DX mechanical cooling
Variable-speed compressor and outdoor condenser; select sensible/total duty at the actual return and ambient.
EQUIPMENT / EQUIPMENT FAMILY
AIRSYS OPTIMA2 modular precision cooling
Variable-speed DX room cooling with optional direct-air or refrigerant-pump economisers: approve the exact module, condenser and operating modes on one rating basis.
From AIRSYS precision and process cooling
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Compare OPTIMA2's DX, direct-air and refrigerant-pump duty correctly
OPTIMA2 is a modular precision air-conditioning family for data centres and telecom rooms. The official page describes variable-speed scroll compressors, EC fans, upflow/downflow arrangements and optional direct free cooling or refrigerant-pump cooling. Those options have different room-air and outdoor interfaces; a single claimed compressor COP cannot represent the complete unit or all operating modes.
The inspected E2009V01.1 catalogue supplies a 40X0 DXA schedule at 460 V/3Ph/60 Hz. Its variable-speed table separates total and sensible capacity and uses return dry-bulb/dew-point conditions. The web page's wider 20–200 kW modular span and the brochure's illustrated module combinations are not silently reconciled into a current selected rating. This brief brings the configuration, energy boundary and approval questions together.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- OPTIMA2
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| Parameter | Published value | Conditions and evidence |
|---|---|---|
| 40X0 DXA schedule | R410A; O/U supply; 11,170 m³/h; 460 V / 3Ph / 60 Hz | Catalogue page 11. This electrical/model schedule must not be transferred to a 50 Hz offer. Source |
| Variable-speed example | 40.8 kW total / 40.0 kW sensible at return 29.4 °C DB / 11.1 °C DP, outdoor 35 °C | Page 12 first row; another row at the same stated temperatures gives 32.7 / 32.1 kW without naming the speed. No speed assumed. Source |
| Outdoor condenser | VME60 standard; VME80 high-efficiency option | 40X0 schedule; ordered matching and pipework need approval. Source |
| Economiser options | DFC-X0 direct-air arrangement or RPU12 refrigerant pump | Both optional. RPU12 table lists 0.5 kW and 0.6 m³/h; not the power or air volume of the full cooling system. Source |
| Electrical maximum | 26.3 kW maximum operating power; 36.5 A maximum operating current | 40X0 schedule. These are maximum entries, not the rated compressor input or a supplied site protection design. Source |
Selection and application review
Approve the actual module and sensible-load condition
The 40X0 nominal code is not one fixed 40 kW duty. The catalogue's primary schedule shows a 43–20 kW span at return 29.4 °C/45% RH and 35 °C outdoor; its variable-speed performance table uses a dry-bulb/dew-point basis instead. Obtain the current selected total/sensible output, airflow, speed/load point and full input power at the project's return and ambient conditions.
Use the selected sensible output for the IT heat duty and include any humidity/reheat requirements. The two rows at identical listed return conditions lack speed labels, so no fabricated minimum/maximum speed is assigned. Approve the actual number of modules and remaining duty during maintenance or failure; modular expansion alone does not establish redundancy.
Choose the economiser by its air and refrigeration interfaces
Direct free cooling admits outdoor air and needs intake, discharge, filtration and humidity/contamination limits. Its 40X0 table lists 23, 30, 38 and 45 kW at indoor/outdoor differences of 6, 8, 10 and 12 °C, with return 29.4 °C DB/11.1 °C DP. These are temperature-dependent ventilation duties, not an unconditional addition to DX capacity.
The RPU option instead uses a refrigerant-pump circuit without bringing outside air into the room or using evaporative water, according to the catalogue. Obtain its operating envelope and transitions between pump, hybrid and compressor modes. Specify which option is actually delivered and how it interfaces with the outdoor condenser and indoor unit.
DFC option
Direct outside-air path; close filters, humidity eligibility, penetrations, exhaust and mode transitions.
RPU option
Pumped-refrigerant economiser; close refrigerant piping, pump/control dependencies and temperature envelope.
Keep compressor COP separate from full-unit and annual efficiency
The webpage claims compressor COP above 14 at rated operation and as high as 19 at part load. It does not provide the complete unit energy boundary for those figures. The catalogue labels its unit EER column with an unusual BTU/h/kW notation; this brief does not reinterpret it into a COP or silently correct its unit. Request an unambiguous current performance schedule and test basis.
The brochure's New York/Beijing annual comparisons assume a constant 40 kW heat load and 24 °C return temperature. Those assumptions are not this project's weather or load. Include compressors, indoor/outdoor fans, pump/control power and economiser hours in a site calculation. An annual saving or PUE outcome needs its own evidence.
Coordinate condenser space, water options and service access
Select the actual VME condenser, permitted refrigerant run/lift and pipe sizes using current installation instructions. The V-shaped upward discharge description does not establish allowable spacing beside another condenser or against a wall. Obtain approved unit/option drawings and the access needed to remove modules and maintain the separated technical compartment.
The schedule lists an optional 6 kW electric heater and 5 kg/h electrode humidifier with 3.8 kW input. If included, close water quality, supply, drains and their impact on electrical and cooling loads. If excluded, do not describe humidity control as a delivered feature merely because the family is marketed for precise environments.
Set controller behaviour and acceptance against one agreed specification
The source discusses temperature control as close as ±0.5 °C in its compressor comparison, but another feature section states ±1 °C temperature and ±5% RH. Require the agreed sensor locations, control basis and tested acceptance values for the ordered configuration. Neither passage proves an achieved IT inlet condition at this site.
For NetOne/group controls, obtain the controller/software, point list, licence, network dependencies and loss-of-communications response. Specify mode transitions, alarms, restart and remaining duty tests for the delivered DX/DFC/RPU arrangement. Obtain a dated quotation and current conformity documents for the selected supply market. The platform has not tested OPTIMA2, verified inventory/delivery or measured an installed efficiency result.
Sources and review scope
Compiled by HVACDeck Editorial. Source review identifies what the publication states; it is not an independent performance test or certification.
- Official OPTIMA2 product pageChecked 2026-10-11 · Complete live page read; modular range and compressor claims kept in their source scope.
- OPTIMA2 E2009V01.1 original catalogueChecked 2026-10-11 · Descriptive and performance pages 1–12 and contact page 17 read. Drawing pages 13–16 contain graphical dimensions not adopted here. Model/supply, table conditions and differing control/efficiency claims retained.
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.
Continue the selection
Other equipment from this manufacturer
AIRSYS MOBILECOOL-OUTDOOR wall-mounted telecom cooling
AIRSYS DATACOOL-PACKAGE integrated room cooling
AIRSYS CYBERCOOL-MOD CW chilled-water room terminals
AIRSYS CYBERCOOL-MOD DXA air-cooled room cooling