Specifications

1
SYSTEM OVERVIEW
The SYSTEM 2000 GEN II is a commercial modulating or 2-position zone control system controlling
2-17 independent zones per unit. The GEN II controller is designed for Auto Change- over, multi-
stage Heat Pump (2C/3H) and Gas Electric (2C/2H) applications.
For modulating applications, the GEN II system uses the Zonex ModStat, which controls the “ST”
series, 3-wire, 24-volt, power open / power close round and rectangular dampers. For 2-position
damper applications, the GEN II system uses the Zonex MODS2 thermostat. The MODS2
thermostats control the TR round or TREC rectangular series, 2-wire, power close / spring open,
low pressure dampers. The TR / TREC series dampers are designed for systems 5 tons or less
(2000 CFM).
Sophisticated, integrated software allows for a wide range of system control and changeover
strategies, allowing the contractor to tailor the GEN II system to your specific application.
Additional features include LED status indication of all system functions, digital LAT display, fully
adjustable capacity control with on-board limit settings, and optional staging strategies. Night
setback operation is standard, with selectable 2-hour override at each stat, along with a unique
feature to remotely lock thermostats in the system.
The system provides the installing contractor with a simple startup diagnostic to minimize wiring
errors and speed installation.
GEN II is recognized as the Industry's easiest zone control system to install and wire. The GEN II
System operates over an unshielded two-wire data link, along with two 24 V power wires all daisy
chained from stat to stat with no home run wiring required. Three wires from the stat to actuator
control a modulating damper in each zone.
The GEN II system does not require a computer to set up or operate.