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Relevant variables:
Specific Parameters
(149) De_Air_Config
De_Air_State
Current state of the DAir function.
DAir_Repetition_OnOff
Number of repeating ON/OFF.
DAir_Number_Cycles
Number of DAir cycles.
De-Air sequence duration
The total duration of the De-Air sequence depends on the selected De-Air settings. With the default settings for
De-Air the sequence takes 800 seconds to complete.
De-air for cascade systems
The de-air function is not available for cascaded systems. It is not possible to generate a burn demand for cas-
cade as long as the de-air cycle is busy. When using a cascaded system it is recommended to configure the de-air
function to either 24hr pump or disabled.
Water pressure
The installation should be designed and built to conform to all applicable regulations and standards, including the
right safety relief valves. IMPORTANT: Always keep the pressure in the water heater lower than the value at
which its safety relief valve opens.
Sensor
A water pressure sensor has been built into the water heater. The minimum water pressure in the water heater
is 1.0 bar and the maximum pressure is 8.0 bar. The pressure sensor will stop the water heater from firing when
the water pressure drops below 0.7 bar and starts the water heater firing again when the water pressure reaches
above 1.0 bar. These values should never be changed in the water heater control settings. The water heater can-
not be properly purged of air if the water pressure is less than 1.0 bar.
Flow switch
In order to maintain the water heater warranty a Flowswitch must be fitted onto the return pipework and con-
nected to points 16-17 of the control board. The Flowswitch must be commissioned correctly to ensure the water
heater only fires when full flow at a ΔT of 16.5 has been achieved.
Lochinvar will always quote a suitable Flowswitch item number LM900442P which is suitable for pipework sizes up
to 6" diameter.
The flow switch must only be fitted on a piece of horizontal pipework.
30
Level
(Default) Value
2: Installer
1
1: User
-
1: User
2: Installer
2
2: Installer
3
E93.1804.014
Range
0: 24 hour pump
1: Dair enabled
2: Dair disabled
-
0...255
0...255
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