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L. Where the local conditions prevent the use of a
gravity drainage system to a lake or pond, you can
instead run standard plastic piping out into the pond
below the frost and low water level.
WARNING
Thin ice may result in the vicinity of the
discharge line.
For complete information on water well systems and
lake and pond applications, refer to Manual 2100-078
available from your distributor.
COOLING TOWER / BOILER
APPLICATION
The cooling tower and boiler water loop temperature is
usually maintained between 50°F to 100°F to assure
adequate cooling and heating performance.
In the cooling mode, heat is rejected from the unit into
the source water loop. A cooling tower provides
evaporative cooling to the loop water thus maintaining a
constant supply temperature to the unit. When utilizing
open cooling towers chemical water treatment is
mandatory to ensure the water is free from corrosive
minerals.
It is imperative that all air be eliminated from the source
closed loop side of the heat exchanger to insure against
fouling.
Q
G
P
M
P
S
G I
3
1
0 .
0
4
1
4 .
2
5
1
8 .
3
6
2
2 .
4
7
2
6 .
6
8
-
- -
9
-
- -
1
0
-
- -
1
1
-
- -
1
2
-
- -
1
3
-
- -
Manual 2100-419E
Page
40 of 48
WATER FLOW AND PRESSURE DROP
W
2
4
2
Q
W
F
. t
H
. d
P
S
G I
2
3 .
1
-
- -
3
2 .
8
1
0 .
0
4
2 .
2
1
4 .
3
5
1 .
7
1
8 .
6
6
1 .
4
2
3 .
0
-
- -
2
7 .
3
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
In the heating mode, heat is absorbed from the source
water loop. A boiler can be utilized to maintain the loop
at the desired temperature. In milder climates a
"flooded tower" concept is often used. This concept
involves adding makeup water to the cooling tower
sump to maintain the desired loop temperature.
Water piping exposed to extreme low ambient
temperatures are subject to freezing.
Units are equipped with female pipe thread fittings.
Consult the specification sheets for sizes. Teflon tape
sealer should be used when connection to the unit to
insure against leaks and possible condenser fouling. Do
not overtighten the connections. Flexible hoses should
be used between the unit and the rigid system to avoid
possible vibration. Ball valves should be installed in the
supply and return lines for unit isolation and unit water
flow rate balancing.
Pressure / temperature ports are recommended in both
supply and return lines for system flow balancing.
Water flow can be accurately set by measuring the
refrigerant to water heat exchangers water side pressure
drop. See Table 9 for water flow and pressure drop
information.
TABLE 9
Q
W
3
6
, 1
Q
3
0
2
Q
W
4
F
. t
H
. d
P
S
G I
-
- -
-
- -
2
3 .
1
-
- -
3
3 .
0
1
8 .
0
4
2 .
9
3
2 .
8
5
3 .
1
4
7 .
7
6
3 .
0
6
2 .
6
-
- -
7
7 .
5
-
- -
9
2 .
4
-
- -
-
- -
-
- -
-
- -
-
- -
-
- -
CAUTION
W
4
2
, 1
8
1
Q
W
6
0
1
F
. t
H
. d
P
S
G I
F
-
- -
-
- -
-
- -
-
- -
4
1 .
5
-
- -
7
5 .
7
-
- -
1
1
0 .
1
-
- -
1
4
4 .
6
3
3 .
0
1
7
9 .
0
4
3 .
0
2
1
3 .
4
5
0 .
0
-
- -
6
0 .
0
-
- -
7
0 .
0
-
- -
8
2 .
0
. t
H
. d
-
- -
-
- -
-
- -
-
- -
-
- -
7
6 .
3
9
9 .
4
1
1
5 .
5
1
3
8 .
6
1
6
1 .
7
1
8
9 .
5
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