Carrier 30HXA, HXC076-186 installation instructions Ð Field Control Wiring

	LEGEND
ALM	Ð Alarm
CCN	Ð Carrier Comfort Network
COMM	Ð Communications
CWFS	Ð Chilled Water (Fluid) Flow Switch
CWP	Ð Chilled Water (Fluid) Pump
CWPI	Ð Chilled Water (Fluid) Pump Interlock
EQUIP	Ð Equipment
GND, GRD Ð Ground
NEC	Ð National Electrical Code (U.S.A.)
TB	Ð Terminal Block
	Field Power Wiring

Field Control Wiring

Factory-Installed Wiring

NOTES:

1.Factory wiring is in accordance with NEC. Field modi®cations or additions must be in compliance with all appli- cable codes.

2.Wiring for main ®eld supply must be rated 75° C minimum. Use copper for all units. Maximum incoming wire size for each terminal block is 500 kcmil.

3.Power for control circuit should be supplied from a separate source through a ®eld-supplied, fused disconnect with 15 amp maximum protection for all control circuits. Connect control circuit power to terminals 1 and 2 of TB4. Connect neutral side of supply to terminal 2 of TB4. Control circuit conductors for all units must be copper only.

4.Terminals 13 and 14 of TB2 are for ®eld external connection for remote on-off. The contacts must be rated for dry circuit application capable of handling a 24 vac to 50 mA load. Remove jumper between 13 and 14 of TB2 if remote on-off is installed.

5.Terminals 11 and 12 of TB2 are for chilled water ¯ow switch (CWFS) and chilled water pump interlock (CWPI) functions. The contacts must be rated for dry circuit application capable of handling a 24 vac to 50 mA load.

6.Terminals 4 and 5 of TB2 are for control of chilled water pump starter. The maximum load allowed for the chilled water pump relay is 125 va sealed, 1250 va inrush.

7.Terminals 2 and 3 of TB2 are for alarm. The maximum load allowed for the alarm is 125 va sealed, 1250 va inrush.

Fig. 13 Ð Field Control Wiring

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