Installer's
Guide
Customer Propety: Contains
wiring and service information. Please retain.
DMPR-IN-28F
18-HE60D26-5
Library
Service Literature
Product Section
Unitary
Product
Model
Unitary Accessories
Econs, Dmprs, Motors, Low Ambient
Literature Type
Installer's Guide
Sequence
28F
Date
File No.
June 1999
SV-UN-ACC-DMPR-IN-28F 06/99
Supersedes
Models :
Used With:
BAYDMPR029C TCD036-300
TCH048-300
YCD036-300
YCH048-300
WCD036-240
WCH048-240
DMPR-IN-28E
0-25 % Manual Fresh
Air Hood
General Information
The manual fresh air adjustment panel with the hood is designed to provide up to 25 percent outside air. Once the adjustable panel is set and the hood is installed, they will allow a fixed quantity of outside air to be introduced into the
conditioned space.
Shipping Inspection
Visually inspect for shipping damage when it arrives. If
damage is evident, file a claim with the carrier immediately.
Specify the type and extent of the damage on the "bill of
lading" before signing.
Inspect the components for concealed damage as soon as
possible after delivery, before it is stored.
Concealed damage must be reported within 15 days.
If concealed damage is discovered, stop unpacking the
shipment.
Do not remove damaged material from the receiving location. Take photos of the damage, if possible. The owner
must provide reasonable evidence that the damage did not
occur after delivery.
Notify the carrier’s terminal of damage immediately by
phone and by mail. Request an immediate joint inspection
of the damage by the carrier and the consignee.
Note: Do not attempt to repair any damaged parts
until the parts are inspected by the carrier’s representative.
Open and lock the unit
disconnect switch before installing this accessory.
Failure to do so could result in severe injury or
death due to electrical shock or contact with moving
parts.
Installation
Table 2
Maximum Fresh Air CFM
Unit
YC,TC(D,H) 103, 103
YC,TC,WC(D,H) 120, 121
YC,TC,WC(D,H) 150, 151
YC,TC,WC(D,H) 180
YC,TC(D,H) 181, 210, 211
YC,TC,WC(D,H) 240, 241
YC,TC(D,H) 300
1. Open the unit disconnect switch.
2. Remove screws securing the fresh air adjustment panel
to the unit's end panel.
3. Adjust the amount of fresh air desired by changing the
position of the fresh air panel. Refer to Table 1 to determine the correct opening for the specified amount of
fresh air, based on the operating return static pressure.
4. Secure the fresh air adjustment panel to the unit end
panel with 2 screws.(Remaining screws to be used in
step 8.)
Max CFM
850
1000
1250
1500
1750
2000
2500
Note: Install the filter/mist eliminator with the arrow
pointing in the direction of the airflow. The filter/mist
eliminator can be taken out for cleaning by removing the screws installed in step 6.
5. Using the provided screws, assemble the fresh air hood,
as illustrated in Figure 1.
7. Install the provided gasket onto the hood mounting
flange.
6. Install the filter/mist eliminator into the fresh air hood and
secure it in place using three screws in each side, as illustrated in Figure 1.
8. Install the fresh air hood onto the end panel of the unit
using the six screws removed in step 2, as illustrated in
Figure 1.
Table 1
Fresh Air CFM vs. Return Static Pressure
9. Close the unit disconnect switch and start the supply fan.
(036-060) Manual Fresh Air Accessory Airflow
Inches
Return Static -- inch W. G.
Open -0.05 -0.1 -0.2
-0.3 -0.4 -0.5
-0.6 -0.7
1
70
100 120
160
190
230
280 270
2
140 200 240
330
380
460
570 550
3
200 270 330
450
520
600
740 730
4
250 330 420
560
650
750
900 910
5
300 390 510
680
790
890
6
350 450 600
790
920
6½
380 490 650
860 1000
Do not operate
Do not operate 3 or 4 ton
3 ton in this area.
in this area.
To prevent injury or
death from electrocution or contact with moving
parts, it is the responsibility of the technical to
recognize these inherent hazards and use extreme
caution when performing service procedures with
the electrical power energized.
10. Measure the full load amps of the supply fan motor. If
the amperage exceeds the motor nameplate value, system CFM may be too high. Make the necessary adjustments to lower the motor amperage to the nameplate
value, by; readjusting the fresh air damper or adjusting
the fan RPM.
(061-091) Manual Fresh Air Accessory Airflow
Inches
Return Static -- inch W. G.
Open -0.05 -0.1 -0.2 -0.3 -0.4 -0.5
-0.6 -0.7
1
110 160 190 260 300 370
380 440
2
200 260 350 440 530 600
640 740
3
280 360 500 530 750 830
900 1040
4
340 440 600 790 930 1040 1140 1280
5
400 530 700 960 1100 1250 1370
6
450 640 890 1120 1300 1460
7
500 760 1080 1270 1500
w/Open 520 780 1120 1320
Do not operate 6 ¼ ton
in this area.
Figure 1
YC,TC(D,H)102-300 (8.5-25 Tons)
WC(D,H)102-240 (8.5-20 Tons)
Manual Fresh Air Accessory Airflow*
Inches
Open
1"
2"
3"
4"
5"
6"
7"
W/Open
Return Static -- inch W. G.
-0.1 -0.2 -0.3 -0.4 -0.5 -0.6
80 159 195 221 277 292
197 296 361 415 498 511
318 432 528 610 720 731
431 569 694 804 941 950
471 680 830 959 1086 1174
511 791 965 1113 1231 1398
598 910 1095 1268 1422 1592
707 1058 1258 1462 1661 1835
-0.7
352
586
819
1053
1289
1525
1731
1989
-0.8
383
636
890
1143
1401
1659
1886
2170
-0.9
378
656
933
1211
1458
1705
1958
2275
-1.0
438
717
997
1276
1573
1870
2115
2422
* Before utilizing CFM’s listed in the shaded area, refer to
Table 2 for maximum allowable fresh air for the unit.
© American Standard Inc. 1999
Technical Literature Printed in USA
2