Description:
The VSUB20SS Variable Speed Universal Blower is suitable
for providing combustion air or sidewall or vertically venting
heating appliances, dryers and ovens. Suitable for use on con-
densing equipment. Can be installed indoors or outdoors.
Use with the CPC-3 Constant Pressure Controller, Closed
Loop VFD and TD-Series Pressure Transducer for an
Automatic-Variable Speed system which will modulate to
always deliver the perfect amount of draft or combustion air.
For an Adjustable-Fixed Speed system, use an Open Loop
VFD to manually adjust speed of the VSUB.
Housing Construction:
Constructed of 14-gauge, Type 316L stainless steel with con-
tinuous welds. The blower outlet rotates 180° for installation
flexibility. The motor chassis slides away from the housing on
polyethylene guides for easy motor and impeller access.
Impeller:
Backward inclined, Type 304 stainless steel, Class 1 impeller
is both dynamically and statically balanced with permanently
attached balancing weights.
Motor:
Three phase, 3 HP, 208-230/460 VAC, TEFC, EPACT High
Efficiency Rated, arctic-duty, thermal overload protected, per-
manently lubricated and sealed ball bearing.
Standard Equipment:
• 4” x 4” weatherproof junction box with 4’ conduit
• Square to round vent pipe adapter
• PSA-1 Fan Proving Switch
• FFP-1 Freeze and Fire Protection Limit
(FFP-1 For combustion air applications only!)
• Condensate drain kit
Optional Controls:
• CPC-3 Constant Pressure Controller
• IPS-1 Indoor Pressure Sensor decorative cover, fittings
• TD-2 Pressure Transducer (+0.15” to -0.60” w.c.)
For draft or “Sealed” (ducted sealed combustion air) sensing
• TD-3 Pressure Transducer (+0.10” to -0.10” w.c.)
For “Open” (room pressure) combustion air sensing
•
VFD-Series Variable Frequency Drives
Temperature Rating:
U.S. and Canada 575°F / 300°C
Listings:
ETL # 56826
UL 378 - Draft Equipment / Variable Speed
UL 705 - Power Ventilators
CSA-CAN3-B255-M81*
*Not Listed for use on condensing equipment in Canada.
Warranty:
2 year mechanical
Tjernlund Products, Inc. • 1601 Ninth Street • White Bear Lake, MN 55110 • (651) 426-2993 • (800) 255-4208 • FAX (651) 426-9547 • www.tjernlund.com
P/N 8513040
MOUNTING
LOCATION (4)
D
TOP VIEW
B
ØA
ØF
E
C
G
H
I
J
INCLUDED SQUARE
TO ROUND ADAPTER
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L
END VIEW
M
N
K
P
Submitt
Submitt
al Dat
al Dat
a Sheet
a Sheet
VSUB20SS V
VSUB20SS V
ariable S
ariable S
peed Universal
peed Universal
Job Name:
Contractor:
Arch./Engr.:
Equipment Rep:
Prepared By:
Date:
Model VSUB20SS
208-230 Volt
460 Volt
Power hp
3
3
Amps A
8.8 - 8.2
4.1
Voltage VAC
3x208-230
3x460
Weight
370 Lbs. / 168 Kgs.
43 1/2"
23 7/16"
15 3/8"
33 1/2"
20 1/8"
27 15/16"
26 7/16"
47 3/16"
45 3/16"
19 11/16"
32 11/16"
15 1/8"
14 7/16"
14"
19 7/8"
VSUB20
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
P
10"
VSUB20SS
