Service manual

19
13.2.4 MODE 3: DHW SETPOINT OPERATION
Mode 3 is intended for domestic water heating. The set-point for inlet water control is pre-set to 140°F
and the auto re-set limit is set to 200°F. The inle t set-point can be adjusted, however the limit is fixed. In
addition to the auto reset limit the factory installs a manual re-set limit set to 210°F. The control turns on
the appliance pump and stages the appliance to maintain set-point target temperature at the appliance
inlet temperature. An internal demand is generated from the DHW sensor which could be placed in the
storage tank while the external heat demand is permanently wired or through a timer. Once the DHW tank
is satisfied (internal demand is removed), the control turns off the appliance and operates the appliance
pump based on the purge feature.
13.2.5 MODE 3: SETPOINT OPERATION: VIEW DISPLAY
From the Home display;
1) Press [ITEM] to view the following parameters:
Display
Parameter
Name
Parameter Description
Parameter
Range
Boiler Outlet
Temperature
Real-time Outlet Temperature to Boiler
14 to 266
o
F
(-10 to 130
o
C)
Boiler Inlet
Temperature
Real-time Inlet Temperature to Boiler
14 to 266
o
F
(-10 to 130
o
C)
Boiler Delta
T
Real-time temperature difference
between the outlet sensor and the inlet
sensor.
-99 to 252
o
F
(-72 to 140
o
C)
Tank
Temperature
Real-time Tank Temperature to Boiler
14 to 266
o
F
(-10 to 130
o
C)
Total Run
Time Since
Installation
Monitors the amount of operational
time since the unit was installed. The
first two digits are the number of
thousands of hours and the three digit
display shows the number of hundreds
of hours.
Press simultaneously to reset
the counter
Alternates
between 00 and
999