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PO. Box 726 n TULSA, OK 74101 n TEL 918-627-5530 n FAX 918-641-7336 n www.nelsonheaters.com
GA-2318, R1
Sheet 13 of 15
May 2008
SMMC-3 CONTROL PANEL (ACCESS COVER REMOVED)
SMTS-1
Zone 1 Sensor
Input SMAS-1 or
SMGS-1 (Default)
Zone 2 Sensor
Input SMAS-1 or
SMGS-1
Zone 3 Sensor
Input SMAS-1
or SMGS-1
Zone 1 Sensor
Input SMPS-1
(must be programmed
To activate)
Zone 2 Input
for SMPS-1
Zone 3 Input
for SMPS-1
Zone 1 Output
Terminal Block
Connector to
Contactor Coil
(Default)
Zone 2
Output
Zone 3
Output
Fuse
“Fuse OK” LED
120VAC Power Connection
Wiring guide on
back of terminal
block cover
Temperature
Sensor, SMTS-1:
this is included with
the SMMC-3 and
must be installed
out
doors to sense air
temperature.
Aerial Snow
Sensor, SMAS-1:
Mast mounted to
sense falling snow
(may be used as the
preprogrammed
sensor).
Gutter Sensor,
SMGS-1: secured in
the gutter to detect
moisture conditions
(may be used as the
preprogrammed
sensor).
In-Ground Sensor, SMPS-1:
installed in-ground to detect
moisture and slab temperature
(the SMMC-3 must be
programmed to recognize this
sensor, refer to the instruction
manual for details).