AERCO BMK 1.5 LN Dual Fuel Jan 2009 - Manual (Page 56)

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