Lennox ECOLEAN EAC 0091 S Installation, Operating And Maintenance page 21

1.- GENERAL CHARACTERISTICS
1.8.- PIPING DRAWINGS
ST1
Water
inlet
FS ST2
Water
outlet
Plate exchanger
Pressure gauge
Flow switch (option in standard version)
Water inlet probe (water inlet regulation)
Water outlet probe (anti-freeze protection)
Piping probe circuit 1 (defrost temperature)
Piping probe circuit 2 (defrost temperature)
6
Crank case heater
CH1
Crank case heater
CH2
Crank case heater
CH3
Condensing pressure control ON/OFF fan motor
HPR11
Condensing pressure control. Low/high speed
HPR12
HEAT PUMP UNITS EAR 1003S TO 1303S
Scroll compressor
S
LP11 LP12
S
Scroll compressor
SV 1
Hot gas injection valve (option)
cooling mode
LP21 LP22
S
Scroll compressor
SV 2
Hot gas injection valve (option)
cooling mode
HP1 HPR11 HPR12
SVR 1 (solenoid valve)
Liquid receiver
Filter
drier
HP2 HPR21 HPR22
SVR 2
(solenoid valve)
Liquid receiver
Filter
drier
Condensing pressure control ON/OFF fan motor
HPR21
Condensing pressure control. Low/high speed
HPR22
Low pressure switch cooling cycle circuit 1
Low pressure switch heating cycle circuit 1
Low pressure switch cooling cycle circuit 2
Low pressure switch heating cycle circuit 2
High pressure switch circuit 1
High pressure switch circuit 2
End pressure defrost circuit 1
HPD1
End pressure defrost circuit 2
HPD2
20
4-way
HPD1
valve
Coil
HGBP
ST3
Expansion
(Hot gas by-pass
valve
heating mode.
Low ambient
temperature -15ºC
(option))
Restrictor
Check valve
4-way
Coil
HPD2
valve
HGBP
ST6
Expansion
(Hot gas by-pass
valve
heating mode.
Low ambient
temperature -15ºC
(option))
Restrictor
Check valve
Fan motor
Fan motor