CyberOne EC DX IOM Manual
1.4.2
Circuit Breakers/Motor Start Protectors
CyberOne EC systems incorporate state of the art
component protection with the use of motor start protectors
and circuit breakers. If an overload occurs the switches must
be manually re-set after the overload condition is cleared.
1.4.3
Heaters (Optional)
Optional heaters may be furnished for re-heating the supply air
as required to offset the sensible cooling of the system during
the dehumidification cycle and for the automatic heating
mode. As a standard, electric resistance heating elements are
factory installed in the supply airstream to heat the supply air.
1.4.3.1
Hot Gas Re-heat
As an option, hot gas re-heating may be provided for re-
heating the supply air as required to offset the sensible
cooling of the system during the dehumidification cycle.
1.4.3.2
Hot Water Re-heat
For this option, hot water heating coil(s) are factory installed
in the supply air stream after the cooling coils to heat the
supply air. A 2-way on/off valve is provided to control the
flow of hot water through the coils to maintain the correct
re-heat temperature.
1.4.4
Coil(s)
Cooling and optional hot water and hot gas reheat coils are
aluminum finned/copper tube construction. The coils are
leak tested and cleaned before installation by the factory.
1.4.5
EC Fan
The unit is equipped with a high efficiency, Electronically
Commutated (EC) fan. EC fans utilize a brushless motor
equipped with permanent magnets and permanently
lubricated ball bearings. The fan impellers are backward
curved and attached to the rotor casing. The fan is balanced
and aerodynamically optimized to minimize vibration.
The fan does not utilize drive belts. Fan speed is variable via a
0 to 10 VDC signal from the system controller. The fan motor
is equipped with integral electronics and does not require the
addition of secondary electronics such as thermal protection,
inverters or filters. The fan will not produce AC inverter whine.
EC fans feature an integrated monitoring function to protect
the motor and electronics against damage from jamming,
phase loss or overheating. If any of the following failure
conditions occur, the motor automatically stops and an alarm
is signaled:
a.
Locked rotor
1
b.
Loss of a phase
1
c.
Low main supply voltage
2
d.
Over-heating of electronics
2
e.
Over-heating of motor
2
1
Upon correction of these failure conditions, the motor
will automatically reset.
2
Upon correction of these failure conditions, the motor
must be manually reset by turning off power for 20
seconds.
1.4.6
Temperature/Humidity Sensor
As a standard for room air control, a temperature/humidity
(T/H) sensor is factory mounted in the return air stream.
The (T/H) sensor monitors the return air conditions and
provides input signal(s) to the system controller to manage
the operation of the A/C unit consistent with the set points
entered in the system controller. As an option, sensor(s) may
be shipped loose for field installation. Refer to the electrical
drawing supplied with your unit for details specific to your
system.
1.5
Optional Equipment
1.5.1
Humidifier
CyberOne EC systems are offered with an optional
electrode steam humidifier. The humidifier is factory installed
inside the air conditioner and includes fill and drain valves and
associated piping. Operation of the humidifier’s fill and drain
cycles is based on water conductivity and is maintained by the
humidifier controller. An operating manual for the humidifier
is provided under separate cover. Refer to that manual for
detailed information on operation of the humidifier.
1.5.2
Condensate Pump
An optional factory installed condensate pump may be
provided. The pump automatically eliminates condensate
and humidifier flush water (if applicable) from the drain pan.
Should an overflow occur, an internal overflow safety switch
will signal the E²
system controller of the alarm condition.
1.5.3
Water Detector
As an option, STULZ offers spot type or strip/cable type water
detectors. Upon sensing a water leak, the water detector
control circuit will signal the A/C system controller of the
alarm condition.
1.5.4
Smoke Detector
Optionally mounted in the return air stream, a photo-electric
smoke detector is used to sense the presence of smoke and
signal the controller when a smoke alarm condition exists and
shuts down the air conditioner.
1.5.5
Firestat
Optionally mounted in the return air stream, a fire detector
senses high return air temperature and signals the controller
when a fire alarm condition exists and shuts down the air
conditioner.
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