Heatrae Sadia HI-MAX INSTANT ID 5-60 Installation, Operation And Maintenance Manual page 33


To confi rm the change in setting press the OK
button. Then wait for 3 seconds and the controller
will revert back to the default display.
Figure 38: DHW set point confi rmation
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7.3.2 Heating mode.

The HIU is factory set to operate in optimised
heating mode at 60
temperature can be adjusted between 20
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85 C. Press the OK button to get the screen detailed
in Figure 39. If the AUTO sign isn't shown below
the house symbol, this indicates that the heating is
in manual mode. Use the up and down arrows to
change to AUTO mode and OK to confi rm.
Figure 39: Heating set up mode
AUTO

Press the OK button again to enter the heating set
point set up screen as detailed in Figure 40 below.
Here the current heating set point is shown.
Figure 40: Heating set up mode
AUTO

To change the heating set point temperature use
the up and down buttons until your desired setting
is reached. When setting up the heating set point,
the house symbol in the bottom left hand side of
the screen will fl ash as detailed in Figure 41. To
confi rm the setting press the OK button again.
After confi rming the new setting, leave the buttons
alone for three seconds and the controller will
revert back to the default screen.
Figure 41: Heating set up mode
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AUTO
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O C. The apartment heating fl ow
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O
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O
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7.3.2 Operational check.

To confi rm that the unit is set correctly in hot water
mode simply turn on a hot tap and check with a
thermometer. The controller display will now show
the tap symbol in the bottom right hand corner
and the desired set point in large digits. If district
heat is available, hot water will be delivered to the
taps. Set hot water tap TMVs as necessary.
Figure 42: Display in DHW mode
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
Once the hot water mode has been set up and
checked, turn off the hot water tap(s) and set up
the apartments heating system.

Ensure that the control dial on the pump is set to its
minimum fl ow rate setting (see Figure 43).
Figure 43: Pump control knob setting

Using the programmable room thermostat, switch
the heating on. Refer to the separate programmable
room thermostat instructions for details.

The HIU should now be in heating mode and the
display will now show the house symbol in the
bottom left hand corner and the desired heating
fl ow temperature in large digits and the pump will
illuminate green.
Figure 44: Display in heating mode
AUTO
To optimise the effi ciency of the community heating
system, it is important to keep the district return
temperatures as low as possible. To achieve this the
following set points are recommended:
Hot water System = 55

Heating system (radiators) = 50 - 60

Heating system (Underfl oor) = 32 - 45

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