Emerson CW089, Design Manual

Page: 72 / 132

Piping
Liebert
®
CW
™
System Design Manual 62
5.3 Piping Connections—Downflow Models
with Forward-curved Blowers
Figure 5-10 Piping connections, downflow, CW026 – CW084 with forward-curved blowers
Piping Connections, in.
Model Number
A
OD Cu
B
OD Cu
C
NPT Male
D
OD Cu
E
NPT Male
F
OD Cu
CW026 1-1/8 1-1/8
1/2
5/8
1/2
5/8 CW038 1-3/8 1-3/8
CW041
1-5/8 1-5/8
CW051
7/8 7/8
CW060
2-1/8 2-1/8 3/4 3/4 CW079
CW084
OPTIONAL STEAM HUMIDIFIER
OPTIONAL STEAM REHEAT
OPTIONAL HOT WATER REHEAT
OPTIONAL HOT WATER REHEAT
(2-WAY VALVE)
(3-WAY VALVE)
HOT WATER REHEAT COIL
Y-STRAINER
SUPPLY
RETURN
ACTUATOR
HOT WATER REHEAT COIL
Y-STRAINER
SUPPLY
RETURN
ACTUATOR
SUPPLY
RETURN
STEAM TRAP
STEAM HUMIDIFIER
Y-STRAINER
ACTUATOR
STEAM REHEAT COIL
STEAM TRAP
RETURN
Y-STRAINER
SUPPLY
OPTIONAL REHEAT SCHEMATICS
NOTE: Install all piping
per local codes.
Condensate Drain. Field pitch a min. of
1/8" (3mm) per ft. (305mm). 3/4" NPT for units
without factory installed condensate pump. Do
not install an external trap. 1/2" OD CU for units
with factory installed condensate pump.
1/4" OD CU Humidifier Supply Line (Steam Gen./Infrared)
B - Chilled Water Return Line.
- Chilled Water SUPPLY LINE on units with HIGH PRESSURE
2 WAY VALVE ONLY.
A - Chilled Water Supply Line.
- Chilled Water RETURN LINE on units with HIGH PRESSURE
2 WAY VALVE ONLY.
C - Steam Reheat Supply Line
D - Hot Water Reheat Supply Line.
E - Steam Reheat Return Line (Field
install factory supplied steam
trap with vacuum breaker).
F - Hot Water Reheat Return Line.
1/2" NPT Male Steam Humidifier Supply Line.
1/2" NPT Male Steam Humidifier Return Line.
NOTE: SEE APPROPRIATE CABINET DIMENSIONAL DATA SUBMITTAL FOR PIPING OPENING SIZES.
DPN003196
Rev. 1