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www.DaikinApplied.com 47
IM 970-2 • MAVERICK I ROOFTOP
Figure 37: Refrigerant Path – Normal Cooling
Figure 38
shows the refrigerant path during the reheat
mode. When the reheat cycle is energized, a solenoid valve
downstream of the reheat coil opens, a solenoid valve ahead
of the TXV closes, and a solenoid valve in the compressor
discharge line opens. The liquid refrigerant leaves the TXV
with the sudden pressure drop causing the liquid to expand
to a vapor and absorbing the heat from the supply air going
through the evaporator coil. The refrigerant vapor then travels
to the compressor where it is elevated to a higher pressure
and temperature. The refrigerant next carries the heat to
a parallel path between the outside condenser coil and a
bypass circuit. Some of the heat is rejected outdoors. The
ratio of heat rejected outdoors versus indoors is controlled
by a variable frequency drive (OFMC) on the outdoor fan that
monitors the liquid line temperature of the outdoor coil. This
2-phase refrigerant vapor is then sent to the reheat coil. As the
refrigerant travels through the reheat coil it condenses into a
subcooled liquid where the process repeats itself.
Figure 38: Refrigerant Path – Reheat Mode
During reheat mode the outdoor fan motor controller (OFMC)
slows the outdoor fan(s) to increase the discharge pressure/
temperature to maintain an optimized amount of reheat
required to provide neutral air to the occupied space. The
factory setting for the outdoor fan motor controller is 90°F
which will provide neutral air +1 to -5°F from the entering air
temperature (example if the entering or return air temperature
is 75°F the leaving or supply air temperature will be 76° to
70°F during the reheat mode. If field adjustment is required
to raise or lower the leaving air temperature this may be
accomplished by turning the temperature control dial on the
outdoor fan motor controller (OFMC). Turning the dial to a
higher temperature setting will raise the leaving or supply air
temperature and turning the dial to a lower setting will reduce
the leaving or supply temperature.
Figure 39: Dehumidification Controller
Figure 40: Solenoid Locations
DISCHARGE SOLENOID
VALVE
REHEAT
SOLENOID
VALVE
LIQUID LINE
SOLENOID VALVE
TXV
DISCHARGE SOLENOID
VALVE
REHEAT
SOLENOID
VALVE
LIQUID LINE
SOLENOID VALVE
TXV
LIQUID LINE
SOLENOID
REHEAT SOLENOID
REHEAT
COIL
DISCHARGE
SOLENOID
Содержание Maverick I MPS A03C
Страница 21: ...Wiring Diagrams www DaikinApplied com 21 IM 970 2 MAVERICK I ROOFTOP Figure 23 Wiring Diagram MPS A05C...
Страница 51: ...Maintenance www DaikinApplied com 51 IM 970 2 MAVERICK I ROOFTOP Figure 42 System Charge Chart MPS A04C Cooling...
Страница 52: ...IM 970 2 MAVERICK I ROOFTOP 52 www DaikinApplied com Maintenance Figure 43 System Charge Chart MPS A05C Cooling...
Страница 54: ...IM 970 2 MAVERICK I ROOFTOP 54 www DaikinApplied com Maintenance Figure 46 Speed Tap Examples...
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