Page 10
INSTALLATION
Model Selection
The suggested model sizes shown in the table
opposite are based on a typical daily hot water
usage and on the assumption that the heat
pump will heat the domestic hot water to about
50°C. For higher specification, an increase of one
model size should be considered.
When sizing the hot water cylinder, please use
MCS guidelines in MIS3005 and also refer to BS
EN 806:1-5 AND BS EN 8558.
Aquarea Duo cylinder/Heat Pump Selection Guide
The table above can be used to match heat pumps to heat pump cylinders.
To use, first obtain the maximum flow rate from the heat pump manufacture’s
instructions, match this to the flow rates in section 1 and follow this flow rate’s column
down through the other sections.
Section 2 shows the velocity in the pipe work of different diameters at this flow rate. A
maximum flow velocity of 1m/s has been chosen to limit flow noise. Use this section to
choose the correct pipe diameter.
Aquarea Duo Cylinder Selection Guide
Number of
bedrooms
Number of bathrooms
and shower rooms
Suggested model size (litres)
1-3
1 bathroom
200
2-3
1 ba
1 shower room
200
2-3
1 ba
2 shower rooms
200
2-4
2 bat
1 shower room
300
2-4
2 bat
2 shower rooms
300
3-5
2 bat
2 shower rooms
300
Aquarea Duo cylinder/Heat Pump Selection Guide
1 - Flow rates in various units for comparison with heat pump manufacturers data
m
3
/h
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
4.25
l/min
8.33 12.50 16.67 20.83 25.00 29.17 33.33 37.50 41.67 45.83 50.00 54.17 58.33 62.50 66.67 70.83
l/sec or kg/s
0.14
0.21
0.28
0.35
0.42
0.49
0.56
0.63
0.69
0.76
0.83
0.90
0.97
1.04
1.11
1.18
2 - Velocity in pipe (limited to 1 m/s maximum) for pipe sizing
m/s in 22mm 0.37
0.55
0.73
0.91
-
-
-
-
-
-
-
-
-
-
-
-
m/s in 28mm 0.23
0.34
0.45
0.56
0.68
0.79
0.90
-
-
-
-
-
-
-
-
-
m/s in 35mm 0.14
0.22
0.29
0.36
0.43
0.51
0.58
0.65
0.72
0.79
0.87
0.94
-
-
-
-
m/s in 42mm 0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
3 - Operating power of heat exchanger suitable for cylinder based on a 5 degree temperature difference
kW @ 5K dt
3-4
4-6
5.5-8 7-10 8-12 10-14 11-16 13-18 14-20 16-22 17-24 18-26 20-28 21-30 23-32 24-34
200HP
-
-
-
-
-
-
-
-
-
300HP
-
-
-
-
-
4 - Pressure loss (bar) for each flow rate above in the available coil combinations
200HP
0.017 0.040 0.074 0.118 0.173 0.239 0.316 0.405 0.505 0.617 0.741 0.877 1.025 1.184 1.356 1.540
300HP
0.008 0.019 0.036 0.058 0.086 0.120 0.160 0.206 0.259 0.318 0.384 0.457 0.536 0.623 0.716 0.816
INSTALLATION
Section 3 shows the maximum operating power
of the coils in the cylinder. Shaded squares show
the range of operating powers suitable for a
cylinder in either of its set ups.
Section 4 shows the pressure loss across the
coils at this flow rate for all cylinders in both
configurations.
