Table 6 -- Unit Ventilator Airflow -- ECM Airflow
UNIT SIZE
40UV080
40UV,UH075
40UV,UH100
40UV,UH125
40UV,UH150
40UH200
MOTOR
HP
1/3
1/3
1/2
1/2
LEGEND
COIL TYPE
CW
3-4EH/DX
5-6EH
CW
3-4EWDX
5-6EH
CW
3-4EH/DX
5-6EH
CW
3-4EWDX
5-6EH
CW
3-4EH/DX
5-6EH
ALL
APPROXIMATE AIR DELIVERY (Cfm)
ESP Speed Board Position
Low Position Med Position High Position Max Position
(0.0 in. wg) (0.10 in. wg) (0.25 in. wg) (0.45 in. wg)
Max High Low Max High Low Max High Low Max High Low
499 336 246
499 419 336
491 380 324
747 484 346 753 540 432 752 530 437 751 541
747 644 498 753 609 472 752 612 470 751 618
755 645 583 746 598 539 755 585 554 765 610
997 703 505 987 693 543 1012 663 483 994 692
997 853 615 987 850 639 1012 823 626 994 819
1016 819 719 1002 851 709 1024 798 787 1024 820
1266 880 657 1239 905 609 1235 898 676 1231 898
1266 1023 769 1239 1055 758 1235 1037 765 1231 1010
1259 1049 897 1239 995 888 1226 995 808 1253 994
1503 1033 775 1479 1046 712 1494 1020 770 1486 1075
1503 1246 956 1479 1216 965 1494 1209 927 1486 1222
1517 1222 1066 1490 1206 1087 1499 1159 1120 1503 1189
2014 1384 1023 1981 1386 971 1965 1385 997 1914 1354
NOTES:
1. Factory default is Low Position.
2. Med, High, and Max positionsare field settings.
3-4EI-I/DX-- Direct Expansion Coil Applicationswith 3 to
4 Elements of Electric Heat
5-6EH -- 5 to 6 Elements of Electric Heat
CW -- Chilled Water Applications
ESP -- External Static Pressure
386
498
542
480
618
734
627
778
919
737
917
1074
993
Make Final Preparations
l. Turn power off (lock out and tag electrical disconneet).
2. Install thermostats and perfoma any other final wiring as
applicable.
3. Clean dirt, dust, and other construction debris from unit
interior. Be sure to cheek fan wheel and housing.
4. Rotate fan wheel by hand to be sure it is free and does not
rub on housing.
5. Be sure drain line is clear and is properly and securely
positioned. Pour water into drain to cheek operation.
6. Vent all air from unit coil and related piping. If air vent is
manual, release air from system by taming air vent screw
1V2 turns counterclockwise with screwdriver. When
steady stream of water begins to escape, close valve. If air
vent is automatic, trapped air will be vented automatical-
ly. Vent releases air slowly, usually dripping water into
drain pan in the process.
Make sure all service valves am open and that motorized
control valves, ff supplied, am set for automatic operation.
7. Cheek all control valves in the system for proper opera-
tion in accordance with valve manufacturer's instructions.
8. For units with factory-installed balancing valves, adjust
as follows:
a. Butterfly valves -- Turn valve gate by inserting
screwdriver into slot in valve top and rotating up to
90 degrees. Valve is fully open when slot is parallel
with valve body. When slot is perpendicular to
body, flow through valve is at minimum. Valve
does not seal against flow.
b. Ball valves with lever handles -- Valve gate action
is similar to butterfly valves above except that
when handle is perpendicular to valve body, there
is no flow through valve. Ball valves may be used
as shutoff valves.
9. Install filter in frame at front of coil. If field-supplied
filters are used, be sure size is correct. See Table 1 for
filter data.
10. Ensure all panels and filters are installed before cheeking
fan operation. Turn on unit power. Check fan and motor
operation.
IMPORTANT: Do not start up or operate unit without
filter and panels installed. Be sure filter and unit interior
are dean.
START-UP
Start-up procedures vary depending on time of year (sum-
mer or winter) and building characteristics (new budding/old
building, oeeupiedAmoeeupied, etc.).
Start-up in the Cooling mode requires proper care to avoid
condensation problems. Condensation forms on surfaces that
am colder than the dew point of the surrounding air. If a unit is
started and is piped with low-temperature chilled water in a
hog humid atmosphere, condensation will form on many parts
of the unit. In order to avoid excessive condensation, higher
tempemtore water should initially be used (approximately 65 to
70 F). Also, the building should be as completely dosed as
possible. Close the unit's outside-air dampers. Bathroom and
kitchen exhaust fans should be off.
As the building temperature drops, the chilled water temper-
ature can be gradually reduced until it reaches 50 E At this
point the outside-air damper can be opened to take in minimum
outside air. When the chilled water temperature is reduced to its
design point, the exhaust fans can be tamed on.
24
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