Automatic outdoor reset controllers for air or liquid.
- Raises heating medium control point automatically as outdoor temperature falls.
- One remote element senses heating medium, the other senses outdoor air temperature.
- T991 has 135 ohm potentiometer for proportional heating control.
Application : Provide modulating control of water or air temperature in ducts or tanks, setpoint automatically reset as outdoor temperature changes
Dimensions (in.) : 5 5/8 in. high x 2 in. wide x 2 1/4 in. deep
Dimensions (mm) : 143 mm high x 51 mm wide x 57 mm deep
Comments : Indoor bulb temperature plus outdoor bulb temperature must not exceed 265 F (129 C)
Item Type : Product
Frequency : 50 Hz; 60 Hz
Voltage : 24 Vac to 30 Vac
Setpoint Temperature Range (C) : 21 C to 60 C
Setpoint Temperature Range (F) : 70 F to 140 F
Operating Temperature Range (F) : 125 F Maximum
Operating Temperature Range (C) : 52 C Maximum
Output : analog
Analog Output : One 135 Ohm Potentiometer
Reset Ratio : 1.0 to 1.0
Sensor Inputs : 2
Sensor Element : Copper bulb
Capillary Length (ft) : Indoor: 10 ft, Outdoor: 30 ft
Capillary Length (m) : Indoor: 3 m, Outdoor: 9.1 m
Bulb Size (in.) : 1/2 in. diameter x 4 in. long
Bulb Size (mm) : 13 mm diameter x 102 mm long
Throttling Range (F) : 3 F to 10 F
Throttling Range (C) : 1.7 C to 16.7 C
Color : Gray
Honeywell Environmental & Energy Solutions
Honeywell is an industry leader in manufacturing a comprehensive line of combustion equipment to meet critical heating requirements of virtually every industrial process. Honeywell burner management systems are designed in a variety of configurations to heat air streams, liquids, ovens and furnaces with outstanding efficiency, reliability and performance. Honeywell also offers combustion control valves, viz. Shut-Off valves and Control valves. These present many operational advantages to help prevent leakage and are engineered and tested for life cycles of 1,000,000 closures. This type of performance leadership along with excellent expertise and customer focused approach has made Honeywell a highly trusted and sought after name in combustion products worldwide –serving a multitude of industries in a multitude of applications. SIL3 Capable and CSA B149.3 certified burner management system solutions include state of the art flame controls, fuel air ratio controls, pressure switches, gas solenoid valves, mod motors and associated accessories are stocked by MicroWatt and backed by our experienced technical staff and engineering group.