U.S. Boiler Company X-PV Series Installation, Operating And Service Instructions page 41

11
Operation
(continued)
rst (Reset) - Used to reset the boiler from a
hard lockout (as an alternative to momentarily
interrupting power to the control). Pressing the up
key will turn rst momentarily to on. When it goes
back off (typically within one or two seconds), the
control is reset.
F-C (Temperature Units ) - Determines whether
temperature units on the S9361A are displayed in
F or C. Note that this selection only applies to the
temperature displayed on the LED shown in Figure
11.1.
Call for
Example Heat Use of DHW
# From
1 T-T
2 T-T
3 DHW DHW (dh=dh)
Heat
T'stat on
4
DHW
terminals
5 T-T
6 T-T
109838-01 - 5/20
Table 11.7: Examples Of Thermal Purge Operation
Thermal Purge
Settings
Zone Time (Pt)
N/A 2 min.
N/A 2 min.
2 min.
Heat
2 min.
(dh=tt2)
N/A 2 min.
N/A 3 min.
Installation, Operating & Service Manual
X-PV
bAc (Return to Status mode) - Exits adjustment
mode. Any changes made to the parameters
described above are saved, and become
effective, as soon as they are made; bAc only exits
adjustment mode.
Boiler
Temp at
Start Temp Begin
(St) Call
140F 130
140F 150
140F 150
140F 150
145F 150
140 150
Boiler Behavior
• Heating Circulator starts
immediately
• Burner fires immediately
• Heating Circulator starts
immediately
• Burner fires when either:
2 minutes have passed
OR
Temperature falls below 140
• DHW Circulator starts immedi-
ately
• Burner fires immediately
• "DHW" Circulator starts
immediately
• Burner fires when either:
2 minutes have passed
OR
Temperature falls below 140
• Heating Circulator starts
immediately
• Burner fires when either:
2 minutes have passed
OR
Temperature falls below 145
• Heating Circulator starts imme-
diately
• Burner fires when either:
3 minutes have passed
OR
Temperature falls below 140
41