SECTION 26: RAPID
®
4000-S
ERIES
S
TART
-U
P
P
ROCEDURES
: E
VAPORATIVE
C
OOLER
149 of 154
D. Conductivity Control (Control Packa
g
e #2)
A cond
u
cti
v
ity controller monitors the electrical cond
u
ctance of the cooling
w
ater. If the cond
u
cti
v
ity of the
cooling
w
ater exceeds the front panel setpoint, the controller acti
v
ates a "blo
w
do
w
n" process. D
u
ring this
process, some of the highly cond
u
cti
v
e
w
ater is drained from the s
u
mp and fresh
w
ater is added to dil
u
te the
concentrated
w
ater. When the cond
u
cti
v
ity le
v
el falls belo
w
the setpoint, the controller sh
u
ts do
w
n the
"blo
w
do
w
n" process. Refer to the calibration proced
u
re in the Cond
u
cti
v
ity Controller Installation, Operation
and Ser
v
ice Man
u
al.
___ Cond
u
cti
v
ity controls
w
ork properly. Operation can be sim
u
lated by depressing and holding the
"sim
u
lator" b
u
tton on the cond
u
cti
v
ity controller
w
hile the e
v
aporati
v
e cooler is in operation. This
w
ill
open the "blo
w
do
w
n" contact, de-energizing the timer and open the s
u
mp drain
v
al
v
e. When the
"sim
u
lator" b
u
tton is released, the "blo
w
do
w
n" contact closes. This energizes the time clock for fi
v
e
min
u
tes. After fi
v
e min
u
tes, the drain
v
al
v
e closes.
E. Auto Flush Control (Control Packa
g
e #3)
___ Water s
u
pply line and fl
u
sh
v
al
v
e solenoid (normally closed) are installed in the proper location at the
top of the e
v
aporati
v
e cooler. (See mechanical dra
w
ing #40085830.)
___ Fl
u
sh
v
al
v
e solenoid is
w
ired properly.
___ The time clock sched
u
le is set to desired a
u
to fl
u
sh inter
v
al and length of a
u
to fl
u
sh.
___ A
u
to fl
u
sh circ
u
it
w
orks properly. When time clock initiates a
u
to fl
u
sh seq
u
ence, the fl
u
sh
v
al
v
e solenoid
(normally closed) open and s
u
pplies fresh
w
ater o
v
er the media. At the same time, the p
u
mp motor de-
energizes and the s
u
mp drain
v
al
v
e opens to drain s
u
mp.
F. Comments
Summary of Contents for 4044
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Page 73: ...SECTION15 VIBRATION ISOLATION 65 of 154 FIGURE 52 Curb Mounted Roof Curb Roof Curb...
Page 109: ...SECTION19 ELECTRICAL 101 of 154...
Page 110: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 102 of 154...
Page 111: ...SECTION19 ELECTRICAL 103 of 154...
Page 112: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 104 of 154...
Page 113: ...SECTION19 ELECTRICAL 105 of 154...
Page 114: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 106 of 154...
Page 115: ...SECTION19 ELECTRICAL 107 of 154...
Page 116: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 108 of 154...
Page 117: ...SECTION19 ELECTRICAL 109 of 154...
Page 118: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 110 of 154...
Page 119: ...SECTION19 ELECTRICAL 111 of 154...
Page 121: ...SECTION 20 DIRECT FIRED BURNER 113 of 154 FIGURE 71 Midco HMA 2A Burner...
Page 122: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 114 of 154...
Page 125: ...SECTION 20 DIRECT FIRED BURNER 117 of 154...
Page 126: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 118 of 154...
Page 127: ...SECTION 20 DIRECT FIRED BURNER 119 of 154 20 3 Honeywell UV Flame Detector...
Page 160: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 152 of 154...
Page 161: ...SECTION 27 THE RAPID 4000 SERIES WARRANTY 153 of 154...
Page 162: ...4000 SERIES INSTALLATION OPERATION AND SERVICE MANUAL 154 of 154...
