AERCO BMK 2.0 LN for Mass. only - Manual (Page 54)

MAINTENANCE
7-4
7.7 CONDENSATE DRAIN TRAP 7.8 SHUTTING THE BOILER DOWN FOR
AN EXTENDED PERIOD OF TIME
The boiler contains a condensate drain trap
connected to the drain line of the exhaust
manifold (see Figures 2.4 & 2.5). The trap
should be inspected and, if necessary, cleaned
to ensure proper operation. 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 the ON/OFF switch on the front panel to
the OFF position to shut down the boiler’s
operating control.
1. Disconnect the external condensate trap by
loosening the hose clamps between the trap
and the condensate drain connection on the
exhaust manifold of the boiler (Figure 2.5).
2. Disconnect AC power from the unit.
3. Close 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.
3. Loosen the four (4) thumbscrews securing
the cover on the condensate trap. Remove
the cover. 5. Open relief valve to vent water pressure.
4. Remove the float from the condensate trap. 7.9 PLACING THE BOILER BACK IN
SERVICE AFTER A PROLONGED
SHUTDOWN
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.
After a prolonged shutdown (a year or more), the
following procedures must be followed:
1. Review installation requirements as shown
in Chapter 2 7. Check the condensate drain tapped hole in
the exhaust manifold (Figure 2.4) to ensure
it is clear of blockage.
2. Inspect all piping and connection to the unit
8. 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.
3. Inspect exhaust vent, air duct(if applicable)
and
4. Perform initial startup per Chapter 4
9. Reassemble all piping and hose connections
to the condensate trap inlet and outlet.
Reconnect trap to condensate drain
connection on the exhaust manifold.
5. Perform safety device and maintenance
procedures per Chapters 6 and 7 of this
manual.
Figure 7.4
External Condensate Trap