30
Aquazone™ water source heat pump products are available
in a flexible, efficient array of models, which can be used in
all types of water loop, ground water, and ground loop
type systems. Use Aquazone products to provide optimal
energy efficient solutions and adapt to the most challeng-
ing design requirements.
AQUAZONE PRODUCT GUIDE
Water loop system
Water loop (or boiler/tower) system applications typically
include a number of units plumbed to a common piping
system. For optimal performance, design this system be-
tween 2.25 and 3 gpm per ton of cooling capacity. The
system is comprised of highly efficient packaged reverse
cycle heat pump units interconnected by a water loop. The
water circuit serves as both a sink and source for heat ab-
sorption and rejection and is designed for entering water
temperatures between 60 F and 90 F. Within this temper-
ature range, units can heat or cool from the same water
source. Transferring heat from warm to cold spaces in the
building, whenever they coexist, conserves energy rather
than creating new heat.
Refer to the Carrier Water Source Heat Pump Sys-
tem Design Guide for assistance designing water loop
systems. The guide includes a practical approach for the
latest and most current design recommendations including:
• Horizontal, vertical, console, rooftop and water-to-
water product applications.
• Ventilation methods and system design including energy
recovery.
• Acoustical considerations for different product types.
• Addressing IAQ issues such as condensate removal,
humidity control.
• Air distribution design including diffuser selection/
layout and ductwork design.
• Hydronic system design including pipe sizing/layout
and boiler/tower sizing.
• Control configurations such as stand alone, DDC, DCV,
and VVT
®
.
• WSHP efficiency/operational cost comparison chart.
• System variations such as a system without a boiler,
variable pumping, and VAV for interior use.
Ground water systems
To use Aquazone units in ground water applications,
the extended range should be specified. This will provide
factory-installed coaxial coil insulation to prevent conden-
sate from dripping when entering water temperatures are
below 60 F. In addition, the copper coaxial coil installed on
the Aquazone units may not be suitable for all water condi-
tions. Refer to the Water Conditioning section for proper
coaxial coil material selection.
Surface water system — This system is typically located
near a lake or pond. In this application, the loop can be
submerged in a series of coils beneath the water surface.
The number of coils required depends on system load and
design. This application requires minimum piping and
excavation.
Open loop system — Use this system where ground
water is plentiful. In this application, ground water is
pumped through supply piping from the well to the build-
ing. The water is then pumped back into the ground
through a discharge well as it leaves the building. An addi-
tional heat exchanger is usually installed between the build-
ing water piping system and the ground water piping sys-
tem. This design limits piping and excavation.
Aquazone units include a standard TXV and are rated to
extremely low temperatures to self-adjust the refrigeration
circuit. Therefore, open loop systems do not require water
regulating valves. Use a slow opening/closing solenoid
valve to conserve water.
Ground loop systems
There are many commonly specified designs for ground
loop applications. Typical designs include vertical loops
and horizontal loops. In some applications, water is piped
from the ground or lake directly to the water source heat
pump. This system only requires piping to get the water
from the source to the unit.
NOTE: When utilizing Aquazone water source heat pumps
in ground loop systems, refer to the design considerations
in the ground water system section.
Horizontal ground loop — Use this system when ade-
quate space is available and trenching can be easily accom-
plished. A series of parallel pipes are laid out in trenches 3
to 6 feet below the ground surface, and then back-filled.
Often, multiple pipes are used to maximize each trench’s
heat transfer capability. Ground conditions, heating and
cooling requirements, and system design determine piping
requirements and ground loop field size.
Vertical ground loop — Use this system in vertical bore-
hole applications. This design is well suited for retrofit
applications when space is limited or where landscaping is
already complete and minimum site disruption is desired.
The vertical ground loop system contains a single loop of
50 SERIES
TYPE
SIZE (tons)
APPLICATION
50HQP,VQP Large Capacity
6-10 (HQP)
6
1
/
2
-25 (VQP)
Environmentally sound unit with Puron
®
refrigerant (R-410A) designed to handle
large zoned areas for all geothermal and
boiler/tower applications.
50PC Compact
1
1
/
4
-5
Compact WSHP with Puron refrigerant
(R-410A) for boiler/tower, ground water, or
ground loop systems.
50PS Premium
Efficiency
1
/
2
-6
Premium, ultra efficient unit with Puron
refrigerant (R-410A) for new boiler/tower,
ground water, or ground loop systems
50PEC High Efficiency
Console
3
/
4
-1
1
/
2
Efficient console unit with Puron refrigerant
(R-410A) and attractive design for finished
interior, under-window installations.
50PT Premium
Efficiency
2-6
Premium, ultra efficient 2-stage unit with
Puron refrigerant (R-410A) for new boiler/
tower, ground water, or ground loop
systems
50PSW Water-to-Water
3-28
Efficient unit with Puron refrigerant
(R-410A) serves as an alternative to pre-
heat or cool air. Unit can be used as a
stand-alone or supplemental boiler/chiller
in most hydronic heating applications. Also
conditions process fluids, lubricants, and
refrigerants.
50RTG Rooftop
3-20
Economical solution for indoor air quality
(IAQ) problems and tempering ventilation
air.
50VS Premium Effi-
ciency Vertical
Stack Heat Pump
3
/
4
to 3 Tons
Ultra efficient unit with environmentally
sound Puron refrigerant (R-410A) for
boiler/tower and geothermal applications
(condominiums, hotels, etc.). Stacked
design allows for common piping and sim-
plistic design.
Application data
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