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6
2.5 Piping Considerations
Consideration should be given before installing refrigerant and liquid lines next to, under or above
electronic equipment.
2.5.1 Drain Line
A 3/4" (19.1 mm) female pipe thread (FPT) connection is provided for the evaporator coil condensate
drain. This drain line also drains the humidifier, if applicable. The drain line must be located so it will
not be exposed to freezing temperatures. The drain should be at least the full size of the drain connec-
tion and pitched a minimum of 1/8" per ft. (11 mm per meter).
NOTE
This line may contain boiling water. Select appropriate drain system materials.
The Challenger ITR comes standard with a condensate pump will require a field-supplied trap
downstream from the pump. The drain line must comply with all applicable codes.
Table 2 Piping connection size
Air-Cooled Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50Hz)
Liquid Line O.D. Copper
L
Hot Gas Line O.D. Copper
HG
067A (065A) 1/2 7/8
Split System Fan Coil Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)
Liquid Line
L
Suction Line
SC
060E (059E) 1/2 O.D. Cu 1-1/8 O.D. Cu
All Units: Connection Sizes—in.
Humidifier Line
O.D. Copper
H
Condensate
Drain Line
C
Condensate Pump Line
O.D. Copper
P
Hot Water Reheat
O.D. Copper
1/4 1/2 OD Cu 1/2
Supply HWS Return HWR
5/8 5/8
Water/Glycol-Cooled Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)
Supply Line
S
Return Line
R
071WG (070WG) 1-1/8 1-1/8
GLYCOOL Unit Connection Sizes —in.
Model No. BR/BM
60Hz (50 Hz)
Supply Line
S
Return Line
R
061G (058G) 1-1/8 1-1/8
Chilled Water Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)
Supply Line
CWS
Return Line
CWR
102C (101C) 1-1/8 1-1/8