Cranborne THI 5-25c, Инструкция по установке, наладке и обслуживанию

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- 26 -
OPERATION
4 - DIFFERENT VERSIONS OF THE THI
The standard configuration is for the
connection of:
- one radiator circuit (CC1),
- one under-floor heating circuit
(CC2) via the 2
nd
circuit clip-in kit.
The heating and domestic hot water flow temperatu-
res are set manually with the respective potentiome-
ters (2 and 3) on the boiler control panel.
The regulator (LMU management unit) thus sets the
heating rate required to provide the heating and hot
water settings specified by the user.
The “Function” key (1) switches between the sum-
mer (hot water only) and winter (heating and hot wa-
ter) modes. (The auto function is not accessible in
this case).
Please refer to section 4.6 - page 15 - Chapter II -
TECHNICAL SPECIFICATIONS.
Note: The installation of under-floor heating is not
possible in this configuration.
4.2.1 - Principle
The domestic hot water temperature is set manually
using the potentiometer (3) on the boiler control pa-
nel
The heating flow temperature is calculated automa-
tically by the regulator (LMU management unit), and
determined according to the outside temperature
and the slope of the heating curve. The room tem-
perature can be modified by only + or - 3°C using the
heating temperature potentiometer (2).
The “Function” key (1) switches between the sum-
mer (hot water only) and winter (heating and hot wa-
ter) modes.
Refer to section 4.6 - page 15 - Chapter II - TECH-
NICAL SPECIFICATIONS.
Note:
- An under-floor heating system can be connected
by following the instructions in section 4.2.3 -
page 26.
4.2.2 - Modification of the room temperature
The room temperature setting is pre-set to 20°C on
the LMU management unit, it can be modified if re-
quired:
- Set the heating temperature potentiometer (2) to
the required value,
- The display indicates the correction made by +/-
3°C with respect to the 20°C value,
The correction is recognised by the LMU by lea-
ving the potentiometer on the required position.
4.2.3 - Modification of the heating curve slope
The heating curve slope depends on the characte-
ristics of the building and the size of the heating ins-
tallation.
The slope of the heating curve is pre-set in the fac-
tory to the value 15 for a radiator system and theo-
retically gives an room temperature of 20°C for a
standard installation.
Note: The maximum permitted flow temperature is
limited by TKSmax (line 504, via the QAA73
room sensor).
4.1 - THI basic model (without outside
sensor, without room sensor)
4.2 - THI with outside sensor only
!
auto
Function
2 3
4
1 5
THI-66-0
Fig. 21
S
lope
0
10
20
30
40
50
60
70
80
90
100
20 15 10 5 0 -5 -10 -15 -20
Outside temperature (°C)
B
o
ile
r s
et
point
temp
eratu
re (°
C)
0,2
0,4
0,6
0,8
1
1,2
1,4
1,6
1,8
2
2,4
Fig. 22