Dometic Blizzard NXT H540315 Air Conditioner Instruction Manual
Dometic Blizzard NXT H540315 Air Conditioner
Dometic Blizzard NXT H540315 Instructions
Here we offer the Dometic Blizzard NXT H540315 Air Conditioner manual completely free and in English. We have cataloged this manual in the Air Conditioners section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Dometic Blizzard NXT H540315 Air Conditioner, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
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Dometic Blizzard NXT H540315 Air Conditioner Specifications
| Feature | Specification |
|---|---|
| Model Number | H540315.72X (Blizzard NXT) |
| Product Type | Roof top RV air conditioner (OEM installation) |
| Nominal Cooling Capacity | 13,500 BTU/hr |
| Electrical Rating | 120 Vac, 60 Hz, 1 phase |
| Compressor Rated Load Amps | 12.7 A |
| Compressor Locked Rotor Amps | 68.0 A |
| Fan Motor Rated Load Amps | 2.8 A |
| Fan Motor Locked Rotor Amps | 8.0 A |
| Refrigerant | R-410A, 19.5 oz |
| Minimum Wire Size | 12 AWG copper, for runs up to 24 ft |
| AC Circuit Protection | 20 A time delay fuse or circuit breaker (supplied by installer) |
| Minimum Generator Size | 3.5 kW (1 unit) / 5.0 kW (2 units) |
| 12 Vdc Supply Wire | Dedicated 18-22 AWG wire from converter (filtered side) or battery |
| Roof Opening | 14-1/4″ x 14-1/4″ (±1/8″) |
| Roof Rafter/Joist Spacing | 16 inch centers minimum |
| Roof-to-Ceiling Distance | 2 in. minimum, 5 in. maximum |
| Maximum Installation Tilt | 15° (all directions) |
| Roof Load Requirement | 130 lb with RV in motion (approx. 200 lb static load design) |
| Opening Framing Stock | 3/4″ minimum thickness |
| Return Air Grille Kits | 3105007.XXX or 3105935.XXX |
| CCC 2 Electronic Control Kit | 3312020.000 |
| CCC 2 Thermostat | 3314082.000 (Black), 3314082.011 (White) |
| Optional Indoor Temperature Sensor (CCC 2) | 3311931.000 (20′), 3311931.012 (40′), 3311931.020 (60′) |
| LCD SZ Electronic Control Kit | 3313189.000 C/F-White, 3313189.015 C/F-Black |
| LCD SZ Thermostat | 3313192.000 C/F-White, 3313192.019 C/F-Black |
| Duct Cross Sectional Area | 21.0 sq. in. minimum |
| Duct Depth | 1-1/2 in. min. to 2-1/2 in. max. |
| Duct Width | 7.0 in. min. to 10.0 in. max. |
| Total Duct Length | 15.0 ft min. to 40.0 ft max. (short run = 1/3 of total length) |
| Supply Registers | 4 minimum, 14.0 sq. in. free air area each |
| Return Register Free Air Area | 40.0 sq. in. minimum (filter included) |
| Register Distance From Duct End | 5.0 in. min. to 8.0 in. max. |
| Register Distance From Elbow | 15.0 in. |
| Total System Static Air Pressure | 0.55 to 1.10 in. W.C. (high blower speed, filter and grille in place) |
| Duct Insulation | R-7 minimum |
| Mounting Bolts | 4 bolts, torqued evenly to 40-50 in-lb |
| Roof Gasket Compression | Approximately 3/4″ |
| Return Air Cover Screws | Six #8 x 3/8″ blunt point Phillips head |
| Furnace Thermostat Wires | Two 18 gauge wires |
| Thermostat Mounting Height | 54″ above the floor |
| Applicable Codes | ANSI/NFPA 70, ANSI/NFPA 1192, CSA C22.1, CSA Z240 RV Series |
| Manual Form Number | 3316207.000 Revision A (09/16) |
Dometic Blizzard NXT H540315 Details
The Dometic Blizzard NXT H540315 is a roof top air conditioner built for RV manufacturers to install while the vehicle is being built. All initial installations must be approved by Dometic Corporation. The manual says one person can do most of the work, with brief help from others when lifting the unit onto the roof. Dometic warns that the unit must not be modified in any way, and only accessories authorized in writing by Dometic may be added.
Location affects performance. For a single unit, Dometic recommends mounting it slightly forward of center (front to back) and centered from side to side. For two units, one goes one third and the other two thirds of the way back from the front of the RV. Before cutting, installers should look for obstructions both on the roof and inside the RV, such as door openings, room dividers, curtains and ceiling fixtures that could block the return air grille.
Roof preparation includes safety steps: shut off the gas supply, disconnect 120 Vac power and disconnect the positive 12 Vdc battery terminal before drilling or cutting. Installers must never create a low spot on the roof, because pooled water can leak in. The opening is framed so it does not collapse when the unit is bolted down and does not draw air from the roof cavity. Leave an entrance hole at the front of the opening for the wiring.
The ducting must hold its shape during and after installation, and it must be insulated and sealed to prevent condensation. Return air has to be filtered so dirt does not build up on the cooling coil. Dometic recommends a basic duct configuration based on its testing. The installer is still responsible for choosing duct size, layout, register size, register location and thermostat location for each floor plan. Other configurations need written approval from Dometic.
Two control platforms are supported. The CCC 2 (Comfort Control Center 2) uses a 4 conductor communication cable with RJ-11-6C4P connectors. It can manage up to four zones and works with an optional indoor temperature sensor, an Energy Management System load shed input and an Automatic Generator Start kit. The LCD SZ single zone system uses a 3 conductor cable wired to the 12V+, 12V– and COMMS terminals on the thermostat.
Installation inside the RV includes fitting a divider plate. The perforated tab is removed when the ceiling-to-roof thickness is 2.0″ to 3-3/4″. A self-adhesive insulation strip measuring 1/8″ x 7″ x 18″ seals the plate so cold discharge air does not flow back into the return. If the divider plate is installed incorrectly, the compressor can quick-cycle. The freeze control sensor goes into the evaporator fins about 2-1/2″ up from the bottom and 2-1/2″ in from the right side.
The electronic control box is configured with dip switches for zone assignment, heat pump and furnace options. Ext. Stage, Stage, Heat Strip, Dehumidify and Gen Start stay OFF on this unit. On CCC 2 systems, a reset (pressing MODE and Zone together) registers the configuration. The furnace or Aqua differential can be set to 1°F or 2°F. To reduce heat gain, Dometic suggests parking in shade, using window shades, starting the unit early and running it on High Fan/Cooling.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Dometic Blizzard NXT H540315 Air Conditioner, and we answer them below.
