AERCO BMK 1.5 LN Dual Fuel June 2010 - Manual (Page 61)

MAINTENANCE
7-5
Figure 7-4
Burner Assembly Exploded View
7.7 CONDENSATE DRAIN TRAP
The Benchmark 1.5 Boiler contains a
condensate trap as shown in Chapter 2, Figure
2-5. The trap is located external to the unit and
attached to the drain pipe from the exhaust
manifold. This trap should be inspected and, if
necessary, cleaned to ensure proper operation.
To inspect and clean the trap, proceed as
follows:
1. Disconnect the external condensate trap by
loosening the union pipe connection
between the trap and the exhaust manifold
drain pipe.
2. Remove the connections on the inlet and
outlet sides of the condensate trap shown in
Figure 7-5.
3. Loosen the four (4) thumbscrews securing
the cover on the condensate trap. Remove
the cover.
4. Remove the float from the condensate trap.
5. Remove the orifice gasket from the trap.
6. Thoroughly clean the trap, float and gasket.
Also inspect the drain piping for blockage. If
the trap cannot be thoroughly cleaned,
replace the trap.
7. After the above items have been inspected
and thoroughly cleaned, replace the orifice
gasket and float in the condensate trap and
replace the trap cover.
8. Reassemble all piping and hose connections
to the condensate trap inlet and outlet.
Reconnect trap to exhaust manifold drain.
FLOAT
THUMB
SCREWS
(4)
3/4 NPT
PORT
INLET
OUTLET
3/4 NPT
PORT
COVER
O-RING
GASKET
ORIFICE
GASKET
Figure 7-5
External Condensate Trap
7.8 SHUTTING THE BOILER DOWN FOR
AN EXTENDED PERIOD OF TIME
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.
1. Set ON/OFF switch on the front panel to the
OFF position to shut down the boiler’s
operating controls.
2. Disconnect AC power from the unit.
3. Close the water supply and return valves to
isolate boiler.
4. Close external gas supply valve.
5. Open relief valve to vent water pressure.
7.9 PLACING THE BOILER BACK IN
SERVICE AFTER A PROLONGED
SHUTDOWN
After a prolonged shutdown (one year or more),
the following procedures must be followed:
1. Review installation requirements included in
Chapter 2.
2. Inspect all piping and connections to the
unit.
3. Inspect exhaust vent, air duct (if applicable).
4. Perform initial startup per Chapter 4.
5. Perform safety device testing and scheduled
maintenance procedures per Chapters 6
and 7 of this manual.