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Idiomas disponibles
Idiomas disponibles
EN
-15
-10
-5
T (°C)
Outdoor air temperature (B.S.)
t (°C)
Temperature of the water produced
Standard mode.
Summer operation with condensing control FI15 (standard
on 270-280-290-2100)
Summer operation with partial cooling capacity
Winter operation with partialization of the heat output
In summer mode:
Maximum water inlet temperature 23°C
In winter mode:
Minimun inlet water temperature 20°C
Maximum inlet water temperature 50°C (full load)
ɱ Minimum water pressure 0.5 Barg.
o Maximum water pressure: 10 Barg / 6 Barg with ASP
NOTE
If the inlet temperature to the recovery unit is lower than the permitted val-
ues, it is recommended to use a three-way modulating valve to guarantee
the minimum water temperature required.
Operation with minimum inlet temperatures that are lower than expected,
can compromise functionality and consequent damage to the unit.
Models
270÷2130
Versions
Tmax(1)(3)
Tmax(1)(2)
Tmax = 47°C
Tmax(1)(4)
Tmax = 50°C
1
Evaporator water temperature (IN/OUT) 12/7 °C
2
Maximum outdoor air temperature with unit in standard operation
running on full
3
Maximum outdoor air temperature with unit in silenced mode
4
Maximum outdoor air temperature with unit in partialised cooling
capacity
36
Winter mode
AUTOMATIC 3 / SELECT 1/2
60
55
50
43
T-Q
40
35
30
24
0
5
20
40
270÷2130
X
Tmax = 44°C
Tmax = 47°C
Tmax = 50°C
EQPI3X
I.4.1 Operating limits with the Heat recovery accessory
The EXP unit can be fitted with the DS partial heat recovery unit accessory.
In that case, operating limits are the same as the unit without accessory.
The desuperheater (DS) can be managed according to two modes selecta-
ble from the machine control panel (ECONOMY mode and STANDARD
mode). If the "ECONOMY" mode is selected, the unit will work to optimize
the efficiency of the unit to the detriment in some situations or in ambient
conditions of low air temperature, of the hot water production tempera-
ture and consequently of the time of achievement. of the desired thermal
value. The "STANDARD" mode, on the other hand, foresees the priority in
the production of hot water with possible penalization of the efficiency
of the unit in some situations or in ambient conditions of low air temper-
ature; as a result, the chiller or heat pump will reach the desired tempera-
ture as quickly as possible.
The units come out of the factory with the desuperheater - DS set in the
"ECONOMY" mode. The change of mode can be done by contacting the
HITECSA service.
Produced hot water temperature 45÷70°C (*) with admitted wa-
DS
ter temperature differential 5÷10 K
The minimum inlet water temperature tuc (°C) admitted is equal
to 40°C
NOTE
(*) the production of water above 60 ° C refers to the outdoor air tempera-
ture conditions ≥ 30°C.
The activation of the external pump (supplied by the customer) for the cir-
culation of water in the superheater occurs only if the condensation pres-
sure exceeds a pre-set value (20 bar). For this reason, the delays between
the ignition of the unit and the ignition of the circulation pump of the des-
uperheater that can be observed during operation are completely regular.
Permitted temperature differentials through the heat exchangers
Temperature differential at the main and secondary heat exchangers ΔT =
3 - 8°C for machines with the "Standard" set up. However, consider the min-
imum and maximum flow rates reported in the tables "Water flow rate lim-
its". The maximum and minimum temperature differentials for "Pump" and
"Tank&Pump" set-ups are related to the performance of the pumps, which
must always be checked by means of the HITECSA selection software.
I.4.2 Main and secondary/recovery heat exchanger water
flow rate limits
Type of heat exchanger
270
280
290
2100
2115
S
2130
Plates
Min
m 3 /h
8,0
m 3 /h
9,5
m 3 /h
11,0
m 3 /h
11,0
m 3 /h
14,5
m 3 /h
14,5
Max
20,0
23,0
26,0
26,0
34,0
34,0
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