i-SHWAK V4
Inverter air/water chillers and heat pumps with wall-mounted indoor unit and remote condensing outdoor unit
11
6.8
CONTROL SYSTEM
The i-SHWAK V4 units are all equipped with a microprocessor adopting an overheating control logic program through the
electronic thermostatic valve managed by the pressure transducers signals and temperature sensor. The microprocessor can
manage also the following functions:
water temperature regulation, antifreeze protection, compressor’s time setting, compressor
automatic starting sequence, alarm reset, alarm management and operating LED. The control system together with the INVERTER
technology and the on board sensors continuously monitor and adapt the performance of the inverter compressor, and of the fan
(2 fans as for the i-SHWAK V4 14, 14T, 16 and 16T models).
6.9
MONITORING AND PROTECTION DEVICES
All internal units are standard supplied with the following monitoring and protection devices: return water temperature sensor
installed at the return water pipe line from the plant, operating and antifreeze sensor installed at the outlet pipe of the water to
the plant and on water side a water flow switch is installed to protect the evaporator. All internal units are supplied with high
pressure transducer, low pressure transducer, com
pressor’s inlet and outlet temperature sensors, compressors thermal protection
device, fans thermal protection device, high pressure flow switch HP.
6.10
HYDRAULIC CIRCUIT
The i-SHWAK V4 outdoor units are supplied with an integrated hydraulic circuit including a high efficiency
(EEI≤0,23
for the sizes of
V4 14, 16, 10 and
12, EEI≤0,21
for V4 06, 08) modulating BRUSHLESS circulator, suitable also for chilled water utilization and is
directly managed by the controller on board the unit, Y filter with a mesh of 1000
μ
m, plate heat exchanger, flow switch for
protection, expansion vessel of 8 liters, relief valve (3 bar) to be connected to the collecting system the automatic air release
valve.
6.11
FAN SPEED CONTROLLER
This type of control is managed by the microprocessor and is necessary for optimizing the pressure of evaporation/condensation
during summer/winter operation in order to allow proper running of the unit.
