opusdc product specification

Operation
The extract fans shall be as indicated on the drawings and shall be in accordance with the fan schedule in the specification. The vitiated air shall be extracted from each area via ductwork as shown. All necessary ductwork fittings and ancillaries shall be allowed for by the mechanical sub contractor. The extract fan shall automatically vary its speed as it receives signals from one of the interconnected sensors sited in the rooms being ventilated. When the signal is received the fan shall have the ability to increase speed gradually until the required level is achieved or it will work on a trickle and boost principle i.e. increase ventilation rate from the continuous background rate to the design maximum in one step.

Fan specification
The fans shall have low energy, high efficiency DC fan/motor assembly with sealed for life bearings, mounted within an acoustically lined, 100% recyclable plastic case, ensuring a very efficient quiet solution. It shall have noise levels and power requirements as detailed in the specification and in accordance with the manufacturers details.

The unit shall incorporate a quick release mounting bracket. The bracket shall enable the unit to be mounted horizontally or vertically, enabling the unit to be removed without the aid of specialist tools. The depth of the unit shall not be greater than 190mm (including mounting bracket). The unit shall be constructed with one removable panel allowing quick and easy access to the electrical connections.

For commissioning purposes the unit shall have a miniature control panel mounted in its facia facilitating high and low speed adjustment (trickle and boost) together with run on timer (1- 60minutes) and shall be accessible without the need of removing any access panels or the unit itself. Any adjustments shall be quickly and easily achieved with a standard screwdriver. The control panel shall also have status indication lamps on the underside of the unit.

Run and standby versions shall have autochangeover and duty share as standard, the fan shall changeover every twelve hours of run time to maximise the units effective life span. Units supplied complete with backdraft shutters except sizes 75 and 110.

Three number 100 diameter circular spigots on the system side of the unit are available to allow the ventilation of a number of rooms or points from a single unit. Two of the spigots have blanks fitted which are easily removed to facilitate the interconnection of ductwork.

Control Specification
The fan unit shall have the following functions integrally mounted within the fan unit on a purpose made PCB, all such components pre-wired and factory fitted by the manufacturer: -

Standard OPUSDC

Integrated Infinitely variable speed control

Integral background ventilation commissioning facility

Integral boost ventilation commissioning facility

Autochangeover and duty share (twin fan unit only)

Integral adjustable run on timer

Integral S/L terminal for boost trigger from remote switch, e.g. lightswitch

Remote failure indication connections. (For OPUS-RFI only)

Facia mounted fan failure indication

3 years parts and labour warranty*

Fan shall be the OPUSDC type unit as manufactured by Nuaire

Ecosmart – ES-OPUSDC

Integrated Infinitely variable speed control

Integral background ventilation commissioning facility

Integral boost ventilation commissioning facility

Autochangeover and duty share (twin fan unit only)

Integral adjustable run on timer

Integral S/L terminal for boost trigger from remote switch, e.g. lightswitch

Integral low voltage terminal for boost trigger from remote low voltage switch

4 no. IDC sockets for interconnection of Ecosmart fans or low voltage sensors using pre-plugged 4-core low voltage cable. Multiple fans can be interconnected and run from one or more sensor or controller

Remote volt free run and fail status indication

Facia mounted fan failure, system status indication as follows

Fan 1 status

Fan 2 status

Power to fan

System standby

4 years parts and labour warranty*

Fan shall be the ES-OPUSDC type unit as manufactured by Nuaire.

The user control and low voltage sensors are supplied complete with a 10m length of low voltage, pre-plugged cable to facilitate their interconnection (other length of cables available).

*First year of warranty includes parts and labour the remainder is parts only. Warranty is increased by one year for the Ecosmart version due the component life enhancements of utilising this control method. Parts only aspect of warranty is increased.

The manufacturer’s recommendations should be observed at all times.