AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 15)

CHAPTER 2: INSTALLATION
PR2: 05/09/12 Page 15 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
EXHAUST
MANIFOLD
PARTIAL REAR VIEW
CONDENSATE DRAIN
CONNECTION
BOILER
RETURN
Figure 2-4: Condensate Drain Connection Location
Exhaust Manifold Condensate Drain 2.6.1
The exhaust manifold drain pipe connection shown in Figure 2-4, must be connected to a
condensate drain trap external to the unit.
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).
Refer to Figure 2-5 and install the trap as follows:
1. Install 3/4” NPT nipples in the tapped inlet and outlet of the condensate trap (part no.
24060).
2. Install a third 3/4” NPT nipple in the tapped condensate outlet of the exhaust manifold.
3. Connect the exhaust manifold nipple to the condensate trap inlet using a female union.
4. install a suitable support under the condensate trap and ensure that the trap is level.
5. Connect a length of 1” I.D. polypropylene hose (part no. 91030) to the nipple on the outlet
side of the condensate trap and secure it with a hose clamp.
6. 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 lines must be removable for routine maintenance.