AERCO BMK 2.0 LN Dual Fuel Nov 2010 - Manual (Page 14)

INSTALLATION
2-4
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.
FLOAT
THUMB
SCREWS
(4)
3/4 NPT
PORT
INLET
OUTLET
3/4 NPT
PORT
COVER
Figure 2-5
Condensate Trap Cut-Away View
2.7 GAS SUPPLY PIPING
The AERCO Benchmark 2.0LN Gas
Components and Supply Design Guide, GF-
2030LN must be consulted prior to designing or
installing any gas supply piping.
WARNING
NEVER USE MATCHES, CANDLES,
FLAMES OR OTHER SOURCES OF
IGNITION TO CHECK FOR GAS
LEAKS
.
CAUTION
Many soaps used for gas pipe leak
testing are corrosive to metals. There-
fore, piping must be rinsed thoroughly
with clean water after leak checks
have been completed.
NOTE
All gas piping must be arranged so that it
does not interfere with removal of any
covers, inhibit service/maintenance, or
restrict access between the unit and
walls, or another unit.
Benchmark 2.0LN Dual-Fuel units contain two 2
inch gas inlet connections on the rear of the unit
as shown in Figure 2-3.
Prior to installation, all pipes should be de-
burred and internally cleared of any scale, metal
chips or other foreign particles. Do Not install
any flexible connectors or unapproved gas
fittings. Piping must be supported from the floor,
ceiling or walls only and must not be supported
by the unit.
A suitable piping compound, approved for use
with natural gas and/or propane, should be
used. Any excess must be wiped off to prevent
clogging of components.
To avoid unit damage when pressure testing gas
piping, isolate the unit from the gas supply
piping. At no time should the gas pressure
applied to the unit exceed 2 psi. Leak test all
external piping thoroughly using a soap and
water solution or suitable equivalent. The gas
piping used must meet all applicable codes.
2.7.1 Gas Supply Specifications.
The maximum static gas supply pressure to the
unit must not exceed 2 psi. The specifications
for natural gas and propane are as follows:
Natural Gas:
The gas supply pressure to the unit must be
of sufficient capacity to provide 2000 cfh
while maintaining the gas pressure at 8.5"
W.C.
Propane:
The gas supply pressure to the unit must be
of sufficient capacity to provide 800 cfh while
maintaining the gas pressure at 8.5" W.C.
The maximum static pressure to the unit must
not exceed 2 psi. The minimum operating gas
pressure for natural gas and propane is 8.5
inches W.C. for both FM and IRI gas trains when
the unit is firing at maximum input.
2.7.2 Manual Gas Shutoff Valve
A manual shut-off valve must be installed in the
gas supply line upstream of the Boiler as shown
in Figure 2-6. Maximum allowable gas pressure
to the Boiler is 2 psi.