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4
Introduction / Overview
Congratulations on your purchase of the SPAL FAN-PWM! Due to the various in-
stallation congurations, please carefully read the entire manual before installing
the FAN-PWM. This SPAL Electric Fan Controller (FAN-PWM) will vary the speed
of the fan based on engine temperature by using Pulse Width Modulation tech-
nology. A second fan can be added but requires the use of an additional relay to
control the secondary fan (SPAL part number FRH). The secondary fan will not be
variable speed; it will be ON/OFF only.
Because the FAN-PWM was designed to alter the speed of the fan, SPAL USA
suggests setting the High 10° to 20° above the thermostat rating and setting the
Low at least 10° below the High.
Instruction Manual Highlights
Wiring 15 - 19
Programming 11 - 14
Trouble Shooting 21 - 24
Frequently Asked Questions (FAQ) 25 - 26
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