Reznor REC (Evaporative Cooling) Unit Installation Manual - Manual (Page 11)

Form I-REC, P/N 160201 R3, Page 11
PROBLEM PROBABLE CAUSE REMEDY
Pump doesn’t run – Unit
is calling for cooling (i.e.
console control switch is in
cool or summer position)
and reservoir is full .
1. Electrical connections (low voltage) 1. Verify all electrical connections. Verify correct voltage at pump terminals H
& J in REC junction box. See wiring diagram and Paragraph 4.0.
2. Electric float switch. 2. Check position of the actuators on the electric float switch.
3. Dirty pump. 3. Clean pump. See Paragraph 6.0.
4. Defective pump. 4. Replace pump.
Required water level (3”)
not being maintained
(pump & float control
system)
1. Float valve 1. Adjust float valve. See Paragraph 3.2.3.
2. Optional drain and fill valves 2. Check valves for proper operation. See FIGURE 9.
3. Incorrect overflow pipe nipple (should
be 3-1/2”).
3. Replace pipe nipple.
4. Drain leaking. 4. Tighten drain fittings
Water running off of media
pads
1. Excessive water flow 1. Adjust ball valve in distribution line. See Paragraph 5.0.
2. Media pads need cleaned or replaced 2. Clean or replace media pads. See Paragraph 6.1.
Water not distributing
evenly
1. Distribution line clogged. 1. Flush distribution line. See Paragraph 6.2.
2. Holes in distribution line turned 2. Check position of distribution line. Holes should be spraying upward
toward diffuser. If not positioned with holes toward top, adjust position of line.
3. Pump not running on correct voltage. 3. Check voltage at pump terminal in cooling module junction box
Media pads becoming
clogged and discolored
quickly (scale and salt
deposits)
1. Bleedoff line clogged or inadequate
bleedoff (pump & float control system)
1. Clean bleed line. See Paragraph 3.2.3. A uniform buildup of minerals on
the entering air face of the media indicates insufficient bleedoff. Increase the
rate until the mineral deposits dissipate.
2. Excessive water flow. 2. Reduce flow by adjusting ball valve in distribution line. See Paragraph 5.0.
Water blowoff from media
pads or water being pulled
from reservoir.
1. Media pads installed incorrectly. 1. Install media pads correctly. See Paragraph 6.1.
2. Requires moisture elimination pad
(over 600 FPM).
2. Install moisture elimination pad. Follow instructions, Paragraph 3.1.2.
3. Water level not 3” (pump & float
system).
3. See second problem listed (Required water level not being maintained)
6.4 Troubleshooting
Chart
WARNING: Disconnect the power before servicing the cooling
module. Failure to do so can cause electrical shock, personal
injury, or death.
APPENDIX
FIGURE 17 - Model REC
Size 360 (two Size 180
evaporative cooling
modules) attached to a
Model RDF Direct-Fired
System
REC180
with right
side
controls
REC180
with left
side
controls
12” (305mm)
129-1/2’
(3289mm)
127-1/2”
(3239mm)
48”
(1219mm)
Field-Supplied
Transition Duct
1” (25mm) 1” (25mm)
56-3/4” (1441mm)
56-13/16”
(1443mm) - typ.
5-1/2”
(140mm)
Adjustable Legs
16” (406mm) max.
9” (229mm) min.
Control/Pump
Access Door
Water
Connection
1/4” tubing
2”(50mm) typ.
2”(50mm) typ. 2”(50mm)
6” (152mm)-typ. 6”
(152mm)
56-5/16”
(1430mm) - typ.
9-17/32” (242mm) - typ.
Drain & Overflow Connections
5” (127mm)
Drain & Overflow Connections
Supply
Wiring
Gas Supply
24V
Wiring
TOP
View
TOP
View
Model RDF Top View
REC Air Inlet View
7/8”
(22mm)
24-1/8” (613mm)
48” (1219mm)
Maximum
Length
Side View - Model RDF
with Model REC360 attached
Field -
Supplied
Transition
Duct 45-5/16” (1151mm)
REC
Adjustable
21-9/16” (548mm) max.
14-9/16” (370mm) min.
21-1/2” (546mm)
Dimensions -
Model REC 360
Cross-Reference
Application Chart
Reznor ® Model Packaged Makeup Air System or Blower Cabinet REC
RGB/RPB 75, 100, 125; RDF-1-20 40
RGB/RPB 150, 175; RDF-1-40; ADF/ADFH 300; RBA Blower Cabinet 50
RGB/RPB 200, 225 60
RGB/RPB 250, 300; RDF-1-50, -1-65; ADF/ADFH 500 70
RGB/RPB 350 80
RGB/RPB 400 90
RBL Blower Cabinet; All Sizes of RGBL/RPBL/SSCBL/PGBL; All Sizes
of RDF-2; ADF/ADFH 1200; RDF-3 up to 17,730 CFM
180
RDF Models 11,000 to 28,000 CFM 360