Condensate Piping And Drain - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
TABLE 4-2: MODULEX EXT Minimum/Maximum Flow Rates
BOILER MODEL
Min. flow rate demanded
in gpm ∆T 27°F (15°C)
Min. flow rate demanded
in gpm ∆T 36°F (20°C)
Max flow rate demanded
in gpm ∆T 27°F (15°C)
Max flow rate demanded
in gpm ∆T 36°F (20°C)
The water side resistance curve of the boiler is shown in the diagram in Figure 4-8.
The pump is not an integral part of the boiler. It is recommended to choose a pump with the rate
and delivery head at about 2/3 of its characteristic heating curve.
Figure 4-8: MODULEX EXT Water Side Pressure Losses
NOTE:
The use of a mixing header fitted between the boiler circuit and the system circuit is always
advisable. It becomes INDISPENSABLE if the system requires flow rates superior to the
maximum permitted boiler flow rates, which is to say lower than 27° F (15 K).

4.14 CONDENSATE PIPING AND DRAIN

To avoid condensate collecting inside the combustion exhaust system, the condensate piping
must slope toward the drain at least 3/8 inch per foot (30 mm/m).
Page 36 of 144
09/15/2017
EXT EXT
1530/1500 1912
5 5
4 4
102 128
77 96
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
EXT EXT
2295/2300 2677/2600
5 5
4 4
153 179
115 134
EXT
2295
EXT
EXT
2300
1912
1530
1500
EXT
3060/3000
5
4
205
153
EXT
2677
2600
EXT
3060
3000
OMM-0095_0H
GF-139