Step 5 - Fill The Chilled Water And Heat Reclaim; Loop; Water System Cleaning; Water Treatment - Carrier 30RB060-390 Installation Instructions Manual

Step 5 — Fill the Chilled Water and Heat
Reclaim Loop
IMPORTANT: Before starting unit, be sure all of the
air has been purged from the system.
The chilled water pump (if equipped) is rated for 150 psig
(1034 kPa) duty. The maximum cooler water-side pressure is
300 psig (2068 kPa). Check the pressure rating for all of the
chilled water devices installed. Do not exceed the lowest pres-
sure rated device.
WATER SYSTEM CLEANING — Proper
cleaning is of vital importance. Excessive particulates in the
water system can cause excessive pump seal wear, reduce or
stop flow, and cause damage of other components.
CAUTION
Failure to properly clean all piping and components of the
chilled water or heat reclaim system before unit start-up
may result in plugging of the heat exchanger, which can
lead to poor performance, nuisance alarms and/or damage
from freezing. Freezing damage caused by an improperly
cleaned system represents abuse and may impair or other-
wise negatively affect the Carrier product warranty.
CAUTION
Do not circulate water through unit without strainers in
place. Failure to use the strainers represents abuse and may
impair or otherwise negatively affect the Carrier product
warranty.
1. Install a temporary bypass around the chiller to avoid
circulating dirty water and particulates into the pump
package and chiller during the flush. Use a temporary
circulating pump during the cleaning process. Also, be
sure that there is capability to fully drain the system after
cleaning. See Fig. 37.
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 aluminum components. Both
detergent-dispersant and alkaline-dispersant cleaning
agents are available.
3. It is recommended to fill the system(s) through a water
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 feeder/transfer pump to mix the solution and fill the
system. Circulate the cleaning system for the length of
time recommended by the cleaning agent manufacturer.
a. After cleaning, drain the cleaning fluid and flush the
system with fresh water.
b. A slight amount of cleaning residue in the system can
help keep the desired, slightly alkaline, water pH of 8
to 9. Avoid a pH greater than 10, since this will
adversely affect pump seal components.
c. A side stream filter is recommended (see Fig. 38)
during the cleaning process. Filter side flow rate
should be enough to filter the entire water volume
every 3 to 4 hours. Change filters as often as neces-
sary during the cleaning process.
d. Remove temporary bypass when cleaning is complete.
A suction guide with an internal strainer is standard on all
30RB units with factory-installed hydronic packages. This
strainer allows removal of particulates from the chilled
water loop. Using the combination valve and the field-installed
isolation valve at the inlet, the strainer can be isolated from the
chilled water loop to be cleaned.
The ComfortLink controls provided have a built-in feature
to remind building owners or operators to clean the strainer at a
pre-set time interval. Properly installed, cleaned and main-
tained systems will rarely need the strainer cleaned after the
initial fill. This time interval is user-configurable.
Ideally, the chilled water loop will be cleaned before the unit
water system
is connected. If the run-in screen is left in the suction guide/
strainer, it is recommended 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 guide/strainer is not removed at
start-up.
NOTE: The suction guide/strainer must be removed after the
first 24 hours of operation.
To set the time for the parameter, go to Time Clock/MCFG/
W.FIL in the scrolling marquee or the handheld Navigator™
display. Values for this item are input in days.
WATER TREATMENT — Fill the fluid loop with water and
a corrosion-resistant inhibitor suitable for the water of the area.
Consult the local water treatment specialist for characteristics
of system water and a recommended inhibitor for the cooler or
heat reclaim fluid loop.
SYSTEM
Fig. 37 — Typical Set Up for Cleaning Process
SIDE
STREAM
FILTER
44
DILUTED
CLEANING
AGENT
TEMPORARY
PUMP
a30-3988ef
SYSTEM
DILUTED
CLEANING
AGENT
TEMPORARY
PUMP
a30-3989ef
Fig. 38 — Cleaning Using a Side Stream Filter
POT FEEDER AND
TRANSFER PUMP
x
30RB UNIT
x
TEMPORARY
BYPASS
TO DRAIN
POT FEEDER AND
TRANSFER PUMP
x
30RB UNIT
x
TEMPORARY
BYPASS
TO DRAIN