Dhw Settings - Lochinvar 151 - 801 Service Manual

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Service
(continued)
To save any changes and return to the Home Screen, press the
RIGHT SELECT [HOME] key. To return to the Status Screen
without saving the changes, press the LEFT SELECT [EXIT] key.
Display Timeout
This is the time in which the display remains illuminated. The
range is 10 seconds to 10 minutes. The default is 3 minutes.
Data Logging
Reset log errors
The reset log errors function clears the last 10 errors log.
Functions
Service Mode Delay
By pressing the pin button on the front of the display for five
(5) seconds, the control will be placed in Service Mode. This
will override all other heat demands. The Service Mode allows
the installer to set the unit to any firing rate for the purpose of
combustion analysis. The delay sets the length of time the water
heater will stay in the Service Mode if no keys have been pressed
before going back to its original state. This parameter can only
be changed by the installer by accessing the Service Mode Delay
parameter. The time range of this parameter is 1 to 10 minutes.
The default value is 10 minutes.

DHW Settings

DHW Tank Set Point
By installing a tank sensor, the SMART SYSTEM control can
perform the tank thermostat function. The SMART SYSTEM
control automatically detects the presence of this sensor, and
generates a DHW call for heat when the tank temperature
drops below the tank set point differential (Tank Set point
Differential parameter), and finishes the call for heat when the
tank temperature reaches tank set point + offset. This parameter
can be changed by the installer by accessing the DHW Tank Set
point parameter. The temperature range of this parameter tank
minimum set point to tank maximum set point. The default
value is 125°F (52°C).
Tank Set Point Offset
The tank set point offset measures how far the actual temperature
must go above the set point before the call for heat ends (the
water heater will turn off). This parameter can be changed by
the installer by accessing the Tank Set Point Offset parameter.
The temperature range of this parameter is 0°F (0°C) to 10°F
(30°C). The default value is 4°F (6°C).
Tank Set Point Differential
When a tank sensor is installed, the tank temperature must drop
this amount below the tank set point (DHW Tank Set point
parameter) before the water heater turns back on. The installer
can adjust this setting by accessing the Tank Set point Differential
parameter. The minimum setting is 0° (0°C), and the maximum
is 40°F (22°C). The default setting is 6°F (3°C).
Outdoor Armor Water Heater Service Manual
Tank Minimum Set Point
This setting controls the minimum tank set point for the tank
temperature. The installer can adjust this by accessing the Tank
Minimum Set point parameter. The minimum setting is 60°F
(16°C) and the maximum setting is the maximum tank set point
(Tank Maximum Set point parameter). The default value is 60°
(16°C).
Tank Maximum Set Point
This setting controls the maximum tank set point for the tank
temperature. The installer can adjust this by accessing the Tank
Maximum Set point parameter. The minimum setting is the
minimum tank set point (Tank Minimum Set point parameter)
and the maximum setting is 190°F (88°C). The default value is
140°F (60°C).
Anti-Cycling
Anti-Cycling Time
Once a SH demand has been satisfied, a set amount of time must
elapse before the control will respond to a new SH demand. The
control will block the new heat demand and anti-cycling will
be shown in the display until the time has elapsed or the water
temperature drops below the Anti-Cycling Override Differential
parameter. This parameter can be changed by the installer by
accessing the Anti-Cycling Time parameter. The time range for
this parameter is 1 minute to 10 minutes. The default value is
1 minute.
Anti-Cycling Override Differential
The control will bypass the anti-cycling time if the inlet water
temperature drops too much. The control will use the inlet
water temperature the water heater was at when it shut off as
the starting point. If the inlet temperature drops below the
temperature parameter the control will abort anti-cycling and
allow the water heater to fire. This parameter can be changed by
the installer by accessing the Anti-Cycling Override Differential
parameter. The temperature range of this parameter is 0°F (0°C)
to 54°F (30°C). The default value is 10°F (6°C).
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