110
7 Transport and installation
7.1 Assembly
Caution
Risk of injury from incorrect handling. Transport
and assembly work to be carried out only by trained
specialists!
RoofVent
®
twin cool units are delivered in 3 sections (roof
unit, combi box, heating/cooling section with Air-Injector) on
a wooden pallet. Parts which belong together are labelled
with the same unit number.
Note
Depending on the optional components, the delivery
may consist of multiple parts (such as when a supply
air silencer is installed). In this case a forklift truck or
a crane is required for assembling the below-roof unit
on site.
The following guidelines are important when preparing for
assembly:
■
The units are assembled from roof level. A crane or heli-
copter is required.
■
For the transport of the unit to the roof 2 hoisting slings
are required (approx. length 6 m). If steel ropes or chains
are used, the unit corners must be properly protected.
■
Make sure that the roof frames correspond to the specifi-
cations in Section M 'Planning information'.
■
Define the desired orientation of the units.
■
The units are held in the roof frame by means of their own
weight. Silicon, PU foam or similar is required for sealing.
■
For units with exhaust air silencers, additional attachment
to the roof frame is required.
■
Follow the assembly instructions included.
Fig. E5: RoofVent
®
roof
units are installed from
roof level.
7.2 Hydraulic installation
Caution
Risk of injury from incorrect handling. Hydraulic instal-
lation must be carried out by trained specialists only !
The Hoval DigiNet control system is designed for a distributor
circuit with separate hydraulic connection of the units; i.e. a
mixing valve is installed in front of each unit. The diverting
system is used as standard.
Boiler system requirements
■
Adjust the hydraulic system to the control zone divisions.
■
Balance the pipework for the individual units within a
control zone to ensure even temperatures.
■
Starting at a fresh air temperature of 15 °C, the heating
medium (max. 120 °C) must be available at the mixing
valve without delay in the required amount and tempera-
ture.
■
Control of the flow temperature which is dependent on the
fresh air temperature is needed.
The Hoval DigiNet control system switches on the 'Enable
heating' for 1 minute once a week. This prevents the main
pump blocking after a prolonged shutdown.
RoofVent
®
unit pipework requirements
■
Use 3-way mixing valves with linear characteristics and
high quality.
■
The valve authority must be ≥ 0.5.
■
The valve actuator must have a short run time (5 s).
■
The valve actuator must be continuous, i.e. the stroke
changes in proportion to the control voltage (DC 0…10 V).
■
The valve actuator must be designed for emergency
operation with a separate manual control (AC 24 V).
■
Install the valve close to the unit (max. 2 m distance).
Caution
Risk of injury from falling parts. Do not apply any
loads to the coil, e.g. by means of the flow or return!
Note
Use the 'Hydraulic assembly' or 'Magnetic mixing
valve' options for quick and easy hydraulic installa-
tion.
Condensate drain
Dimension the slope and cross-section of the condensate
line so that no condensate backflow takes place.
RoofVent
®
twin cool
Transport and installation
Summary of Contents for RoofVent CON-9
Page 2: ......
Page 4: ...2...
Page 6: ...4...
Page 8: ...6...
Page 12: ...10 RoofVent LHW Use...
Page 40: ...38 RoofVent LKW Use...
Page 68: ...66 RoofVent twin heat Use...
Page 94: ...92 RoofVent twin cool Use...
Page 122: ...120 RoofVent twin pump Use...
Page 150: ...148...
Page 154: ...152 RoofVent condens Use...
Page 180: ...210 RoofVent LH Construction and operation...
Page 208: ...238 RoofVent LK Use...
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