| Specification | Description |
|---|---|
| Power consumption | 1.8 VA maximum |
| Supply power | 110/120 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 |
| Sensor offset range | ±5ºF or ±3ºC |
| Enclosure material | Type
1, IP20 high-impact thermoplastic or Type 4X, IP66 watertight, corrosion-resistant, high-impact thermoplastic Note that on the type 4x enclosures, the cover screws must be torqued to 10 to 12 in·lb (1.1 N·m to 1.4 N·m) to achieve type 4X rating. |
| 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 |
| A421 | |
|---|---|
| Agency and file | UL 60730 |
| Applied AC voltage at 50/60 Hz | 120 VAC |
| Full load amperes LC/LNO | 12 A |
| Locked rotor amperes LC/LNO | 72 A |
| Resistive amperes LC/LNO | 10 A |
| Pilot duty VA LC/LNO | 125 VA |
| Information | Description |
|---|---|
| Purpose of control | Sensing control / operating control |
| Construction of control | Electronic free-standing control, in-line cord control |
| Number of cycles | 30,000 cycles |
| Method of mounting control | Mounting screws or DIN rail |
| Method of providing earthing | Attachment plug |
| Type of cord connection | Type Y |
| 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 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.