Armstrong ABH 399 Prosedur Pembersihan - Halaman 2

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Introduction

All high efficiency condensing appliances will require more maintenance (cleaning) than their non-condensing counterparts. Failure

to properly maintain these units may result in damage to the appliance that is not covered under warranty. Failure to follow all of the

instructions contained in this manual may also cause premature product failure that may not be covered under warranty.

Normal descaling can be accomplished in two hours per unit, and (except under the most severe conditions) should not require more

than four hours. DS40 FERNOX is the descaling solution recommended by our stainless steel manufacturer.

When To Clean

In some extreme applications (hard water and/or higher than normal operating temperatures) the heat exchanger may require chemical

cleaning. If you are experiencing E6 lockouts (water heaters only) that cannot be attributed to pump related problems or remedied by

back flushing the heater with city water pressure, chemical cleaning of the heater is likely your maintenance solution.

Additionally, if your heating boiler or water heater is experiencing 'popping', 'banging', or 'knocking' noise and shaking as a result of the

water boiling as it circulates through the heat exchanger and it can not be attributed to the circulating pump, chemical cleaning of the

heat exchanger may be required.

NOTE: If any of these noises are heard, the appliance should not be operated until the cause is identified and resolved.

Chemical cleaning of the heat exchanger should only be done at the direction of Armstrong Hot Water, Inc. Failure to follow the

prescribed cleaning procedure will result in voiding any warranty of the heat exchanger.

DESCALING SOLUTION

DS40 is a highly effective, heat activated descaling solution. It must be heated to

160º - 180ºF to clean efficiently. Follow instructions listed below.

Kit (P/N HEX 61102) includes 3.3 lb. (1.5 kg) container of DS40 and a pack of

neutralizer, which is used to neutralize the used cleaning solution before discard-

ing it. 3.3 lb (1.5 kg) will treat up to 20 gallons of water.

MIX RATIO:

HW79 - HW199 (Micro): 1/3 (~1 lb.) of container per 4 - 5 gallons of hot water

HW199 - HW599 (Duo): 1/2 (~1.6 lb.) of container per 8 - 10 gallons of hot water

Add hot water, agitate until dissolved.

For additional information, consult manual inside box or go to www.fernox.com

Descaling Procedure (Using Ds40 Cleaning Kit)

1. Shut off gas at appliance

2. Shut off water to and from appliance (isolate via ball valves); drain water

NOTE: In some cases, you may want positive isolation of the cleaning solution from the rest of the system. Breaking the

unions on the water lines, removing the nipples and fittings from the manifolds, and then capping the manifold openings will

accomplish isolation. This would be done between steps 2 & 3.

3. Remove the circulation pump from the inlet side of the appliance

4. Where the pump was installed, install flange to hose connection adapter

5. Attach female end of hose to the adapter; the termination end of the hose will go into the acid solution bucket

Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130

Water Side Heat Exchanger Cleaning Procedure

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