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Xylem'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.
Bell & Gossett ZoneTrol II™ Zone Pump Controller, Model Z-4, 120 VAC, 20 A, 13-1/2 in W x 8-1/4 in H x 3-1/4 in D
| Amperage Rating | : | 20 A |
| Dimensions | : | 13-1/2 in W x 8-1/4 in H x 3-1/4 in D |
| Voltage Rating | : | 120 VAC |
| Warranty | : | 5 Years |
- 4 zones
- Priority: Enables DHW zone to have priority over heating zones for limited period of time
- User adjustable settings include OFF (disables priority functionality), 30 min and 60 min
- 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
- Exercise: Runs each circulator for 10 sec after each 72 hrs of inactivity
- Can be easily connected via a ZC-11 cable to accommodate systems consisting of up to 18 circulators
- Model Z-4
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