Condensate Drain Trap - Watts AERCO Benchmark OMM-0121 Operation And Maintenance Manual

Benchmark 750-3000 Boiler Operation & Maintenance Manual
SECTION 4 – MAINTENANCE

4.7 CONDENSATE DRAIN TRAP

Benchmark boilers contain a condensate trap (P/N 24441), located external to the unit and
attached to the drain connection from the exhaust manifold at the rear of the unit (shown in
Figure 2-6a and 2-6b of the Benchmark 750 – 3000 Installation and Startup Guide, OMM-0121
(GF-205)). This trap should be inspected and cleaned in accordance with the maintenance
schedule shown in Table 4-1, above, to ensure proper operation.
To inspect and clean the trap, proceed as follows:
Condensate Drain Trap Maintenance Instructions
1. Disconnect the external condensate trap by loosening and then removing connections on
the inlet and outlet sides of the condensate trap (see Figure 4-7).
2. Loosen the four (4) thumbscrews securing the trap's cover and then remove the cover and
the O-ring from under the cover.
3. Remove the float and then thoroughly clean the trap and float. Also inspect the drain piping
for blockage. If the trap cannot be thoroughly cleaned, replace the entire trap (P/N 24441).
4. Replace the float, install the O-ring (P/N 84017), and then replace the trap cover.
5. Reassemble all piping and hose connections to the condensate trap inlet and outlet.
3/4" NPT Port
Thumb
Screw
INLET
O-Rings
(2)
Figure 4-7: External Condensate Trap – Cross-Section & Exploded View
OMM-0122_D • GF-206 • 5/9/2019
THUMB SCREWS (4)
OUTLET
CROSS-SECTION
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
COVER
CONDENSATE
TRAP O-RING
(P/N 84017)
FLOAT
3/4" NPT Port
EXPLODED
VIEW
Page 53 of 164