11
c l i m a t e m a s t e r.c o m
Tranquility
®
30 Digital (TE) Series IOM - 60Hz HFC-410A
R e v. : O c t o b e r 5 , 2 0 2 1
vFlow
®
Heat Pump Applications Overview
Figure 11a: Typical Closed-Loop Application (with
Internal Flow Controller Shown)
High and
Low Voltage
Knockouts
Vibration Isolation Pad
To Thermostat
Internal Flow
Controller
Water In
Water Out
Figure 11b: Typical Open Loop Application (with Internal
Modulating Motorized Valve Shown)
For use on applications using external source for flow
Internal Motorized
Modulating Valve
Water Out
Shut Off
Ball Valves
for Isolation
Water In
Pressure
Tank
Optional
Filter
Boiler
Drains
⚠
CAUTION!
⚠
CAUTION!
The following instructions represent industry
accepted installation practices for closed loop earth
coupled heat pump systems. Instructions are provided
to assist the contractor in installing trouble free ground
loops. These instructions are recommendations only.
State/provincial and local codes MUST be followed and
installation MUST conform to ALL applicable codes. It is
the responsibility of the installing contractor to determine
and comply with ALL applicable codes and regulations.
vFlow
®
is a revolutionary new, intelligent, and efficient way to
circulate water (or water plus antifreeze) using
INTERNAL,
variable water flow control. The factory-installed high-
efficiency variable-speed pump uses 60%-80% less wattage
than a traditional fixed speed pump. vFlow
®
technology
improves performance of the unit by reducing the amount
of energy required to optimize the flow of water throughout
a GHP System and also reduces the space, cost, and labor
required to install external water flow control mechanisms
(flow controllers, solenoid and flow control valves).
vFlow
®
Configurations (Optional - Model Digit 12 must be 2,
5, or 6):
1)
Internal Flow Controller - For Closed
Loop Applications
This is the most common configuration for closed loops.
With this factory-installed option, the unit is built with an
Internal Variable Speed Pump and other components
to flush and operate the unit correctly (including an
expansion tank, flush ports and flushing valves). The
pump speed is controlled by the DXM2 control based on
the difference in entering and leaving water temperatures
(ΔT). The Internal Flow Controller pump includes an
internal check valve for multiple unit installations. A
copper water coil is standard with this option.
Note: Internal Flow Controllers are also very suitable
for multiple unit installations depending on pump
performance requirements.
2)
Internal Modulating Motorized Valve – For Large
Closed Loop Applications (external central pumping)
Primarily for use on multi-unit closed loop applications
with central pumping. With this factory-installed option,
the unit includes a low pressure drop modulating
motorized valve that is controlled by the DXM2
microprocessor control based on the difference in the
entering and leaving water temperatures (ΔT). A Copper
Water Coil is standard with this option. The modulating
valve in this option has a higher Cv than the open loop
option.
3)
Internal Modulating Motorized Valve - For Open
Loop Applications
For use on open loop applications. With this
factory-installed, option, the unit is built with an
internal modulating motorized valve controlled by
the Communicating DXM2 control board based on
entering and leaving water temperatures (ΔT). A low Cv
modulating motorized valve is used for this application to
provide more precise control against the higher system
pressure differential of open loop applications. A Cupro-
Nickel water coil comes standard with this option.
Details on these options are included in the following sections
on ground loop and ground water applications.
