Installer friendly - Ample room for terminations, large screw terminals, automatic resettable fuse, snap-in transformers |
Application versatility - 3 selectable 120 VAC auxiliary switches for enabling pumps and boilers, dedicated pump outputs, unlimited zone expansion |
Extremely reliable design - Clutch-protected drive train, durable synchronous motor, millions installed in North America |
Compact design with snap-on actuator with a convenient in-line push button, removable bottom cap allows for easy in-pipe service |
Application versatility - Hot water, chilled water and low-pressure steam |
Compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action |
Heavy duty, sealed relays |
3 pump outputs (120 VAC/5 A) and 3 to 6 (model dependent) zone valve outputs (24 V) |
Zone priority selectable with 1 hr time-out feature |
Convenient R, W, C and T, T, COM dual labeling at thermostat terminals |
System pump status (on/off) during priority selectable |
Dry contacts (XX,AUX, ZONE 1 E/S) capable of switching line voltage |
Replaceable, snap-fit 40 VA transformer on 3 and 4 zone models, expandable to 80 VA with 2nd transformer |
Two replaceable, snap-fit 40 VA transformers (80 VA) on 6 zone models |
Automatic resettable fuse on 24 V circuit |
Expandable to unlimited number of zones using simple 3-wire connection between controls |
Large screw terminals for ease of wiring on-board ground terminals |
Front panel LED indicator light for functional status |