RoofVent Design Handbook
280Pages

Design Handbook Responsibility for energy and environment Supply and Extract Air Handling Units for Heating and Cooling High Spaces

Supply and extract air handling unit with energy recovery for heating high spaces Supply and extract air handling unit with energy recovery for heating and cooling high spaces RoofVent® twin heat Supply and extract air handling unit with high-capacity energy recovery for heating high spaces 63 RoofVent® twin cool Supply and extract air handling unit with high-capacity energy recovery for heating and cooling high spaces 89 RoofVent® twin pump Supply and extract air handling unit with reversible heat pump for heating and cooling high spaces 117 RoofVent® condens Supply and extract air...

1 Symbols _____________________________________ 5 2 Operational Safety ____________________________ 5 3 Information for a User Manual ___________________ 5

1 Symbols Caution This symbol warns against risks of injury. Please heed all instructions designated by this symbol to prevent injuries and/or death. Attention This symbol warns against risks of property damage. Please heed the respective instructions to prevent risk of damage to the unit and its functions. 3 Information for a User Manual According to the accident prevention regulations of some countries, the operator of equipment must meet certain requirements for the prevention of occupational accidents and instruct the operating personnel as to the hazards that may occur and how to...

RoofVent® LHW Supply and extract air handling unit with energy recovery for heating high spaces 1 Use ________________________________________ 8 2 Construction and operation______________________ 8 3 Technical data _______________________________ 15 4 Design example______________________________ 24 5 Options ____________________________________ 26 6 Control systems______________________________ 27 7 Transport and installation ______________________ 28 8 Specification texts ____________________________ 32

RoofVent® LHW units may only be installed, operated and serviced by authorised and trained specialist personnel who are familiar with the equipment and aware of the dangers involved. The operating manual is for English-speaking operating engineers and technicians as well as specialists in building, heating and ventilation technology. The RoofVent® LHW provides fresh air supply and extract air removal as well as heating for large spaces (production halls, shopping centres, sports halls, exhibition halls etc.). It fulfils the following functions: ■ Heating (with connection to central hot...

2.2 Air distribution with the Air-Injector The patented air distributor – called the Air-Injector – is the core element. The air discharge angle is set by means of the adjustable guide vanes. It depends on the air flow rate, the mounting height and the temperature difference between the supply air and room air. The air is therefore blown into the room vertically downward, conically or horizontally. This ensures that: ■ each RoofVent® LHW ventilates and heats a large floor area, ■ no draughts occur in the occupied area, ■ the temperature stratification in the room is reduced, thus saving...

Actuator Air-Injector: adjusts the supply air discharge direction continuously from vertical to horizontal Frost controller: prevents the coil freezing Extract air grille Extract air filter: bag filter with differential pressure switch for filter monitoring ER damper and bypass damper: opposed dampers for regulation of energy recovery, with actuator Access panel: access to extract air filter Weather louvre door: access to the fresh air filter and to the DigiUnit terminal box Fresh air filter: bag filter with differential pressure switch for filter monitoring Fresh air damper and...

D Fresh air inlet through weather louvre door ED Extract air inlet through extract air grille D Filter with differential pressure switch EH Extract air sensor D Fresh air damper with actuator EE] Filter with differential pressure switch D Plate heat exchanger ED Recirculation damper (opposed to the fresh air damper) B Supply air fan EE ER/bypass damper with actuator Q Silencer and diffuser ED Gravity damper □ LPHW heating coil ED Exhaust air fan □ Frost controller ED Silencer and diffuser D Supply air sensor ED Exhaust air outlet through exhaust air grille ED Air-Injector with actuator Fig....

2.3 Operating modes The RoofVent® LHW has the following operating modes: ■ Off ■ Exhaust air ■ Ventilation ■ Supply air ■ Ventilation (reduced) ■ Night cooling summer ■ Recirculation ■ Emergency operation ■ Recirculation night The DigiNet control system controls these operating modes automatically per control zone, in accordance with the scheduler (exception: emergency operation). In addition, you can: ■ manually switch the operating mode of a control zone, ■ switch each individual RoofVent® unit to the following operating modes: Off, Recirculation, Exhaust air, Supply air and Emergency...

Code 1) Operating mode Exhaust air The RoofVent® unit extracts spent room air. There is no room temperature control. Supply air The RoofVent® unit blows fresh air into the room. Heating is controlled depending on the heat demand and temperature conditions. Spent room air passes through open windows and doors or another system provides extraction. The room temperature set value day is active. Night cooling summer On/Off operation: If current temperatures allow, the RoofVent® unit blows cool fresh air into the room and extracts warmer room air. The room temperature set value night is active....

Technical data 3.1 Unit type reference Unit type_ Unit size_ KK Design for non-Hoval control Roof unit_ Roof unit with energy recovery Heating section and coil type_ H.A Heating section with coil type A H.B Heating section with coil type B H.C Heating section with coil type C Table B2: Unit type reference Extract air relative humidity max. 60 % Moisture content of extract air max. 12.5 g/kg Heating medium temperature max. 120 °C Minimum operating time VE2 min. 30 min Table B3: Application limits of the RoofVent8 LHW