The TK-400 universal twinning/paralleling kit is
designed to allow a single thermostat to control two separate HVAC units. The
TK-400 can also be expanded to control a total of four HVAC units. The device
can be used on common or separate ducted systems with single-stage, multistage
and heat pump equipment. Only standard 18-gauge thermostat wire is required.
Thermostats and HVAC units can be located up to 300 feet from the TK-400 panel.
When HVAC units share a common return and supply duct, backdraft dampers should
be installed and thermostat fan operation must be set for electric.
Jackson Systems LLC, 5418 Elmwood Ave., Indianapolis, IN 46203-6025;
(888) 652-9663; fax (317) 227-1034;
www.jacksonsystems.com.
THERMOSTAT CONTROL
December 1, 2008
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