3
Subject to Technical Modifications of Combi 185 S/LS
Directions/
Safety Regulations
•
The construction of the unit is in accordance with all EU
regulations. (also see the CE certificate).
•
Before installation of the system, it is required that a tech-
nical expert ensures that safety measures are met with
regards to the parts which contain coolant, and that the
coolant is kept at a safe distance so that the work can be
carried out with no problems.
•
When maintenance work is conducted and where the coolant
circuits are opened, and especially when there is work involv-
ing fire (soldering, welding, etc.) it is required that measures
are taken against the danger of fire.
•
Before working on the unit, always remember to disconnect
all electrical hook-ups.
•
When hooking up the unit, all current laws and regulations
must be observed.
•
Water must be potable. A reduction valve must be installed
if the water pressure is increased.
•
All connections for potable water must be certified.
Work should only be performed by a
certified contractor.
Product Description
Use
The Combi 185 is a combined ventilation unit and service-water
heat-exchanger which can be used for: Heating hot service-
water. Ventilating the dwelling. Act as a supplement to heating
the dwelling with heated atmosphere which is injected when hot
service-water is not being produced by the heat exchanger.
Description
The Combi 185 is a unit which is ready to install, and where the
most important components are: cabinet, tank, components for
coolant, atmosphere and water circulation as well as a control,
regulating and monitoring unit. The unit can be connected to
an internal heat- exchanger with a surface of 0,8 m2, so that it
can be connected to an external boiler, a solar powered heating
installation, etc.
In the heat-exchanger, the Combi 185 utilizes the residual heat in
the exhausted atmosphere to either heat the atmosphere which
is injected or to produce hot service-water.
The Combi 185 Unit can heat service-water corresponding to the
annual hot water consumption of a family. The used and cooled
atmosphere is expelled outside via the relief duct. The tank has
a built-in immersion stem so that temperature regulation of the
tank is controlled by a sensor which is placed physically at the
centre of the tank.
The Combi 185 has an electric heating element installed in the
tank which acts as a backup.
Effect
In 24 hours, the Combi 185 can heat 380 litres of service-water
to a temperature of 55 °C. This may of course vary depending
on the temperature of the heat source, the cold water tempera-
ture as well as the drainage pattern. The integrated electric
power-cartridge which has an effect of 1 kW can be engaged at
peak loads. The Combi 185 uses only about 30% of the electric
energy which a directly heated tank would consume.
Coolant Circulation
Coolant circulation takes place within a self-contained circuit
where the HFCKW-free coolant R134a acts as energy carrier.
Heating Module
The heat in the atmosphere is removed by the condenser at low
evaporating temperatures and transferred to the coolant. The
coolant is drawn out as steam by a compressor and compressed
at a higher pressure/temperature level and then transported ei-
ther to the service-water heater of the condenser, or its induction
pipe. Here, the energy which the compressor has added to the
coolant and that part of the energy which comes from the con-
denser will be transferred to either the water or the atmosphere
which is being heated. In this way, the coolant will condensate
and revert to a fluid state. Subsequently, the high pressure in the
coolant will be put through an expansion valve where pressure is
reduced and the coolant is once again able to absorb heat from
the exhausted atmosphere via the evaporator.
Process
The control unit (Optima 311) will start up the compressor shortly
after hot water has been used and as soon as a temperature
drop has been sensed in the tank. The compressor will be
engaged until the entire tank has once again reached the set
temperature. The Combi 185 will normally be able to satisfy the
hot water needs of an entire family.
The power-cartridge in the tank can be activated manually via
the control unit, should a situation occur where the Combi 185
is unable to produce sufficient hot water. It will then be possible
to produce double the amount of hot water. The power-cartridge
can be set to the temperature which it is desired that the water
in the upper section of the tank be heated to. (Use the power-
cartridge only at peak loads as it consumes more energy than
the compressor).
Defrosting
When the temperature difference between the temperature prior
to the cooling surface and the temperature of the cooling surface
itself becomes too great, which will occur when ice has formed
on the cooling surface, then the unit will commence to defrost.
The Supply air ventilator and the electric heating surfaces will
disengage. The discharge ventilator will continue to run along
with the compressor which will send hot gas directly into the
evaporator until the ice has melted, and the cooling surface
has reached a temperature of around 10 °C, depending on the
temperature which has been set in section 50.The Supply air
ventilator and the electric heat surface will then re-engage.
Scope of Delivery
•
One combined ventilation unit and heat-exchanger for
service- water with a control unit.
•
Instructions for Installation and Instructions for Use.
Accessories
•
Exchange filters
•
Temperature sensor for solar cells, central furnace,
geothermal pipes
•
Electric pre-heating surface
•
Electric or Water-based post-heating surface
•
Anode
