FumeJet
®
Fume Exhaust Fans
7
®
NOTE
On the model FJ-M, the plug needs to be removed
from threaded drain connection regardless of plans to
pipe and trap.
Fan Drainage Piping and Trap Detail
(by others)
Fans have been supplied with a drain. Drains are
located at the underside of the scroll housing. The drain
may need to be connected to a drainage system to
ensure proper disposal of any water or condensate that
may occur.
• Drain connections are 1 inch
(25.4 mm)
MNPT
• Installed piping to have a downward angle to allow
for drainage
• Fill traps to recommended level before start-up
Note:
A conservative method of trap design is to set
N = total static pressure.
Check local codes for proper disposal of drain water
which has been in contact with the exhaust air.
Positive Pressure Trap
RECOMMENDED DRAIN TRAP DESIGN
(TRAP BY OTHERS)
FAN BYPASS
AIR PLENUM
ENERGY RECOVERY
PLENUM
SUBFLOOR
SUBFLOOR
1.25 NPT
.75 NPT
*BASED ON STANDARD
VEKTOR ERS CURB HEIGHTS
*
*
ROOF
CURB
ROOF
CURB
P.O.BOX 410 SCHOFIELD, WISCONSIN 54476-0410
TITLE
DRAWN BY
ECO
B
ENG. REF.
DATE
SUPERSEDES
SCALE
CAD DRAWING NO.
FAUST
06/29/2009
1/8
VK-ERS
N = Negative fan pressure (inches W.C.)
H = N - 0.5 inches minimum
Note: A conservation method of trap design is to set
N = TSP and P = TSP (TSP = Total Static Pressure)
H/2
H/2
H
1.25 inch (31.75mm) minimum
N
FAN ON
FAN OFF
NEGATIVE PRESSURE TRAP
14.750
14.000
NOTE: INSULATION OR OTHER MEANS
OF FREEZE PROTECTION MAY BE
REQUIRED IN CERTAIN CLIMATES
RECOMMENDED DRAIN TRAP DESIGN
(TRAP BY OTHERS)
N = Negative fan pressure (inches W.C.)
H = N - 0.5 inches minimum
NOTE: A conservative method of trap design is to set
N = Total Static Pressure and P = Total Static Pressure
H/2
H/2
H
1.25 inch (31.75mm)
minimum
N
FAN ON
FAN OFF
POSITIVE PRESSURE TRAP
Connect
this end
to fan drain.
ERS DRAIN SUBMITTAL
To avoid motor overheating and possible burnout, motor
load amperes should always be checked and compared
to nameplate rating when fan speed is increased.
Alignment of Pulleys and Belts
Check pulleys and belts for proper alignment to avoid
unnecessary belt wear, noise, vibration and power loss.
Motor and drive shafts must be parallel and pulleys in
line as shown in Figure 1.
Do not force belt(s). Forcing the
belt(s) will break the cords and
cause belt failure
Deflection = Belt Span
64
Slack
Side
Belt
Span
CORRECT
WRONG
WRONG
WRONG
CORRECT
WRONG
WRONG
WRONG
Figure 1
V-Belt Drives
V-Belt Drive Installation
1. Remove the protective coating from the end of the
fan shaft using mineral spirits or another similar
solvent. Check to ensure that the shaft is free of
nicks and burrs.
2. Slide sheaves on shafts. Do not drive
sheaves on as this may result in
bearing damage.
3. Align fan and motor sheaves
with a straight edge or string
and tighten.
4. Place belts over sheaves.
Do not pry or force belts, as
this could result in damage
to the cords in the belts.
5. Adjust the tension until the
belts appear snug. Run the unit for a few minutes
and allow the belts to “set” properly.
6. With the fan off and disconnect locked out, adjust
the belt tension by moving the motor pivot plate.
When in operation, the tight side of the belts should
be in a straight line from sheave to sheave with a
slight bow on the slack side.
FAN
MOTOR
FAN
MOTOR
Aligning Sheaves with
a Straight Edge
