Robertshaw SLIMZONE ENVIRONMENTAL MODULE - Manual (Page 7)

SETUP
TRANSFORMER
The SZEM module requires a separate transformer rated at a minimum of 20 VA to power
the module and the bypass actuator.
LOCATION
CAUTION: Do not mount the SZEM module directly on the ductwork. Temperature fluctua-
tions within the duct will adversely affect the operation of the module.
INSTALLATION
Fasten the module with the two #8 sheet metal screws provided with the module and install
in a convenient location near the bypass damper, allowing for proper placement of the duct
temperature and pressure probes.
BYPASS SYSTEM OPERATION AND INSTALLATION
OPERATION
The SZEM module monitors the system’s static pressure using an electronic duct-mounted
pressure sensor with a range of 0 to 1" WC, and modulates a bypass damper accordingly.
Two triac outputs (24 VAC, 300 mA) control the bypass actuator. The OPEN LED indicates
when the drive open actuator is energized, and the CLOSE LED indicates when the drive
close actuator is energized. The static pressure is measured by an electronic pressure sensor,
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