throwaway type filters.
6
HARNESS ENDS AT
(P1) ECONOMIZER
PLUG
Mixed Air Sensor
Fresh Air Sensor
Damper Actuator 24V
Plug/Cap Economizer
Plug/Cap Economizer
Terminal Board
Logic Module
BLK
BLU
BRN
GRN
ORN
RED
VIO
WHT
YEL
See Unit Wiring Diagram for Connections at S1
Change
Changed Note 1
Date
11/20/08
Date: January 27, 2009
Supercedes:
Drawn by: MGL
Unit #: 47-314-07C
Diagram#: 4731407CW
Approved by:
Modulating Downflow Economizer
P6-R6 072-090
A
Revision
Rooftop Systems, Inc.
2405 McIver Lane
Carrollton, Texas 75006
Phone (972) 247-7447
Fax
(972) 243-0940
Black
Blue
Brown
Green
Orange
Red
Violet
White
Yellow
WIRE COLOR CODE
CONNECTOR & CONTACT CONFIGURATION
P1/P2 - (303908/303903) PLUG & (303912) PIN
S2 - (303904) CAP & (303913) SOCKET
C7046C
C7400A
M7415A
P1/S1
P2/S2
TB-11
W7459A
COMPONENT CODE
Notes:
1. Connection at P1 terminal 2:
"R" units: Yellow side of gas valve
"P" units: "W" on A/C unit
"Q" units: "O" on indoor thermostat sub-base.
2. Y2 must be energized for the compressor to operate during economizer operation.
3. Refer to economizer Instructions, Page 6, for Heatpump changes.
E# = 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
HARNESS DETAIL
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559375
ECONOMIZERS USED WITH P6/R6 072-090 UNITS
Outside Air Percentage Chart
JANUARY 30, 2009
NEIEC07C
8
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