Electronic Temperature Reset Control (with Relay) A350R
Model DeSCrIpTIon
The A350R Reset Controller is designed to raise or lower the setpoint of supply water temperature based upon a proportionate drop or rise in temperature at the master (outdoor) sensor. The control output is a Single-Pole, Single-Throw (SPST) normally open relay with Light- Emitting Diode (LED) indication.
FeATureS
• Modular design enables stage, display, and transformer modules to be purchased and installed as necessary
• Adjustable master reset setpoint (M.R.S.) enables the user to select a master (outdoor) sensor temperature starting point for the supply reset ramp
• Adjustable minimum and maximum supply temperature permits compliance with equipment manufacturer’s specifications
• Selectable warm weather shutdown temperature saves energy by disabling equipment when the master sensor temperature rises to a point where heating is no longer required
Temperature Sensors Temperature Sensors Temperature Sensors Temperature Sensors Temperature Sensors Enclosure
Immersion Well Sun Shield
DIN Rail Sections DIN Rail Sections
DIN Rail End Clamps
Cable for Remote Mounting of D350 Display Module Cable for Remote Mounting of D350 Display Module Cable for Remote Mounting of D350 Display Module
1. WHA29A-600R can also be used to daisy chain S350 Stage Modules together. Industrial Controls • www.indcontrols.com • 800-423-3960 465 Descriptions
Temperature Reset Control (packaged with A99BB-300C and A99BC-25C sensors) Temperature Reset Control (temperature sensors not included) Fahrenheit Scale Celsius Scale
Fahrenheit Scale Celsius Scale
Dual Scale (°F and °C) Dual Scale (°F and °C)
120/240 VAC, 50/60 Hz input; rectified 24V Class 2 output PTC Silicon Sensor with PVC Cable; Cable length 9-3/4 ft (3m)
PTC Silcon Sensor with high temp. silicon cable; cable length 9-3/4 in. (0.25 m) PTC Silcon Sensor with high temp. silicon cable; cable length 9-3/4 ft (3 m) PTC Silcon Sensor with high temp. silicon cable; cable length 16-3/8 ft (5 m) PTC Silcon Sensor with high temp. silicon cable; cable length 49 ft (15 m) PVC Sensor Enclosure
For liquid sensing applications
For use with outside sensors in sunny locations 35 x 7.5 mm, 12 in./0.305 m long 35 x 7.5 mm, 36 in./0.914 m long Two end clamps 3 ft (0.9 m) ¹ 25 ft (7.6 m) 50 ft (15.2 m)