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Piping Schematics
94
Figure 69 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton), semi-hermetic
compressor models
Point Description
X
inches (mm)
Y
inches (mm)
Connection Size / Opening
inches (mm)
R Refrigerant Access 82-3/4 (2102) 13-7/8 (352) 16-7/16 x 4 (418 x 102)
53kW (15ton) / 70 & 77kW (20 & 22ton)
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 * 69-1/4 (1759) 30 (762) 3/4 FPT
W/ Optional Pump 69-1/4 (1759) 30 (762) 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 72 (1829) 29 (737) 2-1/8 Cu Sweat
HS Hot Water Reheat Supply Consult Factory
HR Hot Water Reheat Return Consult Factory
E1 Electrical Connection (High Volt) 78-1/2 (1994) 31-1/8 (790) 2-1/2
E2 Electrical Connection (High Volt) 75-3/8 (1915) 31-1/8 (790) 2-1/2
LV1 Electrical Connection (Low Volt) 1-7/8 (48) 28-1/2 (724) 7/8
LV2 Electrical Connection (Low Volt) 1-7/8 (48) 30-1/4 (768) 7/8
LV3 Electrical Connection (Low Volt) 1-7/8 (48) 32 (813) 7/8
B1
Blower Outlet (15 x 15) 23-1/8 (587) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
Blower Outlet (15 x 11) 27-3/4 (705) 18-1/16 (459) 14-3/4 x 16-1/16 (375 x 408)
B2
Blower Outlet (15 x 15) 50-3/8 (1280) 18-1/16 (459) 18-3/4 x 16-1/16 (476 x 408)
Blower Outlet (15 x 11) 54-3/8 (1381) 18-1/16 (459) 14-3/4 x 16-1/16 (375 x 408)
* Field-pitch condensate drain line a minimum of 1/8" (3.2mm) per foot (305mm). 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-Cool systems only (4-pipe system)
Section A-A
Front View
16-1/16"
(408 mm)
AA
X
Y
O
35"
(889mm)
All dimensions
from rear corner
of unit including
panels
Tolerance on all
piping dimensions
is ± 1/2" (13mm)
109"
(2769mm)
Front of Unit
Note: Drawing not to scale
DPN000928
Rev. 2
4" (102mm)
LV3
LV2
LV1
ECS
HUM
CD
ECR
E1 E2
B2
16-7/16"
(418mm)
L1 L2 G1 G2
Blower
Outlet
B1
Blower
Outlet
R