Pure Humidifier SX Series Operation and maintenance manual

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READ AND SAVE THESE INSTRUCTIONS
Standard Water
SX Series
Steam Heat Exchanger Humidifier
Installation Instructions
Operation and Maintenance Manual
Our results are comforting
PURE HUMIDIFIER® and INTAC® are registered trademarks of PURE Humidifier Co.
Form No: SXOM-6-2023

TM
We at PURE Humidifier Co. thank you for choosing one of our quality products. PURE Humidifier Co.’s SX Series humidifiers
are models of simplicity to install, operate and maintain. However, they must be maintained to provide maximum operating
efficiency.
PLEASE READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY. PROPER OPERATION AND HUMIDITY CONTROL
IS POSSIBLE ONLY WITH PROPER INSTALLATION AND MAINTENANCE.
The SX Series Humidifier utilizes a Tri-Probe conductive type water control system, which is designed for use with standard
(hard or soft) tap water. Use of demineralized, deionized or reverse osmosis water will cause a failure of the water level
control system and void the warranty.
High chloride content in feed water can cause chloride stress cracking and chloride pitting in stainless components. Chloride
stress corrosion cracking (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. We offer an easy-to-use, non-toxic descaling solution to help keep
your units clean and operating with maximum efficiency. Please contact your local PURE Humidifier representative for more
information about our PURE Clean descaling solution.
PURE Humidifier Co.’s SXDDR Series should be installed on applications that require demineralized, deionized or reverse
osmosis water.
To ensure proper installation of this product, it must be installed by qualified HVAC and electrical contractors, and must
be in compliance with local, state, federal, and governing codes. If installed improperly this product may cause damage to
property, severe personal injury, or death as a result of electric shock, burns, and/or fire.
Do not adjust any components inside humidifier control box without consulting the factory
For indoor installation only unless supplied with an outdoor enclosure.
To the User of PURE Humidifier Co.’s
SX Humidifiers

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Introduction
Warnings ……………………………………………………………………………………….....
Overview
Features ………………………………………………………………………………………......
Capacities, Weights & Water Volumes …………………………………………………………
Clearances & Mounting Considerations ………………………………………………............
Dimensions
SX-1R through SX-4R …………………………………………………………………
SX-8R ……………………………………………………………………….................
SX-12R ………………………………………………………………………...............
Installation
Installation & Location ……………………………………………………………………….…..
Mounting Applications
Support Legs …………………………………………………………………….…..
Wall Brackets ………………………………………………………………………...
Drain Pan Mounting ……………………………………………………………………….…...
Piping
Water Supply&DrainPiping ……………………………………………………………
Drain Piping ………………………………………………………………………….....
Steam & Condensate Piping
SX-1R through SX-4R …………………………………………………………………
SX-8R ……………………………………………………………………….................
SX-12R ………………………………………………………………………...............
Supply Piping Examples …………………………………………………………………….......
Injection Tube Installation ………………………………………………………………….…....
Steam Supply Piping …………………………………………………………………….……....
Blower Pack …………………………………………………………………….…………….......
Controls Location …………………………………………………………………………..….....
Operation
Pre-Startup Checklist …………………………………………………………………….……....
SX Startup Procedure…..……..………………………………………………….…..................
Troubleshooting ………………………………………………………………………………......
Maintenance
Maintenance Instructions ………………………………………………………….………….....
Exchanger Gasket Replacement Instructions ………………………………….………..........
Cover Gasket Replacement Instructions ……………………………………….………….......
Tool Requirements and Torque List ………………………………………….…………….......
Maintenance Notes ……………………………………………………………….………….......
Spare Parts
SX-1R through SX-4R Exploded Parts Drawing ………………………………………………
SX-1R through SX-4R Parts List ………………………………………………………………..
SX-8R Exploded Parts Drawing ………………………………………………........................
SX-8R Parts List ………………………………………………………………..........................
SX-12R Exploded Parts Drawing ………………………………………………......................
SX-12R Parts List ………………………………………………………………........................
Warranty ……………………………………………………………………………………….…………....
Table of Contents
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21-22
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PLEASE READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY. PROPER OPERATION AND HUMIDITY CONTROL
IS POSSIBLE ONLY WITH PROPER INSTALLATION AND MAINTENANCE.
To ensure proper installation of this product, it must be installed by qualified HVAC and electrical contractors, and must be
in compliance with local, state, federal, and governing codes. If installed improperly this product may cause damage to
property, severe personal injury, or death as a result of electric shock, burns, and/or fire.
WARNINGS
SERVICING
Disconnect main power before servicing or maintaining humidifier.
The humidifier system including the humidifier tank, steam supply piping, condensate piping and steam distribution grid can
be extremely hot and can cause burns if touched.
Do not use hydrochloric acid descalers or bleach to clean the tank. Consult the factory if you are unsure about which
chemical descaler to use.
ELECTRICAL
Electrical work should be done by qualified electrical contractors and must be in compliance with local, state, federal, and
governing codes.
PLUMBING
Plumbing and pressurized steam work should be done by qualified installers and must be in compliance with local, state,
federal, and governing codes.
Drain and overflow water can be 212°F (100°C). If you are not using a DCT-927 Drain Tempering Kit, allow the water to cool
before draining tank.
INSTALLATION
This humidifier produces steam at atmospheric pressure. Do not install any components between humidifier tank and steam
distribution grid which can block or restrict steam flow.
Do not mount on hot surfaces.
Do not mount on vibrating surfaces.
High chloride content in feed water can cause chloride stress cracking and chloride pitting in stainless components. Chloride
stress corrosion cracking (CSCC) and chloride pitting of stainless steel components is not covered by warranty.
Use of mineralized (hard or soft) tap water will cause fill valve failure and void the warranty. PURE Humidifier Co.’s SX
Series should be installed on applications that require tap water.
Do not adjust any components inside humidifier control box without consulting the factory.
For indoor use only unless supplied with an Outdoor Enclosure.
WARNINGS
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Features
Features
1. Tri-Probe Sensor 5. Heat Exchanger/Plant Steam Condensate Outlet
2. 1/4” NPT Fill Inlet Connection 6. Pressurized Boiler Steam Inlet
3. Overflow Piping 7. Heat Exchanger
4. Automatic Drain Valve 8. Humidifier Steam Outlet Connection
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3
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Capacities, Weights & Water Volumes
Humidifier Capacity †
Model
Steam Pressure at the Humidifier Control Valve
5 psig 34.5 kPa 10 psig 69 kPa 13 psig 90 kPa 15 psig 103 kPa
lbs/hr kg/hr lbs/hr kg/hr lbs/hr kg/hr lbs/hr kg/hr
SX-1R 32 14.5 76 34.5 100 45.3 122 55.3
SX-2R 52 23.6 108 48.9 140 63.5 169 76.7
SX-3R 102 46.3 228 103.4 292 132.5 348 157.8
SX-4R 192 87.1 484 219.5 655 297.1 753 341.7
SX-8R 370 167.8 840 381.0 1200 544.3 1350 612.4
SX-12R 560 254.0 1265 573.8 1810 821.0 2035 923.1
† Actual humidifier capacity may vary due to the heat loss from the humidifier reservoir. The ambient air
temperature, air velocity and injection tube system will affect the rate of heat loss from the reservoir.
The capacities shown are based on a non-insulated humidifier reservoir tested in a 70°F environment.
Humidifier Weights †
Model
Shipping Weight Operating Weight
lbs kg lbs kg
SX-1R 32 14.5 76 34.5
SX-2R 52 23.6 108 48.9
SX-3R 102 46.3 228 103.4
SX-4R 192 87.1 484 219.5
SX-8R 370 167.8 840 381.0
SX-12R 560 254.0 1265 573.8
†When calculating the total dry weight of the humidifier, the control cabinet weight (28
lbs/12.7kg) must be added to the reservoir weight.
Reservoir Water Volume
Model Gallons Liters
SX-1R 9.3 35.2
SX-2R 13.2 50.0
SX-3R 23.5 89.0
SX-4R 52.4 198.4
SX-8R 115.8 438.4
SX-12R 203.8 771.5
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Mounting Location Considerations
Install in a location where the ambient air temperature is between 40°F - 100°F (4.4°C - 37.8°C) and relative humidity between 0% - 90%
and non-condensing.
Install in a location where there is easy access to a water supply, electrical supply, and open sanitary drain.
Install as close as possible to the steam distribution grid.
Clearances shown are minimum recommendations only. Please consult local and national codes for final installation location.
Do not install where humidifier operational noise will be a nuisance.
Allow enough room for proper water seal depths.
Do not install above any critical processes, equipment, or locations in case of a water leak.
Do not install near variable frequency drives, electromagnetic equipment, or motors.
Clearances & Mounting
Considerations
SX-1R: 20” (50.8 cm)
SX-2R: 20” (50.8 cm)
SX-3R: 24” (61.0 cm)
SX-4R: 34” (86.4 cm)
SX-8R: 34” (86.4 cm)
SX-12R: 34” (86.4 cm)
24”
(61 cm)
6”
(15.2 cm)
12”
(30.5 cm)
6”
(15.2 cm)
36” (91.4 cm) with factory mounted
control panel
6” (15.2 cm) without factory mounted
control panel
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Dimensions
SX-1R through SX-4R
Cabinet Depth: 6.00” (15.2)
1. Door has been removed from the drawing
for clarity.
2. Control cabinet is shipped loose for field
mounting unless optional factory mounting
is specified.
3. Control cabinet weight: 28 lbs (12.7 kg)
4. 1 Amp @ 120VAC Control circuit: 24 VAC
Steam Outlet Connection
(size and qty will vary w/application
“A”
Right Side View
NEMA-12 Humidifier Control Cabinet
(reference control cabinet notes)
“E”
“D”
Front View
Top View
“B”
“C”
1.04”
(2.6)
9”
(22.9)
3.625”
(9.21)
SX-1R: 3.53” (8.9)
SX-2R: 3.53” (8.9)
SX-3R: 3.56” (9.0)
SX-4R: 5.44” (13.8)
Heat Exchanger Removal
(see Clearances &
Mounting Considerations
page for clearance
dimension)
Unit Dimensions
Model
Dim. “A” Dim. “B” Dim. “C”
Dim. “D” Strainer
inches cm inches cm inches cm
SX-1R 17.68” 44.9 16.21” 41.2 13.84” 35.2 3/4” NPT 3/4” NPT
SX-2R 25.68” 65.2 16.21” 41.2 13.84” 35.2 3/4” NPT 3/4” NPT
SX-3R 34.18” 86.8 20.46” 52.0 13.84” 35.2 1-1/2” NPT 1-1/2” NPT
SX-4R 54.12” 137.5 29.46” 74.8 13.84” 35.2 2” NPT 2” NPT
*When calculating the total dry weight of the humidifier, the control cabinet weight must be added to the reservoir weight.
Due to product improvement, catalog dimensions and specifications are subject to change without notice.
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Dimensions
SX-8R
Steam Outlet Connection
(size and qty will vary w/application
“A”
Right Side View
NEMA-12 Humidifier Control Cabinet
(reference control cabinet notes)
“E”
“D”
Front View
Top View
“B”
“C”
3.87”
(9.8)
1.04”
(2.6)
9”
(22.9)
3.625”
(9.21)
Heat Exchanger Removal
(see Clearances &
Mounting Considerations
page for clearance
dimension)
Unit Dimensions
Model
Dim. “A” Dim. “B” Dim. “C”
Dim. “D” Strainer
inches cm inches cm inches cm
SX-8R 54.12” 137.5 29.46” 74.8 31.53” 80.1 2” NPT 2” NPT
*When calculating the total dry weight of the humidifier, the control cabinet weight must be added to the reservoir weight.
Due to product improvement, catalog dimensions and specifications are subject to change without notice.
Cabinet Depth: 6.00” (15.2)
1. Door has been removed from the drawing
for clarity.
2. Control cabinet is shipped loose for field
mounting unless optional factory mounting
is specified.
3. Control cabinet weight: 28 lbs (12.7 kg)
4. 1 Amp @ 120VAC Control circuit: 24 VAC
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Dimensions
SX-12R
Steam Outlet Connection
(size and qty will vary w/application
“A”
Right Side View
NEMA-12 Humidifier Control Cabinet
(reference control cabinet notes)
“E”
“D”
Front View
Top View
“B”
“C”
3.87”
(9.8)
1.04”
(2.6)
9”
(22.9)
3.625”
(9.21)
Unit Dimensions
Model
Dim. “A” Dim. “B” Dim. “C”
Dim. “D” Strainer
inches cm inches cm inches cm
SX-12R 54.12” 137.5 29.46” 74.8 42.28” 107.4 2” NPT 2” NPT
*When calculating the total dry weight of the humidifier, the control cabinet weight must be added to the reservoir weight.
Due to product improvement, catalog dimensions and specifications are subject to change without notice.
Heat Exchanger Removal
(see Clearances &
Mounting Considerations
page for clearance
dimension)
Cabinet Depth: 6.00” (15.2)
1. Door has been removed from the drawing
for clarity.
2. Control cabinet is shipped loose for field
mounting unless optional factory mounting
is specified.
3. Control cabinet weight: 28 lbs (12.7 kg)
4. 1 Amp @ 120VAC Control circuit: 24 VAC
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