Pure Humidifier EC Series Operation and maintenance manual

TM
READ AND SAVE THESE INSTRUCTIONS
Standard Water
EC Series
Electric Humidifier
Installation Instructions
Operation and Maintenance Manual
Our results are comforting
PURE HUMIDIFIER® and INTAC® are registered trademarks of PURE Humidifier Co.
Form No: ECOM-4-2023

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Introduction
Introduction
Capacity & Electrical Specifications
Dimensions & Layout
Humidifier Layout
Installation & Location
Wall Mounting Detail
Dispersion Methods
Injection Tube & Flexible Hose Kit Installation
Steam Supply Piping Examples
Piping
Blower Pack
Pre-Startup Checklist
Non-INTAC®PLC Startup Procedure
INTAC®PLC Startup Procedure
Maintenance & Cleaning Instructions
Cover Gasket Replacement Instructions
Troubleshooting
Tool Requirements & Torque List
Maintenance Notes
Exploded Parts Drawing
Parts List
1
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
21
22
To the user of PURE Humidifier Co.’s Electric Humidifiers
We at PURE Humidifier Co. thank you for choosing one of our
quality products. PURE Humidifier Co. Electric 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 EC Series Humidifier utilizes a Tri-Probe Sensor conductive-
type water control system, which is designed for use with standard
(hard or soft) tap water. Use of deionized, demineralized, 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 ECDDR Series should be installed on
applications that require deionized, demineralized, 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 panel
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 use only.
Table of Contents
The PURE Humidifier Co. Warranty
PURE Humidifier Co. guarantees its products to be free from
defects in material and workmanship for a period of two years from
the date of shipment; provided the product is properly installed,
serviced, and put into the service for which it was intended.
PURE Humidifier Co. is obligated under the terms of this warranty
to the repair or replacement of the defective part(s), excluding any
labor charges, or to refund the purchase price at our option. PURE
Humidifier Co. assumes no obligation for incidental or consequential
damages. The above provisions are in lieu of all other guarantees,
obligations, liabilities or warranties, expressed or implied.
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Capacity, Weights &
Electrical Specifications
* EC-5 at 120/1 requires 3 heating elements.
† The above capacities are based on 100% efficiency. 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 humidifier reservoir.
Capacity & Weights
EC Series
Electrical Specification
EC Series
Standard
Water Unit
Model No.
Steam Output Capacity † Humidifer Weight
lbs/hr kg/hr Empty Full
lbs kg lbs kg
EC-5 15.0 6.8 139.0 63.1 223.0 101.2
EC-10 30.0 13.6 140.0 63.5 224.0 101.6
EC-15 45.0 20.4 141.0 64.0 225.0 102.1
EC-20 60.0 27.2 142.0 64.4 226.0 102.5
EC-25 75.0 34.0 143.0 64.9 227.0 103.0
EC-35 102.0 46.3 146.0 66.2 230.0 104.3
Standard
Water Unit
Model No.
KW
Single Phase Amperage Three Phase Amperage CONTROL
CIRCUIT
VOLTAGE
No. of
Heaters 120V 208V 240V 480V 600V
No. of
Heaters 208V 240V 480V 600V
EC-5 5 Single 41.7* 24.0 20.8 10.4 8.3 Triple 13.9 12.0 6.0 4.8 24 vac
EC-10 10 Double 41.7 20.8 16.7 Triple 27.8 24.1 12.0 9.6 24 vac
EC-15 15 Triple 31.3 25.0 Triple 41.7 36.1 18.1 14.4 24 vac
EC-20 20 Triple 41.7 33.3 Triple 24.1 19.2 24 vac
EC-25 25 Triple 41.7 Triple 30.1 24.1 24 vac
EC-35 34 Triple Triple 40.9 32.7 24 vac
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Dimensions & Layout
*Removable access plate allows reservoir to slide out
for inspection and cleaning without disconnecting the
steam supply piping.
**See local codes for minimum clearance to
electrical compartment. The electrical access
door requires a minimum clearance of 16” to fully
open.
Key Locked Electrical
Access Door**
Removable
Access Plate*
Removable Key Locked
Reservoir Access Door Touchscreen/
Operation Status
Indicating Lights
Key Locked
Electrical Access
Door
FRONT VIEW
RIGHT SIDE VIEW
BOTTOM VIEW
Note: Dimensions are typical for all EC models.
R
Rem
o
v
ab
l
e
A
A
A
Acc
ess
Pl
a
t
e*
TOP VIEW
17.00”
(43.2)
7.75”
(19.7)
2 3/8” Steam
Outlet Access
14.75”
(37.5)
16”
(40.6)
29.50”
(74.9)
24”
(60.9)
6.50”
(16.5) 2.375”
(6.0)
Reservoir Drain Outlet
1 7/8ӯ
15.00”
(38.1)
8.4375”
(21.4)
2.00”
(5.1)
1.50”
(3.8)
Electrical Inlet 1 1/8ӯ
Water Inlet 3/8” NPT
Cabinet Overflow
1/2” NPT
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Humidifier Layout
Humidifier Features
• SCR modulating control
• Electronic water level control system
• Accumulative automatic timed drain system
• Seasonal end-of-use drain system
• High efficiency incoloy immersion water heaters
• 18-gauge steel cabinet with baked enamel paint finish
• Internal stainless steel evaporating reservoir mounted
on slides for easy removal
• Key locked doors for both reservoir and electrical
access
• Easy and simple installation options
• Dispersion methods include Insty-Pac*, Fast-Pac,
Injection Tube*, or Blower Pack assembly* for room
distribution
• Manual reset over-temperature safety switch
• INTAC®PLC control system
• VAV dual modulating control system*
* Optional features
Touchscreen/
Operating Status
Indicating Lights
Steam Outlet
Connection
Over-Temperature
Switch
Removable
Humidifier
Cover
Removable
Humidifier
Reservoir
Immersion
Heaters
Tri-Probe
Sensor
1/4”-IPS Water
Inlet & Strainer
Removable Key Locked
Reservoir Access Door
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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.
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Mounting
The humidifier should be mounted dead level in both directions. PURE Humidifier Co. supplies a wall mounting bracket.
Bracket is mounted to wall studs first. The bracket must be mounted to wall studs or additional support must be provided in
the field. EC cabinet is then hung on slip-fit bracket.
Wall Mounting Detail
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Injection Tube and Flexible Hose Kit
Allows remote mounting of the humidifier reservoir
from the duct. Also allows the humidifier to be located
below a wall-mounted duct. See page 8 for details.
Dispersion Methods
Insty-Pac and Fast-Pac
Multiple Injection Tube Assemblies
For applications where you need a short dissipation
distance. Allows remote mounting of the humidifier
reservoir from the duct. Also allows the humidifier to
be located below a wall-mounted duct. See page 9
for details.
Blower Pack for Direct Room Humidification
Allows humidifier to be mounted directly on the wall
within the space to be humidified. See page 11 and
12 for details.
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Flexible Hose Kit Installation
Hose kits should have the injection tube installed
in the center of the duct. Hose and injection tube
should be pitched back to the humidifier two
inches (5 cm) per foot (31 cm). If proper pitch
cannot be maintained, or the injection tube is
mounted lower than the humidifier, a drain “tee”
will be required (reference drain “tee” illustration).
Install the tube with the steam ports injecting
steam up. NOTE: If narrow ducts (6”/15 cm or
less, in height) are utilized, install the tube with
the steam ports injecting slightly with the air flow
(2 o’clock position).
The hose connects to the injection tube and
humidifier with stainless steel hose clamps (by
PURE Humidifier Co.).
Galvanized steel duct plates are provided to seal
the opening where the tube enters the duct.
Injection Tube & Flexible Hose
Installation
The water seal height may have to
be increased if excessive duct static
pressure exists.
Δ
Typical EC Series
Electric Humidifier
3/4” SW Condensate
Drain Line (by others)
Stainless Steel
Drain Tee
(optional)
Duct (beneath
humidifier)
Open Sanitary
Drain
“H”
Water
Seal
Height
Total KW
5 thru 20
21 thru 34
“H”
6” (15 cm)
8” (20 cm)
Water Seal Height Δ
Flexible Hose
Typical EC Series
Electric Humidifier
Flexible Hose
Pitch 2” (5 cm) per foor (31 cm)
back to the humidifier.
Duct Plate
Duct
Injection Tube
Pitch 2” (5 cm) per foor (31 cm)
back towards the humidifier.
8”
4” Insertion Length/
Duct Width
1 1/2” Ø
Tube Detail
8

Pitched Towards Steam Generator
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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’
9