HWM-407CH-IOM (09/13)
Page 27
Mix 1 gallon of concentrated liquid ice machine cleaner per 15 gallons of water in a 55 gallon
drum as shown in Figure 14.
Connect the 3/4” ID x 15’ heavy duty hose to the hose bibb on gate valve (3) and return to the
container holding the cleaning solution. Connect the 3/4” ID x 10’ heavy duty hose to the hose
bibb on gate valve (4) and run near to the bottom of the container holding cleaning solution. See
Figure 14.
Start the closed circuit cleaning by ensuring that gate valves (5) and (6) are tightly shut and then
energize the HWM water circulating pump.
Circulate the cleaning solution through the HWM closed circuit for approximately an hour or until
there is no further change in the color of the cleaning solution.
When cleaning process is completed, turn off the water circulating pump and close gate valve
(4). Disconnect hose from hose bibb on gate valve (4) and drain cleaning solution into drum.
Safely dispose of hose.
Slowly open gate valve (6) to flush the heat exchanger water system clear of cleaning solution.
The flushed mixture is routed into the 55 gallon drum. Approximately 20 gallons of water flushed
through the system will ensure cleaning solution has been thoroughly flushed out of the system
and into the drum.
Close gate valve (3) and remove the hose from the hose bibb on gate valve (3), draining
residual water into the drum.
Safely dispose of hose. Close and seal drum and safely dispose of drum containing used
cleaning solution.
Re-open gate valve (5) as appropriate.
Reconnect power to the HWM in the normal operational mode.
Establish a schedule for regular maintenance of the HWM heat exchanger, based on the results
of the first heat exchanger cleaning.
