Potterton Envoy Flowsure, Installation & Service Instructions Manual

Page: 19 / 39

Publication No. 55977
Boiler Display & Controls
19
4. Boiler Display & Controls – Page 19
0 0
Status
Reset
34
H
b a r
Central Heating
Switch
Domestic Hot Water
Switch
Plus Button
Minus Button
Flow Temperature
& Settings Display
Lockout Reset /
Function Button
Status / Function
Display
System Pressure
Gauge
E
N
0
0
1
2
Boiler Controls
All boiler mounted user controls are situated in the front of
the boiler control box behind the hinged door.
Central Heating Switch : In the 'On' position the central
heating (CH) will be on unless connected to a timer when it
will operate on the timed settings.
Domestic Hot Water Switch : In the 'On' position, the
domestic hot water (DHW) will be available on demand.
Domestic hot water always takes priority over central
heating.
Flow Temperature & Settings Display : This shows the
boiler flow temperature under normal operation and error
condition numbers if a fault should occur.
Status Function Display : This shows the boiler operating
condition under normal operation and an error condition
letter if a fault should occur.
Under normal conditions of operation the following
characters appear:-
Display not illuminated. All power off.
Stand-by : This is displayed when the CH & DHW
switches are in the 'Off' position. Also shown when both
switches are in the 'On' position but there is no call for
heat.
The boiler flow temperature will be shown on the Flow
Temperature & Settings Display.
Central Heating : This is displayed with a flashing dot
when the CH switch is in the 'On' position (and there is a
call for heat from the time control, if fitted). When the
burner lights the dot will stop flashing.
The boiler flow temperature will be shown on the Flow
Temperature & Settings Display.
Temperature Adjustment: The boiler thermostat setting
can be adjusted as follows when in central heating
mode:-
1. Press the Lockout Reset/Function Button once and
the will flash. The Flow Temperature & Setting
Display will change to show the boiler thermostat
setting.
The setting can now be changed in 1°C steps
(between 50°C & 85°C) by pressing the Plus or
Minus buttons.
2. Press the Lockout Reset/Function Button once and
the flashing will change to a flashing this is the
installer adjustment mode entry point (and the
outdoor weather compensator slope adjustment
point if fitted).
3. Outdoor Weather Compensator Slope Adjustment:
(Optional Extra)
As well as the flashing a number between 10 and
30 (default is 20) will be shown on the Flow
Temperature & Settings Display. This feature is used
to optimize the boiler output (flow temperature) to the
heating demand (outside temperature) and takes into
consideration such factors as the standard of
insulation (heat loss) of the building, output of the
heating system and the level of comfort required.
Note : This feature only works when an outdoor weather
compensator is connected to the boiler, the display will
remain the same with or without sensor.
4. Press the Lockout Reset/Function Button once and
the flashing will change to an .