Nr. Description Part Nr. exploded view & spare parts

Norsup Heat Pump Inverter Silent-Pro Horizontal SG — exploded view & spare parts

This page provides the official exploded-view diagram and complete bill of materials (BOM) for the Norsup Heat Pump Inverter Silent-Pro Horizontal SG range, distributed in the UK and Europe by Bosta under the Norsup brand. The diagram covers the full Silent-Pro Horizontal SG family — including the Silent-Pro 13, 17, 20, 28 and related size variants — sharing a common horizontal chassis with a double-side airflow design that keeps noise levels extremely low and a rotary compressor and titanium condenser. All Norsup inverter model heat pumps are supplied with a Wi-Fi module, and the electronics and refrigerant circuit parts shown here are common across that platform. Use the numbered call-outs on the diagram alongside the parts list below to identify your specific component and its Bosta SKU in a matter of minutes.

Hoe u het genummerde schema kunt gebruiken om uw onderdeel te vinden

Every numbered call-out on the exploded-view diagram corresponds directly to a numbered row in the parts list below the diagram — find the area of the unit where your fault or wear has occurred, then locate the matching call-out number on the diagram. Once you have the position number, read across to the description column to confirm the part name, then use the SKU (where shown) to add the correct item to your basket. Bear in mind that some position numbers may appear in more than one location on the diagram — this is normal where the same component or fastener is used in multiple places on the assembly, so always cross-reference the description as well as the number. A small number of positions in this BOM do not yet carry a stockable SKU; where the SKU field is blank, the component is either a structural panel or enclosure part not currently sold separately — contact us if you need clarification. Note that position 44 in this BOM bundles a capacitor board, colour display, drain hose (L=102 cm, ø=12 mm, grey), and drain outlet hosetail into a single listed group, so read the full description carefully before ordering. The last BOM row references the parent Bosta product family codes (7036145 / 46, 7031957 / 59) for the Silent-Pro Horizontal SG units — these are the complete-unit references, not spare part numbers, and should not be used when ordering individual components.

Main replaceable assemblies on the Norsup Silent-Pro Horizontal SG

The Silent-Pro Horizontal SG is built around several distinct sub-assemblies, all of which are represented in this diagram. The air-movement group centres on position 6 (axial fan blades, SKU 7036939) and position 7 (DC motor, SKU 7036940), supported by the wind deflector component at position 10 and the motor holder component at position 11; as a full inverter heat pump, the unit varies its heating capacity to suit all weather conditions, so the DC fan motor in particular is a wear item worth inspecting regularly. The refrigerant circuit is the heart of the machine and includes the four-way valve at position 17 (SKU 7036941), the electronic expansion valve at position 18 (SKU 7036942), a needle valve at position 20 (SKU 7036944), and two three-way valves at positions 21 and 24 (SKUs 7036945 and 7036948 respectively); the filter at position 19 (SKU 7036943) protects the expansion valve from debris and is a routine service item. Two pressure switches are shown at positions 22 and 23 — the high-pressure switch rated at 3.2 MPa / 4.4 MPa ±0.15 (SKU 7036946) and the low-pressure switch rated at 0.30 MPa / 0.15 MPa ±0.05 (SKU 7036947) — these are critical safety components and must be replaced with exactly the correct rated part. On the water side, position 26 carries the water flow switch (SKU 7036949), which protects the unit from running without adequate flow, and position 27 is the titanium tube heat exchanger (Φ16×7.3 m + Φ12.7×5.7 m, Φ160) at SKU 7036950 — the titanium twisted heat exchanger is resistant to salt and chlorine, making it highly durable in pool water conditions. The electrical enclosure contains the PC1004-G control board at position 33 (SKU 7036951), the driver board at position 38 (SKU 7036956), the relay at position 37 (SKU 7036955), and multiple terminal blocks at positions 34, 35, 36, 40, and 41, along with a filter plate at position 42 (SKU 7036959) and the ZL10 V3-G module at position 43 (SKU 7036960).

Choosing between variants and pack sizes

Several positions in this BOM share a generic description but carry distinct SKUs that reflect different electrical ratings or mechanical specifications — the two pressure switches at positions 22 and 23 are a clear example, where each switch has a unique pressure rating and must not be substituted for the other. Similarly, the three terminal blocks at positions 34, 35, and 36 carry different designations (MSB 2.5-F, MSB 2.5-M, and MSDB 2.5-M respectively), referring to female, male, and double-male configurations; fitting the wrong type will prevent correct electrical assembly. The 3-pole terminal at position 40 (UTD-32/3P, L N PE) and the 5-pole terminal at position 41 (RS9101C-5, rated 450 V~ 4 mm²) also differ in pole count and voltage rating, so confirm your position number before ordering. Where position 44 groups several ancillary items — capacitor board, colour display, drain hose, and drain outlet hosetail — check whether you need the full group or just one of those individual items, as individual accessories such as the drain hose (L=102 cm, ø=12 mm, grey, SKU 7026961) and the hosetail drain outlet (SKU 7026962) may be available to order separately.