Robur GAHP A indoor, Instructions For Installation, Use And Maintenance Manual

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Features and technical data
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1.6 OPERATION MODE
1.6.1
ON/OFF or modulating operation
The GAHP A unit may operate in two modes:
1. ON/OFF, i.e. on (at full power) or off, with water pump at con-
stant or variable flow.
2. MODULATING, i.e. at variable load from 50% to 100% of heat-
ing capacity, with water pump at variable flow.
For each mode, specific control systems and devices are provid-
ed (Paragraph 1.7 p. 16).
1.7 CONTROLS
1.7.1
Control device
The appliance may only work if it is connected to a control de-
vice, selected from:
1. DDC control
2. CCP/CCI controller
3. external request
1.7.2 Control system (1) with DDC (GAHP unit ON/
OFF)
The DDC controller is able to control appliances, a single GAHP
unit, or even several Robur GAHP/GA/AY units in cascade, only
in ON/OFF mode (non modulating). For more details refer to the
DDC, RB100, RB200 Manuals and the Design Manual.
1.7.3
DDC Controller
The main functions are:
▶
Adjustment and control of one (or more) Robur units of the
absorption line (GAHP, GA, AY).
▶
Data display and parameters setting.
▶
Time programming.
▶
Climatic curve control.
▶
Diagnostics.
▶
Errors reset.
▶
Possibility to interface with a BMS.
DDC functionality may be extended with auxiliary Robur devices
RB100 and RB200 (e.g. service requests, DHW production, third
party generator control, probe control, system valves or circulat-
ing pumps, ...).
1.7.4
Control system (2) with CCP/CCI (modulating
GAHP unit)
The CCP/CCI control is able to control up to 3 GAHP units in mod-
ulating mode (therefore GAHP A/GAHP GS/WS), plus any inte-
gration ON/OFF boiler. For further details and diagrams refer to
the CCP/CCI Manual and the design manual.
1.7.5
CCP/CCI Control
See CCP/CCI device Manual.
1.7.6 Control system (3) with external request (GAHP
unit ON/OFF)
The appliance may also be controlled via generic request de-
vices (e.g. thermostat, timer, switch, contactor...) fitted with
voltage-free NO contact. This system only provides elementary
control (on/off, with fixed set-point temperature), hence without
the important functions of systems (1) and (2). It is advisable to
possibly limit its use to simple applications only and with a sin-
gle appliance.
For connection of the selected device to the appliance's
electronic board please refer to Paragraph 4.4
p. 25.
1.8 TECHNICAL DATA
Table 1.1 GAHP A HT technical data
GAHP A HT Standard GAHP A HT S1
Heating mode
Seasonal space heating energy efficiency class
(ErP)
medium-temperature application (55 °C) - A+
low-temperature application (35 °C) - A+
Heat output for each unit
Outdoor temperature/Water outlet
temperature
A7W35 kW 41,3
A7W50 kW 38,3
A7W65 kW 31,1
A-7W50 kW 32,0
GUE efficiency
Outdoor temperature/Water outlet
temperature
A7W35 % 164
A7W50 % 152
A7W65 % 124
A-7W50 % 127
Heat input
nominal (1013 mbar - 15 °C) (1) kW 25,7
real kW 25,2
Hot water outlet temperature
maximum for heating °C 65
maximum for DHW °C 70
(1) Relative to NCV (net calorific value).
(2) In transient operation, lower temperatures are allowed.
(3) For flows other than nominal see Design Manual, Pressure losses Paragraph.
(4) As an option, a version for operation down to -30 °C is available.
(5) ±10% depending on power voltage and absorption tolerance of electric motors.
(6) PCI (G20) 34,02 MJ/m³ (15 °C - 1013 mbar).
(7) PCI (G25) 29,25 MJ/m³ (15 °C - 1013 mbar).
(8) PCI (G27) 27,89 MJ/m³ (15 °C - 1013 mbar).
(9) PCI (G30/G31) 46,34 MJ/kg (15 °C - 1013 mbar).
(10) Sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614. Data referred to 50 °C outlet temperature.
(11) Maximum sound pressure levels in free field, with directionality factor 2, obtained from the sound power level in compliance with standard EN ISO 9614. Data referred to 50 °C outlet
temperature.
(12) Overall dimensions excluding flue gas exhaust.