Step 4 -- Fill The Chilled Water Loop; Water System Cleaning - Carrier AQUASNAP 30RB060-390 Installation Instructions Manual

il L
Decoupler _
Distribution Pump
Expansion
Tank(s)
Air Separator
with Vent
o
N
CM
NOTE: Expansion tanks for 30RB hydronic kits must be installed for chillers piped in parallel in the primary water loop.
Fig. 25 -- Typical Air Separator and Expansion Tank Location on Primary-Secondary Systems
Step 4 -- Fill the Chilled Water Loop
IMPORTANT: Bet\_re starting unit, be sure all of the ]
air has been purged from the system.
I
The chilled water pump (if equipped) is rated for 150 psig
(1034 kPa) duty. The maxilnum cooler tluidside pressure is
300 psig (2068 kPa). Check the pressure rating tbr all of the
chilled water devices installed. Do not exceed the lowest pres-
sure rated device.
WATER SYSTEM CLEANING Proper water system
cleaning is of vital importance. Excessive particulates in the
water system can cause excessive pump seat wear, reduce or
stop flow, and cause dmnage of other components.
1. Install a telnporary bypass around the chiller to avoid
circulating dirty water and particulates into the pump
package and chiller during the tlush. Use a telnporary
circulating pump during the cleaning process. Also, be
sure that there is capability to fully drain the system after
cleaning. See Fig. 26.
2. Be sure to use a cleaning agent that is compatible with
all system materials. Be especially careful if the system
contains any galvanized or aluminmn components. Both
deteigent-dispersant and alkaline-dispersant cleaning
agents are available.
3. It is recolrnnended to fill the system through a ,a_ater
meter. This provides a reference point for the future for
loop volume readings, and it also establishes the correct
quantity of cleaner needed in order to reach the required
concentration.
4. Use a t}eder/transfer pump to mix the solution and fill the
system. Circulate the cleaning system for the length of
time recolrnnended by the cleaning agent lnanufacturer.
a. After cleaning, drain the cleaning tluid and tlush the
system with fiesh ,a_ater.
b. A sli_lt alnount of cteaning residue in the systeln can
help keep the desired, slightly alkaline, water pH of 8
to 9. Avoid a pH greater than 10, since this will
a&ersely aft}ct pump seat components.
c. A side stream tilter is recolrnnended (see Fig. 27 dur-
ing the cleaning process. Filter side tlow rate should
be enough to tilter the entire water volmne every 3 to
4 houls. Change tilters as often as necessary during
the cleaning process.
d. Relnove temporary bypass when cleaning is complete.
A suction guide with an interual strainer is standard on all
30RB units with factory-installed hydronic packages. This
strainer allows relnoval of particulates from the chilled
water loop. Using the combination vane and the field-installed
isolation valve at the inlet, the strainer can be isolated from the
chilled water loop to be cleaned.
The Ca_cier ComJbrtLink
TM
controls provided have a built-
in feature to relnind building owners or operators to clean the
strainer at a pre-set time interval. Properly installed, cleaned
and maintained systems wilt rarely need the strainer cleaned
after the initial fill. This time interval is user-confi_rable.
Ideally, the chilled ,a_aterloop will be cleaned before the unit
is connected. If the run-in screen is left in the suction guide/
strainei; it is recolrnnended that the Service Maintenance be set
to alert the operator within 24 hours of start-up to be sure that
the run-in screen in the suction _ide/strainer is not iemoved at
start-up.
NOTE: The suction guide/strainer must be relnoved after the
first 24 hours of operation.
To set the time tbr the parameter, go to Time Clock/MCFG/
WTIL in the Scrolling Marquee or the handheld Navigator
TM
display. Values for this item are input in days.
SYSTEM
I POT FEEDER AND
DILUTED TRANSFER PUMP
CLEANING
4-
TEMPORARY ', 130RB UNiT
PUMP ! _
TO DRAIN
Fig. 26 -- Typical Set Up for Cleaning Process
SYSTEMF=_ l---"] POT FEEDERAND
DILUTED TRANSFER PUMP
SIDE r'l V CLEANINGrlr-'fl-
STREAM I I/._FILTER U
I_ AGENT _, X---{
TEMPORARY , 1 30RB UNIT
PUMP _
TO DRAIN
Fig. 27 -- Cleaning Using a Side Stream Filter
32