Tjernlund M Series Metal High Pressure Duct Boosters 8504147 Rev B 02/10 - Manual (Page 2)

INSTALLATION INSTRUCTIONS
NOTE: Electrical cord is 6.5 feet (2 meters).
1. Cut and adhere foam gasket on inlet and outlet collars of fan, (See Diagram A).
2. Make sure fan is mounted with air flow direction arrow pointing in the right direction. The air flow exits opposite motor side, (See Diagram B)
3. Use included screws to fasten fan to mounting bracket. Fasten mounting bracket against a solid surface with proper orientation and
air flow direction in mind, (See Diagram C).
WIRING DIAGRAMS
Connection with Flex Duct
Use Nylon Ties and Over-Wrap
with Duct Tape
Use Sheet Metal Screws (1” Max) and
Over-Wrap with Duct Tape
Encircle with Perforated Plumber’s
Strap and Secure Tightly
Mounting with Perforated Strap Connection with Rigid Duct
DIAGRAM B DIAGRAM C DIAGRAM A
Rotation
Arrow Motor Air Flow
Direction
Arrow
Air Flow
MODEL SCP SPEED CONTROL
The optional SCP Speed Control is a convenient and easy
way to vary the speed of the M-Series fans. The SCP is fac-
tory calibrated for use with Tjernlund’s M & P series high
pressure fans. Plug fan into speed control and plug speed
control into 115 VAC outlet. INTERNAL WIRING
If it is necessary to hard-wire fan, remove power cord and
follow diagram below. IMPORTANT: All wiring must be in
accordance with the National Electrical Code. Verify sup-
ply voltage and power consumption of fan are suitable for
circuit fan will added to.
(OPTIONAL PS1503 DUCT AIRSTAT SWITCH)
The Tjernlund PS1503 Duct Airstat is used to automatically activate Duct Booster®
fans by sensing positive pressure in a forced air heating and/or cooling system.The
single pole, single throw, snap-acting switch is activated by a diaphragm with a factory
installed sampling probe inserted directly into the duct or plenum.