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POWER RECEPTACLE — A power receptacle is provided
in the Aquazone™ system control panel and is located in the
bottom left corner. Specifications for the power receptacle are
as follows:
Power: 120 vac
Rating: 15A @ 120 vac for receptacles
15A @ 120 vac for switch
250 V for fuse
WATER TEMPERATURE SENSORS — Two water tem-
perature sensors and thermowells have been provided with the
Aquazone system control panel. The first sensor is utilized to
read loop supply water temperature, such that the system
control panel can adjust heat rejection and heat addition
equipment to maintain the loop temperature based on user
input. The second sensor may be installed to monitor return
loop water temperature. The active sensing element is a highly
stable precision thermistor material accurate to within ± 0.36 F.
The temperature range of the sensor is 10 F to 230 F.
WATER PRESSURE SENSOR — A water pressure sensor is
provided with the Aquazone system control panel with variable
speed pumping only, and is utilized to operate variable frequen-
cy drives for system pumps. The water sensor senses system
pressure and the pressure is sent to the system control panel.
The Aquazone system control panel speeds up or slows down
the variable frequency drive to control the pump in order to
keep the system at the correct pressure.
When a variable frequency drive is used for system pump-
ing, the Aquazone water source heat pumps are typically
furnished with a factory or field-mounted solenoid valve that
allows water to flow though the heat pump. When solenoid
valves open, the system pressure drops, which results in the
variable frequency drive speeding up to allow the pump to
provide more water. When solenoid valves close, the system
pressure rises, which results in the variable frequency drive
slowing down to allow the pump to provide less water.
WATER FLOW SWITCH — A factory-provided water flow
switch is included with the Aquazone system control panel and
must be field-installed in the water loop piping. The flow
switch is connected to the control panel by a cable with a
watertight connector. This device uses a triac output that cannot
be connected directly to the Main Base Board. Therefore, a
control relay is used to signal the Main Base Board that loop
water flow is detected. The switch contains a fifteen-turn
adjustment potentiometer, to be used to adjust the set point in a
range of 3 to 60 cm/sec. The factory set point is 20 cm/sec.
Water Source Heat Pumps with PremierLink™
Controller Hardware —
When a CCN system installa-
tion is implemented, a factory-mounted PremierLink controller
is provided with the water source heat pump units. The package
from the factory includes the PremierLink controller, supply air
temperature sensor, and leaving water temperature sensor.
PREMIERLINK CONTROLLER — PremierLink controllers
can be provided with any Aquazone water source heat pump
product by selecting this option in the model nomenclature.
See Fig. 6.
The PremierLink controller is provided with the Complete C
unit controller. Factory supplied wiring is illustrated in Fig. 7.
The potentiometer switch may be adjusted down to zero
velocity (no flow) or above 60 cm/sec, however operation
in those ranges may not be linear or reliable.
Fig. 6 — PremierLink™ Control Module