ClimateMaster trilogy 45 q-mode series, User Manual

Page: 15 / 56

Trilogy
®
45 Q-Mode
®
(QE) Series
QE
15
Residential Products Technical Guide
vFlow
®
Internal Variable Water Flow
Industry- fi rst, built-in vFlow
®
replaces a traditionally inef fi cient,
external component of the geothermal system (watemr
circulation) with an ultra-high-ef
fi cient, variable speed,
internal water fl ow system. This saves homeowners 70-80%
on operating water circulator vs traditional single speed
pump systems. It saves installers time and labor by avoiding
installing bulky external
fl ow centers or fl ow regulators. Multi-
unit installations are also much simpler with vFlow
®
systems,
as the units automatically adjust water fl ow across the system.
vFlow
®
is enabled by iGate
®
, which facilitates intelligent
communication between the thermostat, DXM2 control,
sensors and internal water pump to make true variable water
fl ow a reality.
vFlow
®
delivers three main benefi ts:
1) Easier and quicker unit installation as the fl ow control is
built in to the unit.
2) Superior reliability by varying the water fl ow to deliver more
stable operation.
3) Higher cost savings by varying the fl ow (and pump watt
consumption) to match the unit’s mode of operation.
Internal components
Trilogy ® 45 can be
installed more easily
and compactly than its
predecessors because
water-
fl ow components
are internal to the unit.
It also saves installing
contractors labor and
time by eliminating the
need for an external
fl ow regulator or a
bulky external pumping
module. Included are variable-speed pump,
fl ushing ports,
3-way fl ushing valves, and expansion tank.
Variable fl ow
vFlow
®
technology enables variable water fl ow through the
unit, with the DXM2 control adjusting the pump speed to
maintain an installer-set loop
∆ T. By controlling the water
fl ow, the system is able to operate at its optimal capacity and
ef fi ciency. vFlow ® provides a lower fl ow rate for part load where
units typically operate 80% of the time and a higher, more
normal
fl ow rate for full load operation.
vFlow
®
Internal Variable Water Flow Control
193
74
430
Pump
Watts
3 Ton
System
4 Ton
System
External
Pump
96
448
141
5 Ton
System
Variable speed pump
delivers variable water-
fl ow,
controlled by DXM2 control,
based on loop water
∆ T.
Energy Savings with water circulation control
Units with vFlow
®
deliver higher operating cost savings by
varying the water fl ow to match the unit’s operation (ex: lower
water fl ow when unit is in part load operation). Lowering the
fl ow results in lower energy consumption by the water pump
(=higher cost savings) in vFlow ® units (whether internal or
external pump).
In closed loop applications, using vFlow
®
with an internal
variable-speed (ECM) fl ow controller, the ECM pump uses
fewer watts than a fi xed speed (PSC) pump, even at full load
(see chart). The ECM pump excels in energy savings in part
load, saving 70–80% watts compared to
fi xed speed pumps
(see chart). The ECM pump can operate with independent
fl ow rates for heating and cooling, further saving even more
energy.