Technical Data Sheet · Domestic Split Heat Pump Water Heater
SE-AH … S Series · Domestic Split
SE-AH-5|300S
Split heat pump water heater: compressor and fan outdoors, the 300 L enamel-lined cylinder indoors, only refrigerant between them. Hot water to 55 °C on the heat pump, 75 °C with the heater. R134a, single-phase.
Heating capacity
5kW
Rated, heat pump
COP
4.17
Rated
Storage
300L
Enamelled steel cylinder
Hot water output
107.5L/h
15 → 55 °C, heat pump alone (derived)
Performance
Rated figures, and what they mean in litresRated dutyheat pump mode
- Heating capacity
- 5,000W
- Input power
- 1,200W
- COP
- 4.17
Hot waterderived
- Output, 15 → 55 °C
- 107.5L/h
- Full tank, 15 → 55 °C
- ≈ 2.8h
- Temperature rise
- 40K
Maximumfor the electrician
- Max input power
- 1,780W
- Max current
- 8.2A
- Back-up heater
- 2kW
Technical specifications
SE-AH-5|300S| Parameter | Unit | Specification |
|---|---|---|
| Outdoor unit | ||
| Heating capacity | W | 5,000 |
| Rated input power | W | 1,200 |
| COP | — | 4.17 |
| Maximum input power | W | 1,780 |
| Maximum current | A | 8.2 |
| Power supply | — | 220 V / 1 Ph / 50 Hz |
| Refrigerant | — | R134a |
| Compressor | — | Highly, rotary |
| Noise level | dB(A) | 52 |
| Ingress protection | — | IPX4 |
| Ambient operating range | °C | −5 to 43 |
| Dimensions (L × W × H) | mm | 765 × 260 × 530 |
| Weight | kg | 34 |
| Cylinder | ||
| Storage volume | L | 300 |
| Shell | mm | 2 enamelling-grade steel |
| Lining | — | Vitreous glass enamel, 0.3–0.5 mm |
| Heat exchanger | — | Micro-channel, aluminium alloy, wrapped round the outside of the tank under the insulation |
| Electric back-up heater | kW | 2 |
| Rated working pressure | MPa | 0.7 |
| Inlet / outlet / drain | — | DN 20 |
| Insulation (polyurethane) | mm | 50 |
| Standing loss over 24 h | K | < 6 |
| Size (ø × H) | mm | 560 × 1805 |
| Weight, empty | kg | 90 |
| Fittings | — | Magnesium anode, pressure relief valve |
| Water temperature | °C | 55 on the heat pump · 75 with the heater |
| Controller & warranty | ||
| Controller | — | Intelligent wired controller — shows water temperature, switches the heater; 5 m lead |
| Interconnecting pipe | — | 3 m copper, standard |
| Warranty | — | 2 years heat pump · 5 years cylinder |
Rated figures
- Heating capacity, input power and COP are the manufacturer’s rated figures; the source does not name the ambient they were measured at, so they are published as rated values. Ask us before sizing to a cold-weather duty.
- Derived: hot water output is for a 40 K rise (15 → 55 °C) — heating capacity × 0.86 ÷ output gives exactly 40 K. Full-tank time = volume ÷ output.
Installation requirement
- Dedicated single-phase supply on its own MCB, sized by a licensed electrician for the 8.2 A maximum current, plus the 2 kW heater if on the same circuit.
- 3 m of copper interconnecting pipe is supplied; tell us before ordering if the run or height difference is longer.
- Fit the pressure relief valve supplied and pipe its discharge to a drain.
Site installation schematic
Outdoor unit outside, cylinder inside — only refrigerant crosses the wallHot gas / hot waterLiquid refrigerant returnCold mains waterController lead
- 1Outdoors, heat from the air. The fan draws outdoor air over the coil; the refrigerant picks up its heat even on a cool morning.
- 2Compressed and sent in. The compressor raises the refrigerant’s temperature and sends it through the wall as hot gas.
- 3Heat into the water. The micro-channel wrapped round the outside of the tank gives that heat to the water through the steel — refrigerant and water never meet.
- 4Back out, round again. The cooled liquid returns to the outdoor unit. Nothing but two thin refrigerant lines crosses the wall.
Schematic — not to scale. Mount the outdoor unit where air moves freely; keep the cylinder close to the bathrooms it serves.
Choosing a size
Size on the people and the draw-offThis model
| Hot water per person per day | 40–60 L |
| Suits | about 5–7 people |
| Full tank from cold | ≈ 2.8 h on the heat pump 15 → 55 °C |
| Keeps up with | ≈ 108 L/h of draw-off |
Why split
- The cylinder stands indoors — utility room or loft — while the outdoor unit sits on a balcony or terrace like an air conditioner.
- No hot water runs through the wall, and a refrigerant leak cannot reach the potable water.
- The 2 kW heater covers a cold morning or a full house, and takes the tank to 75 °C when wanted.
The range at a glance
SE-AH-5|300S is marked| Model | Tank L | Heating kW | COP | L/h* | Full tank h* | Heater kW | Cylinder ø × H mm |
|---|---|---|---|---|---|---|---|
| SE-AH-4|150S | 150 | 3.3 | 4.10 | 71 | 2.1 | 1.5 | 500 × 1330 |
| SE-AH-5|200S | 200 | 5 | 4.17 | 107.5 | 1.9 | 1.5 | 500 × 1680 |
| SE-AH-5|300S | 300 | 5 | 4.17 | 107.5 | 2.8 | 2 | 560 × 1805 |
| SE-AH-7|400S | 400 | 7.2 | 4.11 | 154.8 | 2.6 | 2 | 700 × 1590 |
| SE-AH-7|500S | 500 | 7.2 | 4.11 | 154.8 | 3.2 | 2 | 700 × 1940 |
* Derived: hot water output for a 15 → 55 °C rise, and the time to heat a full tank through that rise on the heat pump alone. A 100 L model (SE-AH-4|100S) also sells on the price list; no rated data has been issued for it yet.
Installation steps
Follow in order — fill the cylinder before switching on- Place the cylinder on a level floor that takes its filled weight, close to the bathrooms, with access to the anode and heater.
- Mount the outdoor unit on a bracket or plinth with free air on the coil face and the fan side, where its noise will not disturb anyone.
- Refrigerant lines. Run the copper pair through a sleeved hole in the wall, insulated, without kinks. 3 m is supplied as standard.
- Vacuum and open the service valves as the installation manual describes; check the joints for leaks.
- Water. Cold mains to the bottom inlet through an isolation valve and non-return valve; hot to the taps from the top outlet.
- Relief valve. Fit the supplied valve and pipe its discharge to an open drain — never cap it.
- Electrical. Dedicated single-phase supply and MCB; earth bonded; controller lead (5 m) between the cylinder and the unit.
- Commission. Fill and vent the cylinder before switching on, set the water temperature, and check the unit runs and the tank heats.
Site checklist
What has to be true before the unit arrivesSite
| Floor | Level, and takes ≈ 390 kg filled |
| Cylinder space | 560 × 1805 mm, plus room to service the anode and heater |
| Outdoor unit | 765 × 260 × 530 mm · 34 kg, bracket or plinth |
| Distance | 3 m of refrigerant pipe standard — ask for longer |
| Supply | 220 V single-phase, 8.2 A max + heater |
| Drain | For the relief valve discharge and the cylinder drain |
Protections built in
- High voltage protection
- Compressor over-heating protection
- Hot water over-heating protection
- Circuit failure protection
- Refrigerant high pressure protection
- Refrigerant low pressure protection
Documents & links
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Documentation
Scan to open the latest revision on sunnivaencon.com
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Product videos and customer feedback
SE-AH-5|300S · Technical Data Sheet. Specifications are subject to change without prior notice. ← All Domestic Split models