INDIRECT
SPECIFICATION
5
LOGIC HIU
-
Installation & Servicing / Users
2 TECHNICAL SPECIFICATION
OPERATION
Heating
The temperature setting operates on the principle of set point
regulation and can be fixed within application limits.
Heating Set Point: 25 to 75°C
Nom. heating exchanger net output: 15 kW
Secondary circuit: Maximum pressure rating 3 bar Maximum
operating pressure 2.5 bar
Pump: UPM3 Auto L
Pump bypass setting: 0.45 bar
Pressure switch: opening 0.4 bar - closing 0.8 bar
Safety relief valve setting: 3 bar
Safety thermostat: 55˚C ±3
Expansion vessel: 7.5 litre
Optional Under floor heating capability
Heating control circuit is
VOLT FREE
Domestic Hot Water - DHW
The DHW function takes priority over the heating
function controlled by the DHW priority flow switch
(component 10).
Set Point - DHW temperature 42 to 60°C
Domestic hot water: 10 bar
DHW circuit max. flow rate: 18 l/m (0.3 l/s)
Min.flow rate to activate domestic flow sensor: 2.7
l/m ±0.3
Max. Differential pressure on domestic water
modulating valve: Δp 1.65 bar
Min. Differential pressure on domestic water
modulating valve: Δp 0.35 b
ar
Heat exchanger capacity:
Nom. DHW heat exchanger net output: 50 kW -
Logic HIU Indirect 50
Nom. DHW heat exchanger net output: 75 kW -
Logic HIU Indirect 75
Optional Pre heat function
Primary Performance
Maximum working pressure: 16 bar - primary
3 bar - secondary
Maximum temperature: 85°C
Medium: Water
Max. Percentage of glycol 30%
Max. Recommended primary circuit flow rate: 1.2 m³/h
Electrical
Power supply: 230 V (ac)±10% 50 Hz
Power consumption: 80 W
Protection class: IP 40
Actuator: stepper 24 V
Probes: NTC 10 kΩ
Construction
Frame: RAL 9010 sprayed steel
Protective shell cover: PPE
Components: brass BS EN 12165 CW617N
Pipes: stainless steel
Exchanger: brazed stainless steel
LOGIC HIU INDIRECT 75, LOGIC HIU INDIRECT 50