Heatrae Sadia HI-MAX INSTANT ID 5-60 Installation, Operation And Maintenance Manual page 34


For conventional radiator systems with TRVs
it is recommended that the pump operates in its
variable pressure mode. To do this turn the control
dial anti-clockwise to the left. For underfl oor heating
systems it is recommended that the pump is set to
run at a constant speed to do this turn the control dial
clockwise to the right (see Figure 43 on page 33).
If you have been able to calculate the design fl ow rate
and system pressure losses, set the control knob to
the required setting using the pump curves below.
Figure 45: Variable pressure pump curve
p-v (variable)
H/m
6
5
4
3
2
1
0
0 0,5 1,0 1,5
0 0,2 0,4
0 2 4
P /W
1
40
20
0
0 0,5 1,0 1,5
Figure 46: Constant speed pump curve
Constant speed I, II, III
H/m
1
4300 /min
6
5
3400 1 /min
4
3
2390 1 /min
2
1
1
800 /min
0
0 0,5 1,0 1,5
0 0,2 0,4
0 2 4
P /W
1
40
20
0
0 0,5 1,0 1,5
34
p/kPa
Wilo-Yonos PARA RS
15/6, 25/6, 30/6
60
1~230 V - Rp½, Rp 1, Rp 1¼
50
40
30
20
10
0
2,0 2,5 3,0
Q/m³/ h
0,6 0,8 Q/l/s
6 8 10 Q/Igpm
max.
2,0 2,5 3,0 Q/m³/ h
p/kPa
Wilo-Yonos PARA RS
15/6, 25/6, 30/6
60
1~230 V - Rp½, Rp 1, Rp 1¼
50
40
30
20
10
0
2,0 2,5 3,0 Q/m³/ h
0,6 0,8 Q/l/s
6 8 10 Q/Igpm
max.
2,0 2,5 3,0 Q/m³/ h

For radiator systems where the design fl ow rate
and pressure losses are unknown, check the
index radiator(s) for heat when the pump is on
its minimum setting. The index radiator is the
one furthest from the HIU. Increase the pressure
capability of the pump incrementally by turning
the control dial gradually anticlockwise until the
radiator heats up. Then make a note of the pump
setting on the benchmark commissioning report at
the back of these instructions.

If the heating times and room temperatures are
known, set up the programmable room thermostat
and either switch the room thermostat off or leave
in auto mode for the end user.

Using the underfl oor heating programmer, switch
the heating on. Refer to the separate underfl oor
heating instructions for details.

For underfl oor heating systems there will be two
pumps that work in tandem with each other see
Figure 18 on page 16. The HIU pump's role here
is to deliver heat through the underfl oor heating
systems control valve to the underfl oor heating
pump. The underfl oor heating pump then pumps
the heat around the underfl oor heating system.
To set the pump up in the HIU, increase the pump
speed capability of the pump incrementally by
turning the red knob gradually clockwise until the
fl ow manifold heats up. Then make a note of the
pump setting on the benchmark commissioning
report at the back of these instructions.

If the heating times are known, set up the
programmer and room thermostats where fi tted
and either switch the room thermostats off or leave
in auto mode for the end user.

After commissioning you will see three possible
displays as shown below in Figure 47.
Figure 47: Default displays
Heating demand / mode display
C
AUTO
Hot water demand / mode display
C
Standby mode display
O
O
O
Now fi ll in the
benchmark check
sheet for the HIU.