3
Split & Cuffed Insty-Pac Injection Tube Assembly
Internal Mounting Instructions
The Insty-Pac tube assembly supplied is designed for rapid dissipation of steam.
The tube assembly is designed for
internal
AHU or duct mounting.
Verify Components
Unpack the components from the shipping container. Verify all components are checked off
according to the packing list and the
COMPONENTS IDENTIFICATION DRAWING
(Fig. 2).
Report any missing pieces to your local PURE Humidifier Co. representative immediately.
Location
1. Mount the injection tube assembly in the AHU or duct work as shown on the
project plans or as indicated by the engineer.
2. Install the injection tube with the 3/4”-NPT drain connection, located on the tube
header, directed towards the bottom of the AHU or duct.
3. Install the tube assembly so that the injection tubes are
level
within the AHU or duct.
4. Install the tube assembly with the steam discharge ports facing upwards.
5. The tube assembly should be centered in the AHU or duct height with an even
distance between the bottom tube and the casing floor and the top tube and the
casing
ceiling.
Mounting
1. Layout the center lines for the injection tube SUPPLY and CONDENSATE connections.
The supply connections outside diameter may vary, the condensate connection is 1-1/16”
outside diameter. Duct plates are provided to seal the opening. The layout should be
based on the “Location” instructions listed above (see Fig. 3).
2. Cut a hole through the AHU or duct wall for the supply connection. If the alternate
horizontal condensate drain connection is supplied, cut a 1-1/16” diameter hole
through the AHU or duct wall, for the drain connection (see Fig. 3).
3. Install the tube HEADER onto the inside of the AHU or duct wall with the steam supply
connection installed through the access hole (cut in step above). Secure the header to
the AHU or duct wall with 3/8-16 fasteners (by others). The HEADER is provided with
header mounting brackets welded onto the header (see Fig. 2)
4. Slip one side of each of the FLEXIBLE CONNECTORS onto the 1” diameter s t u b - o u t s
on the HEADER and secure the FLEXIBLE CONNECTOR to the header with one screw
clamp per stub-out (see Fig. 2 & 3).
5. Slide the open end of the UPPER TUBE BANK into the open side of the matching
FLEXIBLE CONNECTOR. Secure each tube to the FLEXIBLE CONNECTOR by
tightening the matching screw clamp (see Fig. 2 & 3). Repeat the same steps with e a c h
remaining tube bank assembly.
6. Secure the END BRACKET to the AHU or duct wall with 3/8-16 fasteners (by
others). The END BRACKET must be located so that tubes are
level
(see Fig. 3).
7. Seal the openings where the STEAM SUPPLY and CONDENSATE connections
penetrate through the AHU or duct wall with the duct plates provided (see Fig. 3).
8. Supply piping, valve and strainer require independent support (by others in field).
9. Control valve, traps and strainer are shipped loose for field installation (by others). All
condensate and supply piping is by others.
NOTE: For tube assemblies over 48” (122 cm) in length, allow for 1/2” (1.3 cm) of linear
expansion of tubes. Not allowing for this expansion could cause system performance
issues or cracking of welds.
