Carrier 30XW150-400 specifications

Cooler Pump Control — It is required for all chillers that the cooler pump control be utilized unless the chilled water pump runs continuously or the chilled water system contains a suitable concentration of antifreeze solution. When the Cooler Pumps Sequence is configured, the cooler pump output will be energized when the chiller enters an "ON" mode. The cooler pump output is also energized when certain alarms are generat- ed. The cooler pump output should be used as an override to the external pump control if cooler pump control is not utilized. The cooler pump output is energized if a P.01 Water Exchanger Freeze Protection alarm is generated, which provides addition- al freeze protection if the system is not protected with a suitable antifreeze solution.

The 30XW units can be configured for external cooler pump control. Cooler Pumps Sequence is the variable that must be confirmed in the field. Proper configuration of the cooler pump control is required to provide reliable chiller oper- ation. The factory default setting for Cooler Pumps Sequence is 0 (No Pump). The configuration settings for Cooler Pumps Se- quence are 1 (1 pump only) for single pump control and 2 (2 pumps auto). Configuration settings 3 (PMP 1 Manual) and 4 (PMP 2 Manual) are for dual pump control only.

If the Cooler Pumps Sequence (PUMP) is set to 1, the con- trol will start the pump. If a flow failure is detected, the unit will shut down and must be manually reset. If the Cooler Pumps Sequence (PUMP) is set to 2, the control will start the lead pump and automatically alternate the operation of the pumps to even the wear. If a flow failure is detected, the unit will shut down and the lag pump will attempt to start. If flow is established within the Unit Off to On Delay (DELY) period the unit will restart automatically.

Two manual control options are also available. When the Cooler Pumps Sequence (PUMP) is set to 3, Cooler Pump 1 will always operate. If a flow failure is detected, the unit will shut down and must be manually reset. When the Cooler Pumps Sequence (PUMP) is set to 4, Cooler Pump 2 will al- ways operate. If a flow failure is detected, the unit will shut down and must be manually reset.

For all Cooler Pumps Sequence (PUMP) settings (including 0), closure of both the chilled water flow switch (CWFS) and the chilled water pump interlock contact (connected across TB5 terminals 1 and 2) are required. In addition, for Cooler Pumps Sequence settings of PUMP = 1, 2, 3, 4, normally open auxiliary contacts for Pump 1 and Pump 2 (wired in parallel) must be connected to the violet and pink wires located in the harness from the MBB-J5C-CH18 connector. The wires in the harness are marked "PMP1-13" and "PMP1-14". See the field wiring diagram in the 30XW Installation Instructions.

Regardless of the cooler pump control option selected, if the chilled water flow switch/interlock does not close within the Unit Off to On Delay period after the unit is enabled and in an ON mode, alarm P.91 will be generated. Other conditions which will trigger this alarm include:

•Cooler pump interlock is open for at least 15 seconds during chiller operation.

•Lag chiller in Master/Slave Control pump interlock does not close after 1 minute of the pump start command.

•Cooler pump control is enabled and the chilled water flow switch/interlock is closed for more than 2 minutes following a command to shut down the pump.

The last alarm criterion can be disabled. If Flow Checked if Pmp Off (Configuration OPTN P.LOC) is set to NO, the con- trol will ignore the pump interlock input if the cooler pump output is OFF.

The ComfortLink™ controls have the ability to periodically start the pumps to maintain the bearing lubrication and seal in- tegrity. If Pump Sticking Protection (Configuration OPTN PM.PS) is set to YES, and if the unit is off at 2:00 PM, a pump will be started once each day for 2 seconds. If the unit has

2 pumps, Pump 1 will be started on even days (such as day 2, 4, or 6 of the month); Pump 2 will be started on odd days. The de- fault for this option is PM.PS=NO.

The pump will continue to run for 60 seconds after an off command is issued.

COOLER PUMP CONTROL CONFIGURATIONS

No Pump Control — To configure cooler pump control op- tions with the Touch Pilot™ display:

DISPLAY NAME	PATH	LINE	VALUE
		NO.
Cooler Pumps	Main	8	0 (No Pump
Sequence	Menu→ Config→ USER		Control)

To configure cooler pump control options with the Naviga- tor™ display:

ITEM	ITEM EXPANSION	PATH	VALUE
PUMP	Cooler Pumps	Configuration→ OPTN	No Pump
	Sequence

Single Pump Control — To configure cooler pump control options with the Touch Pilot display:

DISPLAY NAME	PATH	LINE	VALUE
		NO.
Cooler Pumps	Main	8	1 (Single
Sequence	Menu→ Config→ USER		Pump Control)
Pump Sticking	Main		Default = No
		15	No = Disabled
Protection	Menu→ Config→ USER
			Yes = Enabled
Flow Checked	Main		Default = Yes
		17	No = Disabled
if C Pump Off	Menu→ Config→ USER
			Yes = Enabled

To configure cooler pump control options with the Naviga- tor display:

ITEM	ITEM EXPANSION	PATH	VALUE
PUMP	Cooler Pumps	Configuration→ OPTN	1 Pump Only
	Sequence
PM.PS	Periodic Pump	Configuration→ OPTN	Default = No
			No = Disabled
	Start		Yes = Enabled
P.LOC	Flow Checked	Configuration→ OPTN	Default = Yes
			No = Disabled
	if Pmp Off
			Yes = Enabled

Dual Pump and Manual Control — To configure cooler pump control options with the Touch Pilot™ display:

DISPLAY NAME	PATH	LINE	VALUE
		NO.
Cooler Pumps	Main Menu		2 (2 Pumps Automatic)
		8	3 (Pump 1 Manual)
Sequence	→ Config→ USER
			4 (Pump 2 Manual)
Pump Auto	Main Menu	14	Default = 48 hours
Rotation Delay	→ Config→ USER
Pump Sticking	Main Menu		Default = No
		15	No = Disabled
Protection	→ Config→ USER
			Yes = Enabled
Flow Checked	Main Menu		Default = Yes
		17	No = Disabled
if C Pump Off	→ Config→ USER
			Yes = Enabled

To configure cooler pump control options with the Naviga- tor™ display:

ITEM	ITEM EXPANSION	PATH	VALUE
PUMP	Cooler Pumps	Configuration→ OPTN	2 Pumps Auto
			PMP1 Manual
	Sequence
			PMP2 Manual
ROT.P	Pump Rotation	Configuration→ OPTN	Default =
	Delay		48 hours
PM.PS	Periodic Pump	Configuration→ OPTN	Default = No
			No = Disabled
	Start		Yes = Enabled
P.LOC	Flow Checked	Configuration→ OPTN	Default = Yes
			No = Disabled
	if Pmp Off
			Yes = Enabled

28