User manual

Piping Schematics
109 Liebert
®
DS
™
Figure 81 Primary connection locations downflow air cooled 53-77kW (15-22 tons) semi-hermetic
compressor models, with EC fans
Point Description
X
in. (mm)
Y
in. (mm)
Connection Size / Opening
in. (mm)
R Refrigerant Access 82-3/4 (2102) 13-7/8 (352) 16-7/16 x 4 (4181 x 102mm)
53kW (15 Tons)/70 & 77kW (20 & 22 Tons)
L1 Liquid Line System 1 97 (2464) 16-7/8 (428) 1/2" / 5/8" Cu Sweat
L2 Liquid Line System 2 93-5/16 (2370) 16-7/8 (428) 1/2" / 5/8" Cu Sweat
G1 Hot Gas Discharge 1 90-5/8 (2302) 16-5/8 (422) 7/8" / 1-1/8" Cu Sweat
G2 Hot Gas Discharge 2 88 (2235) 16-5/8 (422) 7/8" / 1-1/8" Cu Sweat
CD
Condensate Drain (infrared
humidifier or no humidifier)*
68-3/8 (1737) 31-3/8 (797) 3/4" FPT
W/ Optional Pump 68-3/8 (1737) 31-3/8 (797) 1/2" Cu Sweat
HUM Humidifier Supply Line 76-1/2 (1943) 29 (736) 1/4 Cu Sweat
ECS** Econ-O-Coil Supply 78-5/8 (1997) 22-1/4 (565) 2-1/8 Cu Sweat
ECR** Econ-O-Coil Return 73-15/16 (1862) 26-9/16 (675) 2-1/8 Cu Sweat
HS Hot Water Reheat Supply CONSULT FACTORY
HR Hot Water Reheat Return CONSULT FACTORY
E1 Electrical Conn. (High Volt) 78-1/2 (1994) 31-1/8 (790) 2-1/2"
E2 Electrical Conn. (High Volt) 75-3/8 (1915) 31-1/8 (790) 2-1/2"
LV1 Electrical Conn. (Low Volt) 2 (51) 29 (737) 7/8"
LV2 Electrical Conn. (Low Volt) 2 (51) 30-7/8 (784) 7/8"
LV3 Electrical Conn. (Low Volt) 2 (51) 32 (813) 7/8"
* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual Cooling Systems only (four-pipe system)
Source: DPN002179, Rev. 0
L1
L2
G1
G2
R
B1
LV 1
LV 2
LV 3
O
X
Y
A
A
DPN002179
Rev. 0
FRONT OF UNIT
FRONT VIEW
SECTION A-A
Note: Drawing not to scale.
Tolerance on all piping
dimensions is ± 1/2" (13mm).
ECS ECR
CD
E1 E2
BLOWER
OUTLET
109" (2769mm)
35"
(889mm)
4" (102mm)
16-7/16"
(418mm)
HUM
All dimensions from
rear corner of unit
including panels