Install Instructions
Table Of Contents
A421 Series Standard Electronic Temperature Controls Installation Instructions
15
Technical Specifications
PLT344-1R Two End Clamps for DIN rail sections
A99-CLP-1 Surface Mounting Clip for A99B and A99C Series Temperature Sensors
SHL10-603R Sun Shield for A99B and A99C Series Temperature Sensors
BOX10A-603R PVC Enclosure for A99B and A99C Series Temperature Sensors
WEL11A-601R Copper and brass immersion well for applying sensor in fluid applications
TE-6300W-102 Stainless steel immersion well for applying A99 sensors in fluid applications. (A99CB Type sensors with
extended probe are recommended for use with this immersion well.)
Table 8: Accessories (Part 2 of 2)
Table 9: A421 Series Electronic Temperature Controls
Power Consumption 1.8 VA Maximum
Supply Power Low-Voltage Models: 24 VAC (20 to 30 VAC), 50/60 Hz, Class 2 or Safety Extra-Low Voltage
Line-Voltage Models: 110/120 or 208/230/240 VAC, 50/60 Hz
Ambient Conditions Operating: Type 1 Models: -40 to 150°F (-40 to 66°C), 0 to 95% RH Non-condensing
Type 4X Models: -40 to 140°F (-40 to 60°C), 0 to 95% RH Non-condensing
Shipping and Storage: All Models: -40 to 185°F (-40 to 85°C), 0 to 95% RH Non-condensing
Temperature Control
Range
-40 to 212°F or -40 to 100°C
Input Signal 1,035 ohm at 77F (25C) for A99 PTC temperature sensors
Accuracy Combined accuracy of A421 control and A99 sensor: ±2F (±1C) between 5F and 167F
(-15C and 75C); diverging to ±3F (±2C) at -40F (-40C) and ±3F (±2C) at 212F (100C)
Sensor Offset Range ±5ºF or ±3ºC
Enclosure Material Type 1, IP20 High-Impact Thermoplastic or
Type 4X, IP66 Watertight, Corrosion-Resistant, High-Impact Thermoplastic
Compliance North America: cULus Listed; UL 60730, File E27734, Vol. 1; FCC Compliant to
CFR47, Part 15, Subpart B, Class B
Industry Canada (IC) Compliant to Canadian ICES-003, Class B limits
Europe: CE Mark – Johnson Controls, Inc. declares that this product is in compliance with the
essential requirements and other relevant provisions of the EMC Directive; Low Voltage Directive.
Australia and New Zealand: RCM, Australia/NZ Emissions Compliant
Table 10: A421 Temperature Control Output Relay Contacts Electrical Ratings
Agency and File UL 60730 and EN 60730
Applied AC Voltage at 50/60 Hz
24 VAC 120 VAC 208 VAC 240 VAC
Horsepower LC/LNO (LC/LNC) -- 1 (0.25) 1 (0.3) 1 (0.5)
Full Load Amperes LC/LNO (LC/LNC) -- 16 (5.8) 9.2 (4) 8 (4.9)
Locked Rotor Amperes LC/LNO (LC/LNC) -- 96 (34.8) 55.2 (24) 48 (29.4)
Resistive Amperes LC/LNO (LC/LNC) 15 (10) 15 (10) 10 (10) 10 (10)
Pilot Duty VA LC/LNO (LC/LNC) 125 (50) 125 (125) 125 (125) 125 (125)
Table 11: UL Conformity Declaration Information (Part 1 of 2)
Information Description
Purpose of Control Sensing Control / Operating Control
Construction of Control Electronic Independently Mounted Control
Number of Cycles 30,000 Cycles
Method of Mounting Control Mounting Screws or DIN Rail
Type 1 or Type 2 Action Type 1.B (Micro-disconnection)