emmeti EH0618DC, Installation And Use Manual

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1. DESCRIZIONE DEI COMPONENTI
GB GB
WARNINGS
• The minimum water content of the system, circulating in the heat pump, is
higher than 50 liters, in any operating condition.
• The system circuit (s) is always open to guarantee the minimum water flow
through the heat pump during the defrost phase and the activation of the
anti-freeze protection.
• A suitably sized expansion vessel is installed to avoid exceeding the 2.5 bar
limit pressure in any operating condition.
• The electricity supply is not removed during the winter period when there is
the risk of ice formation.
• In addition to the anti-freeze protection present in the machine, it is manda-
tory to provide an adequate additional anti-freeze protection, which inter-
venes in the event of a power failure or in the event of a fault, and which is
kept efficient with appropriate checks during mandatory maintenance.
• Do not use the heat pump to treat industrial process water, swimming pool
water or sanitary water. In all these cases, prepare an intermediate heat
exchanger.
PCB DISPLAY
ON 4
3 2 1
OFF
ON
SW4
SW4
Anti-freeze protection
The heat pump is equipped with an anti-freeze protection function which
prevents the water from freezing by activating the internal circulator when
the external temperature drops below 4 ° C and, if the temperature of the
water leaving the pump of heat drops below 2 ° C, the unit itself is also
started in heating mode. This function is effective as long as there is power
supply to the heat pump and water circulation is guaranteed inside the hy-
draulic circuit. The evidence that this protection is active is obtained with
Dip-Switch 1 = ON as in Fig. below (factory setting).
• If the above conditions are not guaranteed, it is necessary to provide
an additional antifreeze protection, adding the system loading water
with an adequate quantity of glycol, in compliance with the following
table:
% of inhibited propylene
glycol
10% 20% 30% 40%
Freezing Temperature* -4 °C -9°C -15 °C -23 °C
Correction Factors
Capacity 0,996 0,991 0,983 0,974
Absorbed Power 0,990 0,978 0,964 1,008
Loss of Charge 1,003 1,010 1,020 1,033
Note: (*) Note: the temperature values are indicative. Always refer to the
temperatures listed for the specific product.
Water loaded into the system
Do not use corrosive water, containing deposits, chlorine debris or
demineralized water.
To avoid corrosion phenomena of the heat pump exchanger, the precharge
water of the system must comply with the limits indicated in the
following table.
If you are not reasonably certain about the quality of the water or if you
have doubts about the presence of different materials that could cause a
progressive corrosion of the exchanger over time, it is always a good rule
to insert an inspectable intermediate exchanger and made of material
suitable for resisting such components. In the case of new installation or
emptying of the circuit, it is necessary to carry out a preventive cleaning
of the system.
In order to guarantee the correct operation of the product, after each
cleaning operation, water replacement or glycol addition, check that the
precharge water complies with the following table.
• If Dip-Switch 1 = OFF it is essential to activate the antifreeze protec-
tion in the SMART-MT controller as described in chapter 8.13
5. INSTALLATION
For correct operation and protection of the heat pump, it must be guaranteed that:
pH 7.5 ÷ 9.0
SO4-- < 70 ppm
HCO3-/SO4-- > 1.0 ppm
Total hardness 4.0 ÷ 8.5 dH
CI- < 50 ppm
PO43- < 2.0 ppm
NH3 < 0.5 ppm
Fe+++ < 0.2 ppm
Mn++ < 0.05 ppm
CO
2
< 5 ppm
H
2
S < 50 ppb
Temperatur < 65 °C
Oxygen content < 0.1 ppm
Alkalinity (HCO
3
) 70 ÷ 300 ppm
Electric conducibility 10 ÷ 500 μS/cm
Nitrate (NO
3
) < 100 ppm