Description:
VSUBR Series Variable Speed Universal Blowers (with Ryton®
coated impellers) are suitable for providing combustion air or
sidewall or vertically venting heating appliances, dryers and
ovens. Suitable for use on condensing 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, Ryton® PPS coated for superior corrosion
resistance, 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 8513033 REV 11/07
MOUNTING
LOCATION (4)
D
TOP VIEW
B
ØA
ØF
E
C
G
H
I
J
INCLUDED SQUARE
TO ROUND ADAPTER
O
L
END VIEW
M
N
K
P
Submitt
Submitt
al Dat
al Dat
a Sheet
a Sheet
VSUB20R V
VSUB20R V
ariable S
ariable S
peed Universal Blower
peed Universal Blower
Job Name:
Contractor:
Arch./Engr.:
Equipment Rep:
Prepared By:
Date:
Model VSUB20R
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"
VSUB20R
O
N
M
L
K
J
I
H
G
F
E
D
C
B
A
P
10"
