nb-iosheet

NB Installation, Operation & Maintenance


Overview

 

What is pH?
The pH measurement of a fluid is an indicator of the acidity
or alkalinity. Neutral fluids have pH of 7.0. Acid fluids have pH
below 7. And alkaline fluids have pH above 7 (up to 14). The pH
can be easily measured using litmus paper.
Condensate pH from condensing boilers and furnaces is typically
around 4 (slightly acidic). The condensate pH needs to be
increased (made more neutral) to prevent possible damage to cast
iron soil pipe, ABS pipe, septic tanks, plants, wastewater treatment
plants and other materials handling waste water.

NB-series condensate neutralizing tanks
increase pH (reduce acidity).

NB-series commercial flue-side condensate neutralizing tanks
are designed to raise the pH level of the condensate discharged
by high-efficiency boilers and warm air furnaces.

Each change of 1.0 in pH is a 10-times reduction (or increase)
in concentration. The pH of condensate is increased by approximately
1.0 to 3.0 higher after passing through NB neutralizing
tanks. (This is a change in concentration of from 10 to 30
times.)


Figure 1 NB-series condensate neutralizing tanks — features and dimensions

NB-series condensate neutralizing tanks — features and dimensions.

 

FEATURES
Item
Description
1
Corrosion-resistant neutralizing tank
2
Condensate OUTLET connections, 1¼” NPT male (two locations)
3
Condensate INLET connections, 1¼” NPT male (two locations)
4
Vent connection, ½” NPT female
5
Water level sensor opening — use for mounting of optional AquaGuard senosr probe

 

RATINGS & DIMENSIONS (in inches)
Model
MBH
GPH
A
A2
B
B2
C
D
E
F
G
H
J
K
L
NB-6
6000
60
12
12716
12
12716
12316
278
8
3
218
1012
3
3
34

Applying NB-series neutralizing tanks
Condensate can be collected from flueways and boiler/furnace
condensate trap outlets.

Follow the guidelines in this manual, the boiler/furnace manual
and all applicable local codes when installing, using and maintaining
JM-series condensate neutralizing tubes.

A single NB tank can neutralize condensate from mutliple
boiler/furnace condensate traps, up to the capacity
of the tank.

Match neutralizing tubes to boiler/furnace ratings. Locate the
NB-series neutralizing tank so its OUTLET connection is below
the boiler/furnace condensate connection and slightly above the
floor drain or inlet to a condensate pump (if used).

Follow the guidelines in this manual, the boiler/furnace manual
and all applicable local codes when installing, using and maintaining
NB-series condensate neutralizing tanks.


Installation

 

WARNING
  • Application – Flue gas condensing boilers, furnaces,
    and breeching condensate drains only.
  • DO NOT exhaust flue gases through NB tanks,
    they are not rated for boiler or furnace flue
    gases. Operating NB tanks as exhaust vents can
    cause injury or death from carbon monoxide.
  • NB tanks must be installed below all condensate
    traps, boiler, furnace, and breeching condensate
    drains.
  • JM tubes must be installed below system P-traps, boiler, furnace, and breeching condensate drains.
  • Gas traps must be installed between the boiler, vent drains, and
    furnace condensate outlet and the inlet of all NB tanks.
  • Before operating the boiler or furnace, fill the NB tank and traps
    with tap water.
  • NEVER operate with tubes or P-traps dry.
  • Tubes should be recharged yearly, or when pH level moves below 6.
    Obtain neutralizing agent only from JJM Boiler Works.
  • Failure to comply with these guidelines could result in severe personal
    injury, death or substantial property damage.

 


Figure 2 NB tank application with floor drain, typical


Figure 3 NB tank application with condensate pump, typical

NB tank application with floor drain, typical NB tank application with condensate pump, typical
LEGEND
A
Condensing boiler or furnace
B
Condensate neutralizing tank
C
Boiler/furnace condensate trap connection
D
Boiler/furnace vent
E
Vent condensate trap, when used – Install a trap as shown.
F
Floor drain or sump
G
Condensate pump
H
Bottom of boiler/furnace condensate outlet – MUST be ABOVE
bottom of NB tube condensate outlet
J
Bottom of NB tank condensate outlet
L
Mounting pad or structural platform, when required to elevate boiler
condensate drain as needed
P
PVC pipe – Include unions in the piping to allow removal of the NB
tank for inspection and service. – Secure pipe in place. – Protect
with a shield if necessary if routed through traffic areas.
Q
Secure condensate piping in place with clamps (follow instructions
for securing at condensate pump, when used).
R
Elevate the NB tank on a structural base if necessary for the outlet
to be raised.
S
Route discharge line from condensate pump assembly per instructions
supplied by pump manufacturer.
T
Install ½-inch PVC vent piping to outside from vent tapping on top
of tank where required by codes. (A ½” thread-one-end PVC nipple
is supplied with the optional trim kit.)
U
Install a union at each connection to the NB tank to allow disconnection
for removal and servicing as needed. (Unions are supplied
in the optional trim kit.)
NOTE: Install a 1¼” pipe cap on the unused INLET and
OUTLET tank connections. (Caps are supplied in the
optional trim kit.)
Installation sequence
1.
Before installing boiler or furnace, determine if a mounting pad will
be needed to elevate the boiler or furnace so that the condensate connection
will be above bottom of the NB tank OUTLET. See Figure 2
or Figure 3. Provide a mounting pad for the NB tank if needed to
obtain the proper elevation relative to a condensate pump reservoir
(when used – see Figure 3).
2.
Place the NB tank in position. Fill the tank to the maximum fill line
with neutralizing agent obtained from JJM Boiler Works only.
3.
Connect PVC piping from appliance or breeching drains to P-traps
and then from P-trap outlets to either one of the two NB tank
inlets.
4.
Connect the NB tank outlet to house drain or condensate pump.
5.
Use Teflon tape on all threaded plastic fittings.
6.
NOTE — Always consult the local authority regarding any requirements
concerning flue gas condensate handling codes.

Optional trim kit

Contents

1. JJM offers an optional trim kit, consisting of the following
items:
2. (2) 1¼” NPT pipe caps — install on unused INLET and
OUTLET connections on the tank.

3. (2) 1¼” socket-joint PVC unions – install on the INLET
and OUTLET piping. These are required so the tank can be
disconnected from the piping for access and service.
4. (1) ½” NPT one end nipple – install in VENT connection
on the top of the NB tank. Install ½” PVC piping to outside
when required by local codes.
5. (1) ½” socket-joint PVC union – install in VENT piping.
This is required so the piping can be disconnected from the
tank for removal of the tank lid.

 

Optional AquaGuard overflow
sensor installation

Mount the sensor

1. Insert the AquaGuard 1. sensor probe into the 1-inch hole in
the top rear of the NB tank.
2. Secure the probe in place with the ½” conduit nut supplied
with the kit.

Secure the AquaGuard control box to the
NB tank

1. Remove the tape backing from the back of the unit.
2. Press the control box into position on the tank, NO FURTHER
than 4 inches from the sensor.
3. Wire the sensor to the box by mating the sensor wire to the
connecting wiring from the control box.

Wiring to the boiler or furnace
1. The two red leads of the AquaGuard control must be wired
into a boiler/furnace automatic reset limit circuit to shut
down the boiler/furnace if condensate level rises too high
in the NB tank.
2. The circuit MUST be 24-volt only, NOT line voltage.
3. The black wire from the AquaGuard must be connected to
the 24-volt common terminal of the control.
4. Contact JJM Boiler Works for suggested wiring of the boiler
or furnace being used.

 

Maintenance

 

Inspect frequently
Installer – Instruct the building owner to frequently inspect the
NB neutrazlier and all condensate connections. The owner must
notify a qualified technician if any problems are noticed.

Replace neutralizing agent annually
Installer – Have the building owner schedule an annual recharge
of the NB neutralizer.
USE ONLY neutralizing agent obtained from JJM Boiler
Works.
DO NOT fill higher than the maximum fill line (bottom of tank
OUTLET connection).
Replacement parts
Contact JJM Boiler Works for replacement parts or neutralizing
agent.

 

WARNING
  • Before operating the boiler or
    furnace, fill the NB neutralizer
    tank and all condensate traps
    with tap water.
  • NEVER operate with neutralizer
    tanks or P-traps dry.
  • Neutralizers should be recharged
    yearly (every 2,000 operating hours),
    or when pH level moves below 6.
  • Failure to comply with these guidelines
    could result in severe personal
    injury, death or substantial property
    damage.

PDF version: NB Series Installation, Operation & Maintenance Manual (721k)