AERCO RECON 1000 - Manual (Page 92)

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 6 – MAINTENANCE
Page 92 of 178 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0103_0A
PRI: 10/28/2014 Phone: 800-526-0288 GF-147
Cleaning Procedure – Continued
9. HydroSkrub is biodegradable, and in most instances may be purged down sewers. Check
with local authorities before disposing of any complex compositions.
10. Turn off water, shut off the pump and immediately close discharge valves to prevent backflow.
11. Completely drain pump bucket. Disconnect the hoses from equipment and thoroughly rinse
the bucket, pump, and associated hoses used.
6.8.3 Testing HydroSkrub Effectiveness
There are two methods of testing the effectiveness of HydroSkrub during cleaning: the calcium
carbonate spot test of the circulating solution and the charting of a trend in the pH of the cleaning
solution.
6.8.3.1
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
.
6.8.3.2
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 RECON Water Heater contains a condensate trap, as shown in Chapter 2, Figure 2-8 and 2-
9. 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.
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.