15 Foot Lead Length is Used to Control Floor Temperatures of In-Floor Radiant Heating Application

Two-wire polarity-insensitive non-programmable network communicating thermostat

User buttons feature liquid crystal display as well as outdoor, indoor and floor temperature displays

Floor temperature sensing with minimum and maximum limits (when used with optional AQ12C20 Slab/Floor Sensor (sold separately))

Selectable temporary and permanent backlight

The PA404A is a Pressure Actuated High Limit, Safety Control for Steam Heating Boilers

It Breaks an Electrical Circuit to Shut Down the Burner if Steam Pressure Rises Above a Safe Level

The PA404B is Used with Suspension-Type Unit Heaters to Make the Fan Circuit When a Pressure Rise Indicates the Presence of Steam

Each Model Contains an SPST Micro Switch Snap Acting Switch

Sensitive Pressure-Actuated Diaphragm Expands or Contracts with Pressure Variations, Moving a Lever Mechanism Which Operates the Snap Switch

A Screw on Top of the Case Allows Set Point Adjustment without Removing the Cover

Differential is Adjusted by Means of a Dial Located Inside the Case

Simplify the wiring process

Easy to follow PC board and secure screw terminal layout eliminates problems caused by incorrect wiring

External indicator lights confirm operation sequence and diagnostic feedback

The unit includes two built-in 40 Volt Amp transformers, Extra fuses provided

This 3-Wire Thermostat Offers System Set-Up Capabilities with Simple, Easy-To-Use Menus

There is a Reduced Operating Mode which May be Used for Nighttime and Vacation Periods

With the Optional Floor Sensor this Thermostat Can Regulate Either the Floor or the Room Temperature or Both in that Case the Floor Sensor is Used as a Temperature Limiter, Either High or Low Limit

Thermostat May Also be Used to Control Relays and Other Low Voltage Controls

This Thermostat Uses Silent Operation Electronic Triac Output