Riello GITRE Series - Water-Side Pressure Drop

10
GENERAL INFORMATION
STORAGE CYLINDER GITRÈ 5 B/100
Type of storage cylinder Vitried steel
Storage cylinder layout Vertical
Heat exchanger layout Vertical
Maximum power absorbed 24,9 kW
DHW water temperature setting range 0-70 °C
Storage cylinder capacity 100 l
Coil water capacity 5 l
Coil heat exchange surface area 1,02 m
2
Domestic hot water production (∆T 35°C) (*) 612 l/h
Water draw in 10 minutes with primary buffer tank
at:
48°C 170 l
60°C 230 l
Specic ow rate (EN 13203) 21 l/min
Replenishment time with ∆T 35°C) 10 min
Maximum operating pressure of storage cylinder 6 bar
STORAGE CYLINDER PUMP
Electrical consumption 53 W
EEI Part 3 (**) ≤ 0,20
P L, Avg (***) ≤ 24 W
Minimum pressure at pump suction inlet 0,5 bar
(*) Inlet water temperature 10°C and average outlet water temperature 45°C with coil inlet temperature of 80°C
(**) Energy efciency rating according to regulations 641/2009-622/2012
(***) Approximate average annual electricity consumption according to regulations 641/2009-622/2012
1.7.1 Water-side pressure drop
GITRÈ boilers come without a pump. A pump must therefore be provided as part of the installation.
In order to choose a pump of the right size, bear in mind the boiler’s water-side pressure drop, as shown in the gure below.
0
5
10
15
20
25
30
35
40
45
50
Flow-rate [m³/h]
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0 3,2 3,4 3,6 3,8 4,0
Pressure drop [mbar]
GITRÈ 4
GITRÈ 5 - 5B/100
GITRÈ 6