Brochure

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.
ITT
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.bellgossett.com
The ITT Engineered Blocks symbol and “Engineered for life” are registered trademarks
of ITT Corporation. © 2007 A-357A November 2007 Printed in U.S.A.
ZoneTrol
™
II
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
* fits 4 and 6 zone controllers only – one required for each slave controller.
Model
Number
Part
Number
Zones
Combined Load
(max.) @ 120 VAC
Dimensions W x L x D
Inches (mm)
Weight
Lbs (kg)
Z-1 109424 1 5 amps 6.5 x 5 x 3 (165 x 127 x 76) 2.6 (1.18)
Z-2 109425 2 20 amps 6.5 x 5 x 3 (165 x 127 x 76) 3 (1.36)
Z-3 109426 3 20 amps 6.5 x 5 x 3 (165 x 127 x 76) 3.1 (1.4)
Z-4 109427 4 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 7.3 (3.3)
Z-4M 109428 4 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 8.5 (3.9)
Z-4B 109429 4 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 8.5 (3.9)
Z-6 109430 6 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 7.5 (3.4)
Z-6M 109431 6 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 8.7 (3.9)
Z-6B 109432 6 20 amps 13.5 x 8.25 x 3.25 (343 x 210 x 83) 8.7 (3.9)
ZC-11* 109454
Communication cable for connection of multiple controllers
0.1 (0.05)
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.