Cleaning The System; Figure 20 - System Flushing And Cleaning - Johnson Controls VB09 Installation, Operation And Maintenance Manual

FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
10. Continue to bleed the system until the water leav-
ing the drain is clear, no less than 2 hours.
11. Completely drain the piping system.

Cleaning the System

1. After the initial flushing, chemically clean the
system. Repeat the method in Flushing the System
on page 28 to refill the system and circulate the
cleaning solution.
It is recommended to use the services of a pro-
fessional water treatment company for the type of
solution to be used and the duration of the clean-
ing application.
2. Once the cleaning process is complete, shut off
the circulating pump and completely drain the
system.
3. Refill the system with clean water to prepare for
refrigeration chassis connection and system start-
up.
It is recommended that a professional wa-
ter treatment company perform ongoing
maintenance of the water loop including
chemical analysis and flushing, if neces-
sary. The water loop testing should be per-
formed at intervals recommended by the
professional water treatment consultant.
It is recommended that the water loop
testing be performed at least once a year.
Standard practice is once a month or
quarterly.
The customer is responsible for complet-
ing adequate water loop maintenance
over the lifespan of the units. Otherwise,
damage to the units may occur.
Hose or piping
Hose or piping
connecting
connecting supply
supply & return
runouts
and return runouts
Stub-outs to
Stub-outs
to chassis chassis

FIGURE 20 - SYSTEM FLUSHING AND CLEANING

SECTION 1 - INSTALLATION
Supply Return
Supply Return
Riser Riser
Riser Riser
LD19685
29
1