Carrier 30XA080-500 specifications A30-4411, A30-4412

Step 4 — Fill the Chilled Water Loop.

IMPORTANT: Before starting unit, be sure all of the air has been purged from the system.

SYSTEM

DILUTED

POT FEEDER AND TRANSFER PUMP

WARNING

In low ambient (below 32 F [0° C]) and/or low leaving fluid temperature applications (below 40 F [4.4° C]), a suit- able antifreeze solution of the proper concentration for the specific operating conditions must be used as the fluid cir- culated through the cooler to prevent freezing and damage to the system. Failure to operate the system with an anti- freeze solution of the proper concentration will void the warranty should damage result from freezing.

The chilled water pump (if equipped) is rated for 150 psig (1034 kPa) duty. The maximum cooler fluidside pressure is 300 psig (2068 kPa). Check the pressure rating for all of the

CLEANING

AGENT

			x
	TEMPORARY				30XA UNIT
	PUMP
			x
				TEMPORARY
a30-4411		TO DRAIN		BYPASS

Fig. 31 — Typical Set Up for Cleaning Process

SYSTEM

chilled water devices installed. Do not exceed the lowest pres-

DILUTED

POT FEEDER AND TRANSFER PUMP

sure rated device.

WATER SYSTEM CLEANING — Proper water system 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.

1. Install a temporary bypass around the chiller to avoid

circulating dirty water and particulates into the pump

SIDE STREAM FILTER

CLEANING

AGENT

	x
TEMPORARY	30XA UNIT
PUMP

x

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. 31.
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 through a water me-
ter. This provides a reference point for the future for loop
volume readings, and it also establishes the correct quan-
tity 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. 32 dur-
	ing 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 necessary during
	the cleaning process.
d.	Remove temporary bypass when cleaning is complete.

A suction guide with an internal strainer is standard on all 30XA 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.

		TEMPORARY
a30-4412		BYPASS
	TO DRAIN

Fig. 32 — Cleaning Using a Side Stream Filter

The Carrier 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 maintained 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 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 removed after 24 hours of operation.

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 handheld Navigator™ display. To set the time for the parameter with the Touch Pilot™ dis- play, go to Main Menu→Service→MAINTCFG→wfilter_c. Values for this item are input in days.

WATER TREATMENT — Fill the fluid loop with water (or brine) 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 fluid loop.

Untreated or improperly treated water may result in corro- sion, scaling, erosion, or algae. The services of a qualified wa- ter treatment specialist should be obtained to develop and mon- itor a treatment program.

CAUTION

Water must be within design flow limits, clean, and treated to ensure proper chiller performance and reduce the poten- tial of tube damage due to corrosion, scaling, erosion, and algae. Carrier assumes no responsibility for chiller damage resulting from untreated or improperly treated water.

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