AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 15)

CHAPTER 2: INSTALLATION
PR2: 04/22/13 Page 15 of 160
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
EXHAUST
MANIFOLD
1/2” NPT
CONDENSATE
DRAIN
CONNECTION
HOUSE-
KEEPING
PAD
BOILER
RETURN
Figure 2-4: Condensate Drain Connection Location
Exhaust Manifold Condensate Drain 2.6.1
NOTE
There are two slightly different types of condensate traps
that may be used in your configuration; an older style
without built-in adapter, and a newer style with a built-in
adapter (see Figure 2-5). Installation is the same (1/4”
threads are inside built-in adapter on newer style).
A condensate drain trap (part no. 24060) is shipped loose and must be installed at the rear of
the unit. The trap inlet and outlet contain tapped 3/4” NPT ports. The actual installation details
for the condensate trap will depend on the available clearances, housekeeping pad
height/dimensions and other prevailing conditions at the site. However, the following guidelines
must be observed to ensure proper condensate trap operation:
• The condensate trap inlet (Figure 2-5) must be level with, or lower than the exhaust manifold
drain port.
• The condensate trap must be supported to ensure that its base is level (horizontal).
• The trap must be removable for routine maintenance. AERCO recommends that a union be
utilized between the exhaust manifold condensate drain port and the trap inlet port.
1. While observing the above guidelines, connect the condensate trap inlet to the exhaust
manifold drain connection using the appropriate piping components (nipples, reducers,
elbows, etc.) for the boiler installation site.
2. At the condensate trap outlet, install a 3/4” NPT nipple.
3. Connect a length of 1” I.D polypropylene hose to the trap outlet and secure with a hose
clamp.
4. Route the hose on the trap outlet to a nearby floor drain.
If a floor drain is not available, a condensate pump can be used to remove the condensate to
drain. The maximum condensate flow rate is 20 GPH. The condensate drain trap, associated
fittings and drain line must be removable for routine maintenance.