Aerco Benchmark G-00-711, User Manual

Page: 40 / 79

MAINTENANCE
7-4
2. Disconnect and remove the condensate
drain trap assembly from the exhaust
manifold.
3. Disconnect the exhaust vent (flue) from the
exhaust manifold outlet flange.
CAUTION!
The Exhaust Manifold Is Heavy. Do Not
Drop The Exhaust Manifold While
Removing The Mounting Bolts.
4. Remove the three (3) 1/2-13 mounting bolts
from the exhaust manifold (See Fig 7.4).
5. Carefully lower the exhaust manifold and
slide it out the rear of the unit
Figure 7.5
Exhaust Manifold Mounting Bolts
7. Remove and replace the exhaust manifold
gasket.
8. Inspect the fire tubes for any signs of
restriction or carbon build-up. Clean as
necessary
9. Beginning with the exhaust manifold
removed in step 7 of this section reinstall all
the components in the reverse order that
they were removed.
7.8 SHUTTING THE BOILER DOWN FOR
AN EXTENDED PERIOD OF TIME
1. If the boiler is to be taken out of service for
an extended period of time, one year or
more, the following instructions must be
followed.
2. Set switch on front panel to off to shut down
the boiler’s operating control.
3. Turn off main power supply to unit.
4. Close supply and return valves to isolate
boiler.
5. Close external gas supply valve.
6. Open relief valve to vent water pressure.
7.9 PLACING THE BOILER BACK IN
SERVICE AFTER A PROLONGED
SHUTDOWN
1. After a prolonged shutdown, a year or more,
the following procedures must be followed:
2. Review installation requirements as shown
in section 2
3. Inspect all piping and connection to the unit
4. Inspect exhaust vent, air duct(if applicable)
and
5. Gas regulator vent lines at their termination
points. Check that they are clear and free of
debris or pests.
6. Perform initial startup per section 4
7. Perform safety device and maintenance
procedures per sections 6 and 7 of this
manual.
EXHAUST
MANIFOLD
1/2-13 BOLT & WASHER
TYP. (3) PLACES 120 DEG. APART