Condensate Drain And Piping - Watts AERCO Benchmark OMM-0137 Installation And Start-Up Manual

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

2.8 CONDENSATE DRAIN AND PIPING

The Benchmark Boiler is designed to condense water vapor from the flue products. Therefore,
the installation must have provisions for suitable condensate drainage or collection. See below
for information on the condensate drain and piping for the various models.
The condensate drain port located on the exhaust manifold (see Figure 2-7a and 2-7b, below)
must be connected to the condensate trap (P/N 24441), which is packed separately within the
unit's shipping container. Its inlet and outlet connections contain tapped 3/4" NPT ports.
A sample condensate trap installation is shown in Figure 2-7a and 2-7b. However, the actual
installation details for the trap will vary depending on the available clearances, housekeeping
pad height/dimensions and other prevailing conditions at the site.
NOTE: The following guidelines must be observed to ensure proper condensate drainage:
•
The condensate trap inlet must be level with, or lower than the exhaust manifold drain
port.
•
The base of the condensate trap must be supported to ensure that it is level (horizontal).
•
The trap must be removable for routine maintenance. AERCO recommends that a union
be utilized between the exhaust manifold condensate drain port and the trap inlet port.
•
If the condensate trap does not connect directly to the exhaust manifold condensate drain
port, the pipe between the drain and the trap must be stainless steel or aluminum.
•
The concrete housekeeping pad must not extend under the condensate assembly.
While observing the above guidelines, install the condensate trap as follows:
Condensate Drain Installation Instructions
1. Connect the condensate trap inlet to the exhaust manifold drain connection using the
appropriate piping components (nipples, reducers, elbows, etc.).
2. At the condensate trap outlet, install a 3/4" NPT nipple.
3. Connect a length of 1" (2.54 cm) I.D. polypropylene hose to the trap outlet and secure with a
hose clamp.
4. Route the hose on the trap outlet to a condensate neutralizer tank or nearby floor drain.
WARNING!
Use PVC, stainless steel, aluminum or polypropylene for condensate drain piping. Do NOT
use carbon or copper components.
If a floor drain is not available, a condensate pump can be used to remove the condensate to an
appropriate drain. The maximum condensate flow rate is:
Model Maximum Condensate Flow Per Boiler
BMK750 6 gallons (23 L) per hour
BMK1000 8 gallons (30 L) per hour
BMK1500 9 gallons (34 L) per hour
BMK2000 10 gallons (38 L) per hour
BMK2500 17 gallons (64 L) per hour
• GF-210 •
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BMK3000 20 gallons (76 L) per hour
BMK4000 30 gallons (114 L) per hour
BMK5000N 33 gallons (125 L) per hour
BMK5000 34 gallons (128 L) per hour
BMK6000 40 gallons (151 L) per hour
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