Carrier 50FK Ð Smoke Control Modes, Ð Smoke Control Switches Required for Each Mode, Fire, Purge

INSTALLATION Ð To enable one or more of the possible smoke control modes available with these units, determine the switches required for the desired mode(s) from Table 6, ®eld-supply and install the appropriate switches and ®eld wire per Fig. 32. Switch functions are shown in Table 7.

Table 5 Ð Smoke Control Modes

		MODE
FUNCTION	Fire	Pressur-	Evacuation*	Smoke
	Shutdown	ization		Purge*
Supply Fan	Off	On	Off	On
IGV/VFD²	Ð	Open/On	Ð	Open/On
Economizer	Closed	Open	Open	Open
Return Air	Open	Closed	Closed	Closed
Damper
Exhaust	Off	Off	On	On
Fans
Exhaust	Closed	Closed	Open	Open
Damper
LEGEND

IGV Ð Inlet Guide Vane

VAV Ð Variable Air Volume

VFD Ð Variable Frequency Drive

*Power exhaust option/accessory required for this mode. ²Applicable to VAV units with appropriate options.

CONFIGURATION Ð No set points required for Smoke Con- trol modes. Modes are activated by energizing all switches appropriate for each Smoke Control mode.

OPERATING SEQUENCE

Fire Shutdown Ð At command from the ®eld switches (see Table 5), all unit operation (cooling, heating, supply fan and power exhaust) will terminate.

Pressurization Ð At command from the ®eld switches for Pressurization mode (see Table 5):

1.Economizer dampers will open

2.The HIR function will energize, opening room terminals to full-open (heating) positions.

3.Supply fan will run. (If equipped with IGV: control vanes

will open. If equipped with VFD: the VFD will control to duct static set point or best available with all terminals open.)

4.Power exhaust dampers (if equipped) will close.

5.Power exhaust fans (if equipped) will turn off.

Evacuation Ð At command from the ®eld switches for Evacu- ation mode (see Table 5):

1.Supply fan will turn off.

2.Economizer dampers will open.

3.Exhaust fans will run at maximum capacity.

4.Exhaust dampers will open.

Smoke Purge Ð At command from the ®eld switches for Smoke Purge mode (see Table 5):

1.Economizer dampers will open.

2.The HIR function will energize, opening room terminals to full-open (heating) positions.

3.Supply fan will run. (If equipped with IGV: Control vanes

will open. If equipped with VFD: the VFD will control to duct static set point or best available with all terminals open.)

4.Exhaust fans will run at maximum capacity.

5.Exhaust dampers will open.

Table 6 Ð Smoke Control Switches Required for Each Mode

FIRE		EVACUATION	SMOKE
	PRESSURIZATION	(Modulating Power
SHUTDOWN			PURGE
		Exhaust)
SW-1	SW-1	SW-1	SW-1
SW-2	SW-2	SW-2	SW-2
	SW-4	SW-3	SW-3
	SW-5	SW-5	SW-4
	SW-6	SW-6	SW-9A/B
	SW-9A/B	SW-7
		SW-8

NOTE: All switches are shown in ``as installed'' (power OFF or deenergized) position. In these positions, none of these modes will be activated; normal unit operation is permitted by the base unit controls. To initiate any mode, all switches listed under this mode in the table must be energized, causing the depicted contact position to change from depicted positions to energized positions. Switches may be manually or electrically operated.

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