Klimor EVO-S COMPACT, Operation And Maintenance Manual

Page: 55 / 88

53
9. DESIGN AND INSTALLATION RECOMMENDA-
TIONS
9.1 General recommendations
(a) in the case of a short distance between the equipment
and an intake or ductwork which creates the possibility of
spontaneous cold air flow into the equipment at standstill, It
is recommended to install on the inner wall of the air intake
an additional throttle which can be closed during standstill,
b) Drain and vent valves, thermometers and pressure gauges
should be installed near the water supply systems for the wa-
ter heat exchangers,
c) For heaters, it is recommended to use a Ø15 by-pass con-
trol valve with a manual control valve or adjustable orifice,
so that the residual flow of the heating medium through the
heater can be maintained during frosty periods.
d) When the unit is operating at temperatures lower than the
freezing point of the medium in the not working exchangers,
it should be emptied of the medium. After draining the water,
the exchanger should be blown with compressed air in order
to remove the remaining freezing substances.
9.2 Recommendations for water heaters
It is recommended to use heating water of so called low pa-
rameters 90/70ºC, in case of supplying the heaters with wa-
ter of high parameters it is necessary to use high-pressure
fittings (min. 1,6MPa) and work in counter-current.
9.3 Recommendations for the automation designer
Elaboration on typical automation systems can be found in
separate studies.
9.4 Protection of water heaters against freezing
It is recommended to use systems that protect water he-
aters from falling below the freezing temperature of the
medium.
9.5 Protection of electric heaters against overheating
It is recommended to use a system that controls the air flow
through the electric heater. It should be possible to switch off
the electric heater when the safety thermostat is activated and
when the air flow decreases.
Power supply of the heaters in the absence
of air flow may cause damage to the unit.
This applies especially to electric heaters.
9.6 Basic dependencies in operation of ventilation and air-con-
ditioning equipment
a) when mechanical intake and outlet ventilation is combi-
ned, the operation of the intake and outlet fans is coupled
b) start and stop time of the fans, set on the frequency co-
nverter, should be minimum 30s
c) in the event of loss of air flow through the devicethe he-
ating water supply should be cut off by the control valve on
the supply. Only the residual flow of the medium is allowed.
d) Operation of the humidifier and electric heater is only
allowed during air flow through the device,
e) Supply of the cooler with direct evaporation is only allo-
wed with air flow in the device.
Opening the supply of cooling medium to the
cooler in the absence of heat load can damage
the compressor.
f) In roof units, for external dampers, higher protection class
IP54 minimum must be used.
g) The unit’s automation system should enable the device
to be switched off in the event of the facility’s fire protection
system activation.
10. EXTERNAL VERSION OF THE KLIMOR EVO-S
COMPACT AIR HANDLING UNITS
KLIMOR EVO COMPACT units can be stubs leading to work
in outdoor conditions. The differences between the roof
version of the air handling units and the standard version
are specified below:
a) Housing
All gaps between the fixed panels of the cover type and the
aluminium frame are filled with sealing compound.
b) Air intake/outlet
The air intake/outlet is made as a ventilation fitting with ste-
ering wheels and a net. Its role is to cover the air inlet/outlet
from rain, wind and solids larger than 10×10mm. It’s scre-
wed to the damper or the air handling unit profile. Moun-
ting on the front wall or other (e.g. side) wall after equipping
the air handling unit with an empty section. It is possible to
mount additional elbows or corners.
c) Air dampers
The shut-off dampers are mounted outside the unit. Such
location is possible by hiding the blade drive in a double
aluminium profile. The damper actuators are covered, but
the actuators with a higher degree of protection min IP54
are used.