Mueller Falling Film Chiller
Effective February 12, 2003
Installation and Operation Manual, Part No. 9843514
Revised March 17, 2020
2.14
CLEANING THE SYSTEM
IMPORTANT: The system should be cleaned before the reservoir is filled. This will retard the growth of
algae, which could result in fouling of the distribution pan.
Before filling the reservoir with water, perform the following cleaning procedures:
1. Remove all dirt, paper, and any other debris that accumulated during shipment and installation.
2. Fill the reservoir with 30 to 50 gallons of water and operate the circulating pump with the refrigeration
compressor turned off.
3. Check all liquid solution piping and components for leaks. After confirming that the system has no leaks, drain
the reservoir, and proceed with the outlined cleaning procedure.
4. Fill the reservoir with approximately 50 gallons of 160°F water and 8 pounds of high-quality trisodium
phosphate. (Mix the trisodium phosphate with water before pouring into the reservoir.)
5. Operate the circulating pump for 30 minutes with the refrigeration unit(s) off. During this time, brush the
inside of the reservoir to clean the areas that are not submerged.
6. Drain the wash solution and fill with 30 to 50 gallons of lukewarm rinse water.
7. Operate the circulating pump for 10 minutes while manually rinsing the reservoir walls not submerged.
8. Drain the rinse water and fill the reservoir to within 8" of the top with deionized or distilled water.
IMPORTANT: Do not use standard softened water, as there is an increased possibility of chloride
corrosion to the stainless steel evaporator or remote, secondary plate heat exchanger.
2.15 TEST RUNNING
After the refrigeration and water piping is completed, the flows are set, all the electrical connections are made, both
water temperature sensors are installed, and the system has been cleaned, it is time to test run the system.
Start the circulating pump. After determining the chilled water system is operating properly, start the refrigeration
system(s) and check the setpoints of the refrigeration units, as described in Section 3.
2.16
CHLORINE GAS RUSTING
IMPORTANT: In rare cases, it is possible for chlorine gas to escape from the water as it passes over the
falling film chiller. If this occurs, red rust will begin to form inside the chiller on the areas that are not
constantly wet.
The use and regular maintenance of a charcoal filter on the incoming city water will remove most of the chlorine
from the water before it enters the chiller and help to prevent chlorine gas rust from occurring.
13