Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
3.4 Pumped liquid requirements
The UPS pump is intended for use
Caution
with water only.
The pump can be used to circulate:
•
Potable hot water
•
Water for hydronic heating
•
Water/glycol mixtures up to 50/50
•
Cooling water
In domestic hot-water systems it is advisable to
use bronze pumps (UPS model) only for water
with a degree of hardness lower than 14 grains
per gallon of hardness. For water with a higher
degree of hardness, a direct-coupled Grundfos
TP pump is recommended.
If the pump is installed in a heating system, the
water should meet the requirements of accepted
standards on water quality in heating systems.
In water/glycol mixtures, in order to prevent the
glycol from degrading, temperatures above
those for which the fluid is rated should be
avoided and time spent at high temperatures
minimized.
It is also important that the system is cleaned
and flushed prior to the installation of the glycol
mixture.
In order to avoid problems with corrosion or
precipitation, the glycol fluids should be checked
and maintained regularly. If further dilution of the
supplied glycol is required, follow the
requirements of the supplier of the glycol.
WARNING
Glycol with the trade name
®
DEXCOOL
can harm the pump.
®
DEXCOOL
is a registered trademark of
General Motors Corporation, used under license
by Texaco Lubricants NA.
The pump is lubricated and cooled by the liquid
being pumped. Therefore, the pumped liquid
must always be allowed to circulate through the
pump. Extended periods without circulation will
cause premature wear to the bearings and
excessive motor heat. The pumped liquid must
also meet the following requirements:
Minimum pump inlet pressure
(during operation)
At these liquid temperatures
UPS
model
167 °F/75 °C 194 °F/90 °C 230 °F/110 °C
[psi]
hf
32-40/4
0.7
1.6
32-80/2
0.7
1.6
32-160/2
11.6
26.8
40-40/4
0.7
1.6
40-80/4
0.7
1.6
40-80/2
6.5
15.0
40-160/2
5.1
11.8
40-240/2
11.6
26.8
50-40/4
0.7
1.6
50-80/4
0.7
1.6
50-80/2
4.4
10.2
50-160/2
11.6
26.8
50-240/2
10.2
23.6
53-55/57
4.4
10.2
75-69
11.6
26.8
80-40/4
11.6
26.8
80-80/4
14.5
33.5
80-160/2
21.8
50.4
100-40/4
27.6
63.8
Liquid temperature range
Continuously:
14 °F (-10 °C) up to 230 °F (110 °C).
Intermittent:
< 284 °F (140 °C) for short periods of time.
Domestic hot water:
< 140 °F (60 °C).
[psi]
hf
[psi]
hf
2.2
5.1
21.0
48.5
5.1
11.8
23.9
55.2
16.0
37.0
34.1
78.8
4.4
10.2
23.2
53.6
1.5
3.5
18.1
41.8
10.9
25.2
29.0
67.0
9.4
21.7
27.6
63.8
16.0
37.0
34.1
78.8
2.9
6.7
21.8
50.4
4.4
10.2
23.2
53.6
8.7
20.1
26.8
61.9
16.0
37.0
34.1
78.8
14.5
33.5
32.6
75.3
8.7
20.1
26.8
61.9
16
37
34.1
78.8
16.0
37.0
34.1
78.8
18.9
43.7
37.0
85.5
26.1
60.3
43.5
100.5
31.9
73.7
50.0
115.5
5
Publicité
Table des Matières
Dépannage
