Site Preparation and Installation

2.5.3 Piping Connections

Details for refrigerant (R-22) loop piping are in 2.4.3 - Piping Connections and Coolant Require-

ments.

Figure 12 Piping connections - indoor air-cooled centrifugal fan condensing unit

Condenser Coil

Scroll

Compressor

High Pressure

Switch

Liquid Injection

Valve Bulb

Hot Gas Bypass

Solenoid Valve

Suction Line Male Quick

Connect Coupling

Suction Line Female Quick

Connect Coupling *

3/8" (9.5mm) FLR

Pressure Relief Valve

3 - Way Head

Pressure

Control Valve

Hot Gas Bypass

Control Valve

Check

Valve

Sight Glass

Sensing Bulb

External Equalizer

Liquid Injection

Valve

Service Access

Ports

Liquid Line

Solenoid Valve

*

Liquid Line Male Quick

Connect Coupling

Liquid Line Female Quick

Connect Coupling

Filter

Drier

Expansion Valve

Receiver Heater

Pressure Limiting

Switch

Lee - Temp

Receiver

Pressure Balancing

Valve

(Two circuits required, single circuit shown for clarity)

Evaporator Coil DPN000236_Rev0

2.5.4 Electrical Connections - Condensing Unit

Refer to 2.4.4 - Electrical Connections, Evaporator or Chilled-Water Unit and Figure 14 for

general wiring requirements and cautions. Refer to electrical schematic when making connections.

Refer to unit serial tag for full load amp and wire size amp ratings.

Power Connections

The condensing unit requires its own power source and earth ground, with a disconnect switch to isolate the unit for maintenance.

NOTE

Refer to serial tag for full load amp and wire size amp ratings

Control Connections

Field-supplied control wires must be connected between the evaporator and the condensing unit (See

Figure 14 and the electrical schematic on the units for more details.) Seven (7) wires are required

between the evaporator and condensing unit. Eighth and ninth wires are required on systems with hot gas bypass.

20

Site Preparation and Installation

Figure 13 Indoor air-cooled centrifugal condensing unit dimensions and pipe connections

Customer supplied threaded rods for module support from ceiling (1/2" minimum diameter recommended) (typ. 4).

13/16"

(21mm)

23 7/8 "

(606mm)

66 9/32 "

(1683.5mm)

CABINET

DIMENSION

59 13/16 "

(1519mm)

1 13/16 "

(40mm)

40 5/32 "

(1020mm)

CABINET

DIMENSION

19 1/32 "

(483mm)

8 13/16 "

(224mm)

1 3/32 "

(26mm)

16 5/16 "

(414mm)

26 3/8 "

(670mm)

42 17/32 "

(1080.3mm)

THREADED ROD

CENTERS

NOTE: Unit is spaced evenly in

reference to threaded

rod centers.

9/16" (14mm) dia. holes for threaded rods (typ. 2 each end)

64 1/4 "

(1632mm)

THREADED ROD

CENTERS

Hanger

Bracket

Shaded area indicates a recommended clearance of

30" (762mm) for component access and removal.

Air Inlet

Air Outlet

7/8" (22mm) & 1 1/8" (29mm) dia. knockouts electrical entrance for high voltage connection

Single Point Power Kit connection from Evaporator.

System 1 (3Ton) Suction Line Connection,

Aeroquip #11 Male.

System 2 (5Ton) Suction Line Connection,

Aeroquip #12 Male.

System 1 (3Ton) Liquid Line Connection,

Aeroquip #6 Male.

System 2 (5Ton) Liquid Line Connection,

Aeroquip #10 Male.

7/8" (22.2mm) dia. knockout electrical entrance for alternate control panel low voltage routing.

21

7/8" (22.2mm) dia. electrical entrance for low voltage connection.

DPN000248_Rev1

Site Preparation and Installation

Figure 14 Indoor air-cooled centrifugal condenser electrical connections

Field Supplied Unit Disconnect

Switch when Factory Unit

Disconnect Switch is not

Supplied.

Electric Service not by Liebert.

Line VoltageElectric Power Supply

Conduit.

Removable

Access Panels

Connection Terminal for

Field Supplied Earth

Grounding Wire.

Optional Factory Installed

Disconnect Switch.

Openings for Field Supplied

24V NEC Class 2 Wiring

Between Condensing Unit and

Fan/Coil Unit.

Low VoltageElectric Power

Supply Conduit Entrance.

6 "

(152.4mm)

4 "

(101.6mm) supplied 24V NEC class 2 wiring. See note 2.

Wire connections from evaporator module:

1. 24V GND System 1

2. 24V Supply System 1

3. High Pressure Alarm System 1

4. Hot Gas Bypass Connection System 1

(only on units with hot gas bypass.

If no hot gas bypass, connection is

provided in the evaporator module.

Connect wire 4 and wire 2 to the

24V supply).

5. 24V GND System 2

6. 24V Supply System 2

7. High Pressure Alarm System 2

8. Hot Gas Bypass Connection System 2

(only on units with hot gas bypass.

If no hot gas bypass, connection is

provided in the evaporator module.

Connect wire 8 and wire 6 to the

24V supply).

9. 24V GND Condenser Fan

10. 24V SUPPLY Condenser Fan

16 1/2 "

(419.1mm)

8 1/2 "

(215.9mm)

12 1/2 "

(317.5mm)

NOTES:

1. Refer to specification sheet for full load amp. and wire size amp. ratings.

2. Control voltage wiring must be a minimum of 16 GA (1.6mm) for up to 75’ (23m) or not

to exceed 1 volt drop in control line.

DPN000249_Rev0

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