Burnham Apex APX399 Installation, Operating And Service Instructions page 44

V. 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
44
(continued)
Figure 34: Condensate Trap and Drain Line
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.