Water Source Heat Pump Manufacturer Evaluation for Project Buyers

For load calculations, source-loop assessment, hydraulic design and equipment selection, begin with CASSKY’s Water and Ground Source Heat Pump System Design Guide.

This article addresses a different decision: how should distributors, EPC contractors, consultants and project buyers evaluate water source heat pump manufacturers before approving a supplier?

A product catalogue can establish a preliminary range. However, it does not prove that the supplier controls production, tests the offered model, holds applicable certification, meets the required schedule or can support installed units after shipment.

Therefore, supplier approval should examine six evidence areas:

Factory and production capability
Performance and safety testing
Exact-model certification
Manufacturing quality control
MOQ and delivery capability
Spare-parts and after-sales service

The objective is not to identify the supplier with the most certificates or the lowest unit price. Instead, it is to determine whether the supplier can repeatedly deliver the approved product configuration and support it throughout the project.

What Project Buyers Need to Verify

Different buyers face different risks.

Buyer	Primary concern	Evidence needed
Distributor or importer	Can the supplier deliver a repeatable product line for the destination market?	Product range, compliance scope, MOQ, lead time, private-label controls and spare-parts plan
EPC contractor	Will the equipment integrate with the source loop, building water system and controls?	Exact-model performance data, hydraulic information, wiring, BMS points and commissioning support
Consulting engineer	Are published ratings applicable to the project conditions?	Test standard, rating conditions, performance maps and measurement boundary
Project developer	Can the supplier maintain delivery, quality and lifecycle support?	Factory capacity, quality plan, schedule, warranty and service process
Procurement team	Are quotations commercially and technically comparable?	Defined supply scope, Incoterm, production schedule, inspection plan and document register
OEM brand owner	Can product changes be controlled across repeated orders?	Approved BOM, drawings, firmware, labelling, packaging and engineering change procedure

In addition, buyers should distinguish a manufacturer from a trading company that does not control design, production or serial-number records. A trading company can still provide value. However, its role, authority and access to the original factory must be clear.

CASSKY’s Public Manufacturer Positioning

CASSKY’s public company information states that the business was founded in 1996 and combines product development, manufacturing, quality control and technical support. Its website shows a manufacturing base, heat-pump assembly line, automated production equipment and customer factory visits. It also lists water and ground source heat pumps among its manufactured product categories. CASSKY company and factory overview

The public CASSKY All-in-One Water / Ground Source Heat Pump page identifies an indoor water-to-water platform for heating, cooling and domestic hot water. Its preliminary series data include:

Parameter	Public series reference	Evidence boundary
Heating capacity	6–30 kW	Series range; exact model required
Cooling capacity	5–26 kW	Series range; exact model required
Maximum heating outlet water	Up to 60°C	Model and operating-condition dependent
Minimum cooling outlet water	Down to 7°C	Model and operating-condition dependent
Reference heating COP	Up to 4.8 at B0/W35	Reference test point, not seasonal project performance
Reference cooling EER	Up to 5.2 at W30/W7	Reference test point, not every model or condition
Source side	Ground loop or qualified water loop	Source design remains project-specific
Power supply	220–240 V single phase or 380–415 V three phase	Depends on model
Communication	RS485/Modbus RTU options	Exact controller and point list require confirmation

These public facts support initial supplier screening. Nevertheless, they do not establish a fixed MOQ, monthly capacity, lead time, exact-model certificate, laboratory accreditation, warranty term, spare-parts availability or after-sales SLA.

Those items must be requested and made part of the quotation or contract.

First Confirm Product-Family Fit

Before auditing the factory, confirm that the supplier’s product architecture matches the project.

Water source heat pumps are not one uniform category. The required product may be:

Water-to-air
Brine-to-air
Water-to-water
Brine-to-water
Water-loop heat pump
Groundwater heat pump
Closed-loop ground source heat pump
Heating-only, cooling-only or reversible
Fixed-speed or inverter-driven
Single-phase or three-phase
Standalone or multi-unit staged

A factory experienced with small water-to-air units does not automatically have the design, testing or controls capability required for a central water-to-water plant.

Likewise, a unit rated at one source-water temperature may not be suitable across every water-loop or ground-loop condition. ISO 13256-1:2021 specifically notes that equipment rated for one liquid-temperature range may not suit all ranges covered by the standard.

Therefore, send the supplier the project conditions before evaluating price or production readiness.

Product-Fit Inputs for Supplier Review

Input	Required project information	If unavailable
Application	Space heating, cooling, DHW or combined duty	Buyer to confirm
Heat-pump type	Water-to-air or water-to-water	Engineer to confirm
Source type	Ground loop, groundwater or engineered water loop	Buyer to confirm
Source entering temperature	Minimum, normal and maximum	To be measured or calculated
Source fluid	Water or defined antifreeze mixture	Designer to confirm
Source flow	Design and allowable range	Engineer to calculate
Load-side temperatures	Entering and leaving temperatures in each mode	Designer to confirm
Heating and cooling loads	Peak loads at stated design conditions	Engineer to calculate
Domestic hot water	Daily demand, peak demand and storage arrangement	Buyer to confirm
Electrical supply	Voltage, phase and frequency	Site data required
Installation location	Indoor conditions, drainage and service clearances	Site data required
Controls	Local controller, remote access and BMS protocol	Buyer to confirm
Quantity	Sample, pilot, project batch and annual forecast	Buyer to confirm
Destination market	Country and applicable conformity requirements	Buyer to confirm
Project schedule	Required approval, shipment and commissioning dates	Buyer to confirm

Verify the Legal Manufacturer and Production Site

A supplier should identify the legal entity responsible for:

Product design
Manufacturing
Export sales
Certificate ownership
Warranty obligations
Technical support
Spare-parts supply

These entities may be different. If so, the relationship and responsibilities should be documented.

Next, verify the production-site address. A company registration or office address does not prove that the supplier controls the factory shown in marketing photographs.

Useful evidence includes:

Factory business licence
Production-site address
Organisation chart
Production-process map
Equipment list
Recent factory video with identifiable production areas
Live remote factory audit
On-site buyer audit
Sample serial-number records
Calibration register
Approved supplier list
Nonconformance and corrective-action procedure
Finished-goods and spare-parts storage areas

Aerial photographs and assembly-line images support site identification. However, they do not prove production volume, model-specific experience or process control.

Audit Real Production Capacity

A statement such as “10,000 units per year” is incomplete unless the buyer knows:

Which product families are included
Whether the figure is installed capacity or actual output
Number of shifts
Working days
Line changeover time
Bottleneck process
Test-station capacity
Seasonal workload
Outsourced operations
Component constraints
Current committed orders

Ask the supplier to calculate capacity for the relevant platform.

For example:

Monthly available capacity = units per shift × shifts per day × working days × planned utilisation

However, the result must also pass through the testing bottleneck. An assembly line that can build 40 units per day does not provide 40 finished units per day if the performance-test station can process only ten.

Therefore, request separate figures for:

Mechanical assembly
Refrigeration work
Evacuation and refrigerant charging
Electrical assembly
End-of-line testing
Packing and loading

All capacity values should be stated as “supplier to confirm” until supported by production records.

Separate Factory Testing from Third-Party Certification

Heat pump quality inspection area at the CASSKY manufacturing facility

Several evidence types are often treated as interchangeable. They are not.

Evidence	What it establishes	What it does not establish
Development test	Engineering data from a prototype or selected unit	Conformity of every production unit
Type test	Performance or safety of the tested sample under stated conditions	Unchanged mass production or project performance
Third-party product certification	Conformity of listed models within the programme scope	Models, voltages or configurations outside the listing
Factory end-of-line test	Production checks on an individual serial-numbered unit	Full performance map or independent certification
ISO 9001 certificate	Quality-management-system scope at the listed organisation and site	Product performance or safety
Laboratory accreditation	Laboratory competence for methods included in the accreditation scope	Product certification outside that scope
FAT	Contract tests witnessed before shipment	Site installation quality
Commissioning report	Installed functions under recorded site conditions	Performance at untested seasonal conditions

Consequently, a factory test report should never be described as a product certificate unless it is issued through an applicable certification programme.

Review Performance-Test Capability

For water-to-water and brine-to-water products, ISO 13256-2:2021 establishes performance testing and rating criteria for factory-made electrically driven heat pumps.

For water-to-air and brine-to-air products, the relevant international performance standard is ISO 13256-1:2021.

A water-to-water test facility should be able to control and measure, as applicable:

Source entering and leaving fluid temperatures
Load entering and leaving water temperatures
Source-side flow
Load-side flow
Fluid composition
Electrical voltage and frequency
Compressor and total unit input power
Heating or cooling capacity
COP or EER
Water-side pressure drop
Steady-state criteria
Data-recording interval
Instrument uncertainty

Ask for a sample test report from a model comparable to the proposed unit. The report should identify the model, serial number, test method, fluid, temperatures, flows, voltage, capacity, input power and efficiency calculation.

A report showing only “passed” is inadequate for engineering review.

Check Calibration and Laboratory Scope

A factory can maintain a useful development laboratory without holding accredited status. However, the supplier must describe the evidence correctly.

ISO/IEC 17025:2017 provides requirements for laboratory competence and valid test results. Therefore, if a supplier claims that a laboratory is accredited:

Request the accreditation certificate
Verify the laboratory name and address
Check the accreditation body
Review the current validity
Read the technical scope
Confirm that the required heat-pump test method is included
Check whether the tested temperature and capacity range is covered

An ISO/IEC 17025 certificate without a relevant technical scope does not validate the heat-pump test.

For a non-accredited factory laboratory, request:

Instrument list
Calibration certificates
Calibration due dates
Measurement uncertainty
Test method
Staff competence records
Correlation data against an independent laboratory

This evidence can support engineering confidence. Nevertheless, it remains different from accredited third-party testing.

Verify Certification by Exact Model

Certification should be checked against the offered product, not the manufacturer’s general brand name.

The verification record should include:

Certificate holder
Manufacturing site
Exact model number
Model family or covered series
Voltage and frequency
Refrigerant
Controller or critical configuration
Applicable standard and edition
Certification-body name
Issue and expiry dates
Current status
Public directory record, where available

The AHRI Directory of Certified Product Performance allows buyers to search certified product information by manufacturer, model and rating.

AHRI’s water-source heat-pump programme covers defined production models and verifies ratings such as heating capacity, cooling capacity, COP and EER. Its public programme page currently references the 1998 editions of ISO 13256-1 and ISO 13256-2, while ISO has published 2021 editions. Therefore, buyers must check the edition required by the certification programme, tender and destination market instead of assuming that every organisation uses the latest ISO edition. AHRI WSHP programme scope

Keep Performance and Safety Certification Separate

ISO 13256 addresses performance testing. It is not an electrical-safety certification.

Where applicable to the product and market, IEC 60335-2-40:2024 with Amendment 1:2026 addresses safety requirements for electric heat pumps, air conditioners and dehumidifiers within its scope.

However, citing an IEC standard does not prove that a product is certified to it. Request the certificate or report, identify the certification body, and confirm that the exact model and market variant are covered.

Furthermore, local requirements may include:

Electrical-safety certification
Electromagnetic-compatibility testing
Refrigerant safety
Pressure-equipment requirements
Energy-labelling requirements
Radio or telecommunications approval
Building and fire requirements
Drinking-water requirements for DHW circuits

The destination-market compliance matrix should be completed before the production configuration is frozen.

Verify the Quality-Management Certificate Correctly

As of 2026, ISO has published ISO 9001:2026, replacing the 2015 edition, with a transition period for existing certified organisations. Therefore, buyers should verify the certificate’s edition, scope, site, certification body, accreditation and transition status. ISO 9001:2026 information

ISO also makes an important distinction: ISO 9001 applies to the organisation’s quality management system. It does not certify the heat pump itself.

When a supplier claims ISO 9001 certification:

Obtain the complete certificate
Match the legal company name
Match the manufacturing address
Check the activity scope
Check the expiry and suspension status
Verify the issuing certification body
Search the record in IAF CertSearch where available

A certificate covering “sales of HVAC products” does not necessarily cover design and manufacture at the factory under review.

Define the Production Quality Plan

A repeatable product requires more than final inspection.

Ask the supplier for an inspection and test plan covering the following stages.

Incoming material control

Require controls for:

Compressor identity and specification
Heat-exchanger model and material
Circulation pump
Inverter and controller
Sensors
Valves and flow protection
Electrical protection devices
Copper tubing
Refrigerant
Insulation and cabinet parts

The approved BOM should identify critical suppliers and permitted alternatives.

Refrigeration-process control

The factory should define procedures and acceptance limits for:

Brazing
Joint inspection
Pressure testing
Leak detection
Evacuation
Moisture control
Refrigerant charging
Charge verification
Refrigerant identification

The audit should examine actual records, not only written procedures.

Water-circuit control

Verify procedures for:

Heat-exchanger pressure testing
Internal piping inspection
Pump and valve installation
Water-side leak testing
Flow-switch operation
Sensor position
Insulation and condensation control
Drainage where applicable

Electrical and control inspection

The production record should cover:

Component identity
Cable routing
Terminal torque
Earthing continuity
Insulation or dielectric tests where applicable
Supply voltage and phase
Controller version
Input and output checks
Protection and alarm functions
Communication interface

End-of-line testing

Define whether each unit receives:

Visual inspection
Leak test
Electrical-safety check
Controller and display check
Pump and valve check
Heating operation
Cooling operation
Sensor plausibility check
Alarm simulation
Communication test
Serial-numbered test record

A brief operational run is not the same as a full ISO 13256 performance test. That distinction should appear in the quality plan.

Require Serial and BOM Traceability

Each delivered unit should be traceable to:

Model
Serial number
Production date
Approved BOM revision
Refrigerant and charge
Compressor
Controller and firmware
Inverter
Test result
Inspector
Packaging record
Shipment

For OEM orders, the buyer should also approve:

Brand and logo files
Nameplate
Rating data
Model-number logic
Controller language
Manual revision
Wiring diagram
Packaging
QR codes
Spare-parts labels

If a compressor, heat exchanger, controller or refrigerant changes, the supplier should follow an engineering change process. The buyer should define which changes require notice and which require written approval or retesting.

Evaluate MOQ by Configuration

There is no responsible way to publish one universal CASSKY MOQ for every water source heat pump project. MOQ depends on the model, voltage, branding and engineering scope.

Use the following structure in the RFQ:

Order type	Main MOQ driver	Required supplier response
Standard model, standard brand	Existing production and material batch	MOQ and sample availability to be confirmed
Standard model with private label	Labels, nameplates, packaging and manuals	MOQ by customization item to be confirmed
Controller-language change	Software work and validation	Engineering charge, MOQ and approval time to be confirmed
Different voltage or frequency	Components, testing and certification scope	Technical feasibility and MOQ to be confirmed
Cabinet or hydraulic modification	Tooling, drawings, BOM and retesting	Development MOQ and non-recurring cost to be confirmed
New refrigerant configuration	Refrigeration design, safety review and compliance	Separate engineering approval required
Pilot project	Sample build and additional support	Pilot quantity and commercial conditions to be confirmed
Annual distributor programme	Forecast, call-off batches and stock commitment	Annual MOQ and batch MOQ to be negotiated

A low MOQ is not automatically favourable. If the order is too small to use controlled repeat-production processes, the buyer may receive a one-off configuration with weak spare-parts continuity.

Audit Lead Time as a Schedule

“Lead time: 30 days” is incomplete unless the starting and ending events are defined.

The agreed lead time should state whether it begins after:

Deposit payment
Signed contract
Technical sheet approval
OEM artwork approval
Sample approval
Certificate confirmation
Final BOM release

It should also state whether it ends at:

Production completion
FAT acceptance
Factory dispatch
Port loading
Arrival at destination
Delivery to site

Use a milestone schedule:

Milestone	Evidence	Responsibility
Technical requirements frozen	Signed technical schedule	Buyer and supplier
OEM files approved	Artwork and document register	Buyer
Long-lead components secured	Supplier confirmation or material plan	Supplier
Production slot reserved	Approved production schedule	Supplier
Assembly completed	Serial-number list	Supplier
Factory tests completed	Test and inspection records	Supplier
FAT closed	Signed FAT report and punch-list closure	Buyer and supplier
Export documents ready	Packing list, invoice and required shipping files	Supplier
Goods dispatched	Shipping record	Supplier or logistics provider

Request separate figures for production lead time and transport time.

Moreover, require the supplier to identify schedule risks such as compressor availability, controller changes, local holidays, certification work and custom packaging.

Make the FAT Proportional to Risk

A factory acceptance test should not become a ceremonial start-up demonstration.

For a water-to-water project, an agreed FAT can include:

Model and serial-number verification
BOM spot check
Nameplate and label review
Dimensions and connection positions
Visual workmanship
Electrical-safety records
Leak and pressure-test records
Controller and firmware verification
Heating operation at an agreed condition
Cooling operation where applicable
Entering and leaving temperatures
Source and load flows
Input power
Calculated capacity and COP
Low-flow protection
High- and low-temperature protection
Alarm logging
Modbus or BMS communication
Remote-monitoring function
Packaging inspection
Document-register review

If the factory cannot reproduce the project condition, define an alternative test point and an agreed method for interpreting the result.

A FAT verifies the product before shipment. It does not replace commissioning of the installed ground loop, water source, pumps, valves, tanks and controls.

Evaluate Spare-Parts Capability

The buyer should request a model-specific spare-parts list before the order.

Classify parts by operational impact:

Spare-parts class	Typical examples	Buyer requirement
Commissioning spares	Sensors, fuses, communication accessories and selected seals	Supplier to recommend by project quantity
Critical electronic spares	Main PCB, display, communication board and inverter controls	Part number, firmware and compatibility to be confirmed
Hydraulic spares	Pump, valve actuator, flow switch and pressure sensor	Exact model and connection data required
Refrigeration spares	Expansion device, pressure switch and selected service components	Qualified-service requirement to be defined
Major components	Compressor and heat exchangers	Availability, replacement procedure and lead time to be confirmed
Routine service items	Filters, strainers, seals and consumable protection items	Local stock level and replacement interval to be proposed

For every critical part, request:

Part number
Applicable heat-pump models
Revision compatibility
Unit price
Stock location
Normal dispatch lead time
Emergency dispatch option
Shelf-life or storage conditions
Recommended distributor stock
Obsolescence-notification period
Substitution approval process

A statement that “spare parts are available” is not an inventory plan.

Convert After-Sales Support into an SLA

CASSKY’s support page asks service users to provide the product model, serial number, installation date, fault code, operating mode, water temperatures and supporting photographs. This is a useful diagnostic input structure. The same page states that model-specific manuals, wiring diagrams, CAD files and compliance documents can be requested after the configuration is confirmed. CASSKY support and document centre

However, a support channel is not the same as a contractual service-level agreement.

The following is an illustrative buyer requirement, not a CASSKY commitment:

Severity	Example	Proposed initial-response target	Required next step
P1 critical	No heating, freeze risk or repeated protective shutdown	Within 4 business hours	Remote diagnostic session and containment plan
P2 major	Reduced capacity, one unit unavailable in a multi-unit plant	Within 1 business day	Diagnosis, parts decision and recovery plan
P3 routine	Noncritical alarm, monitoring or documentation issue	Within 2 business days	Written technical response
P4 information	Settings, drawings or spare-parts enquiry	Within 3 business days	Document or commercial response

The supplier should accept, reject or revise each target during contract negotiation.

The final SLA should define:

Support hours and time zone
Working-day calendar
Service languages
Email, phone and messaging channels
Escalation contacts
Required evidence for opening a case
Remote-access method
Initial-response time
Diagnostic-action time
Spare-parts dispatch time
On-site support availability
Responsibility for labour and travel
Case-record format
Closure and recurring-failure process

Do not describe a general sales-response promise as a technical after-sales SLA.

Request Warranty Terms Before Comparing Prices

Warranty comparisons should identify:

Start date
Complete-unit warranty
Compressor coverage
Heat-exchanger coverage
Controller and inverter coverage
Labour coverage
Travel coverage
Refrigerant coverage
International freight
Replacement-part installation
Commissioning requirement
Water-quality requirements
Flow and temperature limits
Remote-connectivity requirements
Maintenance records
Exclusions
Claim approval process
Repeated-failure remedy

Water quality deserves particular attention. Groundwater or open-loop operation can expose heat exchangers to sediment, scaling, corrosion and biological fouling. The contract should state the permitted water conditions and any requirement for an intermediate heat exchanger.

A warranty may be valid only when those requirements are followed.

Manufacturer Evaluation Scorecard

The following scorecard is a buyer-created screening tool, not an industry certification.

Evaluation area	Weight	Minimum evidence
Product and project-condition fit	15	Exact-model performance at relevant conditions
Factory identity and production control	15	Verifiable site, processes and model experience
Test capability	15	Test method, instruments, calibration and sample reports
Exact-model compliance	15	Current documents covering the destination-market variant
Quality and traceability	10	ITP, serial records, BOM and change control
MOQ and lead time	10	Configuration-specific commitments and milestone schedule
Spare parts and after-sales	10	Parts list, support route and negotiated SLA
OEM and documentation control	5	Approved artwork, manuals and revision control
Commercial and logistics scope	5	Defined price boundary, Incoterm and delivery responsibility
Total	100	All mandatory gates must also pass

Suggested interpretation:

85–100: proceed to sample, audit or FAT if all mandatory gates pass
70–84: conditional approval with corrective actions
Below 70: do not shortlist without material new evidence

A high total score cannot compensate for a failed mandatory requirement. For example, an uncertified market variant should not be approved merely because the factory and price score well.

Hypothetical Supplier Comparison

The following scenario is hypothetical.

Supplier A provides:

A low price
Factory photographs
A general product catalogue
A certificate for a different model family
No serial-numbered test record
No fixed BOM
No spare-parts price list
An undefined “fast support” promise

Supplier B provides:

A higher price
Exact-model performance tables
A live factory audit
Calibration and test records
A controlled BOM
A destination-market document matrix
A milestone production schedule
A witnessed FAT
A model-specific spare-parts list
A negotiated support escalation process

Supplier A may still become acceptable after closing the evidence gaps. However, its initial quotation carries greater certification, production and service risk.

The comparison also shows why supplier evaluation should not be reduced to unit price or factory appearance.

When a Factory Audit Is Not Enough

A factory audit is useful, but it cannot prove every project requirement.

Additional work remains necessary when:

The offered model is outside the factory’s usual capacity range
A new refrigerant is proposed
The voltage or frequency differs from the existing product
The private-label design changes critical components
The product requires new destination-market certification
Several units must operate as a staged plant
The project uses unusual source temperatures or fluid
An open-loop source has difficult water chemistry
BMS integration is contract-critical
The buyer requires guaranteed seasonal performance

In these cases, require additional engineering review, sample testing, certification or a pilot project.

Supplier Warning Signs

Pause the approval process if:

The supplier will not identify the legal manufacturer.
The certificate holder does not match the supplier or explained manufacturing relationship.
The offered model is absent from the certificate scope.
Performance data omit entering-water temperatures or flow.
The supplier uses ISO 9001 as proof of product performance.
A factory operational test is presented as third-party certification.
The supplier cannot provide serial-number traceability.
Critical components can change without buyer approval.
MOQ changes after the technical configuration is agreed.
Lead time starts from an undefined event.
No spare-parts list is available.
The warranty excludes labour, freight and installation without stating so clearly.
After-sales support has no escalation contacts or response targets.
The supplier promises water-source operation without reviewing water quality.
Factory capacity is stated without considering test-station throughput.

Downloadable and Verifiable Resources

Use these primary resources during supplier evaluation:

The ISO, IEC and ASHRAE standards may require purchase. Exact CASSKY model datasheets, wiring diagrams, hydraulic drawings, current certificates, FAT formats, warranty terms, MOQ, lead time and spare-parts information should be described as request documents until supplied for the selected configuration.

Water Source Heat Pump Manufacturer FAQ

Does owning a factory prove that the supplier can deliver my project?

No. Factory ownership does not establish model fit, available capacity, test capability, compliance or schedule. Verify each area separately.

Is ISO 9001 a heat-pump product certificate?

No. ISO 9001 concerns the organisation’s quality management system. It does not certify a heat pump’s capacity, efficiency or safety.

Does an ISO 13256 test report prove market compliance?

Not by itself. It may provide performance evidence under stated conditions. Market compliance can also require safety, EMC, refrigerant, pressure, energy-labelling and local regulatory evidence.

Should every production unit receive a full performance test?

Not necessarily. A manufacturer may use type testing, production sampling and end-of-line functional tests. The buyer should approve the test plan, sampling rate and acceptance criteria.

How should MOQ be compared?

Compare MOQ for the same model, branding, voltage, controller, packaging and documentation scope. A standard product and a redesigned OEM configuration should not be expected to have the same MOQ.

What controls the lead time?

Lead time can depend on technical approval, long-lead components, private-label materials, certification, production slots, FAT and shipping. Define the start and end milestones contractually.

Which spare parts should a distributor stock?

Use the supplier’s model-specific recommendation and local service strategy. Prioritise low-cost parts that can stop operation, including sensors, boards, controls and selected hydraulic components.

Can remote support replace local service?

No. Remote support can assist diagnosis and settings. Refrigerant, electrical and hydraulic work still requires appropriately qualified local personnel.

Request a Manufacturer and Project Review

To evaluate CASSKY for a water or ground source heat-pump project, submit:

Destination country
Application and building type
Heating and cooling loads
Domestic hot-water demand
Source type
Minimum and maximum source temperatures
Available source flow
Water analysis or ground-loop design status
Required load-side temperatures
Power supply
Required quantity
Sample and annual forecast
Target delivery schedule
Required certification
OEM branding and document scope
FAT and inspection requirements
Spare-parts expectations
Proposed after-sales SLA
Installation and commissioning responsibilities

CASSKY can then review preliminary product fit, manufacturing scope, documentation availability and commercial requirements. MOQ, production lead time, exact-model certification, warranty, spare-parts commitments and service response should be confirmed in the resulting quotation or contract.