(2) High limit, low limit and circulator controllers used to regulate boiler water temperature in gas or oil fired hydronic heating systems. Immersion type, liquid-filled sensing element actuates two snap switches.
(3) Used to limit or control temperature in air conditioning systems or refrigerated enclosures. Commonly used as a low ambient limit for fail safe operation of mechanical systems. Capillary Mounting Clip Part Number 314439
The TDA-6 displays and alarms on input from up to six separate sensors measuring temperature, relative humidity, pressure or any other parameter measured by a 4-20 mA transmitter. The sensors can be located up to 1000 feet away. The alarm high and low parameters can be set for each channel. When any channel exceeds high or low setpoints, the control initiates alarm sequence. After the customer selected time delay of 0 to 99 minutes, an 80 decibel horn will sound, the 24 Vac, SPDT , 1 amp relay will be energized and a flashing LED will indicate which channel is in alarm. The alarm signal can be programmed to turn off automatically when the program corrects itself or the silence button on the front panel is pushed. The TDA-6 has an ...
Electronic four-step sequence controller operates up to four external AC power handling relays or loads in heating, ventilating and air conditioning systems. A second unit can be sequenced to provide up to eight steps.
(2) For proportional temperature control of pneumatic valves and actuators to maintain discharge temperature of reheat systems and sampling chamber or return air temperature of terminal units and as a proportional low limit thermostat. Heating Direct Acting - Increase output pressure on temperature rise: Reverse Acting - Decrease output pressure on temperature rise. Field changeable - reverse acting.
(4) Electronic sensing of temperature at remote room locations, ducts, plenum chambers, liquid lines, outdoor air etc. Commonly used with Barber Colman CP Series Controllers.
Universal replacement Includes removable knob and tension clip for conversion to knob screwdriver or concealed adjustment. Replaces White-Rodgers 1127-2, A19DAC-1. Not for use a limit control
The A28 Series two stage temperature controls with NEMA 1 enclosure are designed to cover a broad range o general purpose operating temperature control application in the refrigeration, air conditioning and heating fields. Two SPDT switches permit independent control circuits. Each switch may be wired for "open high" or "close high" action, as required, providing automatic changeover on heating-cooling or similar requirements. Well not supplied (order separately)
(3) The A70 Series contact are designed so that when the main contact opens auxiliary contact closes. The control responds to the lowest temperature along any 1' of the vapor charged sensing element.
The A72AE Series temperature controls are designed to provide adequate head pressure by controlling the fan or water flow on evaporative condensers and cooling towers.
The A19 Series coiled bulb thermostat has a wide temperature control range and is commonly used for return air or space temperature sensing. Universal replacement includes removable know & tension clip for conversion to knob, screwdriver or concealed adjustment
