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The contents of the engineer parameters pages are explained below in Table 8.
Text
Default value
Description
Fuel Alarm
(mins)
60 mins
This is the amount of appliance firing time in minutes allowed after a low fuel
level has been alerted in order to prevent the appliance from running out of
pellets in the auger feed mechanism.
Pump diff.
5.0°C
This sets the target difference between flow and return temperatures within the
appliance.
Increasing this value will decrease the circulating pump flow to promote
greater heat transfer to the property.
Decreasing this value will increase the circulating pump flow to promote less
heat transfer to the property.
Max pump
Speed
100.0%
This is the maximum allowable pump speed. The value may be decreased
when the appliance is used on an open vented system to reduce the risk of
overflowing in the property header tank.
Trigger Temp.
5.0°C
This is the amount below the fl ow temperature setpoint (set in the user
accessible Temperature menu – See Figure 14) before the appliance
considers that a heat demand is present.
Increasing this value will reduce startup frequency of the appliance by
permitting a greater flow temperature decrease after the heat demand has
been met.
Decreasing this value will increase startup frequency of the appliance by
permitting a lower flow temperature decrease after the heating demand has
been met.
I.Lock Temp.
50.0°C
This is the minimum flue gas te mperature that the appliance will consider cool
enough before allowing the combustion door interlock to be opened.
This value should not be increased above 50°C due t o increased risk of high
temperature exposure upon opening the combustion door. The value may be
decreased to allow additional cooling if required prior to opening the
combustion door.
Water press.
N.O.
This refers to the control logic of the low water pressure sensor.
When the appliance is used on sealed pressurised system, set parameter to
N.O.
When the appliance is used on an open vented system, set parameter to N.C.
Mode 1
On.
This setpoint refers to low heat demand installations – please refer to the
WS18 / WP18 technical manual for further details.
Auger Mode
Variable
(Factory Set).
This is the current auger mode that has been set following the performance of
a Preset Drop Test. The mode value should only be adjusted after completing
a Preset Drop Test, (See commissioning step 6).
Disable PL
No.
This allows the low pellet level sensor to be disabled in situations where a
another method is used for monitoring pellet level.
Selecting ‘Yes’ disables the sensor.
Table 8: Description of Engineer Parameters
