Lennox LGH120H Installation Instructions

Page 40
Hot Gas Reheat Start-Up And Operation
General
Hot gas reheat units provide a dehumidifying mode of
operation. These units contain a reheat coil adjacent to
and downstream of the evaporator coil. Reheat coil
solenoid valve, L14, routes hot discharge gas from the
compressor to the reheat coil. Return air pulled across
the evaporator coil is cooled and dehumidified; the
reheat coil adds heat to supply air. See figure 29 for
reheat refrigerant routing and figure 30 for standard
cooling refrigerant routing.
REHEAT
COIL
FIGURE 29
REHEAT MODE REFRIGERANT ROUTING
STAGE 1
CONDENSER
COIL
STAGE 2
CONDENSER
COIL
STAGE 2
EVAPORATOR
COIL
STAGE 1
EVAPORATOR
COIL
SUPPLY
AIR
RETURN
AIR
OUTDOOR
AIR
TWO
CONDENSER
FANS
STAGE 1
COMPRESSOR
STAGE 2
COMPRESSOR
EXPANSION
VALVE
CHECK
VALVE
REHEAT
VALVE
REHEAT
COIL
FIGURE 30
COOLING MODE REFRIGERANT ROUTING
STAGE 1
CONDENSER
COIL
STAGE 2
CONDENSER
COIL
STAGE 2
EVAPORATOR
COIL
STAGE 1
EVAPORATOR
COIL
SUPPLY
AIR
RETURN
AIR
OUTDOOR
AIR
TWO
CONDENSER
FANS
STAGE 1
COMPRESSOR
STAGE 2
COMPRESSOR
EXPANSION
VALVE
CHECK
VALVE
REHEAT
VALVE

Lennox LGH120H Specifications

General

Brand	Lennox
Model	LGH120H
Category	Air Conditioner
Language	English