Hitecsa EQPL-B 4360 Manual Del Operador página 73

The 2-pipe+DHW systems provide summer mode with the production of chilled water and/or simultaneous or separate production of hot water from the
heat recovery unit. In winter, however, the demand is for hot water production from the main heat exchanger and alternatively (assigning appropriate
priority) from the recovery exchanger.
The unit can run in two modes:
AUTOMATIC: the system allows total recovery of the condensation heat and/or the production of chilled water (summer season). The machine can not
work in this in winter operation mode.
SELECT: this allows the production of hot water to the recovery heat exchanger or from the main one (winter season)
Summer season "AUTOMATIC"
Domestic
Hot water
Competitive advantages
The heat pump unit with total recovery, defined as 2-pipe Polyvalent, fulfils the simultaneous or separate request for hot and cold water with one single
unit, thereby optimising energy consumption and simplifying management in the 2-pipe+DHW systems.
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Its natural application and as a valid alternative in all conventional systems that require a chiller or heat pump with the use or integration of a
boiler.
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The advantages are due to a single unit being used, the economic saving due to the high COP (operating with heat recovery in summer
mode), the non-use of combustible products that are harmful to the ozone so as to be defined as an ecological polyvalent unit.
o
Fourth generation polyvalent versatile heat pump, which unlike other polyvalent units meets the typical demand in 2-pipe systems with a
single unit and in a completely flexible way.
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It is therefore offered on the market as the unit that guarantees fundamental aspects such as EFFICIENCY, RELIABILITY AND
VERSATILITY.
Activation and deactivation of the DS and RC100
The units set up with the DS desuperheater or RC100 total recovery are fitted with the "CR recovery input" digital contact indicated in the wiring diagram
in order to activate thermal recovery. This contact can be controlled, for example, with the KTRD accessory - Thermostat with display.
It is also possible to establish the criterion with which to stop the thermal recovery:
- for digital contact ("CR" - recovery input): if input is interrupted, thermal recovery is also stopped. This mode fulfils the requirement for
temperature control of the tank connected to the recovery unit;
- for maximum temperature (with the exclusion of the heat pumps with RC100 total recovery): in this case the "CR - recovery input" must
always be enabled. The maximum temperature limit to the recovery unit is set from the panel on board the machine (see Manual H57850_F
Electronic controls) or from the remote keypad (KTR accessory). The recovery unit continues to work until the recovery temperature is lower
than the set limit;
- for the temperature set-point (only for heat pumps with RC100 total recovery): in this case the "CR - recovery input" must be enabled. The
temperature set-point to the recovery unit can be set from the set-point menu (see Manual H57850_F Electronic controls, with no user, set-
point menu) on the panel on board the machine or from the remote keypad (KTR accessory). The recovery unit continues to work until the set-
point is reached.
Air Conditioning
Cold water
SECTION II :: INSTALLATION AND MAINTENANCE
74
Winter season "SELECT"
Domestic or Air Conditioning
Hot water