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NASS24B premium features and benefits
Field installed electric heat with breaker 5-20 kW
Control voltage terminal strip.
ECM, constant torque and constant CFM models available.
Copper sweat connections.
Shipped with a nitrogen holding charge.
Factory installed and calibrated TXV.
Factory installed A2L refrigerant sensor and mitigation control.
Model Number Guide
NASS24B QuickFacts
44.5cm W x 109.2cm H x 53.3cm D (17.5" W x 43.0" H x 21.0" D)
Product approvals
- AHRI Certified
- Yes
- cETLus
- Yes
| Item | NASS24B | |
|---|---|---|
| Dimensions | 44.5cm W x 109.2cm H x 53.3cm D (17.5" W x 43.0" H x 21.0" D) | |
| Nominal Capacity | 2 Tons | |
| Refrigerant | R-454B | |
| Tube Material | Aluminum | |
| Tube Type | Rifled | |
| Fin Material | Aluminum | |
| Fin Type | Lanced | |
| Certification4 | AHRI, cETLus | |
Navien reserves the right to change specifications at any time without prior notice.
| NAS-Coverage Table for Labor and Parts Only | |||
| Residential2 | Commercial | ||
| Parts1 | Registered3 | 10 Years | 1 Year |
| Non-Registered4 | 5 Years | ||
| Labor | 90 Days | ||
Definitions:
Parts1 – refers to all internal functional components of the unit, except for the Combustion Heat Exchanger
Residential2 – Refers to a Single-Family, residential application.
Registered3 – Refers to coverages for units registered within 60 days of the Commencement date.
Non-Registered4 – Refers to coverages for units registered 61 days or more after the Commencement Date
| Equipment Specifications | |||||||
| Model | Volts/Hz/Phase | Maximum Electric Heat Available (kW) | Transformer Size & Type | Refrigerant Connection (IDS) | Weight (lbs) | ||
| Suction (in) | Liquid (in) | Unit | Shipping | ||||
| NASS24B2T2A1 | 208-230/60/1 | 10 | 40 Va, Class 2 | 3/4 | 3/8 | 105 | 115 |
| NASV24B2T2A1 | 208-230/60/1 | 10 | 40 Va, Class 2 | 3/4 | 3/8 | 106 | 116 |
| NASS36C2T2A1 | 208-230/60/1 | 15 | 40 Va, Class 2 | 3/4 | 3/8 | 120 | 131 |
| NASV36C2T2A1 | 208-230/60/1 | 15 | 40 Va, Class 2 | 3/4 | 3/8 | 121 | 132 |
| NASS48D2T2A1 | 208-230/60/1 | 20 | 40 Va, Class 2 | 7/8 | 3/8 | 167 | 179 |
| NASV48D2T2A1 | 208-230/60/1 | 20 | 40 Va, Class 2 | 7/8 | 3/8 | 168 | 180 |
| NASS59D2T2A1 | 208-230/60/1 | 20 | 40 Va, Class 2 | 7/8 | 3/8 | 169 | 181 |
| NASV59D2T2A1 | 208-230/60/1 | 20 | 40 Va, Class 2 | 7/8 | 3/8 | 170 | 182 |
Note: Weights listed are unit weights with packaging.
| Electric Heat Kit Compatibility | |||
| Size (kW) | Where Used | Maximum Overcurrent Protection (Amps) | Model |
| kW | Application | Amps | Model |
| 0 | NASS24B/NASV24B | 15 | N/A |
| 5 | NASS24B/NASV24B | 35 | NEHV05B |
| 8 | NASS24B/NASV24B | 50 | NEHV08B |
| 10 | NASS24B/NASV24B | 60 | NEHV10B |
| 0 | NASS36C/NASV36C | 15 | N/A |
| 5 | NASS36C/NASV36C | 35 | NEHV05C |
| 8 | NASS36C/NASV36C | 50 | NEHV08C |
| 10 | NASS36C/NASV36C | 60 | NEHV10C |
| 15 | NASS36C/NASV36C | 90 | NEHV15C |
| 0 | NASS48&59D/NASV48&59D | 15 | N/A |
| 5 | NASS48&59D/NASV48&59D | 35 | NEHV05D |
| 8 | NASS48&59D/NASV48&59D | 50 | NEHV08D |
| 10 | NASS48&59D/NASV48&59D | 60 | NEHV10D |
| 15 | NASS48&59D/NASV48&59D | 90 | NEHV15D |
| 20 | NASS48&59D/NASV48&59D | 120 | NEHV20D |
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