28
Installing the System Piping
Before connecting the condensate drain, choose one of the
following disposal options:
a
c
d
b
a. From the boiler directly into an external drain.
Note
Do not install a fixed connection for the drain.
b. From the boiler, through a neutralizing agent, and then
into an external drain (refer to “3.2.1 Light Commercial
Condensate Neutralizer Kit” on page 28).
Note
If you choose this option, the neutralizing agent
must be replaced periodically. Depletion of the
neutralizing agent will vary, based on the usage
rate of the boiler. During the first year of operation,
the neutralizer should be checked every few
months for depletion and replaced as needed.
c. From the boiler into a laundry tub.
Note
The bottom of the boiler must be higher than
the top of the laundry tub to use this option. The
condensate line must have a negative slope to
drain properly.
d. From the boiler into a condensate pump, and then into a
laundry tub.
Note
A pump can be used when there is a long distance
between the boiler and the laundry tub or when
the bottom of the boiler is lower than the top of the
laundry tub.
To connect the condensate drain:
1. Connect a drain line to the
3
/
4
in fitting at the bottom of the
boiler.
Use only corrosion-resistant material for the drain line, such as
PVC or CPVC. Do not reduce the size of this fitting or the drain
line to less than
3
/
4
in.
NPT ¾"
2. Place the free end of the drain line into an appropriate drain.
3. If you are using a condensate pump, ensure that the pump
allows for up to 6 GPH of drainage for each boiler in the
system.
4. If you are not using a condensate pump, ensure that the drain
line is pitched downward at a minimum slope of
1
/
4
in per foot.
3.2.1 Light Commercial Condensate Neutralizer Kit
WARNING
Ɣ
To avoid damaging the appliance, the neutralizer inlet and
discharge must be lower than the condensate drain.
Ɣ
Do NOT allow exhaust flue gases to vent through the
neutralizer. Leakage can cause injury or death from carbon
monoxide.
Ɣ
The connection between the appliance and the neutralizer
must be installed to prevent the backflow of condensate
into the appliance.
Ɣ
Do not connect more than one appliance to the neutralizer.
Summary of Contents for NHB Series
Page 120: ...120 Appendixes 12 6 Component Assembly Diagrams and Part Lists 12 6 1 Case Assembly NFB 301C...
Page 122: ...122 Appendixes 12 6 2 Case Assembly NFB 399C...
Page 124: ...124 Appendixes 12 6 3 Heat Exchanger and Waterway Assembly NFB 301C...
Page 126: ...126 Appendixes 12 6 4 Heat Exchanger and Waterway Assembly NFB 399C...
Page 128: ...128 Appendixes 12 6 5 Combustion Parts Assembly NFB 301C...
Page 131: ...131 Appendixes 12 6 6 Combustion Parts Assembly NFB 399C...
Page 134: ...Memo...