14
12.
Pull up on the auto drain knob until it is set in the “UP”
position. Verify that there is pressure on the piston gauge.
12a.
Open the manual pull station, and bleed off any air
that is present.
12b.
Close the manual pull station.
13
. Replace the protective cap over the auto drain knob.
13a.
Check the gauge on the Series 79N assembly to con-
firm that there is water supply pressure on the upper
chamber.
14.
If a Series 746 Dry Accelerator is used, open the
¹⁄₄
-
turn vent ball valve on the accelerator.
14a.
Open the isolation ball valve on the Series 746 Dry
Accelerator.
14b.
Close the
¹⁄₄
-turn vent ball valve on the Series 746
Dry Accelerator. This will set the accelerator.
15.
Observe the system air pressure over a 24-hour period
to confirm system integrity. If there is degradation in sys-
tem air pressure, find the leaks and correct.
NOTE:
NFPA
requires less than 2-psi (14-kPa) leakage in 24 hours.
• Make sure the protective cap is replaced on the auto drain knob to avoid accidental
contact.
Hitting the knob will cause the valve to trip, resulting in property damage.
Auto Drain
Knob
Auto Drain
Protective
Cap
Accelerator
¹⁄₄
-turn
Vent Ball Valve
Accelerator
Isolation
Ball Valve
Accelerator
¹⁄₄
-turn
Vent Ball Valve
DISCONTINUED
PRODUCT
