Heatrae Sadia HI-MAX INSTANT ID 5-60 Installation, Operation And Maintenance Manual page 54

HEAT INTERFACE UNIT COMMISSIONING CHECKLIST INSTALLER PARAMETER SETTINGS
14.1 Accessing the Installer Settings.
To access the installer settings hold the up, down and ON/
OFF buttons in for five seconds as shown in Figure 73.
Figure 73: Heating set up mode
14.2 Navigating through the Installer Settings.
To scroll through the parameter list use the OK button.
The two small digits on the right of the screen under the
fault triangle indicate the parameter number.
14.3 Changing and storing a parameter setting.
To change a parameter value use the up and down arrows
and confirm the setting by pressing the OK button.
14.4 Exiting the Installer Settings.
To exit the installer settings press the ON/OFF button or
leave the controller alone for 5 seconds. Any unstored
setting changes will be lost if they weren't confirmed.
P P arameter
Number
Minimum temperature set point value of the DHW (hot water) settable by the end user.
1
This temperature is measured by the NTC DHW flow sensor in the flow hydroblock.
Maximum temperature set point value of the DHW (hot water) settable by the end user.
2
This temperature is measured by the NTC DHW flow sensor in the flow hydroblock.
Minimum temperature set point value of the heating flow settable by the end user.
3
This temperature is measured by the PT1000 heating flow sensor in the heating flow pipe.
Maximum temperature set point value of the heating flow settable by the end user.
4
This temperature is measured by the PT1000 heating flow sensor in the heating flow pipe.
Activation of the outdoor sensor for weather compensation. PT1000 outdoor sensor must be fitted.
5 True = Weather compensation activated and False = Deactivated.
See separate weather compensation instructions for more details.
Desired ambient room temperature optimum value (circa 20°C).
6
See separate weather compensation instructions for more details.
7 Heating curve offset. See separate weather compensation instructions for more details.
Heating curve slope. Units are in decimal........ 0 : 5,0.
8
See separate weather compensation instructions for more details.
Period in minutes across which time an average of the external temperature is calculated.
9 One reading is taken evey minute over this period.
See separate weather compensation instructions for more details.
Activation of the Heating Otimization function. PT1000 return sensor must be fitted.
10 True = Weather compensation activated and False = Deactivated.
See separate weather compensation instructions for more details.
The Correction Factor that is applied to calculate the Target Flow Temperature Adjustment (TFTA) in order
to achieve the Optimum Return Temperature (ORT).
11 ORT (°C) = Flow Temperature Set Point (°C) - Optimum Temperature Differential (°C)
TFTA (°C) = (Actual Return Temperature (°C) - ORT (°C)) x Correction Factor (%)
Target Flow Temperature = Actual Flow Temperature (°C) - TFTA (°C)
12 Optimum Temperature Differential between the heating flow and the heating return.
13 Time in minutes between readings for calculating and making target flow temperature adjustment.
Pulsed flow start-up delay, in 10 x minutes, between the end of the last demand (either heating or hot water)
14 and the first pulsed flow.
Set parameter 14 to 0 (zero) to disable this function.
Pulsed flow duration time; duirng this time PICV valve is set to its low flow position.
15
Circa 100 litres per hour.
Pulsed flow frequency, in 10 x minutes.
16
Indicates the time between two pulse flow periods, during this phase the PICV is fully closed.
Threshold limit that the Modulating PICV can open in heating mode. The setting refers to the % the valve is
17
closed.
Operative mode for the AUX input:
18 Mode 0: when the input is closed, start DHW supply
Mode 1: when the input is open, the unit is out of credit
Room stat electrical switch (free contact, zero potential) which enables the heating function; Normally Open
19
(NO) contact = TRUE or Normally Closed (NC) contact = FALSE
Used to select the type of control to drive the modulating valve (PICV). For the PICV and Johnson Motor
20
logic is minimum signal (valve fully open) between 0V=0mA (FALSE) or 2V=4mA (TRUE)
21 Temporary service display function
54
C
O
Parameter Description
CAUTION
Only competent persons having received
the appropriate training are permitted to
change any of the settings set in the installer
settings. If in doubt contact:
Technical Enquiries on: 0844 871 1535.
CAUTION
When running underfl oor heating directly
from the HI-MAX INSTANT, it is important
that the Maximum Heating Set Point
Parameter 4 is set to protect the system and
prevent the end user inadvertently adjusting
the set point to a temperature that could
cause damage to their fl ooring or system.

It is important that the Installer Parameter
Settings are logged in the table below. These
instructions and the completed commissioning
checklists (on pages 52-54) should be left with the
unit for future reference and a copy given to the
community heating supplier.

Electronic versions of these checklists are
available, contact 0844 871 1535.
Unit of Default
Measure Setting
°C
°C
°C
°C
0 = False
(0) False
1 = True
°C
°C
1/10
Minutes
0 = False
(1) True
1 = True
%
°C
Minutes
10 x Minutes
Minutes
10 x Minutes
%
0 = False
(0) False
1 = True
0 = False
(1) True
1 = True
0 = False
(1) True
1 = True
0 = False
(0) False
1 = True
Min Max
Installer Settings
Setting Setting
3 3 0 30 65
6 6 5 30 65
2 2 0 30 85
8 8 5 20 95
(0) False (1) True
2 2 0 +10 +30
0 0 -10 +10
8 8 0 50
6 6 0 10 99
(0) False (1) True
5 5 0 1 99
1 1 5 3 40
1 1 0 5 99
2 2 0 99
2 2 1 99
2 2 1 99
6 6 7 0 99
0 1
(0) False (1) True
(0) False (1) True
(0) False (1) True