Norsup Heat Pump Inverter, Type Silent-Pro Sg (Type 20) exploded view & spare parts

Norsup Heat Pump Inverter Silent-Pro SG (Type 20) exploded view & spare parts

This page provides the full exploded-view diagram and bill of materials for the Norsup Heat Pump Inverter Silent-Pro SG Type 20, Norsup factory reference 7036143. The Silent-Pro SG is a horizontal-format, full-inverter pool heat pump that uses R32 refrigerant, a titanium heat exchanger, and a variable-speed fan to deliver quiet, efficient pool heating. Every position number shown in the diagram corresponds directly to a row in the parts list below, where available SKUs are listed alongside each component description. Whether you are diagnosing a fault, ordering a preventive-maintenance part, or supporting a customer repair, you should be able to identify the component you need within a few minutes of arriving on this page.

How to use the numbered diagram to find your part

Begin by locating the area of the unit where you are working — for example, the airflow section at the top, the refrigerant circuit in the centre, or the electrical box on the right-hand side. Once you have narrowed down the area, find the numbered call-out that points to the component in question; that number matches exactly one row in the parts list table. Read across that row to find the component description and, where one is assigned, the SKU you will need to add to your basket. Bear in mind that some position numbers share a description — positions 27 and 28 are both listed as “Tee-joints”, and positions 35 and 39 are both listed as “Terminal” — so always cross-reference the diagram arrow to confirm you are looking at the correct physical location before ordering. Similarly, positions 10 and 13 both appear as “Support plate”; check which side of the chassis each arrow points to in the diagram. Not every position has an orderable SKU: structural panels, the chassis, the compressor, and several other components are listed for reference only and are not currently available as individual spare parts — if your damaged component falls into this category, please contact us directly for guidance. Finally, note that position 40 carries a longer description that references additional accessories including a colour display (7036171), a PCB controller (7036166), a drain hose (7026961), and a hosetail drain outlet (7026962); those items are listed under their own product entries on the site.

Main replaceable assemblies on the Norsup Silent-Pro SG (Type 20)

The Silent-Pro SG Type 20 is built around four interconnected sub-systems, each of which contains the parts most likely to need attention over the unit’s service life. The airflow assembly sits at the top of the cabinet and comprises the fan blade (pos. 5, SKU 7034064), the fan motor (pos. 8, SKU 7034065), and supporting sheet-metal elements such as the top frame assembly (pos. 9), the fan motor bracket (pos. 11), the wind deflector (pos. 4), and the wind deflector panel (pos. 6); a noisy or non-starting fan points immediately to positions 5 or 8. The refrigerant circuit is the heart of any inverter heat pump: the fin heat exchanger (pos. 14) extracts energy from outdoor air, the titanium tube heat exchanger (pos. 20, SKU 7034074) transfers that energy to pool water, and the reversing valve (pos. 29, SKU 7034069) switches the circuit between heating and cooling modes. Refrigerant pressure is managed by the electronic expansion valve (pos. 23, SKU 7034068), with circuit protection provided by the high-pressure switch (pos. 25, SKU 7034056) and the low-pressure switch (pos. 24, SKU 7034057); the needle valve (pos. 26, SKU 7034058) is used during servicing for refrigerant access. Water-side safety is handled by the water flow switch (pos. 30, SKU 7034059), which prevents the unit from running without adequate water flow. The electrical box (pos. 16) houses the inverter board controller (pos. 34, SKU 7034070), the reactor (pos. 17, SKU 7034066), the relay (pos. 37, SKU 7034061), and various terminals (pos. 35 / SKU 7034071, pos. 36 / SKU 7034060, pos. 39 / SKU 7034072); this is the section to consult for electrical faults or control failures. The user interface is the CP203 module at position 2 (SKU 7034063), the touch-and-display panel through which the owner sets temperature and operating mode.

Choosing between variants and pack sizes

The Silent-Pro SG range spans several output sizes — the Type 20 covered by this diagram sits between the 17 and 28 kW variants in the Silent-Pro SG lineup — so always confirm the type number on your unit’s data label before ordering, as some electrical components differ between output ratings even when the part descriptions look identical. Within this diagram, pay particular attention to the three terminal positions: pos. 35 (SKU 7034071), pos. 36 (SKU 7034060, specified as a 5-pole terminal), and pos. 39 (SKU 7034072) are three distinct parts despite sharing a generic “Terminal” label; fitting the wrong terminal block can result in incorrect wiring connections, so match the position number and SKU precisely. Where a component such as a pressure switch is offered in both high- and low-pressure variants (pos. 25 and pos. 24 respectively), the two are not interchangeable — the switching thresholds and connector configurations are different for each side of the refrigerant circuit. If you are unsure which variant applies to your fault, note the position number from the diagram and quote it alongside the factory reference 7036143 when contacting our support team.