Flexiheat BRAVA Operation instructions

HEATING AND COOLING UNITS
BRAVA
I. CONTACTS
II. ORIGINAL INSTRUCTION MANUAL
III. SAMPLE OF EC DECLARATION OF CONFORMITY
IV. WARRANTY TERMS AND CONDITIONS
V. UNIT STARTUP REPORT
VI. INSPECTION AND MAINTENANCE DOCUMENT
VII. SERVICE NOTIFICATION
VIII. LIST OF COMPONENTS INSTALLED IN THE DEVICE
Please read this instruction manual carefully before beginning any work.
RYKI 2017
ISSUE 1 EN

HEATING AND COOLING UNITS
BRAVA
II. ORIGINAL INSTRUCTION MANUAL

TABLE OF CONTENTS
1. INTENDED USE 5
2. DESIGNATIONS 5
3. DEVICE DESCRIPTION 5
4. TECHNICAL DATA 6
5. TRANSPORT 6
6. SAFETY RECOMMENDATIONS 7
7. INSTALLATION 8
8. WATER SYSTEM 9
9. WIRING SYSTEM 10
10. AUTOMATIC EQUIPMENT 12
11. AUTOMATIC EQUIPMENT COMPONENTS 12
12. DEVICE COMMISSIONING 14
13. REPAIR, MAINTENANCE AND WITHDRAWAL FROM USE 14
14. REMOVING MALFUNCTIONS 15
15. INFORMATIONS 15

1. INTENDED USE
BRAVA heating and cooling units are intended for use in compartments requiring application of
devices with an aesthetic and innovative appearance, such as:
»shopping centres,
»discos,
»showrooms,
»churches,
»sports and entertainment halls,
»car showrooms,
»as well as locations, where conventional heating units are used, i.e. in warehouses, production
premises, workshops, greenhouses, etc.
The units cannot be used in the compartments with humidity exceeding 90% and air
dustiness of more than 3 mg/m3.
The units are intended for use in compartments with the height not exceeding 5m.
The premises can be served by one unit or more.
2. DESIGNATIONS
HEATING AND COOLING UNIT BRAVA-II
Number of exchanger rows I; II
Optional automatic equipment set:
»1 unit: AB1-BRAVA
The unit, intended for heating function only, is delivered with I or II row heat exchanger. Optional
cooling function is available only with II row heat exchanger.
3. DEVICE DESCRIPTION
The unit comprises:
»highly-efcient axial fan (~ 700 rpm);
The units can have fans tted with electronically commutated motors.
»ring n single- or double-row heat exchanger.
Connections on units have female threads.
Fin heaters can be supplied with heating medium with the temperature of up to 150OC
and the pressure of up to 1.5MPa.
There is a risk of freezing the heating medium in the heater in rooms with temperature
below 0OC.
This risk can be reduced by using non-freezing heating or cooling media.
»housing made in high-quality plastic, with ve-way air diffuser. The diffuser design provides
protection against self-acting displacement of the blades.

4. TECHNICAL DATA
Weight ( I row heating coil) [ kg ] 32
Weight ( II row heating coil) [ kg ] 35,5
Fan specication
Voltage [V] 230
Motor power [kW] 0,12
Current [A] 0,5
Revolutions [rpm] 700
IP 44
Insulation class F
Working temperature [OC] do +70
Noise level [dB(A)] at the distance of 1m
III speed 47
II speed 39
I speed 34
Operational noise level – acoustic pressure level with taking into consideration directional coefcient
Q = 2 and compartment A = 100 m2 absorption ability at the distance of 1m.
5. TRANSPORT
BRAVA units are delivered completely covered in polyethylene lm to provide protection against
contamination and weather.
The unit is delivered with the Product Booklet (instruction manual).
The units should be transported on one level with spacers so as to prevent any
mechanical damages.

6. SAFETY RECOMMENDATIONS
The units have been designed and manufactured with application of solutions for
minimizing hazards to people and property. This does not eliminate all possible hazards,
though.
Therefore heating and cooling units should be used only in accordance with the
Instruction Manual
Commissioning, installation, connection, inspection and repair works on the units
should be performed by an authorised technician, and electrical works by a person
holding the required qualications.
All maintenance and repair works should be carried out with voltage off.
In the case of the unit failure immediately turn the motor electrical power supply off and
cut the heating medium supply off.
The unit can only work with properly operating electrical protection devices. It must be
uninterruptedly connected to the electrical installation tted with protection terminal
(earthing), residual-current device and service switch.
Use original spare parts only
Do not operate the unit, if the fan has no protective meshing on.
Important note!
Any installation or use of the heating and cooling unit not in accordance with the instruction
manual may cause the unit damage and voids the warranty.
Due to its design, the device does not emit any hazardous radiation.
Despite the fact that the device has been designed and manufactured in accordance with the
standards valid as for the moment of the manufacture start, likeliness of injury and damage to health
when using the device is unavoidable. This likeliness is related to frequency of using, cleaning and
repairing the device, presence of persons within the danger area, and not respecting the safety rules
as set out in the instruction.
Severity of the bodily injury and deterioration of health is dependent on numerous conditions which
can be foreseen partially only by considering them when designing the device and by providing
descriptions and warnings in the instruction manual.
Therefore residual risk is present if recommendations and instructions are not respected by the
operator.

7. INSTALLATION
Suspending the unit
The units are suspended on the ceiling using 4 rods with M8 thread. Spacing of fastening rods is
provided in the gure.
Rods should be screwed into rivet nuts of the unit for the depth of min 15 mm (rods can be
screwed for the max depth of ~25 mm).
When the unit needs to be suspended on a partition, e.g. of metal sheet, use stiffening
sections to avoid partition vibrations due to the unit operation, and prevent increase of
the noise in the compartment.
Minimum distance of the heating and cooling unit from the ceiling is 20 cm.

8. WATER SYSTEM
The units are expected to be supplied with a double-pipe system, e.g. cold water in the summer or
hot water in the heating season.
It recommended to use cut-off valves before and after the unit in order to enable its removal without
having to empty the supply system.
Electromagnetic valves can be connected on the heating medium supply.
Heat exchangers of the units are to be de-aerated centrally within the installation.
When operating the unit with use of the cooling function, in the lower part of the unit condensate
drips, and thus needs to be drained to the sewage by gravitation or using the condensate pump.
Therefore, use a connection in the housing, where hose for condensate drainage can be connected.
Improper venting of heating coil can result in failure to achieve the desired parameters
by the unit.
Avoid resting the installation ducts on the heating coil connections.
When connecting the heating coil to heat distribution network, protect the coil connections against
over-rotating as shown in the gure.
Damages to heating coil resulting from the above, are not covered by the warranty.

9. WIRING SYSTEM
Electrical installation and connection of the power supply to the unit must be carried out in
accordance with relevant construction standards and regulations.
Electrical connections to the unit can only be carried out by an authorized electrician
familiar with the instruction manual.
Before connecting make sure that the voltage and frequency rating of the power supply
and protection ratings are in accordance with the information given on the unit’s data
plate. Otherwise, do not connect the unit.
The unit’s user shall be responsible for electromagnetic compatibility of the whole
system to the applicable local regulations.
When operating on conductive elements or electrical wires, the operator always must be
accompanied by other person, who would cut the supply off in case of emergency.
Electrical equipment should be inspected on regular basis: x loosen connections,
replace damaged wires and cables immediately.
The units are tted with 1-phase fans (1~230V/50Hz) with internal thermal contacts Tk (lead out to
the box or permanently connected to the motor circuit). The electrical connection of the fan should
be carried out taking into account the service switch (WS), as well as the overload and short-circuit
protection inside the power supply/control box.
Failure to provide required motor protections and connect the Tk thermal contact within
the control circuit will render the warranty void.
Insert the power cord of the fan into the terminal box and x it on protective grate or supports of
the fan with cable ties. The fan thermal contact should be connected to the control circuit for the
fan supply.
Electrical connection of the motor must be in accordance with electrical diagrams provided in the
terminal box.
Example wiring and control diagrams for the units are given in gs. 1 to 3.
Fig. 1. Connection label for BRAVA unit motor

Example wiring diagrams for control circuits for BRAVA units
Fig. 2. Wiring diagrams without automatic equipment
Fig. 3. Wiring diagrams with automatic equipment

10. AUTOMATIC EQUIPMENT
CIRCULATED AIR SYSTEM (heating, cooling or ventilation), BRAVA units
DESCRIPTION:
»room temperature control with RAB3 controller;
»manual function selection: heating, cooling or ventilation;
»manual 3-step fan speed switch;
»MV+V20 actuator with valve;
»ZSB-1 power supply and control box.
11. AUTOMATIC EQUIPMENT COMPONENTS
The unit can be tted with the following:
- power supply and control box: ZSB-1 surface-mounted box, hermetically enclosed (equipped
with main switch, overcurrent switches, short-circuit switches, signal lamps) intended for operation
and control of the automatic equipment components.
The power supply (1~230V/50Hz) of the power supply/control box should be fed by the main
switchgear tted with main circuit-breaker and differential protection.
- RAB3 temperature controller
Supply voltage 250V AC / 50Hz
Measuring range 8...+30OC
Contact load 6(2)A
Protection level IP30

- V-110 Three-way valves: In the units, divide valves are widely used for adjusting the heating
medium ow through heating coils. Three-way divide valves with V20 female thread are used (on/
off). The valves should be installed on the supply, while the ow is allowed only in the direction as
indicated, i.e AB->A or AB->B.
Symbol DN kVS, m3/h t[oC] PN
V20 20 3,5 1...110 16
FITTINGS:
S: Supply
R: Return
H: Heat exchanger
Z: cut-off valve manually operated
P: circulation pump
MV: 3-way control valve operated by
valve actuator
- MV Valve actuators: for direct installation on the valves, an actuator is used, enabling the valve
“on-off” control.
Actuator type on/off Actuator [on-off] MV+V20
L-N N Supply voltage 230V AC
Supply voltage 230V AC
Close / open time 180 s
Protection level IP40
- WS Service switch: is intended to switch the fan motor off to carry out the servicing. Use of the
WS switch prevents an unexpected start of the motor, which could pose a danger when servicing.
Switch type WS-3
Poles 3-pole
Power circuit switch 3-phase
Rated continuous current 25A
Protection level IP 65

12. DEVICE COMMISSIONING
Before commissioning:
»check the unit for mounting;
»check water hose connections for tightness;
»check supply voltage in accordance with data plate;
»check additional protection of the unit fan and housing;
»check the electric motor for proper connection.
To turn the unit on:
»open the heating or cooling medium valves;
»turn the electric motor supply on;
»adjust direction and range of supply air ow using blades on the outlet grille.
To turn the unit off:
»reduce the heating or cooling medium ow to the unit exchanger;
»turn the fan electric motor supply off.
In the case of a long-lasting stoppage of the unit or in the case of a break in the heat
distribution network operation, drain the heating coil of water and if necessary, close
cut-off valves.
13. REPAIR, MAINTENANCE AND WITHDRAWAL FROM USE
Rolling bearings used in the fan require no regular lubrication. However, it is recommended to
perform a periodical inspection of the condition of motor bearings (fan rotor should rotate freely
without any excessive plays or knocks).
If the unit starts to work with excessive noise, check the fan and the whole unit for proper mounting.
The rotor blades should be cleaned with a damp cloth, after having removed the protective meshing,
so as not to allow the rotor to be improperly balanced.
Do not use high pressure washers for cleaning of the fan.
For any disturbances in the unit operation, please consult the technician or technical service.
All maintenance and repair works should be carried out with voltage off. Also protect
the unit from being accidentally turned on by other people.
Regularly check the level of dust accumulation on the heating coil. When dust accumulation is in
excess, use compressed air to blow it.
Excess accumulation of dust on the heating coil decreases the unit’s heating or cooling
capacity and reduces the air efciency.
Once the device is withdrawn from use, handle it to a proper waste treatment plant.

14. REMOVING MALFUNCTIONS
Trouble
description Possible trouble cause Troubleshooting
Leaking heat ex-
changer
mechanical damage of heat exchanger (it may easy
appear when the unit is connected to the installation
without taking care
use a locking spanner to mount with the installation de-
nitely
exceedance of admissible heating medium para-
meters
connect the unit with the heating installation protected
against the excessive pressure and temperature growth
heat exchanger freeze
use an antifreeze thermostat, antifreeze heating uids or
remove water from the unit within the period of standstill
and freeze risk
use of the unit in the aggressive environment
too load operation
of the unit
minimum distance from the wall or ceiling is not
maintained use distances recommended in the instruction manual
improper revolution direction execute a proper electric connection
improper parameters of the mains use the unit only when the parameters of the mains and
the unit are compliant
air outlet is blocked by outlet grid louvres avoid a signicant closing of outlet grid louvres at high
speed ratios
fan vibrations, the blades rub against xed elements check up the correctness of the fan and fastening reliabi-
lity of other elements of the unit
not centric fastening of the fan in its bearing plate
fan does not work
incorrect or unreliable electric connections check up or correct:
1) compliance of electric connections according to the
diagrams specied in the instruction manual
2) reliability of connections on electric terminals
3) parameters of the mains
improper parameters of the mains (lack of three
phases in three-phase motors)
fan motor is damaged
fan operation control elements are damaged
Revolution con-
troller
ARW does not
work
correctness of electric connections (whether the le-
ads are just clamped in the electric terminals)
check up or correct:
1) compliance of electric connections according to the
diagrams specied in the instruction manual
2) reliability of connections on electric terminals
3) parameters of the mains
only 1 controller can be connected to 1 unit
Actuator won’t
open the valve
correctness of thermostat operation (characteristic
“tick” when switching)
check up or correct:
1) compliance of electric connections according to the
diagrams specied in the instruction manual
2) reliability of connections on electric terminals
3) parameters of the mains
4) whether the servomotor reacts to an electric pulse. If
the servomotor damage is stated, the damaged element
should be claimed.
Room thermostat
transmits no signal
more than one unit is connected directly to the
thermostat (larger number means the thermostat
overload)
check up or correct:
1) compliance of electric connections according to the
diagrams specied in the instruction manual
2) reliability of connections on electric terminals
3) parameters of the mains
4) if there is no characteristic “tick”, the thermostat is me-
chanically damaged and should be claimed.
mounting place of the thermostat in the room
15. INFORMATIONS
In case of any inquiries or doubts regarding BRAVA heating and cooling units, please contact
Flexiheat UK Ltd on 01202 822221