Housekeeping Pad Requirements - Watts AERCO Benchmark BMK750 Installation And Start-Up Manual

Benchmark Platinum-Edge [ii]: Installation Manual
SECTION 2 – INSTALLATION

2.4.3 Housekeeping Pad Requirements

To ensure proper condensate drainage, the unit must be installed on a level concrete
"housekeeping" pad. The unit must be positioned on the pad such that the condensate
assembly is not located over the pad, as shown below.
The minimum thickness of the concrete "housekeeping" pad depends on two factors:
•
Which Benchmark model you're installing
•
Whether the unit will connect to a Condensate Neutralizer tank.
The minimum pad thickness for installations without a Condensate Neutralizer tank are:
•
Benchmark 750 & 1000: 4 to 6 inches (10.2 to 15.2 cm)
•
Benchmark 1500 to 6000: 4 to 8 inches (10.2 to 20.3 cm)
If you are using the AERCO Condensate Neutralizer Tank (P/N 89030), you must ensure
enough height for the condensate to drain into the condensate trap, then into the neutralizer
tank, and then to the drain. This may require that a pit be dug for the Neutralizer Tank. For more
information on the Condensate Neutralizer Tank, see Technical Instructions TID-0074.
The following table specifies the minimum pit depth for the AERCO Condensate Neutralizer
Tank (P/N 89030) if the boiler is installed on a 4" pad, and the pad height if the Neutralizer Tank
must be installed on the floor; note, in all cases a 6" pad eliminates the need to a pit.
BMK Model Minimum Pit Depth
750/1000 Pit not required
1500/2000 1-1/4"
2500/3000
4000/5000N 1-3/4"
5000/6000 Pit not required
Housekeeping
Pad
.
Figure 2-3: Condensate Neutralizer Tank Installation
• GF-210 •
OMM-136_G
Pad Height Without Pit
1"
Trap
Support
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
8/20/2020
4"
5-1/4"
5"
5-3/4"
4"
Condensate
Neutralizer
Page 20 of 62