Carrier Aquazone 50WD handleiding
Handleiding
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59
OPERATION
Power Up Mode
The unit will not operate until all the inputs, terminals and safety
controls are checked for normal operation.
NOTE: The compressor will have a 5-minute anti-short cycle
upon power up.
Unit Protection Module (UPM)
All Carrier WSHP units feature an advanced UPM which imple-
ments all the critical equipment safeties and allows for continuous
safe and reliable operation. Figure 45 shows the UPM sequence of
operations for units safeties. Refer to Step 9 — “Configure Unit
Control Components” on page 24 for detailed information about
Safeties and Alarms.
Constant CFM Dehumidification
Units with a Constant Airflow ECM, please see Fig. 46 for the de-
humidification sequence of operation.
Option Card
An optional expansion card is provided on units that are intended
to be controlled by a thermostat. The card supplements the prima-
ry thermostat control by controlling auxiliary devices that a ther-
mostat is not typically capable of controlling. Refer to Step 9 —
“Configure Unit Control Components” on page 24 for
information.
Sequence of Operation of Units Without DDC
Controller
STANDBY
Y and W terminals are not active in Standby mode; however, the
O and G terminals may be active, depending on the application.
The compressor will be off.
COOLING
Y and O terminals are active in Cooling mode. After power up, the
first call to the compressor will initiate a 270 to 300 second random
start delay and a 5-minute anti-short cycle protection time delay.
After both delays are complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start delay
is omitted.
HEATING STAGE 1
Terminal Y is active in heating stage 1. After power up, the first
call to the compressor will initiate a 270 to 300 second random
start delay and a 5-minute anti-short cycle protection time delay.
After both delays are complete, the compressor is energized.
NOTE: On all subsequent compressor calls the random start delay
is omitted.
HOT GAS REHEAT WITH OPTION CARD (OPTIONAL)
Terminal H is active in dehumidification mode with hot gas
reheat. After a call for H, the reversing valve (O), compressor (Y),
and fan (G) are also enabled.
NOTE: Any call for cooling (Y), heating (Y or W), or reversing
valve (O) will override dehumidification mode (H).
WATERSIDE ECONOMIZER WITH OPTION CARD
(OPTIONAL)
Y and O terminals are active in Cooling mode. When the entering
water temperature drops below the configured entering water tem-
perature set point specified on the Option Card, the compressor
and reversing valve are disabled and the waterside economizer is
enabled. The waterside economizer three way control valve will
divert water to the economizer coil for free cooling. If a cooling
call remains for a period of > 10 min the compressor will be en-
abled to assist the WSE in meeting the cooling demand. When the
entering water temperature rises above the configured on the
Option card board set point, the waterside economizer is dis-
abled and the compressor and reversing valve are enabled.
AUXILIARY ELECTRIC HEAT (OPTIONAL)
The output provided on the controller shall be able to control
single stage of electric heat. The sequence of operation of the
electrical heat is an alternative/emergency heat. When the ter-
minal W is energized, it will enable Electric heater and disable
compressor (Y).
TWO-POSITION MOTORIZED ISOLATION VALVE
(2-WAY SOLENOID VALVE) (OPTIONAL)
The two way water flow control valve is enabled anytime there is
a call for cooling (Y), heating (Y), or dehumidification (H) and
allows water to flow through the unit. When there is no call for
cooling, heating, or dehumidification, the water flow control valve
is disabled, stopping flow through the unit.
BOILERLESS HEAT WITH OPTION CARD (OPTIONAL)
When the entering water temperature is below the configured set
point on the Option Card (refer to Step 9 — “Configure Unit Con-
trol Components” on page 24) and there is a call for heating (Y),
the compressor is disabled and the auxiliary heat output is enabled
(W). When the entering water temperature is above the configured
EWT set point, the auxiliary heat out-put is disabled and the com-
pressor is enabled.
DIFFERENTIAL PRESSURE SWITCH / FLOW SWITCH
(OPTIONAL)
The flow switch monitors the pressure difference between two
points on the waterside. The unit will be shut down if flow is not
met.
REFRIGERANT LEAK DETECTION SYSTEM
(OPTIONAL)
The A2L sensor continually samples the air and if the concentra-
tion of refrigerant detected is higher than the preset threshold
(15% LFL), it sends a signal to the UPM which then switches off
the compressor and turns on the blower. The compressor will re-
main off until saturation level is within acceptable range (12%
LFL). The A2L sensor is connected to the UPM, it must always
remain connected. If communication is lost, the UPM will enter
refrigerant leak hard lockout fault and energize the alarm contact.
To test that the communication between the sensor and board is
active, the sensor can be disconnected from the UPM, which
should simulate a fault. The A2L sensor for the refrigerant leak
detection system shall only be replaced with the part specified on
the spare parts list.
COMPRESSOR RELAY (OPTIONAL)
Optional relay providing compressor status via a normally open
set of dry contacts.
PUMP/VALVE RELAY (OPTIONAL)
The pump/valve relay is enabled anytime there is a call for cool-
ing (Y), heating (Y), or dehumidification (H) and can be used to
enable/disable field installed 2 way solenoid valve or circulator
pumps. When there is no call for cooling, heating, or
dehumidification, pump/valve relay is disabled.
WARNING
When refrigerant leak detection system installed, unit must be
powered except for service.
WARNING
Continuous air circulation required for proper functioning.
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Productinformatie
| Merk | Carrier |
| Model | Aquazone 50WD |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 15865 MB |
