With
optional outdoor reset controls, the ZoneTrol II is a natural fit with
today’s green building strategies. Your modern hydronic systems deserve a
modern controller. Description
ITT’s Bell & Gossett ZoneTrol II is a
ready-to-install controller for hydronic circulators in residential and light commercial
applications. All ZoneTrol II controllers are UL and cUL listed and feature multi-function
LEDs that are visible without removing the cover for easy start-up and troubleshooting.
All units are compatible with analog and digital 24 VAC thermostats, including “power
stealing” designs.
The multi-zone controllers feature an advanced
microprocessor design that provides domestic hot water (DHW) priority & timer,
pump exercise and a post purge timer without the need for add-on circuit boards or
modules. Four and six zone controllers are field expandable for up to 18 pumps and are
available with integrated, pre-wired boiler reset or mix reset controllers. Units with
reset controllers include all necessary sensors.
Standard Features (multiple zone controllers only)
• Priority: Enables DHW zone to have
priority over heating zones for limited period of time. User adjustable settings include
OFF (disables priority functionality), 30 minutes and 60 minutes.
• Post Purge Timer: Circulator(s) will continue to run for 90
seconds after thermostat opens and allows additional extraction of BTUs from high mass
boilers. User adjustable settings are OFF and ON.
• Exercise: Runs each circulator for 10 seconds after each 72
hours of inactivity. User adjustable settings are ON and OFF.
• Expandability: 4 and 6 zone controllers can easily be connected
via an RJ-11 cable to accommodate systems consisting of up to 18 circulators.
• Five-year Warranty
Optional Features (4 and 6 zone controllers only)
• Boiler Reset: Incorporates a pre-wired integral boiler reset
controller into the ZoneTrol II enclosure. Reset controller cycles the burner to maintain
the optimum system supply temperature relative to the outdoor air temperature. Warm
weather shutdown functionality can be activated to prevent system operation above a
user-selectable outdoor temperature threshold. All necessary sensors are included.
• Mixing Reset: For use on hydronic systems incorporating a
variable speed injection pump. Incorporates a pre-wired integral mixing reset controller
into the ZoneTrol II enclosure. Mixing Reset controller varies the speed of the injection
pump to maintain optimum radiant loop temperature relative to the outdoor air temperature.
The boiler return temperature is also monitored to ensure that the appropriate minimum
water temperature is not violated. Warm weather shutdown functionality can be activated to
prevent system operation above a user-selectable outdoor temperature threshold. All
necessary sensors are included. |
