LP-719 Rev. 000 Rel. 000 Date 6.25.20
53
Figure 58 - Powering On the Boiler
B. Ignition Procedure
Press the ON/OFF button
on the control panel to power on the
boiler.
The display shows the current operating mode.
Operating Mode
Description
Display
Stand-by
CH request
supply temperature displayed
DHW request
DHW setpoint displayed
Purging Cycle
Central Heating Post Circulation
DHW Circuit Post Circulation
C. Central Heating (CH) Temperature Adjustment
It is possible to adjust the central heating (CH) temperature setpoint
from the home screen by pressing the CH +/- buttons. See Figure
59. The allowable operating range is limited by the Max and Min
Temperature Settings (e.g., Parameters 4.2.5 and 4.2.6) which are
adjustable via the Technical Menu. See P. Technical Menu - Access
and Navigation.
Figure 59 - Central Heating (CH) Temperature Adjustment
NOTE:
When set to AUTO - Automatic Temperature Control (e.g.,
Outdoor Reset), the CH Temperature Setpoint is calculated in
accordance with the type of automatic temperature control
selected. The resulting setpoint can be offset/shifted up or down by
pressing the CH
+/-
buttons from the home screen. See K. Parallel
Shift of Reset Curve.
D. Domestic Hot Water (DHW) Temperature Adjustment
Not Applicable to Non-Combi Models using an Aquastat
It is possible to adjust the domestic hot water (DHW) temperature
setpoint from the home screen by pressing the DHW +/- buttons. See
Figure 60.
The DHW temperature range is 97 - 140
o
F. The previously set value
will flash on the display.
Figure 60 - Domestic Hot Water (DHW) Temperature Adjustment
DANGER
!
Hotter water increases the risk of scald injury.
Scalding may occur within five (5) seconds
at a setting of 140
o
F. Water temperature
over 125
o
F can instantly cause severe burns
or death from scalds. Children, disabled,
and elderly persons are at the highest risk
of being scalded. See instruction manual
before setting temperature at the appliance.
Feel water before bathing or showering.
Approximate Time / Temperature Relationships in Scalds
120
o
F
More than 5 minutes
125
o
F
1 1/2 to 2 minutes
130
o
F
About 30 seconds
135
o
F
About 10 seconds
140
o
F
Less than 5 seconds
145
o
F
Less than 3 seconds
150
o
F
About 1 1/2 seconds
155
o
F
About 1 second
Table 25 - Time and Temperature Relationship in Scalds
WARNING
!
An ASSE 1017 or ASSE 1070 temperature limiting or mixing valve
is recommended in installations servicing disabled or elderly
persons, or children. Mixing valves do not eliminate the risk of
scalding.
To avoid scalding:
•
Set the water heater set point temperature as low as
possible.
•
Feel water before bathing or showering.
•
If thermostatic valves are required, use devices specifically
designed for such purpose. Install these devices in
accordance with instructions provided by the manufacturer.
Failure to install a temperature limiting or mixing valve and follow
these instructions could result in property damage, severe personal
injury, or death due to scalds.
