Nr. Description For exploded view & spare parts

Bosta ECO 8 & ECO 10 heat pump exploded view & spare parts

This page hosts the official exploded-view diagram and full bill of materials for the Bosta ECO 8 and ECO 10 swimming pool heat pumps — two closely related on/off models that share the same chassis and the majority of their components. The diagram reference for this parts set is 7008314. Because the ECO 8 and ECO 10 differ primarily in the capacity of a small number of key components (evaporator, compressor and titanium heat exchanger), both models are covered by a single diagram with lettered variants (a/b) at those positions. Using the numbered call-outs alongside the parts list below, you should be able to pinpoint the exact part you need within minutes.

Comment utiliser le schéma numéroté pour trouver votre pièce

Every number printed on the exploded-view diagram corresponds directly to a row in the parts table beneath it. The most reliable workflow is to start by identifying the area of the unit where your fault lies — for example, the electrical box, the refrigerant circuit, or the water circuit — and then locate the relevant call-out numbers in that area of the drawing. Once you have a position number, find the matching row in the table to confirm the description and, where available, the SKU you need to order. Be aware that some position numbers appear more than once on the drawing: position 27 and position 32 are both listed as “Water connection nut” (SKU 7014126) because the same nut is used at both the inlet and outlet — ordering the correct quantity is your responsibility, not just the correct part. Pay close attention to lettered suffixes: positions 3a/3b, 21a/21b, and 34a/34b each indicate a component that is specific to either the ECO 8 or the ECO 10 — selecting the wrong letter will result in a part that does not fit or does not match the refrigerant capacity of your unit. If you are unsure which variant you own, check the model designation on the nameplate before ordering. Positions marked with a quantity of “1” in the description are single-item structural or casing parts; where no SKU is shown, that part is not currently sold individually through this listing.

Main replaceable assemblies on the Bosta ECO 8 & ECO 10

The refrigerant circuit forms the heart of both models. The compressor (positions 21a for the ECO 8, 21b for the ECO 10) drives refrigerant through the system, while the capillary assembly at position 38 acts as the expansion device between the high- and low-pressure sides. High and low pressure are independently monitored by dedicated protection switches at positions 37 and 43 respectively, allowing the unit to shut down safely if operating limits are exceeded. The titanium heat exchanger (positions 34a/34b) is where refrigerant energy is transferred to the pool water; titanium construction makes it resistant to both chlorinated and salt-treated water. On the air side, the fan motor at position 6 (25 W, SKU 7010521) draws ambient air across the evaporator (positions 3a/3b), and is fitted with the 400 mm × 118 mm fan blade at position 7 (SKU 7010538). The electrical box assembly — comprising the electric box (position 20), its cover (position 11), the PC board ZL 6671 at position 12 (SKU 7010512), the 2 µF capacitor at position 14 (SKU 7010416), and the larger 60 µF capacitor at position 16 (SKU 7010433) — handles all switching and control functions. The thermostat at position 30 (SKU 7010517) and the mechanical switch at position 31 (SKU 7010516) provide operator control, while the PC board communicates with three temperature sensors: the water-in sensor at position 36 (SKU 7010534), the pipe sensor at position 41 (SKU 7010533), and the ambient air sensor at position 48 (SKU 7010537). Water flow through the heat exchanger is confirmed by the flow switch at position 46 (SKU 7010531), and system pressure is displayed on the pressure gauge at position 29 (rated 5.5 mPa / 100 °C, SKU 7010518). The water connections are made via the inlet bolt (position 28, blue) and outlet bolt (position 33, red), each secured with a water connection nut at positions 27 and 32 (both SKU 7014126).

Choosing between variants and pack sizes

The three lettered variant pairs in this diagram — evaporator (3a/3b), compressor (21a/21b), and titanium heat exchanger (34a/34b) — are the only positions where the ECO 8 and ECO 10 diverge; every other numbered component is common to both models. Before ordering any of these three assemblies, confirm your exact model from the unit’s nameplate, as these components are sized and matched to the refrigerant charge and thermal output of their respective model and are not interchangeable between the two. The water connection nut (SKU 7014126) appears at both positions 27 and 32, so if you are replacing both water connections at the same time, you will need to order two units. Although no screw packs or fastener kits are listed as individual SKUs in this BOM, always cross-reference the position number and description carefully before adding items to your basket, as a position number quoted without its letter suffix (for example, “21” instead of “21a”) is ambiguous and may result in the wrong part being dispatched.