Emerson 3000 User Manual

On each receiver at the condenser are two refrigerant-level sight glasses. Refrigerant level will vary 

with outside temperature. Check refrigerant level after the unit has been on for at least 15 minutes.
Sight Glass Levels

40°F (4.5°C) and lower—bottom sight glass is 3/4 full
40 to 60°F (4.5 to 15.5°C)—bottom sight glass is full
60°F (15.5°C) and higher—top sight glass is 3/4 full.

 * Components are not supplied by Liebert
    but are recommended for proper
    circuit operation and maintenance.
** Components supplied by Liebert
    and must be field-installed.

FACTORY PIPING

FIELD PIPING

**Piping Assembly

Condenser Coil

**Rotalock Valve

1/4" ( 6.4mm)
Pressure Relief
Valve * *

Sight Glass

Liebert
Lee-Temp
Receiver

Head Pressure
Control with
Integral Check
Valve

Check
Valve

Evaporator
Coil

Sensing Bulb

Expansion
Valve

Hot Gas
Bypass
Valve

Hot Gas
Bypass

Solenoid
Valves

Sight Glass

Fil

ter

 D

rie

r

Shutoff
Valve *

Liquid Return

External
Equalizers

Service
Valves

Scroll
Compressor

Liquid Return
from
Condenser

Inverted trap * on
discharge and liquid
lines to extend above base
of coil by a minimum
of 7-1/2" (190mm)

OPTIONAL PIPING

Hot Gas Discharge

Check
Valve

DPN000674
Rev. 3

* Trap at base
  of risers longer
  than 5ft. (1.5m)

* For rises over
  25ft. (7.6m), trap
  every 20ft. (6m) or
  at evenly spaced
  points (hot gas
  line only)