Table 10: UL conformity declaration information
Information
Description
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 4,000 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
Table 11: A99B Series Positive Temperature Coefficient
Sensors Technical Specifications
Specification
Description
1
Sensing range
Type A99BA and A99BB: -40°F to 212°F (-40 to
100°C)
Type A99BC: -40°F to 248°F (-40 to 120°C)
Reference
resistance
1,035 ohms at 77°F (25°C) and 855 ohms at
32°F (0°C)
Accuracy
0.9°F (0.5°C) between 5°F and 167°F
(-15°C and 57°C). Refer to the
A99B Series
Temperature Sensors Product/Technical Bulletin
(LIT-125186)
for accuracy rating outside of this
temperature range.
Table 11: A99B Series Positive Temperature Coefficient
Sensors Technical Specifications
Specification
Description
Sensor
construction
Probe: Stainless steel
Sensor cable
sheath
Type A99BA: Shielded PVC cable
Type A99BB: PVC cable
Type A99BC: High temperature silicon cable
Wire gauge
22 AWG
Ambient
operating
conditions
Type A99BA and A99BB: -40°F to 212°F (-40°C
to 100°C); 0% to 100% RH, condensing
Type A99BC: -40°F to 248°F (-40°C to 120°C);
0% to 100% RH, condensing
Ambient storage
conditions
Type A99BA and A99BB: -40°F to 221°F (-40°C
to 105°C); 0% to 100% RH, condensing
Type A99BC: -40°F to 266°F (-40°C to 130°C);
0% to 100% RH, condensing
Shipping weight 1.4 oz (41 g) for 6 1/2 ft (2 m) sensor
Accessories
See Table 7
1
When any A99 Series Temperature Sensor is connected
to a standard A421 Control model, the range of displayed
temperature values is -40ºF to 212ºF or -40ºC to 100ºC.
The performance specifications are nominal and conform to
acceptable industry standards. For application at conditions
beyond these specifications Johnson Controls shall not be
liable for damages resulting from misapplication or misuse of
its products.
North American emissions compliance
United States
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used
in accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Canada
This Class (B) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe (B) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
A421 Series Electronic Temperature Controls with Cycle Timer Installation Guide
13
