Reznor ADFH Unit Installation Manual - Manual (Page 16)

Form I-ADF, Page 16
Thread
bleed line
fitting (hose
barb) into
the adapter;
attach a
1/4" hose.
FIGURE 15 - Bleed Line Fitting Bleed Line Connection (Does not apply to module with optional timed meter-
ing system.) - Shipped in the evaporative cooling module bottom pan, find a
1/4" I.D. x 1/2" N.P.T. nylon bleed line fitting (hose barb). Thread the fitting into
the female adapter located opposite the pump/inlet side of the water distribu-
tion line. The hose barb will protrude from the side of the cabinet ( FIGURE
15). Attach a 1/4" I.D. hose to the barb and run the hose to the nearest drain.
Discharging a quantity of water by "bleed off" will limit the concentration of
undesirable minerals in the water being circulated through the cooling module.
Minerals buildup because evaporation only releases "pure water vapor" caus-
ing the concentration of contaminants in the water to increase as the evapora-
tion process continues to occur. The minerals accumulate on the media, in the
water lines, on the pump, and in the reservoir. Adequate bleed off is important
to maintaining an efficiently operating evaporative cooling system.
Supply and Drain Water Connections (cont'd)
Evaporative
Cooling
Module
Float valve inlet water connection
(1/4” compression) or inlet water
connection to solenoid valve
for metering system (1/2” male fitting)
Overflow fitting -
3/4” garden hose
thread tapped with
1/2” female NPT
Drain fitting - 3/4”
garden hose thread
tapped with
1/2” female NPT
2-way solenoid valve
(normally open)
3-way
solenoid
valve
To drain
Pressure regulator
(10 psi max)
Service valve
Roof Line
= Field supplied
= Field-installed water piping
A (N.O.) B (N.C.)
Water
inlet
FIGURE 14 - Water
Connections including
Optional Drain and Fill
Kit
Instructions for Installing Optional Fill & Drain Kit
NOTE: Follow this part of the instructions included in the valve pack-
ages for attaching valves to the water line only. The remainder of the
instructions with the valves do not apply to this type of application.
Water Line Connections (See illustration)
Supply (3-Way Valve) Connections - connect
the water supply line to "B" (normally closed).
Connect the water drain line to "A" (normally
open). Connect the middle outlet to supply
the water to the cooling module reservoir.
Drain (2-Way Valve) Connections - Connect
the drain pipe from the reservoir to "A". Con-
nect the outlet side to "B" and connect into
drain lines from the cooling reservoir and the
supply valve.
WARNING: Risk of electrical
shock. Disconnect the power.
Electrical Connection (requires black and
white 14-gauge wires) - Refer to furnace
wiring diagram:
1. Refer to the wiring diagram for terminal connections (NOTE: If kit is not ordered with the system, connections will not be
shown on the diagram. Terminal connections are specific to each system. Contact the factory for terminal connections. Be
prepared to provide all model information.)
2. Run field-supplied black wire from the electrical compartment (terminal on the wiring diagram) of the evaporative cooling
module and connect to the black wire on both the 3-way and the 2-way valve.
3. Run field-supplied white wire from the electrical compartment (terminal on the wiring diagram) of the evaporative cooling
module and connect to the white wire on both the 3-way and the 2-way valve.
6.0 Mechanical
(cont'd)
6.2 Unit Inlet Air
(cont'd)
6.2.4 Evaporative
Cooling Module -
Options AS4 and AS8
(cont'd)
All Cooling Modules - A manual water shutoff should be installed upstream of the
inlet, at a convenient non-freezing location, to allow the water supply to be turned on
and off. If necessary, install a bleed line between the manual valve and the cooling
module inlet to allow drainage of the line between the shutoff valve and the cooling
module.
All cooling modules are equipped with an overflow and drain fitting. The fittings are
in the cabinet bottom and come complete with a locknut and a sealing gasket. Check
these fittings for tightness before installing the overflow and drain piping. The drain and
overflow fitting will accommodate a 3/4" garden hose thread and is tapped with a 1/2"
female pipe thread for iron pipe.
An optional automatic fill and drain kit (Option CT1) is available that will automatically
release supply water to the cooling module when a call for cooling is made and will
drain all water from the reservoir when the cooling switch is deactivated or a cooling
thermostat is satisfied. See FIGURE 14. If installing an optional fill and drain kit, follow
the instructions. Consult the wiring diagram for electrical connections.