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I
NSTALLATION WITH SOURCE OPEN CIRCUIT
The source water circuit of a water to water heat pump is generally an open circuit, with sampling from a well or a water reservoir. The
hydraulic source MUST include appropriate safety devices to protect the 3 major problems encountered:
•
Corrosion: generated by the chemical composition of ground water;
•
Clogging: caused by mud and / or suspended organic and inorganic compounds in groundwater;
•
Freezing: caused by too low temperature of the fluid source.
C
HEMICAL CHARACTERISTICS OF SOURCE WATER CIRCUIT
Carbonic acid dissolved
Hydrogen peroxide sulfur
Ammonia
Chloride
Chloride free
Electrical conductivity
Iron
*An excess of these limits due to a blockage of mud in the source heat exchanger and piping.
Warranty does not cover any damage caused by corrosion, clogging and freezing if attributable to lack and / or incorrect
installation of described safety devices
The use of groundwater generally requires approval by the municipality and / or the province. Check with local authorities.
The limit values in the table may cause clogging by mud in the pipes and the heat exchanger.
The maintenance of the quality of ground water is borne by the user and / or maintenance Lochinvar Limited.
The temperature of source groundwater at the inlet of the source heat exchanger in heating mode, must not fall below 7.8 ° C
to avoid freezing problems in the source circuit. The fact is average water cooling of about 3-5 ° C, resulting in temperature of
the fluid outlet from the heat pump, in this case an inlet water temperature less than 7°C is dangerously close to the
temperature of formation of ice.
The temperature of the source groundwater at the inlet of source heat exchanger in heating mode, should never exceed 25 ° C
as this may activate the control devices and safety unit. For applications with temperatures above 25 ° C groundwater
temperature, please contact Lochinvar Limited.
In case of installation in sites with ground water temperatures close to the above it is recommended to test for water
consumption for a minimum period of 36 consecutive hours (to be made, possibly, towards the end of winter season).
Page | 26
(
WATER TO WATER HEAT PUMP
< 5 mg/Kg
(CO
)
2
< 0,05 mg/Kg
(H
S)
2
< 2 mg/Kg
(NH
)
3
< 100 mg/Kg
(Cl)
< 0,5 mg/Kg
(Cl)
>50µS/cm e <600µS/cm
< 0,2 mg/Kg*
(Fe)
)
Gas chloride free
Manganese
Nitrate
Oxygen
Sulphate
Sulfites
pH Value
< 1 mg/Kg
(Cl
)
2
< 0,1 mg/Kg*
(Mn)
< 100 mg/Kg
(NO
)
3
< 2 mg/Kg*
(O
)
2
(SO
)
< 50 mg/Kg
4
2
< 1 mg/Kg
(SO
)
3
6,5 – 9,0
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