AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 18)

Chapter 2
Benchmark 2.0LN Low NOx Boiler
GF-123
Installation Installation, Operation and Maintenance Manual OMM-0046_0E
Page 18 of 170 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 08/20/12
In multiple unit installations, it is important to plan the position of each unit in advance. Sufficient
space for piping connections and future service/maintenance requirements must also be taken
into consideration. All piping must include ample provisions for expansion.
If installing a Combination Control Panel (CCP) system, it is important to identify the
Combination Mode Boilers in advance and place them in the proper physical location. Refer to
Chapter 5 for information on Combination Mode Boilers.
2.5 SUPPLY AND RETURN PIPING
The Benchmark 2.0LN Boiler utilizes 4” 150# flanges for the water system supply and return
piping connections. The physical location of the supply and return piping connections are on the
rear of the unit as shown in Figure 2-3. Refer to Appendix F, Drawing AP-A-798 for additional
dimensional data.
2" GAS INLET
CONNECTION
BOILER RETURN
4" – 150# FLANGE
CONNECTION
BOILER SUPPLY
4" – 150# FLANGE
CONNECTION
EXHAUST
MANIFOLD
SHELL
DRAIN
VALVE
REAR VIEW
Figure 2-3: Supply and Return Locations
2.6 CONDENSATE DRAIN AND PIPING
The Benchmark 2.0LN Boiler is designed to condense water vapor from the flue products.
Therefore, the installation must have provisions for suitable condensate drainage or collection.
The condensate drain pipe located on the exhaust manifold (Figure 2-4) must be connected to a
condensate trap which is packed separately within the unit’s shipping container.