| Specification | Description |
|---|---|
| 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°F
to 150°F (-40°C to 66°C), 0% to 95% RH noncondensing Type 4X models: -40°F to 140°F (-40°C to 60°C), 0% to 95% RH noncondensing Shipping and storage: All models: -40°F to 185°F (-40°C to 85°C), 0% to 95% RH noncondensing |
| Temperature control range | -40°F to 212°F or -40°C 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 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 |
| A421 | ||||
|---|---|---|---|---|
| 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) |
| 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 | 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 |
| Specification | Description |
|---|---|
| Sensing range1 | Type
A99BA and A99BB: -40°F to 212°F (-40°C to 100°C) Type A99BC: -40°F to 248°F (-40°C 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. |
| 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 3 |
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.