Greenheck Fan Mixed Flow Fans Belt and Direct Drive QEI-L - Manual (Page 3)

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Standard Construction
Housing
Tubular housings are constructed of welded steel to
eliminate air leakage. Integral straightening vanes are
constructed from steel and welded into place.
Wheel – Mixed Flow
Fabricated wheels are constructed from steel. The
blade profiles are angled and contoured for the most
efficient and quiet performance.
Bearings (Belt Drive)
Standard bearings are premium air handling quality,
grease lubricated, self-aligning, ball or roller type.
Bearings are selected with a basic rating fatigue life
L
10
per ABMA standards, in excess of 80,000 hours
(L
50
at 400,000 hours) at the maximum operating
speed for the QEI-I/II and QEI-L in the horizontal
position. The QEI-L bearings are selected with a
basic rating fatigue life L
10
in excess of 50,000 hours
(L
50
at 250,000 hours) in vertical position.
Bolted Access Door
A bolted access door provides an opening through
the fan housing for cleaning or visual inspection of
the wheel. A hinged access door is available as an
accessory.
Belt Guard (Belt Drive)
A totally enclosed belt guard provides protection
from rotating pulleys and belts. Belt guards meet
OSHA Standards.
Slip-Fit Duct Connection (QEI-I/II & QEID)
Inlets and outlets are designed with extended collars
for slip-fit duct connections as standard. QEI-L is
flanged as standard. Companion flanges can be
ordered for slip fit connections.
Adjustable Motor Bases (Belt Drive)
Rigid, heavy-gauge steel motor bases are welded to
the fan housing and include heavy-duty adjustment
screws for belt tensioning.
Extended Lube Lines
Belt drive units have nylon lubrication lines with
grease fittings that allow bearing lubrication without
disassembling the fan. Grease fittings are mounted
on the outside of the fan housing. Direct drive
units have extended lubrication lines for the motor
bearings, if required. Smaller frame sized motors are
typically sealed and not lubricatable.
Permatector™ Coating
Greenheck’s Permatector coating is a thermosetting
polyester urethane, electrostatically applied to
provide uniform thickness and a clean appearance.
Permatector coatings also provide excellent
corrosion characteristics for general applications,
both indoor and outdoor. For corrosive environments
(ie. coastal), see page 9 for information on our zinc-
rich basecoat technology.
Model Number Nomenclature
The model number code provides a numbering system designed to identify the fan model,
size and horsepower.
QEI D* - 36 - I - 70 - A 30
D = Direct Drive
Percent Wheel Width
50 through 100
Fan Size
9, 12, 15, 16, 18, 20,
22, 24, 27, 30, 33, 36,
40, 44, 49, 54, 60
Motor Horsepower
4 = ¼ 30 = 3 300 = 30
3 = 50 = 5 400 = 40
5 = ½ 75 = 7½ 500 = 50
7 = ¾ 100 = 10 600 = 60
10 = 1 150 = 15 750 = 75
15 = 1½ 200 = 20 1000 = 100
20 = 2 250 = 25 1250 = 125
RPM
A = 1770 C = 870 J = 1425 M = 3600
B = 1170 F = 690 K = 950 R = 2900
Construction
L = Low Pressure
I = Class I
II = Class II
3
* Blue text is specific to direct drive model QEID only
Belt Drive available in sizes 9 through 60
Direct Drive available in sizes 12 through 54
Low Pressure available in sizes 12 through 36