AERCO Innovation (G-14-2265 and above) - Manual (Page 90)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 6 – MAINTENANCE
Page 90 of
206 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
OMM-0078_0L
PRI: 11/25/2014
Phone: 800-526-0288
GF-128
Calcium Carbonate Spot Test
A calcium carbonate spot test is performed by exposing a form of calcium carbonate to the
HydroSkrub solution. Samples of the deposit, a Tums or Rolaids tablet, or bare concrete
can be used. Observe the reaction of the HydroSkrub solution on the calcium carbonate.
Foaming and bubbling indicates the solution is still active. Little or no reaction indicates that
the solution is expended. This test should be performed near the end of the circulating time.
If the solution has been expended, more HydroSkrub will be required to complete the job. If
the solution is still active at the end of the time, all the scale has been dissolved.
pH Trend Charting
The initial pH of the cleaning solution will measure between 1-3 (See pH sheet on
HydroSkrub packaging). To test the effectiveness of the circulating solution as a function of
pH, take readings at regular intervals and chart as a trend. Note that the deposits can
cause a premature jump in the pH. After circulating for approximately 75% of the cycle time,
begin testing the pH at 10-15 minute intervals. Once the solution’s pH reads 6.0-7.0 on
three or more consecutive readings, the solution is expended. If the pH reads below 6.0
after the circulating time, the application is clean.
6.9 CONDENSATE DRAIN TRAP
The Innovation Water Heater contains a condensate trap as shown in Chapter 2, Figure 2-7. The
trap is located external to the unit and attached to the drain connection from the exhaust
manifold. This trap should be inspected and, if necessary, cleaned to ensure proper operation.
Currently, two styles of the condensate traps are in use. Both styles perform the same functions
and contain identical internal floats. However, the older style has a separate inlet adapter and the
newer style contains a built-in adapter. Refer to Figure 6-10. Maintenance tasks for both styles
are almost identical, however the newer style does not require an orifice gasket.
To inspect and clean the trap, proceed as follows:
Condensate Trap Inspection and Cleaning
1. Disconnect the external condensate trap by loosening the union pipe connection between
the trap and the exhaust manifold drain.
2. Remove the connections on the inlet and outlet sides of the condensate trap shown in
Figure 6-10.
3. Loosen the four (4) thumbscrews securing the cover on the condensate trap. Remove the
cover.
4. Remove the float from the condensate trap.
5. For older style condensate traps, remove the orifice gasket shown in Figure 6-10.
6. Thoroughly clean the trap, float and orifice gasket (if so equipped). Also inspect the drain
piping for blockage. If the trap cannot be thoroughly cleaned, replace the trap.
7. After the above items have been thoroughly cleaned and inspected, replace the orifice
gasket (older style only) and the float in the condensate trap and replace the trap cover.
8. Reassemble all piping and hose connections to the condensate trap inlet and outlet.
Reconnect the trap to exhaust manifold drain.