Benchmark Platinum-Edge [ii]: Installation Manual
SECTION 2
– INSTALLATION
OMM-
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2.6 SUPPLY AND RETURN PIPING
When connecting the hot water outlet and cold-water inlet to building piping, first make sure the
mating surfaces are thoroughly clean. Gaskets of appropriate size for the pipe flange must be
provided in the field.
2.6.1 BMK750
–
1000 Supply and Return Piping
Benchmark 750 and 1000 Boiler utilizes 3” (7.62cm) 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 2-4a.
Figure 2-4a: BMK750/1000 Supply and Return Locations
2.6.2 BMK1500
–
5000N Supply and Return Piping
Benchmark 1500
– 3000 units have the following inlets and outlets:
•
4” (10.2 cm) 150# flange water INLET (supply) and hot water OUTLET (return) piping.
•
One of the following gas inlet pipes:
o
2” (5.08 cm) Natural Gas inlet pipe.
o
1” (2.54 cm) Propane inlet pipe (BMK 1500-2000).
o
2” (5.08 cm) Propane inlet pipe (BMK 2500-3000).
•
8” (20.3 cm) Air Inlet adapter.
Benchmark 4000 and 5000N units have:
•
6” (15.2 CM) 150# flange water INLET (supply) and hot water OUTLET (return) piping.
1” (2.54cm) NATURAL GAS INLET
1/4” ANALYZER
NPT PORT
3” HOT WATER OUTLET
(SUPPLY)
CONDENSATE DRAIN
AIR INLET
3”
PRIMARY
WATER INLET
COOLER
WATER RETURN
DRAIN VALVE
3”
SECONDARY
WATER INLET
WARMER
WATER RETURN
1” (2.54cm) PROPANE INLET
LIFTING
BAR
(Must be
removed)
