Lennox Diplomat 10HP12 Information page 11

SERVICE
VALVES
10HP18 AND LARGER TYPICAL REFRIGERATION COMPONENTS
A – Pumping Down System
CAUTION
Deep vacuum operation (operating compressor
below 0 psig) can cause internal fusite arcing
resulting in a damaged or failed compressor. This
type of damage will result in denial of warranty
claim.
10HP12 REFRIGERATION COMPONENTS
DISTRIBUTOR
LIQUID LINE
SERVICE PORT
DEFROST
SWITCH S6
FILTER/DRIER
W/INTERNAL
CHECK VALVE
EXPANSION VALVE
STRAINER
LIQUID LINE FROM INDOOR COIL
TO OUTDOOR COIL
FIGURE 20
ACCUMULATOR
10HP42, 48 AND 60 ONLY
DISTRIBUTOR
COMPRESSOR
LIQUID LINE
SERVICE PORT
DEFROST
SWITCH S6
SERVICE
VALVES
FIGURE 21
Page 11
SUCTION
MUFFLER
VAPOR LINE FROM
INDOOR COIL
REVERSING VALVE
FILTER/DRIER
W/INTERNAL
CHECK VALVE
The system may be pumped down when leak checking
the line set and indoor coil or making repairs to the line
set or indoor coil.
1– Attach gauge manifold.
2– Front seat (close) liquid line valve.
3– Start outdoor unit in cooling mode.
4– Monitor suction gauge. Stop unit when 0 psig. is
reached.
5– Front seat (close) suction line valve.
SUCTION LINE
ACCUMULATOR
SENSING
BULB
DISCHARGE LINE
SERVICE PORT
MUFFLER
ROTARY COMPRESSOR
SUCTION LINE
SENSING BULB
TO
OUTDOOR COIL
REVERSING
VALVE
DISCHARGE LINE
SERVICE PORT
VAPOR LINE FROM
INDOOR COIL
MUFFLER
STRAINER
EXPANSION VALVE
LIQUID LINE FROM
INDOOR COIL