3
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-5
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A
B
TECHNICAL SPECIFICATIONS
3.5 USE
LIMITS
Heating
Cooling
Source water outlet temperature (°C)
Source water outlet temperature (°C)
Utility w
ater outlet temper
ature (°C)
Utility w
ater outlet temper
ature (°C)
A
With the addition of an adequate quantity of glycol in the source
circuit
GEO HFS 60-80-100
B
With the addition of an adequate quantity of glycol in
the utility circuit
8WLOLW\H[FKDQJHUZDWHUŏRZUDWH
The nominal water flow refers to a temperature difference between input and output of the utility exchanger of 5°C. The maximum permissible
flow rate is the one with a temperature difference of 3°C. Higher values can cause overly high pressure drops.
The minimum permitted water flow is the one with a temperature difference of 8°C.
Insufficient water flow rates can cause abnormal operating temperatures in the cooling circuit resulting in intervention of the safety devices and
the unit stopping.
3.5.2
Utility hot water temperature (winter operation)
Once the system is fully operational, the temperature at the entrance to the utility and/or domestic hot water exchanger must not fall below
30°C; lower values can cause compressor malfunctions with the possibility of breakage.
The maximum outlet water temperature of the utility exchanger must not exceed 65°C from size 06 to 40 and 60°C from 60 to 100. Otherwise
the action of the safety devices stops the unit.
3.5.3
Chilled water temperature (summer operation)
The minimum temperature permitted at the utility heat exchanger outlet is 5°C; it is possible to produce water up to -5°C by adding an adequate
quantity of glycol in the utility circuit. For lower temperatures the unit requires structural changes. In this case, contact our technical department.
The maximum water temperature produced is 18°C.
3.5.4
Source water temperature
The minimum water outlet temperature from the source side exchanger (with glycoled water), in heating mode, is -20°C for sizes from 06 to 40
and -10°C for sizes from 60 to 100.
The appliances, in their standard configuration, are not suitable for installations in a saline environment.
The units are built according to the technical standards and safety rules in force in the European Community. The units
have been exclusively designed for heating, air conditioning and domestic hot water (DHW) production and must be
used for this purpose, compatibly with their performance characteristics. Any contractual or non-contractual liability of
the Company is excluded for damage caused to persons, animals or property, installation errors, adjustment and mainte-
nance or for improper use. All uses not expressly indicated in this manual are not permitted.
In case of operations outside of these values, please contact the Company.
Rev. C 09-2020
MTEC.3810.GB-C-1 Operation and maintenance manual serie WZA English
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