M-thermal technical manual – part 3
1.2 Powering up the indoor unit
When power supply to the indoor unit is turned on, “0” is displayed on the user interface during
its initialization, which might take up to 30 seconds. During this process the user interface cannot
be operated.
2 Setting the pump speed
The pump speed can be selected on the pump.
The default setting is high speed. If the water flow in the system is too high (e.g., noise of running
water in the installation) the speed can be set to low speed.
Note: The speed dial on the pump indicates 3 speed setting.
The available external static pressure (ESP, expressed in mmH
2
O) in function of the water flow
(l/min) is shown in the previous section.
CAUTION:
If the external pressure loss of the water circuit is too high, it is necessary to install an auxiliary
pump. Fail to install an auxiliary pump will result in cooling/heating capacity reduction.
3 Field Settings
The indoor unit should be configured by the installer to match the installation environment
(outdoor climate, installed options, etc.) and user demand. These field settings are accessible and
programmable through the user interface on the indoor unit.
Each field setting is assigned a 4-digit number or code, for example, “3-1-15”, which is indicated
on the user interface display. The first digit “3” indicates the “first code” or field setting group.
The second digit indicates the second code. The last 2-digit number “15” indicate the value of
code “3-1”.
A list of all field settings and default values is given under “Field settings table” . In this same list,
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