Lochinvar Power-fin 1701 - Manual (Page 16)

1
Service
16
Service Manual
C: Data logging
Hours running SH
The hours running SH parameter shows the total number of
hours the unit has been in the SH firing position. This
parameter can be viewed by the user and the installer by
accessing parameter C1.
Hours running DHW
The hours running DHW parameter shows the total number of
hours the unit has been in the DHW firing position. This
parameter can be viewed by the user and the installer by
accessing parameter C2.
Ignition attempts
The ignition attempts parameter shows the total number of
times the unit has attempted to fire. This parameter can be
viewed by the user and the installer by accessing parameter C3.
Show last 10 errors
The control will log the 10 most current errors with the date and
time the error occurred. This parameter can be viewed by the
user and the installer by accessing parameter C4.
D: 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 unit 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 D1. The time range of this
parameter is 0 to 40 minutes. The default value is 20 minutes.
Reset last 10 errors
The reset last 10 errors parameter allows the error counter to be
reset to 0. This parameter can only be cleared by the installer by
accessing parameter D2. Once accessed, press the RESET key to
clear the counter.
E: DHW settings
DHW tank set point
When a temperature sensor is installed in the DHW tank, the
DHW tank set point sets the target temperature of the water in
the tank. The user or installer can adjust this set point by
accessing parameter E1. The temperature range of this
parameter is 60°F (15°C) to 190°F (88°C). The default value is
120°F (49°C).
DHW boiler set point (boiler only)
When an indirect DHW call for heat becomes active, the control
will use the DHW boiler set point to determine the firing rate of
the unit based on the actual outlet water temperature. This
parameter can be changed by the installer by accessing
parameter E2. The temperature range of this parameter is 32°F
(0°C) to 261°F (127°C). The default value is 180°F (82°C).
SH/DHW switching time (boiler only)
The SH/DHW switching time parameter sets the length of time
the control will stay in DHW Mode when a space heating (SH)
call has been received. After this time period has expired the
control will revert to SH Mode. If a DHW call is still active the
timer will reset. After the time period has expired the control
will revert back to DHW Mode. This will continue until one of
the demands has been satisfied. This parameter can be changed
by the installer by accessing parameter E3. The time range of
this parameter is 10 minutes to 240 minutes. The default value
is 30 minutes.
F: Outdoor air reset (boiler only)
Outdoor air reset operation
When the outdoor air sensor is installed, the control will
calculate the water temperature set point based on the outdoor
air temperature. As the outdoor air temperature drops the water
temperature set point increases. This feature allows the unit to
be more efficient in periods of mild weather, see FIG. 1-1 on
page 17.
Minimum air temperature
When the outdoor air temperature drops to this point, the water
temperature will be at its maximum setting (FIG. 1-1). The
water temperature will be limited by the user set point. This
parameter can be changed by the installer by accessing
parameter F1. The temperature range of this parameter is -22°F
(-30°C) to 86°F (30°C). The default value is 25°F (-4°C).
Maximum air temperature
When the outdoor air temperature rises to or above this point,
the water temperature will be at its minimum setting (FIG. 1-1).
This parameter can be changed by the installer by accessing
parameter F2. The temperature range of this parameter is -22°F
(-30°C) to 86°F (30°C). The default value is 70°F (21°C).