Chilled-water side
Provide required cooling duty and entering/leaving temperatures, design flow, fluid composition and permissible pressure drop. Obtain the selected evaporator’s limits, connections and fouling basis.
EQUIPMENT / EQUIPMENT FAMILY
Zhongda water-cooled screw chiller family
A catalogue lead without a model schedule: obtain duty, water-side, part-load and controls data before sizing the cooling plant.
From Zhongda Air Conditioning Group Co., Ltd.
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Turn the short catalogue description into a model-specific plant selection
Zhongda’s original detail identifies a water-cooled screw chiller family and describes asymmetric five-to-six screw rotors, capacity adjustment, microcomputer control, remote control and ten self-protection functions. Those are manufacturer descriptions, not an independently tested efficiency or reliability result.
The product-model field is unfilled. Clicking the parameter tab does not reveal a numerical table, and the reviewed download-centre link returns to its reference-only listing. No rated capacity, input power, water temperatures/flows, refrigerant, dimensions or operating envelope can be established from these pages.
The original product image shows horizontal vessels, large water connections and several electrical/control cabinets. It illustrates the manufacturer’s equipment concept without providing a legible model plate or proving the delivered configuration. A purchase should start with a selected-model offer at the project’s chilled-water and condenser-water conditions.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- Water-cooled screw catalogue
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| Parameter | Published value | Conditions and evidence |
|---|---|---|
| Published equipment type | Water-cooled screw chiller family | A catalogue category, not a resolved individual model. Source |
| Compressor description | Five-to-six asymmetric screw-rotor design | Manufacturer wording; compressor make, model, refrigerant and circuit count not stated. Source |
| Capacity and controls wording | Capacity adjustment; microcomputer and remote control | Minimum load, adjustment method, controller and communication protocol remain unspecified. Source |
| Numerical performance schedule | Not established from the reviewed source | Unfilled model field and empty readable parameter section; no usable download schedule obtained. Source |
Selection and application review
Selection depends on both water circuits
A nominal cooling-duty request alone cannot settle this family’s selection. Ask Zhongda for a specific model and matched chilled-water and condenser-water schedule, with the design conditions printed on the offer. The original catalogue provides no values to substitute for these inputs.
Condenser-water side
Define entering/leaving temperatures and available flow with the tower/heat-rejection design. Obtain condenser pressure drop, connection and water-quality requirements.
Site and electrical side
State available power and installation/service access. Request dimensions, shipping/operating weights, lifting requirements, clearances and electrical starting/operating data.
Capacity adjustment is not a part-load performance curve
The source’s variable-capacity wording does not identify whether the selected configuration uses slide-valve unloading, speed control or another arrangement. It gives no minimum stable load, stage/circuit sequence or performance curve. Do not infer inverter operation from the phrase alone.
Request the supplier’s load-control description and capacity/input data at the project’s relevant load and water-temperature conditions. For a multi-unit plant, agree lead/lag, staging and water-flow behaviour with the controls designer. The five-to-six rotor description likewise does not prove a measured COP or superiority over a competing offer.
Ten protections must become a named control schedule
The page names ten self-protection functions but does not list them or show their thresholds. Remote control is advertised without a protocol or points list. A buyer needs these details to integrate and safely commission a real plant.
Protection and interlocks
Obtain the exact protection/alarm list, thresholds, reset requirements and required water-flow/pump interlocks for the selected model.
Read the sourceBMS and plant sequencing
Ask for controller identity, protocol, interface hardware, writable/read-only points and the division of responsibility between chiller and plant controller.
Commissioning evidence
Require the current wiring/control documents and supplier commissioning procedure; record verified interlocks and settings during acceptance.
Define tower, pumps and accessories in the offer
Zhongda separately markets cooling towers and other HVAC equipment. Their presence elsewhere in its catalogue does not establish that this chiller price includes them. The illustrated water connections and cabinets are not an itemised bill of materials.
Agree responsibility for heat rejection, pumps, strainers, water treatment, valves, instrumentation, insulation, power and controls work. Confirm the actual chiller’s included accessories and required site provisions. Compare a complete agreed scope rather than treating a machine-only offer as an installed plant.
Accept performance against the selected model and agreed conditions
There is no numerical rating or independent model test in the reviewed public pages. Request the applicable performance report or witnessed factory-test proposal and match model, refrigerant, electrical supply, water conditions and measurement scope. A corporate engineering qualification or procurement candidacy does not replace that evidence.
At site, agree who establishes stable operating conditions, supplies the instruments and signs the trial-acceptance record. The published warranty begins from successful equipment trial acceptance, so the acceptance event should be defined before delivery. Do not promise a cooling duty, energy saving or noise level that the selected offer has not established.
Handover needs a service boundary as well as a working machine
The official corporate service page states a 12-month warranty from successful trial acceptance. It distinguishes urban two-hour response, eight-hour arrival and repair timing dependent on whether parts need replacement. Those are attributed terms whose geographic and contractual application still needs confirmation for this installation.
Before order approval
Resolve model selection, duty/inputs, water-side and electrical schedules, included scope, documents and acceptance method.
Before start-up
Confirm supplier/site responsibilities, approved water and electrical conditions, interlocks, access and operator training.
At handover
Keep model/serial identification, approved schedules, test and trial-acceptance records, training documents and the agreed warranty/support contact.
Read the source
Sources and review scope
Compiled by HVACDeck Editorial. Source review identifies what the publication states; it is not an independent performance test or certification.
- Zhongda original water-cooled screw detailChecked 2026-10-11 · Full wording, original product image and clicked parameter tab inspected; no numerical model schedule.
- Official after-sales pageChecked 2026-10-11 · Trial-acceptance warranty and geographically/parts-conditioned service stages; not global unconditional repair terms.
- Official catalogue download listingChecked 2026-10-11 · 2022 reference-only test entry opens same listing; usable technical selection file not obtained.
- Official company and product-scope overviewChecked 2026-10-11 · Broad HVAC/engineering offering; other catalogue equipment not automatically included in this chiller order.
Editorial method and corrections · Report a detail with this page URL
Turn the evidence into an enquiry
Send the manufacturer your required duty, installation conditions and the unresolved items identified in this brief.