Piping Schematics
109
Figure 82 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton) with scroll
compressor models, with EC fan
Point Description
X
in. (mm)
Y
in. (mm)
Connection Size / Opening
in. (mm)
R Refrigerant Access 81-3/4 (2076) 14-3/4 (374) 12-3/16 (310) X 4" (102)
53kW (15 Tons) / 70 & 77kW (20 & 22 Tons)
L1 Liquid Line System 94-11/16 (2405) 16-3/4 (425) 1/2 / 5/8" Cu Sweat
L2 Liquid Line System 2 91-7/8 (2334) 16-3/4 (425) 1/2 / 5/8" Cu Sweat
G1 Hot Gas Discharge 1 88-3/4 (2254) 16-3/8 (416) 7/8 / 1-1/8" Cu Sweat
G2 Hot Gas Discharge 2 85-9/16 (2173) 16-3/8 (416) 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"
B1 Blower Outlet 4-1/2 (114) 33 (838) 58-3/8 x 30 (1483x762)
* 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)
A
A
L1
L2
G1
G2
R
LV1
LV2
LV3
O
X
Y
B1
DPN002182
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
E1 E2
BLOWER
OUTLET
98" (2489mm)
35"
(889mm)
4" (102mm)
12-3/16"
(310mm)
HUM
CD
All dimensions from
rear corner of unit
including panels
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