Carrier 30XW150-400 specifications Operating Control Type Operating Modes→ Slct CCN Control

DUAL CHILLER PUMP CONTROL FOR PARALLEL CHILLER APPLICATIONS — It is recommended that a dedicated pump be used for each unit. The chiller must start and stop its own water pump located on its own piping. If pumps are not dedicated for each chiller, chiller isolation valves are required and each chiller must open and close its own isolation valve.

DUAL CHILLER CONTROL FOR SERIES APPLICA- TIONS — To configure the master chiller for series applica- tions using the Touch Pilot™ display, see Table 28. To

configure the master chiller for series applications using the Navigator™ display, see Table 29. A power cycle is required for the values to take effect.

To configure the slave chiller for series applications using the Touch Pilot™ display, see Table 30. To configure the slave chiller for series applications using the Navigator™ display, see Table 31.

Table 27 — Dual Slave Chiller Control Parameters for Parallel Applications with Navigator™ Display

ITEM	ITEM EXPANSION	PATH	VALUE
MSSL	Master/Slave Select	Configuration→ RSET	Slave
			Default: Disable
			Must be set to the Slave Chiller’s address.
SLVA		Configuration→ RSET	The master and slave chiller must have
	Slave Address		different addresses and be on the same
			Bus Number
			Default: 2
LLBL	Master Lead Lag Select	Configuration→ RSET	Range: Always Lead, Lag if Fail, Runtime Sel
			Default: Always Lead
LLBD	Lead/Lag Balance Delta	Configuration→ RSET	Range: 40 to 400 hours
			Default: 168 hours
LLDY	Lag Start Delay	Configuration→ RSET	Range: 2 to 30 minutes
			Default: 10 minutes
LL.ER	Start If Error Higher	Configuration→ RSET	Range: 3.0 to 18 ΔF (1.7 to 10.0 ΔC)
			Default: 4.0 ΔF (2.2 ΔC)
LAG.M	Lag Unit Pump Select	Configuration→ RSET	Range: Off If U Stp, On If U Stop
			Default: Off If U Stp
LPUL	Lead Pulldown Time	Configuration→ RSET	Range: 0 to 60 minutes
			Default: 0 minutes
SERI	Chillers in Series	Configuration→ RSET	No,
			Default: No
OPER	Operating Control Type	Operating Modes→ SLCT	CCN Control

Table 28 — Dual Master Chiller Control Parameters for Series Applications with Touch Pilot Display

DISPLAY NAME	PATH	LINE NO.		VALUE
Master/Slave Select	Main Menu→ Config→ MST_SLV	3	1	(Master)
			Default: 0 (Disable)
			1	(Local Control)
Master Control Type	Main Menu→ Config→ MST_SLV		2	(Remote Control)
		7	3	(CCN Control)
			Default: 1 (Local Control)
			Value: Configure for proper control type.
			Must be set to the Slave Chiller’s address.
Slave Address	Main Menu→ Config→ MST_SLV		The master and slave chiller must have
		11	different addresses and be on the same
			Bus Number
			Default: 2
			0	(Master Always Leads)
Lead Lag Select	Main Menu→ Config→ MST_SLV	12	1	(Lag Once Failed Only)
			2	(Lead/Lag Runtime Select)
			Default: 0 (Master Always Leads)
Lead/Lag Balance Delta	Main Menu→ Config→ MST_SLV	16	Range: 40 to 400 hours
			Default: 168 hours
Lag Start Timer	Main Menu→ Config→ MST_SLV	17	Range: 2 to 30 minutes
			Default: 10 minutes
Lead Pulldown Time	Main Menu→ Config→ MST_SLV	18	Range: 0 to 60 minutes
			Default: 0 minutes
Start If Error Higher	Main Menu→ Config→ MST_SLV	19	Range: 3.0 to 18 ΔF (1.7 to 10.0 ΔC)
			Default: 4.0Δ F (2.2 ΔC)
Lag Minimum Running Time	Main Menu→ Config→ MST_SLV	20	Range: 0 to 150 minutes
			Default: 0 minutes
Lag Unit Pump Control	Main Menu→ Config→ MST_SLV	21	0	(Stop If Unit Stops)
			1	(Run If Unit Stops)
			Default: 0 (Stop If Unit Stops)
Chiller In Series	Main Menu→ Config→ MST_SLV	22	Yes
			Default: No

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