background image

 

Installation Tips 

 

Condensate Return Line 

Condensate from the header or tubes cannot be elevated.  Do not connect steam traps to  
pressurized condensate return lines. If gravity drain is not possible please use a condensate 
pump rated for 212°F water or PURE Humidifier Company Part No. 16033 Hartell A3X-115 
condensate pump. 
 

Laminar air flow 

Tube assembly must be installed in a location that allows for laminar air flow across entire 
grid.  A minimum velocity of 300 feet per minute is required to avoid saturation and excessive 
fog travel. 
 

Plug fan installations 

Install tube assembly as close as possible to the upstream coil to ensure laminar airflow and 
proper absorption.  

 
Insulated ducts 

Internally insulated ducts must be lined with a non-absorbent material to avoid saturation.  If 
the duct is lined it must be removed three feet (3’) upstream and ten feet (10’) downstream of 
tube assembly. 
  

Final Filters 

Tube assembly must be installed a minimum of ten feet (10’) upstream of final filters. 
 

VAV Systems 

Low velocity will cause long fog trails and steam will rise wetting the top of the AHU/duct 
casing.  Modulating 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 the use of an air flow proving switch or fan interlock to 
prove air flow prior to humidifier cooperation.  Humidifier operation without air flow will result 
in over-saturation of the air stream.  Air flow proving switches are available as optional 
equipment from your PURE Humidifier Co. representative. 
 

High-Limit Humidistat 

PURE Humidifier Co. recommends the use of a duct high-limit humidistat to prevent 
humidifier operation when the duct humidity level exceeds 85% relative humidity.  Humidifier 
operation above 85% relative humidity can result in over-saturation of the air stream.  High-
limit humidistats are available as optional equipment from your PURE Humidifier Co. 
representative.  The high limit humidistat should be 12 to 14 feet (365-427 cm) downstream 
from the humidifier injection tube. 
 

Smoke Alarms and Temperature Sensors 

Smoke alarms should be located 12 to 14 feet (365-427 cm) upstream from the humidifier 
injection tube. 
 
Temperature sensors should be located 12 to 14 feet (365-427 cm) downstream from the 
humidifier injection tube, or past any visible fog travel that may be greater than this distance

.

 

 
 
 
 

 

 

Summary of Contents for INSTY-PAC

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 10: ...9...

Page 11: ...10...

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

Reviews: