User's Manual

A UTC Fire & Security Company
Effective: April 2007
K-90-114
Kidde ADS
Grooved Nut Discharge Head and
Plain Nut Discharge Head
P/Ns: 872442 and 872450
FEATURES
• Grooved Nut Discharge Head Can Only be Actuated
with a Control Head
• Grooved Nut Discharge Head is for Use with Single
Nitrogen Driver Systems Only (225-lb. and
395-lb. Systems)
• Plain Nut Discharge Head Can be Actuated by
Control Head or Back Pressure from Manifold
• Plain Nut Discharge Head is Used with Multiple
Nitrogen
Driver Systems (i.e., 675-lb. and 1010-lb. Systems)
• UL Listed
• FM Approved
DESCRIPTION
At installation, each nitrogen driver cylinder and valve
assembly must be equipped with a discharge head to
actuate the cylinder valve. The discharge head is assem-
bled to the top of the nitrogen driver cylinder valve and
contains a spring-loaded piston which, when actuated by
nitrogen pressure, is designed to depress the main check
in the valve and transfer the contents of the nitrogen tank
into the agent cylinder. The transfer outlet is designed to
mate with the swivel adapter on the 1-in. flexible transfer
hose (P/N 06-118207-00X). The discharge head also
contains an integral stop check which, in the event that a
cylinder is removed from the Kidde ADS assembly, auto-
matically prevents the loss of nitrogen during the system
transfer. The grooved-nut discharge head only allows the
cylinder to be actuated when a control head releases
pilot pressure. Pressure entering the outlet from the man-
ifold will not actuate the cylinder. The plain nut discharge
head allows the nitrogen driver to be actuated by the con-
trol head (electric or pneumatic) or by back pressure dis-
charge in the manifold. The plain nut discharge head is
convenient for applications using multiple drivers for one
agent cylinder.
Note: For additional detail regarding ADS and FM-200
systems and nitrogen manifolding, refer to the
Design, Installation, Operation and Maintenance
Manual (P/N 90-FM200M-030).
INSTALLATION
1. Wipe off cylinder valve sealing surface.
2. Verify that the O-rings are installed in the mating
surface grooves at the bottom of the swivel nut cav-
ity. O-rings must be free of dirt or other contami-
nants. The O-rings have been lightly greased at the
factory and should not require further greasing.
3. Make sure the pilot orifice located between the inner
and outer O-ring is unobstructed.
4. Make sure the discharge port is clean and unob-
structed.
5. Install the discharge head on the cylinder valve.
Tighten securely.
MAINTENANCE
MONTHLY:
Inspect nitrogen driver discharge head for cracks, corro-
sion, grime, etc. Ensure that the discharge head is tightly
secured to the nitrogen cylinder valve and connected to
the agent cylinder with the 1-in. nitrogen transfer hose. If
any defects are found during the monthly inspection,
immediately contact a Kidde Distributor to service the
systems.
WARNING
The agent storage cylinder must be
permanently connected to the system
piping. Never attach the discharge
head to the cylinder valves until the
cylinders are secured in brackets or
racking and the hose is attached to the
agent cylinder. Under no circum-
stances should the discharge head
remain attached to the cylinder valve
after removal from service or during
shipment, handling, storage or filling.
In the event of inadvertent discharge,
failure to follow these instructions
could result in death, serious bodily
injury and/or property damage.