Ascent Oil
– August 2019
31
HOT WATER MAINTANENCE
Domestic hot water is produced through a brazed plate heat exchanger (BPHE) which is factory installed on the EK1T
and EK1T+ on the top of the boiler. In areas with hard water (typical in wells and city water derived from aquifers), lime
scale can build up on the internal surfaces of the plate heat exchanger and decrease performance and efficiency. The
EK1T and EK1T+ are shipped with a pair of integrated shutoff/drain valves to allow full isolation of the hot water
components of the boiler. Additionally, the drain valves allow clean-in-place (CIP) maintenance. CIP allows all portions of
the domestic hot water equipment to be cleaned with a descaling agent without removing any components from the boiler.
Energy Kinetics recommends using a citric acid descaler such as Hercules HAYMAKER™ for the following reasons:
1. Chemical compatibility with all components and gaskets.
2. NSF 60 rated for potable water.
3. Citric Acid is non-corrosive and biodegradable and is septic and sewer safe. Follow manufacturer instructions for
proper neutralization (if applicable) and disposal.
Procedure:
1. Always follow all safety precautions and good service practices.
2. Close factory installed hot water make-up (A) and fixture supply isolation valves (B).
3. Ensure the quarter-turn drain valves are closed and remove drain hose bib caps (C).
4. Attach cleaning hoses to the drain valves at (C) location. Attach the hose on the supply side of th
e EK1T’s (or
EK1T+’s) hot water system on hot water make-up valve (A), near the flow switch, to a submersible or pond pump.
5. Combine acid and water in ratio recommended on acid descaler bottle (1 quart of acid to 1 gallon of water is typical).
WARNING:
Always add acid to water, and NOT water to acid. Fill the bucket with the required amount of water,
and then add the acid to the water. This minimizes the risk of splashing full strength acid.
6. Open valves (C). Power the submersible or pond pump and circulate cleaning fluid for 20-45 minutes.
7. Adjust mixing valve setting while submersible pump circulates to ensure mixing valve can fully actuate and all
surfaces are cleaned.
8. Fluid will stop reacting when the system is clean, or if all of the cleaner has been consumed.
9. Dispose of cleaner per manufacturer instructions and good practices.
10. Slowly open the hot water make-up shutoff valve (A) to flush any remaining acid from the system out through fixture
supply isolation drain valve (B). Flush to drain for 3-5 minutes.
11. Fully close drain valves (C). Open the hot water make-up (A) and fixture supply isolation valve (B), returning the
system to service.
12. Replace the drain hose bib caps on drain valves (C).
13. Run system and set mixing valve for proper hot water supply temperature.
A
B
C
Mixing Valve
Flow Switch
Recommended Items:
Safety glasses and gloves
(1) Bucket
(2) Washing Machine hoses
(1) Pump with hose connection
(submersible is recommended)
Descaler cleaning fluid
Neutralizer if applicable
Summary of Contents for SYSTEM 2000 Ascent Combi
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