Burnham ALP150 - Manual (Page 29)

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V. Condensate Disposal
A. Condensate Trap and Drain Line.
1. All condensate, which forms in the boiler or vent
system, collects in the sump under heat exchanger
and leaves the boiler through factory installed
condensate trap.
2. The trap allows condensate to drain from sump
while retaining flue gases in the boiler. The trap
has factory installed overflow switch, which shuts
down the boiler in the event the drain line becomes
obstructed, preventing proper condensate removal.
Refer to Section XIII “Service and Maintenance”
for condensate trap and condensate overflow switch
removal and replacement procedure, if required.
3. Note the following when disposing of the
condensate:
a. Condensate is slightly acidic, typical pH around
3.5 - 4.5. Do not use metallic pipe or fittings in
the condensate drain line. Do not route the drain
line through areas that could be damaged by
leaking condensate.
b. Do not route or terminate the condensate drain
line in arrears subject to freezing temperatures.
c. If the point of condensate disposal is above the
trap, a condensate pump is required to move
the condensate to the drain. Select a condensate
pump approved for use with condensing
furnaces. If overflow from the pump would
result in property damage, select a pump with an
overflow switch. Wire this switch in series with
installer provided external high limit, to shut off
the boiler, and, if desired, in series with installer-
supplied alarm, to trigger an alarm in the event
of overflow.
d. Do not attempt to substitute another trap for one
provided with the boiler.
e. In order for boiler to work properly, the boiler
must be leveled during installation.
4. The condensate trap stub is located at boiler left
side, below inlet and outlet water pipe connections.
Refer to Figures 1A and 1B.
5. Condensate trap must be filled up with water,
prior to boiler start-up and before connecting any
condensate line to the boiler, to insure combustion
products cannot escape from operating boiler. To fill
the trap, inject water in the amount of 1 cup (8 fluid
ounces) through condensate trap stub opening. Do
not overfill the trap.
6. If any additional condensate drain line is needed,
construct the extension from PVC or CPVC
Schedule 40 pipe. The factory supplied ¾” x 5-5/8”
long PVC coupling, located in the Part Carton, must
be used to connect drain line to the condensate trap
stub. Do not over tighten coupling compression nuts
when connecting drain line and condensate trap
stub.
WaRning
Failure to install the condensate trap and
condensate drain in accordance with the above
instructions could cause flue gas to enter the
building, resulting in personal injury or death.
CaUTiOn
Boiler condensate is corrosive. Route
condensate drain line in a manner such
that any condensate leakage will not cause
property damage.
Some jurisdictions may require that
condensate be neutralized prior to disposal.
nOTiCE
Use materials approved by the authority having
jurisdiction.
B. Condensate Neutralizer Installation
1. Some jurisdictions may require that the condensate
be neutralized before being disposed of. Follow
local codes pertaining to condensate disposal.
2. A Condensate Neutralizer Kit (P/N 101867-01)
is available as optional equipment. Follow local
codes and instructions enclosed with the kit for
Condensate Neutralizer installation.
3. Limestone chips will get coated by neutral salts
(product of chemical reaction between limestone
and acidic condensate) and lose neutralizing
effectiveness over time. Therefore, periodic
condensate neutralizer maintenance and limestone
chip replacement must be performed. A pH test or
acid test kits are available from HVAC/plumbing
distributors and should be used to measure
condensate acidity before/after neutralizer thus
indicating a need for service and chip replacement.