Instructions

PRESTIGE Solo 175 & 250
Service Parts Instructions
7
13. Remove the combustion chamber insulation
from the heat exchanger and inspect for any
signs of damage or deterioration. Replace
combustion chamber insulation if necessary.
See WARNING on page 13.
14. Install the combustion chamber insulation in
the heat exchanger so that the sight glass and
igniter cutout are orientated correctly.
15. Re-assemble the burner mounting plate
assembly onto the heat exchanger. Ensure the
burner plate gasket and combustion chamber
insulation is in place and not damaged, replace
gasket if necessary.
16. Check combustion chamber insulation alignment
with the burner mounting plate. The combustion
chamber insulation igniter cutout should align
with the opening in the burner mounting plate. If
not properly aligned, remove the burner mount-
ing plate and reposition combustion chamber
insulation.
Misalignment of combustion chamber insulation
can cause unreliable boiler operation.
17. Hand tighten the burner mounting plate nuts to
hold the burner plate in place. Once all mount-
ing nuts are in place, use a wrench to tighten
using an alternating pattern until the gasket is
slightly compressed. See Table 1, page 14 for
torque specifications.
18. Re-assemble the blower onto the burner mounting
plate and reconnect the wiring harness connectors.
Tighten screws envenly. See Table 1, page 14 for
torque specifications.
19. Re-assemble the gas supply connection and
wire harness to the gas valve. Tighten the union
using two wrenches. See Table 1, page 14 for
torque specifications. Open the external manual
gas valve. Check gas piping for any leaks and
repair if necessary.
20. Reinstall top jacket access panel.
21. Place the unit back into service.
Check Flame Signal (MCBA)
1. The flame signal can be read from item E in the
information mode. It should be a min. 3μ Α −DC.
2. Check the igniter for fouling or damaged insu-
lation if a low flame signal is read.
3. Check ground wiring and continuity as a cause
for low flame signal. Replace igniter and/or
ignition cable if conditions are unsatisfactory.
Check Flame Signal (TriMax)
1. The flame signal can be read from the boiler infor-
mation screen. It should be a min. 1μ Α −DC.
NOTICE