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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. 

Содержание INSTY-PAC

Страница 1: ...gravity to an open drain condensate cannot be elevated 4 Each condensate connection must have it s own steam trap Condensate connections cannot be combined together to a common steam trap 5 A common...

Страница 2: ...cking CSCC and chloride pitting of stainless steel components is not covered by warranty Do not use hydrochloric acid descalers or bleach to clean the tank Consult the factory if you are unsure about...

Страница 3: ...70 80 85 Relative Humidity Leaving Relative Humidity Leaving Relative Humidity Entering Relative Humidity Entering Non Wetting Distance With a Insty Pac Tube Assembly Having 6 Centers The above is ba...

Страница 4: ...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...

Страница 5: ...supply inlet 5 Duct plate condensate 1 6 Tube support bracket 1 per tube bank 7 Flexible connector 1 per tube 1 NPT valve connection 4 2 6 3 Fig 2 Tube drain connection 3 4 NPT Header drain connection...

Страница 6: ...g bracket welded to header Notes 1 Center the multiple injection tube assembly in the duct height 2 The injection tubes should be mounted level within the duct or AHU 3 Install injection tubes with th...

Страница 7: ...g VAV high limit humidistat is required A minimum velocity of 300 feet per minute is required to avoid saturation and excessive fog travel Controls Fan Interlock Switch PURE Humidifier Co recommends t...

Страница 8: ...ure 5 Undersized humidifier 6 Automatic control valve not opening fully A Pneumatic valve operator leaking air B Valve stem sticking Humidifier Discharges Water 1 Faulty drainage A Return line pressur...

Страница 9: ...is not leaking air b the valve closes off tightly c the stem packing is not leaking steam Valve Electric Should be inspected annually to confirm that the stem packing is not leaking and that the valv...

Страница 10: ...9...

Страница 11: ...10...

Страница 12: ...11 141 Jonathan Blvd North Chaska MN 55318 Tel 952 368 9335 Fax 952 368 9338 www purehumidifier com...

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