Alpha E-Tec Hybrid - Contents/Introduction
CONTENTS
1 Introduction ........................................2
2 Safety symbols and information ........3
3 Technical data ...................................6
4 General boiler information .................7
5 Installation of heat pump ...................15
6 Operating principals ..........................20
7 Smartech control system settings .....21
8 Wiring diagram ..................................35
9 Error codes and fault finding..............36
1 INTRODUCTION
The Alpha E-Tec 33 Hybrid is a hybrid heat pump specifically designed to increase energy efficiency when replacing old
appliances, even on traditional radiator systems. Thanks to its compact size, it represents the ideal solution to easily install a
hybrid generator to replace an old gas boiler, with extremely easy installation and reduced installation time.
Composed of a 4 kW single-phase air/water mono block outdoor unit (with R32 coolant) and an indoor condensing gas boiler
connected hydraulically in series.
A control unit is also supplied as standard, to manage both boiler and heat pump. The smart logic, integrated in the system’s
electronics, is able to determine the most convenient energy source at that moment (heat pump or boiler) and therefore to
choose the source to be activated.
Operation in central heating takes place with the use of a heat pump and boiler, with the option of activating the two units at
the same time.
The complete 'package' consists of the following main components:
Outdoor unit
with mono block heat pump, which mainly includes:
Swing-type rotary compressor with liquid separator, management electronics, lamination valve, finned coil for exchange with
external air (with single fan), external probe for sliding temperature operation, water/coolant gas heat exchanger, 3 bar water safety
valve, water side filter (already mounted inside the system return), anti-vibration feet. The supply also includes a thermostatic
antifreeze valve (which is only triggered in the absence of electricity, as the electronics include an antifreeze function with
activation of the pump and of the boiler if required), isolating valves for flow and return with vacuum breaker valve. The cooling
circuit is hermetically sealed (R32 coolant). Inertial buffer tank only required for systems with water content lower than 20 litres.
Wall-mounted indoor boiler unit
which includes:
•
Total pre-mixing combustion system with steel multigas cylindrical burner, complete with ignition electrode and ionisation
control, double shutter pneumatic gas valve.
•
Gas/water primary heat exchanger with internal coil made of single-pipe Stainless steel, fanned for flue with electronically
variable speed.
•
Condensate disposal including trap and flexible drain hose.
•
Stainless steel water/water secondary heat exchanger for the production of domestic hot water.
•
Hydraulic unit consisting of a 3-way valve, a 7 m modulating pump, a 3 bar safety valve, a flow switch for detecting domestic
hot water withdrawal, an 8 litre expansion vessel with 1.0 bar pre-charge and pressure gauge.
•
System water flow/return and flue sensors.
•
Control panel including: microprocessor P.C.B. with 3 sensor continuous flame modulation (1 DHW and 2 C.H.) with P.I.D.
control, modulation range from 4.3 to 33 kW .
•
Electronic ignition with ionisation control, ignition delay device in central heating mode, anti-freeze protection system (standard
to -5 °C), pump anti-block device function, post-ventilation function, chimney sweep function and pump functioning mode
selection.
•
Solar delay timing function for coupling with solar thermal systems, with the option of connecting a domestic hot water sensor
•
Screed heater function.
•
Self-diagnosis system.
•
IPX5D electrical insulation rating.
•
Sample points for combustion analysis, lower cover for connection group, gas and mains water isolation valves.
Control unit:
To manage boiler and heat pump, optimising the system in the most efficient way. A boiler mounted receiver and gateway unit
with bus connection via a cable between the outdoor and indoor units. Using a separate wireless controller with built in room
thermostat with App connection for smart phone remote user control.
2
