PURE SXDDR Series User manual

TM
READ AND SAVE THESE INSTRUCTIONS
Deionized, Demineralized, or Reverse Osmosis Water
SXDDR 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: SXDOM-6-2023

TM
We at PURE Humidifier Co. thank you for choosing one of our quality products. PURE Humidifier Co.’s SXDDR 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 SXDDR Series Humidifier is specifically designed to operate with deionized, demineralized, or reverse osmosis water.
All components that will be in conact with water are constructed of stainless steel, incoloy, or corrosion-resistant materials.
Use of mineralized (hard or soft) 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.
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.
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.
Installation of humidifier in high humidity or salt water atmospheres will cause accelerated corrosion, resulting in a reduction
of the normal lifespan of the unit.
For indoor installation only unless supplied with an Outdoor Enclosure.
To the User of PURE Humidifier Co.’s
SXDDR Humidifiers

TM
Introduction
Warnings ……………………………………………………………………………………….....
Overview
Features ………………………………………………………………………………………......
Capacities, Weights & Water Volumes …………………………………………………………
Clearances & Mounting Considerations ………………………………………………............
Dimensions
SXDDR-1R through SXDDR-4R ……………………………………………………..
SXDDR-8R ……………………………………………………………………….........
SXDDR-12R ……………………………………………………………………….......
Installation
Installation & Location ……………………………………………………………………….…..
Mounting Applications
Support Legs …………………………………………………………………….…..
Wall Brackets ………………………………………………………………………...
Drain Pan Mounting ……………………………………………………………………….…...
Piping
Water Supply&DrainPiping ……………………………………………………………
Drain Piping ………………………………………………………………………….....
Steam & Condensate Piping
SXDDR-1R through SXDDR-4R ………………………………………………………
SXDDR-8R ……………………………………………………………………….........
SXDDR-12R ……………………………………………………………………….......
Supply Piping Examples …………………………………………………………………….......
Injection Tube Installation ………………………………………………………………….…....
Steam Supply Piping …………………………………………………………………….……....
Blower Pack …………………………………………………………………….…………….......
Controls Location …………………………………………………………………………..….....
Operation
Pre-Startup Checklist …………………………………………………………………….……....
SXDDR Startup Procedure…..……..………………………………………………….…...........
Troubleshooting ………………………………………………………………………………......
Maintenance
Maintenance Instructions ………………………………………………………….………….....
Exchanger Gasket Replacement Instructions ………………………………….………..........
Cover Gasket Replacement Instructions ……………………………………….………….......
Tool Requirements and Torque List ………………………………………….…………….......
Maintenance Notes ……………………………………………………………….………….......
Spare Parts
SXDDR-1R through SXDDR-4R Exploded Parts Drawing …………………………………..
SXDDR-1R through SXDDR-4R Parts List ……………………………………………………
SXDDR-8R Exploded Parts Drawing ………………………………………………................
SXDDR-8R Parts List ………………………………………………………………..................
SXDDR-12R Exploded Parts Drawing ………………………………………………..............
SXDDR-12R Parts List ………………………………………………………………................
Warranty ……………………………………………………………………………………….…………....
Table of Contents
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18-19
20
21-22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

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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
1

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Features
Features
1. Low Water Float Switch Junction Box 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. 3/4” NPT Ball Valve 8. Humidifier Steam Outlet Connection
1
2
3
46
8
7
5
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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
SXDDR-1R 32 14.5 76 34.5 100 45.3 122 55.3
SXDDR-2R 52 23.6 108 48.9 140 63.5 169 76.7
SXDDR-3R 102 46.3 228 103.4 292 132.5 348 157.8
SXDDR-4R 192 87.1 484 219.5 655 297.1 753 341.7
SXDDR-8R 370 167.8 840 381.0 1200 544.3 1350 612.4
SXDDR-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
SXDDR-1R 32 14.5 76 34.5
SXDDR-2R 52 23.6 108 48.9
SXDDR-3R 102 46.3 228 103.4
SXDDR-4R 192 87.1 484 219.5
SXDDR-8R 370 167.8 840 381.0
SXDDR-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
SXDDR-1R 9.3 35.2
SXDDR-2R 13.2 50.0
SXDDR-3R 23.5 89.0
SXDDR-4R 52.4 198.4
SXDDR-8R 115.8 438.4
SXDDR-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
SXDDR-1R: 20” (50.8 cm)
SXDDR-2R: 20” (50.8 cm)
SXDDR-3R: 24” (61.0 cm)
SXDDR-4R: 34” (86.4 cm)
SXDDR-8R: 34” (86.4 cm)
SXDDR-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
SXDDRDDR-1R through SXDDRDDR-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)
SXDDR-1R: 3.53” (8.9)
SXDDR-2R: 3.53” (8.9)
SXDDR-3R: 3.56” (9.0)
SXDDR-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
SXDDR-1R 17.68” 44.9 16.21” 41.2 13.84” 35.2 3/4” NPT 3/4” NPT
SXDDR-2R 25.68” 65.2 16.21” 41.2 13.84” 35.2 3/4” NPT 3/4” NPT
SXDDR-3R 34.18” 86.8 20.46” 52.0 13.84” 35.2 1-1/2” NPT 1-1/2” NPT
SXDDR-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
SXDDR-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
SXDDR-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
SXDDR-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
SXDDR-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
7

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Installation & Location
Important: Remove all shipping brackets and materials
before operating the humidi¿er. Humidi¿er Àue gases
must be vented to the outside atmosphere. Power
supply disconnect switch must be in the oႇposition while
making wiring connections to prevent electrical shock
and equipment damage. All units must be wired in strict
accordance with wiring diagram furnished with this unit.
Turn oႇall gas while installing the supply gas piping and
¿eld installed manual gas shut-oႇvalve for the humidi¿er.
Location
The location selected must provide for electrical service,
cold or hot water supply, and sanitary drain.
When selecting a location, try to keep the humidi¿er within
10 feet (305 cm) of the duct to avoid unnecessary heat
losses and condensation within the steam supply line.
Visible “fog” will saturate and condense when it contacts
objects such as turning vanes, ¿lters, fans, elbows or take-
oႇs. The warmer the air, the more easily it will dissipate
the visible steam. The most active and warmest portion of
the duct will provide better mixing of the steam and air. The
injection tube should be mounted a minimum of 2 feet (61
cm) downstream from an elbow or other turbulent air Àow
area.
Avoid mounting single style injection tube(s) closer than
8-10 feet (244-305 cm) upstream of objects that could
become saturated and condense the steam (reference
the paragraph above). If the duct layout does not provide
a straight unobstructed run of 8-10 feet (244-305 cm), a
multiple injection tube system should be considered to
reduce the visible steam travel distance.
For Fast-Pac and Insty-Pac multiple tube assemblies
please consult factory for job speci¿c non-wetting
distances.
Reference Fast-Pac or Insty-Pac O&Ms for full installation
details.
CAUTION: Do not humidify upstream of ¿lters. Consult
factory.
CAUTION: Smoke detectors should not be located
downstream of injection tube assemblies.
Location of Controls
It is important to avoid mounting any controls within the
visible steam. The controls should be mounted a minimum
of 8-10 feet (244-305 cm) downstream from the humidi¿er
injection tube. Due to the temperature rise that exists
within the visible steam dissipation area, thermostats
should not be mounted near the injection tube.
High-limit humidistats should be installed before any duct
obstruction to make sure the humidi¿er is interrupted
before saturation can occur on the object. The high-limit
should be mounted a minimum of 8-10 feet (244-305 cm)
downstream from the injection tube. Installing the high-limit
closer than 8 feet (244 cm) from the humidi¿er may cause
erratic control.
8

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Mounting Applications
Support Legs
24” (61)
Above Floor
Steam Outlet Connection
Typical PURE Humidifier
SX Series Humidifier
Front View
Right Side
Support Legs attach to humidifier
front and back plate mounting
channels. Mounting hardware is by
PURE Humidifier Co.
Secure to floor (mounting
hardware by others)
Floor
Floor
1 1/4” x 1 1/4” x 1/4” Angle
Iron Support Legs (Painted
by PURE Humidifier Co.)
Typical 2
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Mounting Applications
Wall Brackets
Model
Dim. “A” Dim. “B”
inches cm inches cm
SXDDR-1R 30.50 77.5 16.75 42.6
SXDDR-2R 30.50 77.5 16.75 42.6
SXDDR-3R 34.75 88.3 21.00 53.3
SXDDR-4R Not recommended, see Note 4
SXDDR-8R Not recommended, see Note 4
SXDDR-12R Not recommended, see Note 4
NOTES:
1. Secure brackets to wall support studs. Attachment bolts must
be secured throught he wall stud.
2. On the SXDDR-1R & SXDDR-2R, a cross support (by others)
may be required to span between the wall studs.
3. Reference the humidifier schedule to verify which injection tube
system is to be provided.
4. Due to the operating weight, PURE Humidifier Co. does not
recommend wall mounting of the models: SXDDR-4R through
SXDDR-12R.
Optional Flexible Hose Kit
(for remote mounting of
humidifier injection tube)
Typical PURE Humidifier
SXDDR Series Humidifier
“B”
Secure brackets to the wall with
3/8”-16 UNC bolts through the
wall. See Note 4.
1.0” (2.5 cm)
Typical both
ends
“A”
Wall
Stud
Front View
Wall
Bracket
See Note #1
Cross Support (by
others) See Note #2
1 1/4” x 1 1/4” x 1/4” Angle
Iron Wall Brackets (Painted
by PURE Humidifier Co.)
Typical 2
Typical PURE Humidifier
SXDDR Series Humidifier
10

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Drain Pan Mounting
A drain pan is an additional safety feature which may be required to be supplied in the field. In a proper humidifier installation,
a drain pan is not required. However, if the humidifier and injection tube are located in an area that contains valuable
equipment or is a water sensitive area, PURE Humidifier Co. recommends the addition of a drain pan under the humidifier
and under the injection tube. The drain pan should extend past all edges of the humidifier and if installed in the duct, it should
extend a minimum of 3 feet (91 cm) downstream from the injection tube. The pan should be of a size which is capable of
draining at a rate of 3 gpm for units with a capacity of up 200 lbs/hr, and 5 gpm for units with a capacity over 200 lbs/hr. The
pan should be drained to a sanitary drain.
Drain Pan Mounting
11

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ALL DRAIN AND CONDENSATE PIPING MUST BE INSTALLED IN ACCORDANCE TO LOCAL PLUMBING CODES.
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.
Water Supply Piping
Supply pressure: 35-55 psi optimal
This style humidifier utilizes a float operated fill valve system which is designed for use with deionized, demineralized, or
reverse osmosis water. Use of mineralized tap water will cause fill valve failure and will void the humidifier warranty.
Install stainless pipe on make-up water line within 5 feet of humidifier fill valve connection. If plastic pipe is used beyond
this point a check valve is required to prevent steam from entering the plastic section in the event that the water treatment
system runs out of water.
Cold or hot deionized, demineralized, or reverse osmosis water can be supplied to the humidifier. A minimum water pressure
of 35 psi (2.4 Bar) should be maintained to provide the proper water level within the humidifier. If the water pressure is above
55 psi (3.8 Bar), the valve may not shut off.
Lower pressure than optimal will require adjustment of float valve and may not supply sufficient water for proper operation.
Drain Piping
A water seal as shown in the piping illustration should be installed to prevent steam from escaping through the drain line.
The water seal should be of sufficient height to overcome the pressure developed in the humidifier (reference water seal
height table) and the duct static pressure.
The drain piping should be stainless steel. The use of PVC piping is not recommended; the humidifier temperature will
cause the PVC to soften and fail.
If gravity drain is not possible please use a condensate pump rated for 212°F water or contact a PURE Humidifier Co.
Representative to purchase one.
Local codes may require tempering of 212°F (100°C) water before entering drain. The PURE Humidifier Co. DCT-927 Drain
Tempering Kit will temper water to 140°F (60°C).
Water Supply & Drain Piping
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NOTES
1. All drain piping is by others.
2. Drain and overflow connection requires field piping.
3. Do NOT use PVC or other plastic piping that is not rated for 220°F or higher.
† This model is typically supplied with non-potable water. However, a backflow preventer may still be needed to prevent
contamination of the attached water system.
Piping
Drain Piping
Water Seal Height Δ
Capacity “H”
lbs/hr kg/hr inches cm
Up to 60 Up to 27.2 8” 20
61-99 27.2-45.0 11” 28
100-150 45.4-68.0 17” 43
151 & above 68.5 & above 19” 48
ΔThe water seal height may have to be increased if excessive
duct static pressure exists.
3/4” SW Copper
Drain Connection
Steam Outlet
Connection
Open Sanitary Drain
“H”
Water Seal
SIDE VIEW
1/4”-NPT Water Inlet
Connection †
Heat Exchanger
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PIPING NOTES
1. Do not install piping across the front of the heat exchanger.
2. Dashed line piping is by others.
3. Do not use PVC or plastic piping for any of the piping connections to the humidifier.
4. A shut-offvalve must be installed in the steam supply line prior to the wye strainer (valve by others).
5. See Clearances & Mounting page for humidifier and heat exchanger clearance dimensions.
Steam & Condensate Piping
SXDDR-1R through SXDDR-4R
Water Supply Line
Vacuum Breaker
(by others)
Control Valve
Pneumatic Actuator Shown
(by PURE)
Wye Strainer
(by PURE)
Steam Supply Line
Shut-OffValve
(by others)
Condensate Steam
Trap (by PURE)
Non-Pressurized
Condensate Return Line
or
Open Drain
(Do NOT elevate)
Open Drain
3/4” SW Reservoir
Drain Connection Heat Exchanger
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PIPING NOTES
1. Do not install piping across the front of the heat exchanger.
2. Dashed line piping is by others.
3. Do not use PVC or plastic piping for any of the piping connections to the humidifier.
4. A shut-offvalve must be installed in the steam supply line prior to the wye strainer (valve by others).
5. See Clearances & Mounting page for humidifier and heat exchanger clearance dimensions.
Steam & Condensate Piping
SXDDR-8R
Water Supply Line
Vacuum Breaker
(by others, Typ. 2)
Control Valve
Pneumatic Actuator Shown
(by PURE, Typ. 2)
Wye Strainer
(by PURE, Typ. 2)
Steam Supply Line (Typ. 2)
Shut-OffValve
(by others, Typ. 2)
Condensate Steam Trap
(by PURE, Typ. 2)
Non-Pressurized
Condensate Return Line
or
Open Drain
(Do NOT elevate)
Open Drain
1” NPT Reservoir
Drain Connection Heat Exchanger (Typ. 2)
15

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PIPING NOTES
1. Do not install piping across the front of the heat exchanger.
2. Dashed line piping is by others.
3. Do not use PVC or plastic piping for any of the piping connections to the humidifier.
4. A shut-offvalve must be installed in the steam supply line prior to the wye strainer (valve by others).
5. See Clearances & Mounting page for humidifier and heat exchanger clearance dimensions.
Steam & Condensate Piping
SXDDR-12R
Water Supply Line
Vacuum Breaker
(by others, Typ. 3)
Control Valve
Pneumatic Actuator Shown
(by PURE, Typ. 3)
Wye Strainer
(by PURE, Typ. 3)
Steam Supply Line (Typ. 3)
Shut-OffValve
(by others, Typ. 3)
Condensate Steam Trap
(by PURE, Typ. 3)
Non-Pressurized
Condensate Return
Line
or
Open Drain
(Do NOT elevate)
Open Drain
1” SW Reservoir
Drain Connection Heat Exchanger (Typ. 3)
16

Pitched Towards Steam Generator
TM
Steam Supply Piping Examples
Notes:
1. Pitch hard piping or Àexible hose 2” per foot if steam is Àowing uphill, ¹»๞” per foot if the steam is Àowing
downhill. Reference piping examples shown.
2. When feasible to do so, install a minimum one-foot riser from the top of the tank to reduce condensate carryover.
3. Use Àex connectors or unions to allow for easy removal of cover.
4. Support Àexible hose every 18” to avoid sagging.
5. Hard piping or Àexible hose must match reservoir outlet size. Do not use supply piping with a smaller inside diameter
than the reservoir outlet.
6. Failure to follow the piping recommendation on this page may result in blown water seals, leaking cover gasket, or
dispersion tubes spitting.
7. Install a Drain Tee at any low spots in supply piping run where condensate will accumulate. All horizontal to vertical
up transitions require a water-sealed drip leg.
8. Reference job speci¿c tube assembly O&M included with your order for complete details.
Pitched Towards Tube Assembly
Pitched Towards Steam Generator
and Tube Assembly
Pitched Towards Drain Tee
Pitch
(see Note 1)
Use two 45° elbows for
hard piping or wide 90°
for Àexible steam hose
Supply piping
connectors
(see Note 4)
Drain Tee
(see Note 7)
Typical
Humidi¿er
Reservoir
see Note 2
see Note 2
see Note 2 see Note 2
2”/1’
2”/1’ 2”/1’
¹»๞”/1’
¹»๞”/1’
¹»๞”/1’
17