A421 Series Standard Electronic Temperature Controls Installation Instructions
16
Technical Specifications
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 77
F (25
C) for A99 PTC temperature sensors
Accuracy
Combined accuracy of A421 control and A99 sensor: ±2
F (±1
C) between 5
F and 167
F
(-15
C and 75
C); diverging to ±3
F (±2
C) at -40
F (-40
C) and ±3
F (±2
C) at 212
F (100
C)
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:
Regulatory Compliant Mark (RCM)
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
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)
External Pollution Situation
All Models: A421 [ ] B: Pollution Degree 3
All Models: A421 [ ] E: Pollution Degree 4
Internal Pollution Situation
Pollution Degree 2
Heat and Fire Resistance Category
D
Rated Impulse Voltage
4000 V
Ball Pressure Temperature
128 C
Cover Screw Torque Requirements
Instruction
All Models: A421 [ ] E: To Maintain Type 4X / IP66 Rating, Tighten Enclosure
Screws to: 10 - 12 in·lb
