Pulley/Sheave Alignment And Belt Tension - C-Aire S260R-LD1-115P Owner's Manual

C-Aire offers two styles of pressure switches on its dry pipe sprinkler compressors. The standard pressure switch is on at
70psi and off at 100psi and is not to be adjusted. The adjustable pressure switch, denoted by an U at the end of the model
number, can be adjusted per the instructions below.
Turn clockwise to increase
both cut-out and
cut-in pressure

PULLEY/SHEAVE ALIGNMENT AND BELT TENSION

11
MODEL NUMBERING SYSTEM
S500
HOW TO ADJUST
ADJUSTABLE PRESSURE SWITCH
COMPRESSOR
SHEAVE
HD U
Differential adjustment,
turn clockwise to increase
cut-out pressure without
changing cut-in pressure
SETTING THE BELT TENSION
SPAN LENGTH
DOWNWARD
DEFLECTION
(INCHES)
MOTOR
PULLEY
DIAMETER