23
Make Duct Connections — If applicable, install all
ductwork to and from unit in accordance with all applicable
codes. Duct construction must allow unit to operate within duct
external static pressure limits as shown on job submittals and in
Tables 5 and 6. Duct opening should be the same size as the
unit. For units ducted to multiple openings, make sure there is
adequate straight duct, as shown below, immediately after the
unit.
Units provided with outside air must utilize the low-
temperature safety switch to prevent coil freeze-up.
Insulate all ductwork as required. Use flexible connections
to minimize duct-to-unit alignment problems and noise trans-
mission where specified.
Install ductwork, grilles, and plenums so that they do not
restrict access to filter.
Cut openings for supply and return air grilles, thermostats,
and switch plates where specified on job drawings. Be careful
not to cut wires, piping, or structural supports. Use a steel ther-
mostat shield ring to protect drywall from thermostat wiring
where applicable.
Prevent dust and debris from settling in unit. If wall finish or
color is to be applied by spraying, cover all openings to
prevent spray from entering unit.
Table 5 — Unit Ventilator Airflow — PSC Motor*
LEGEND
*Standard on sizes 050-150.
NOTE: Use the table below to determine the heating and cooling coil
combinations available with PSC Motor operation.
†DX cooling applications are only available in 3-row cooling
configurations.
40UH 075 100 125 150 200
Minimum Straight
Duct Required
(Length in ft)
45 52 58 63 75
Units designed to operate with ductwork may be damaged
if operated without intended ductwork attached.
Ensure that units ducted to multiple openings have sufficient
straight duct immediately after the unit.
FACTORY SETTINGS — CHILLED WATER COIL APPLICATIONS
Unit Speed
Approximate Air Delivery (Cfm)
1-Row 2-Row 3-Row 4-Row 5-Row 6-Row 7-Row
40UV050
Max 522 510 497 485 490 489 457
High 503 490 476 464 473 476 444
Low 458 449 440 425 452 455 430
40UV,UH075
Max 806 778 750 747 766 732 697
High 682 664 645 629 621 596 570
Low 569 554 539 527 533 514 495
40UV,UH100
Max 1064 1033 1001 1013 973 980 967
High 662 659 655 642 763 740 717
Low 530 519 507 503 498 501 504
40UV,UH125
Max 1295 1285 1215 1218 1239 1250 1175
High 899 930 876 865 852 846 846
Low 568 616 597 570 568 558 573
40UV,UH150
Max 1542 1480 1500 1484 1468 1482 1374
High 1071 1068 1065 1034 1033 1031 1013
Low 812 801 790 881 848 842 799
FACTORY SETTINGS — ELECTRIC HEAT/DX COIL APPLICATIONS
Unit Speed
Approximate Air Delivery (Cfm)
1-Row 2-Row 3-Row 4-Row 5-Row 6-Row 7-Row
40UV050
Max 522 510 497 485 490 489 457
High 503 490 476 464 452 455 430
Low 458 449 440 425 410 414 406
40UV,UH075
Max 806 778 750 747 766 732 697
High 682 664 645 629 621 596 570
Low 569 554 539 527 533 514 495
40UV,UH100
Max 1064 1033 1001 1013 973 980 967
High 794 788 782 773 857 834 810
Low 662 659 655 642 628 620 611
40UV,UH125
Max 1295 1285 1215 1218 1239 1250 1175
High 1055 1040 1024 995 1099 1091 1052
Low 738 767 732 719 987 986 964
40UV,UH150
Max 1542 1480 1500 1484 1468 1482 1374
High 1285 1257 1229 1248 1246 1239 1199
Low 934 928 922 901 1033 1031 1013
CX — Chilled Water Applications
DX — Direct Expansion
HW — Hot Water
COOLING COIL
HEATING COIL
HW Steam Electric
5RowsCW 1 or 2 rows N/A 3 elements
4RowsCW 3 rows 1 or 2 rows 4 elements
3RowsCWorDX† 4rows 1or2rows 5or6elements
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