Armstrong World Industries 182, 243, 302, 242 Specifications, Magic-Pak HW/HWC, FAN ON Low Voltage

SPECIFICATIONS Magic-Pak: HW/HWC

2-20

5.The circulating air blower shuts off approximately 90 seconds after G terminal on the blower control board is de-energized (see note below).

FAN ON

Low Voltage

1.When the switch on the thermostat is moved to the “FAN ON” position, a 24-volt signal is sent to G.

2.With G energized, the blower control board starts a countdown to fan “on”. After approximately 15 seconds, the fan starts (see note below).

3.The blower control board closes a relay on the board, sending line voltage to the terminal marked COOL on the board. This starts the circulating air blower.

4.When the switch at the thermostat is moved to the “OFF” position, the 24-volt signal to the blower control board is interrupted. With no signal at the

G terminal, the blower control board starts a countdown to fan “off”. Approximately 90 seconds later, a relay on the blower control board opens (see note below). This interrupts the power to and stops the circulating air blower.

Note: Heatcraft blower control boards have a G “on” delay of 15 seconds and an “off” delay of 90 seconds. Tridelta blower control boards have no “on” time delay and a 60 -130 second “off” delay.

SRM-HW/HWC

2/99