11
LED LEGEND and TEST/SETTINGS BUTTON
1 TEMP ACTIVE Indicates that the Ascent HydroStat
control is powered and that the temperature function is
active.
2 TEMP HI TEMP Illuminates when the boiler water
temperature reaches the high limit setting. It will remain lit
until the water temperature falls 10°. The Ascent HydroStat
prevents burner operation while this LED is on. See Differen-
tial explanation on page 7.
3 LWCO ACTIVE Indicates that the low water cut-off
(LWCO) function of the Ascent HydroStat is active. When the
control is installed with a Hydrolevel Electro-Well™, this LED
will be on at all times when the control is powered.
4 LWCO LOW WATER Indicates that the boiler is in a
low water condition. The HydroStat control will prevent burner
operation during this condition. If the LOW WATER light is
blinking, the control has been programmed to provide lock-
out protection in the event a low water condition is detected
(see Manual Reset Low Water Cut-Off on page 9). Pressing
the TEST/SETTINGS button will reset the control.
IMPORTANT: The system must be checked by a qualified
heating professional prior to resuming operation.
WARNING: ALLOW THE BOILER TO FULLY COOL
BEFORE ADDING WATER.
5 ECONOMY ACTIVE Indicates that the Thermal Target-
ing function is active and the Ascent HydroStat will reduce
boiler temperature to conserve fuel. The Economy feature
is activated using the ECONOMY dial. (See “How Thermal
Targeting Works” on page 8 for more information).
6 ECONOMY TARGET When the Economy feature is
active, the Ascent HydroStat continually sets target tempera-
tures below the high limit setting to maximize fuel efficiency.
When the boiler water reaches the target temperature, the
LED illuminates and the burner will shut down. The boiler wa-
ter will continue to circulate and heat the house as long as the
thermostat call continues. The LED will stay lit until the boiler
temperature drops below the differential set point at which
point the boiler will be allowed to fire again. See Differential
explanation on page 7.
NOTE: This LED illuminates regularly during normal boiler
operation.
7 TEST/SETTINGS Button
To Test Low Water Cut-Off: Press and hold the Test/Settings
button for 5 seconds. The display will read LCO.
LWCO TEST LCO
The red Low Water light should illuminate and the burner cir-
cuit (B1 and B2) should de-energize. NOTE: The control must
be installed with a Hydrolevel Electro-Well™ for low water
cut-off functionality (see page 2 for more details).
To View Current Settings: Press and release the
Test/Settings Button in short intervals to sequentially display
the following settings:
HIGH LIMIT SETTING HL
H
LOW LIMIT SETTING LL
H
ECONOMY SETTING ECO
H
OPERATING MODE OP1
H
CURRENT TARGET TEMPERATURE ooo
The display will return to boiler temperature (default) if
Test/Settings Button in not pressed for 5 seconds.
SELECTING ADVANCED SETTINGS
The advanced settings can be activated using the red ‘Test/
Reset’ button on the Ascent Hydrostat control. Pressing the
button will cycle through system parameters and eventually
the advance settings options, displayed as options 1, 2, 3 or
4 (‘OP1’, ‘OP2’, ‘OP3’ and ‘OP4’). Pressing and holding the
red button will cause the display to flash so the Option Mode
may be selected. Once the control is flashing, press the red
button to cycle through OP1, OP2, OP3 and OP4 until you
reach the desired setting. Releasing the button for 2 seconds
will select the last option displayed. The control will then
return to the main temperature display.
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