Technical Data Sheet · Monoblock Heat Pump

SE-AH Monoblock Series

SE-AH-4M

Name: Sunniva SE-AH-4M
Brand: Sunniva Encon LLP
SKU: SE-AH-4M

Residential monoblock with the water circulation pump built in — pipe it and plug it in. Hot water to 60 °C, R410A rotary circuit, single-phase, rated from −7 °C ambient. Reversible: hot water in winter, chilled water in summer.

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Heating capacity

3.5kW

At T1 · Rated duty

Peak COP

4.12

At T1 · Rated duty

Max water temp

60°C

Rated outlet 55 °C

Hot water output

105LPH

At T1 · Rated duty

Cooling capacity

2.5kW

In cooling mode · not at the same time as hot water

Cooling COP

2.9

At the rated cooling duty

Performance

Rated output at each published test condition

T1 Rated duty

Heating capacity: 3.5kW
Power input: 0.85kW
COP: 4.12
Hot water output: 105LPH

Technical specifications

SE-AH-4M

Technical specifications for SE-AH-4M
Parameter	Unit	Specification
Electrical supply
Power supply	—	220 V-240 V / 50 Hz / 1 Ph
Rated input power	kW	0.85
Rated current	A	4.07
Required MCB	—	16 A × 2 pole
Required cable	—	3 core × 2.5 sq.mm copper cable + earthing
Refrigeration circuit
Compressor	—	Rotary / GMCC
Number of compressors	Nos	1
Refrigerant	—	R410A
Heat exchanger (condenser)	—	Tube in shell
Throttling device	—	Electronic expansion valve
Fan quantity	Nos	1
Fan input	W	25
Operating ambient range	°C	−7 to 43
Water circuit
Rated water temperature	°C	55
Maximum water temperature	°C	60 / min 7
Water flow	—	Built-in pump
Water pipe size	inch	Rc3/4
Unit & acoustics
Dimensions (L × W × H)	mm	930 × 350 × 550
Net weight	kg	48
Noise at 1 metre	dB(A)	≤ 54

Test conditions

Rated duty — Ambient 30/25 °C (DB/WB)
Heating mode — water in / out 25 / 55 °C
Cooling mode — water in / out 25 / 10 °C

Installation requirement

Dedicated 16 A × 2 pole MCB required at the unit.
Supply cable 3 core × 2.5 sq.mm copper, with separate earthing.
Do not fit a primary circulation pump — it is inside the unit (Sunniva/Shimge). Pipe flow and return straight to the cylinder and fit a Y-strainer on the return.

Built to order

Options available on this model

Options

Water connection — Coupling type to suit the site — threaded, flanged or grooved.
Casing — Stainless steel or powder-coated finish.
Condenser — Stainless steel or copper, in place of the standard build.

How to order them

None of the above is the standard build, and none of it is included in the specification table on this page.
Ask for it at enquiry and have it confirmed in writing on the order acknowledgement. Price, lead time and weight can all change with it.

The table above describes the standard machine. Options are quoted per order and are available across the range except on the All-in-One and Split units.

Site installation schematic

How the unit connects to the tank, pumps and piping on site

Hot waterReturn to heat pumpCold water feedElectrical & control

1Heat pump unit
2RCC foundation with anti-vibration pads
3Insulated storage tank
4Circulation pump — built into the unit
5Y-strainer
6Non-return valve
7Isolation valve (typical)
8Automatic air vent
9Safety / pressure-relief valve
10Tank sensor to heat pump controller
11Drain valve
12Cold water feed
13Hot water to usage points
14Thermometer
15Power supply / MCB panel

Indicative hookup only. Static head, draw pattern and local code may call for additional components — confirm the final scheme with Sunniva before ordering.

Selection & site preparation

Recommended sizing derived from this model’s rated data

System sizing

Storage tank volume	210 – 630 L
Tank sizing rule	Hot water output × 2 to 6 LPH measured at 30 °C ambient, 55 °C water. Indicative range — stay inside it so the tank is neither undersized nor oversized.
Circulation pump	Built into the unit — Sunniva/Shimge. Do not fit a second primary pump: pipe the flow and return straight to the cylinder.
Primary pipe size	25 mm (Rc3/4) to 10 m run; 32 mm beyond
Line insulation	25 mm closed-cell, every line above 45 °C

Civil & electrical

Unit footprint & dry weight	930 × 350 mm · 48 kg
Heat pump plinth	1080 × 500 × 150 mm RCC, M20
Plinth level	100 mm above finished floor, ± 3 mm/m
Tank pad (210 L)	150 mm RCC, 200 mm larger each side ≈ 241 kg filled
Clearances	600 mm air-on · 1000 mm above fan · 800 mm service side
Electrical	16 A × 2 pole MCB · 3 core × 2.5 sq.mm copper cable + earthing

Installation steps

Follow in order — a commissioning engineer should sign off before start-up

Cast the RCC plinth 1080 × 500 × 150 mm in M20 concrete, 100 mm above finished floor. Let it cure and check it is level within 3 mm per metre.
Set the unit down on anti-vibration pads. Keep 600 mm clear at the finned coil faces and 1000 mm above the fan — the unit must breathe or capacity drops.
Place the tank on its own level pad, as close to the heat pump as the site allows. Short pipes lose less heat.
Pipe tank bottom → isolation valve → Y-strainer → primary pump → heat pump inlet, in that order. Fit the non-return valve after the pump.
Pipe the heat pump outlet → tank top inlet. Fit an isolation valve at each end so the unit can be serviced without draining the tank.
Fit the automatic air vent and the safety valve on the tank top. Pipe the safety valve discharge to an open drain — never cap it.
Bring the cold water feed into the tank bottom through an isolation valve and a non-return valve.
Fit the tank sensor into the tank pocket and run its cable back to the heat pump controller. Do not run it alongside the power cable.
Insulate every hot line with 25 mm closed-cell insulation, pump body included.
Power the unit from a dedicated 16 A × 2 pole MCB using 3 core × 2.5 sq.mm copper cable + earthing.
Fill and vent the system fully. Confirm the flow switch stops the unit when the pump is off, then start.

Process & instrumentation diagram

Refrigeration circuit, instrumentation and water connections

Discharge — compressor to valveSuction — valve to compressorReverses with the modeLiquid line, either directionWater circuitAir flowTTTemperature transmitterPSPressure switch (HP / LP)FSWater flow switch

Instrument schedule

Tags as marked on the diagram above

Tag	Device	Function
TT 01	Compressor discharge temperature	Discharge superheat & high-temperature cut-out
TT 02	Compressor suction temperature	Suction superheat monitoring
TT 03	Water outlet temperature	Set-point control
TT 04	Water inlet temperature	Return water sensing, ΔT calculation

Tag	Device	Function
TT 05	Air coil temperature	Defrost initiation and termination — the coil frosts below roughly 5 °C ambient
PS HIGH	High-pressure switch	Discharge over-pressure cut-out
PS LOW	Low-pressure switch	Loss-of-charge / low-suction cut-out
FS 01	Water flow switch	Interlock — no-flow lockout

Cabinet reference drawing

Typical general arrangement — this model’s own dimensions alongside

Dimensions (L × W × H)930 × 350 × 550 mm

Net weight48 kg

The general-arrangement drawing for the monoblock cabinet is not published yet. The dimensions and net weight above are this model’s own, off its data sheet; ask Sunniva for a dimensioned drawing before cutting an opening or fabricating a bracket.

COP characteristic

Full performance map across the operating envelope

COP · heating duty COP against ambient temperature, one curve per hot-water outlet temperature

COP (kW/kW) by ambient temperature and hot-water outlet temperature
COP · hot water ↓ / Ambient °C →	-7	7	10	15	20	25	30	35
45 °C	2.68	3.68	3.92	4.19	4.47	4.68	4.91	5.15
50 °C	2.45	3.37	3.59	3.84	4.09	4.29	4.49	4.72
55 °C	2.25	3.09	3.29	3.51	3.75	3.92	4.12	4.32
60 °C	2.03	2.79	2.98	3.18	3.39	3.56	3.73	3.92

How to read this

Shape from the R410A air-to-water map; level set to this model’s own rated COP of 4.12 at 30 °C ambient and 55 °C water, and cut off at the −7 °C ambient this range is rated to. The figure on page 1 is the measured one; this map is how the circuit behaves around it, not a second measurement.
Where a figure on this map differs from the rated point on page 1, the map governs — it is measured across the full operating envelope, while the rated point is a single certified test condition.