Lochinvar ARMOR 151 - 801 - Manual (Page 15)

1
Service
(continued)
15
Service Manual
Tank Minimum Set Point
This setting controls the minimum user set point for the tank
temperature. The installer can adjust this by accessing
parameter D4. The minimum setting is 60°F (16°C) and the
maximum setting is the maximum tank set point (parameter
D5).
Tank Maximum Set Point
This setting controls the maximum user set point for the tank
temperature. The installer can adjust this by accessing
parameter D5. The minimum setting is the minimum tank set
point (parameter D4) and the maximum setting is 185°F (85°C).
E: 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 parameter E2. This parameter can be
changed by the installer by accessing parameter E1. The time
range for this parameter is 0 minutes to 10 minutes. The default
value is 1 minute.
Anti-Cycling Override Differential
The control will bypass the anti-cycling time if the water
temperature drops too quickly. The control will use the water
temperature the water heater was at when it shut off as the
starting point. If the 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 parameter E2. The temperature range of this
parameter is 0°F (0°C) to 54°F (30°C). The default value is 10°F
(6°C).
B: Data Logging
Reset last 10 errors
The reset last 10 errors function clears the last 10 errors log.
C: 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 either maximum firing rate or
minimum 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 parameter C1. The time range of this
parameter is 0 to 30 minutes. The default value is 20 minutes.
D: DHW Settings
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 (parameter D3), and
finishes the call for heat when the tank temperature reaches tank
set point. This parameter can be changed by the installer by
accessing parameter D1. The temperature range of this
parameter is 68°F (20°C) to 190°F (88°C). 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 parameter D2.
Tank Set Point Differential
When a tank sensor is installed, the tank temperature must drop
this amount below the tank set point (parameter D1) before the
heater will turn on. The installer can adjust this setting by
accessing parameter D3. The minimum setting is 0° (0°C), and
the maximum is 40°F (22°C). The default setting is 6
°F (3°C).