Hoval TopVent DGV Series Guide

Hoval Indoor Climate Systems
TopVent ®gas
Recirculation units and supply air units with e󰀩cient air distribution
for heating and cooling with gas-red heat exchanger
TopVent®DGV |NGV |GV |MG
Design handbook

A
B
C
D
E
F
G
H
I
Safety 3
TopVent®DGV
Gas-fired recirculation unit for heating high spaces
5
TopVent®NGV
Gas-red air recirculation unit for heating high spaces
with lower comfort requirements (e.g. high rack storage areas)
19
TopVent®GV
Gas-red air recirculation unit for heating low-ceiling spaces
33
TopVent®MG
Gas-red supply air handling unit for ventilating and heating high spaces
47
Options 61
Control system
TempTronic RC
67
System design 71
Operation 75
1
TopVent ®gas Content

2

Safety A
1 Symbols...............................................................................................4
2 Operational safety................................................................................4
3 Information for a user manual ..............................................................4
3
Safety Content

1 Symbols
Caution
This symbol warns against risk of injury. Please heed
all instructions designated by this symbol to prevent
injuries and/or death.
Attention
This symbol warns against property damage. Please
heed the respective instructions to prevent risk of
damage to the unit and its functions.
Notice
This symbol denotes information about the economic
use of the equipment or special tips.
2 Operational safety
TopVent® gas units are state-of-the-art and safe to operate.
Nevertheless, hazards may emanate from the units if they
are used incorrectly or not used as intended. Therefore:
■Please read the operating instructions before unpacking,
installing, commissioning and before maintaining the
equipment.
■Store the operating instructions so that they are easily
accessible.
■Observe any attached information and warning signs.
■Unauthorised reconguration or modication of the unit is
not permitted.
■Follow the local safety and accident prevention regula-
tions at all times.
■TopVent® gas units may only be installed, operated and
maintained by authorized, trained and instructed skilled
personnel. Specialists as dened by these operating
instructions are those persons who, based on their
training, knowledge and experience as well as their knowl-
edge of the relevant regulations and guidelines, can carry
out the work assigned to them and recognise potential
hazards.
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 prevent them. This can be done with
the help of the user manual.
In addition to national regulations for accident prevention and
environmental protection, a user manual should also include
the most important items of the operating instructions.
4
Safety Symbols

TopVent®DGV
Gas-fired recirculation unit for heating high spaces
B
1 Use ......................................................................................................6
2 Construction and operation..................................................................6
3 Technical data......................................................................................9
4 Dimensions and weights ....................................................................12
5 Design example .................................................................................13
6 Options ..............................................................................................14
7 Control system...................................................................................14
8 Transport and installation...................................................................14
9 Specication texts..............................................................................17
5
TopVent ®DGV Content

1 Use
1.1 Intended use
TopVent® DGV units are heaters intended for heating high
spaces operating with air recirculation.
Intended use also includes compliance with the operating
instructions. Any use beyond this is considered improper
use. The manufacturer can accept no liability for damage
resulting from improper use.
1.2 User group
The units are only allowed to be installed, operated and
maintained by authorised and instructed personnel who
are well acquainted with the units and are informed about
possible dangers.
The operating instructions are for operating engineers and
technicians as well as specialists in building, heating and
ventilation technology.
1.3 Hazards
TopVent® DGV units are state-of-the-art and safe to operate.
Despite every precaution being taken, potential and not
immediately obvious risks always remain, for example:
■Dangers when working with the electrical system
■Dangers when working with components of the gas circuit
■When working on the unit, objects (e.g. tools) could be
dropped.
■Malfunctions as a result of defective parts
■Danger caused by coming in contact with hot components
when carrying out work inside the unit or on the ue gas
system
2 Construction and operation
TopVent® DGV has been specially developed for use in high
spaces. It fulls the following functions:
■Heating (with gas-red heat exchanger)
■Recirculation operation
■Air distribution with Air-Injector
■Air ltration (optional)
The unit is mounted under the ceiling and draws in interior
air. The air is heated in a gas-red heat exchanger and
injected back into the room through the Air-Injector.
Thanks to its high performance and e󰀩cient air distribution
the TopVent® DGV covers a large area. Therefore, compared
to other systems, fewer units are needed to achieve the
required conditions.
2 di󰀨erent unit sizes and diverse output levels, as well as a
broad range of accessories make possible solutions tailored
to the requirements of each individual hall.
2.1 Unit construction
TopVent® DGV consists of the heater unit and the air injector.
Both components are bolted together, but can be dismantled
separately again.
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 ow rate, the
mounting height and the temperature di󰀨erence between
the supply air and room air. The air is therefore blown into
the room vertically downward, conically or horizontally. This
ensures that:
■with each unit a large area of the hall can be covered,
■the occupied area is draught-free,
■the temperature stratication in the room is reduced, thus
saving energy.
6
TopVent ®DGV Use

1
2
3
4
5
6
7
8
9
10
■
1
Flue gas connection
■
2
Combustion air connection
■
3
Gas connection
■
4
Terminal box with isolation switch
■
5
Fan
■
6
Casing
■
7
Gas control valve
■
8
Burner unit consisting of stainless steel
gas blower and premix burner
■
9
Heat exchanger of stainless steel
■
10
Air-Injector
Fig. B1: TopVent®DGV structure
■
1
Heating section
■
2
Air-Injector
Fig. B2: TopVent®DGV components
B
7
TopVent ®DGV Construction and operationUse

2.3 Operating modes
TopVent® DGV operates in the following modes:
■O󰀨
■Recirculation
■Recirculation night
■Recirculation speed 1
TempTronic regulates these modes of operation automatically.
Code Operating mode Description
OFF Off
The fan is switched off. Frost protection for the room remains active.
There is no room temperature control.
Fan ..............................off
Heating ........................off
REC Recirculation
On/off-operation: if heating is required, the unit draws in room air, heats it and
returns the warm air back into the room. The room temperature set value day
is active.
Fan ..............................speed 1 / 2 1)
Heater..........................60…100 %
1) Depending on heat demand
RECN Recirculation night
like REC, but with room temperature set value night
REC1 Recirculation speed 1
The same as REC, but the unit operates only at speed 1
(low air flow rate)
Fan ..............................speed 1 1)
Heater..........................60…100 %
1) Depending on heat demand
Table B1: TopVent®DGV operating modes
8
TopVent ®DGV Construction and operation