An adequate CH load must be present to dis-
sipate the heat generated during the combus-
tion test. If an adequate CH load is not avail-
able an indirect water heater can be used to
dissipate the heat by creating a DHW call
which will enable the DHW circulator.
6. Press the
RIGHT
button to adjust the firing rate
to 100% (high fire). Hold down the
RIGHT
button to rapidly increase the firing rate.
7. If the combustion levels during high fire are
outside the recommended combustion settings
adjust the THROTTLE SCREW (see Fig. 5)
using a flat-blade screwdriver as follows:
Counter-clockwise adjustment of the THROT-
TLE SCREW at High Fire (100% firing rate):
O2 decreases and CO2 increases
Clockwise adjustment of the THROTTLE
SCREW at High Fire (100% firing rate):
O2 increases and CO2 decreases
8. Once the combustion level is set at high fire,
manually place the boiler into low fire mode by
pressing the
LEFT
button to adjust firing rate
down to 1% (low fire) to verify low fire com-
bustion settings.
9. If the combustion levels (O2 & CO2) during
low fire are outside the recommended combus-
tion settings in Table 2, contact Triangle Tube
Technical Support Department for assistance.
10. Press the
OK
button while the fan icon is high-
lighted to shutdown the burner.
11. Press the
LEFT
or
RIGHT
button to highlight
the home screen icon
to exit the service
mode.
NOTICE
Prestige SOLO 155/175/250 - ACVMax Boilers
Natural to Propane Instructions
5
1
Fig. 5: Combustion Adjustment - Prestige Burner
1. Throttle Screw
2016-1 Prestige ACVMax 250 NG to LP
Revised Date: 2/26/2016
