Overview of product
6
1.3
Nameplate
You can get the unit information and simple
performance parameters from the nameplate.
1.4
Characteristics of Fan Coil Unit
Special hyperbolic design fins enhance heat
transfer efficiency Fins spacing is optimized to
promote heat exchange efficiency and minimize
air pressure drop.
All fans are statically and dynamically balanced,
forwardly curved, DWDI centrifugal type. The
EC fan motor assembly is designed for
low-noise operation, while having compact
dimensions and permitting easy installation and
replacement.
High efficiency electronically commutated (EC) motors is fitted as standard on all units. Motor can be
regulated by 0-10VDC signal
supplied by a BMS, thermostat or DDC controller. The motor is resiliently
mounted, self aligning and oiled for life.
YECFC fan coil units have a variable speed driven permanent magnet motor and as such have an extremely
wide operating envelope. When fan air supply quantities and external static resistances are extremely low,
noise generated by air movement is significantly decreased. Under such circumstances, when air movement
noise is extremely low, motor noise may become audible in the form of a very low level background hum.
This condition is normal with this model of EBM motor when operating at a control voltage of below 4V.
When units are installed into a ceiling concealed non-ducted application with minimal external static
resistance, it may be desirable to limit the minimum control voltage to 4 volts if low levels of motor noise is
of concern.
The installing contractor is responsible to commission fan coil units with minimum and maximum control
voltage settings commensurate with the units design operating range.
The fan and motor performance classes exceed the new ErP15 (European Energy- related Products Directive)
Directive.
Water supply and return header is made of a single forged threaded brass connector. The header provides
water distribution through the water circuits for high heat exchange efficiency and reduced water pressure
drop.
Coils are designed for a wide Delta T with chilled water application typically 7-10 degrees C and hot water
typically 15-20 degrees C.
The coil maximum working pressure is 1.6Mpa. Each coil is leak tested by a 2.8Mpa nitrogen overpressure
test.
Optimal design of condensate drain pan can effectively drain condensate water and reduces the growth of
bacteria and microbial growth. The drain tray is stainless steel to avoid corrosion and is extended 100mm
beyond the casing to capture any condensate from the chilled water control valve.
The external casing is made of galvanized steel. Insulation is pressed and adhered on inner wall of the panel,
which avoids cold bridge. The underside of the drain pan is insulated with
primary hot-press molded insulation.
All factory wiring is provided to terminals located in a metallic box for customer connection.
1.5
Working operating range of fan coil Unit
It is recommended the temperature of chilled water should not be lower than 5
℃
.
It is recommended the temperature of hot water temperature should not be higher than 80
℃
.
Conditioned and treated water quality is required.
For maximum operating life the running temperature≤40
℃
and relative humidity≤95%.
