Brochure

RELAYS ZONETROL II Switching Relays
with Reset Option for Zoning with Pumps
Specifications
23
Description
Xylems’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.
* 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 15 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-6 109430
6
13.5 x 8.25 x 3.25 (343 x 210 x 83)
7.5 (3.4)
ZC-11* 109454
Communication cable for connection of multiple controllers
0.1 (0.05)
20 amps
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
The next generation of zone controllers
from Bell & Gossett brings 21st century
technology to residential controls.