Benchmark Platinum-Edge [ii]: Installation Manual
SECTION 2
– INSTALLATION
OMM-
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2.6.2 BMK1500
–
4000 Supply and Return Piping
Benchmark Platinum 1500
– 3000 units have one 4” (10.2 cm) 150# flange for the water INLET
(supply) and on
e 4” (10.2 cm) 150# flange for the hot water OUTLET (return) piping
connections. They also include
an optional second 4” (10.2 cm) 150# flange for the water
INLET, as shown in Figure 2-4b.
Figure 2-4b: BMK1500
– 4000 Supply and Return Locations
Benchmark Platinum 4000 units have the same number and location of inlet, outlet and gas
piping, but they have
6” (15.2 CM) 150# flanges, and the Natural Gas inlet pipe is 3".
CONDENSATE DRAIN
HOT WATER
OUTLET
(SUPPLY)
SECONDARY
WATER INLET
(
WARMER
WATER RETURN)
AIR INLET
PRIMARY
WATER INLET
(
COOLER
WATER
RETURN)
EXHAUST MANIFOLD
BMK1500/2000
BMK2500-3000
2” NATURAL GAS OR
1” PROPANE INLET
