Greenheck DGX User Manual

13
Installation - Evaporative Cooling Piping (Optional)
Installation
IMPORTANT!
The supply line should be of adequate size and pressure to resupply the amount of water lost due to
bleed-off and evaporation. The drain line should be the same size or larger than the supply line.
CAUTION!
All solenoids valves and traps must be installed
below the roof to protect the supply water line
from freezing. If they cannot be installed below
the roof, an alternative method must be used to
protect the lines from freezing
IMPORTANT!
The supply solenoid (Valve A) is NOT the same as
the drain solenoids (Valve B and Valve C). Make
sure to use the proper solenoid for each
location. Check you local code requirements for
proper installation of this type of system.
Step 1 Install the Water Supply Line
Connect the water supply line to the float valve in the unit. Install the 1/2 in. normally closed solenoid (Valve A)
in the supply line as shown above. Install the 1/4 in. normally open solenoid (Valve B) between the supply line
and the drain line. See figure #26.
Step 2 Install the Drain Line
Connect an unobstructed drain line to the sump drain.
Install the 3/4 in. normally open solenoid (Valve C)
between the sump drain connection and the drain
line. A trap should be used to prevent sewer gas from
being drawn into the unit. See figure #26 and #27.
Evaporative Cooling with Auto Drain and Fill
Evaporative Coolin
g
S
ectio
n
S
uppl
y
Lin
e
Sum
p
Overflo
w
S
um
p
Drai
n
Dr
a
in Lin
e
V
a
lv
e
A
To Water Suppl
y
V
a
lv
e
B
Valve
C
Step 3 Check/Adjust Water Level
Check the water level in the sump tank. The water
level should be above the pump intake and below the
overflow. Adjust the float as needed to achieve the
proper water level.
6 in. min.
6 in. min.
Figure 26. Auto-Drain and Fill Evaporative Piping
Figure 27. Drain Trap

Greenheck DGX Specifications

General

Brand	Greenheck
Model	DGX
Category	Fan
Language	English