Honeywell TrueSTEAM HM612A1000/U User manual

J
TM
69-2285-11
Steam Humidifier
PROFESSIONAL INSTALLATION GUIDE
INCLUDED IN THIS HUMIDIFIER BOX
Remote installation requires separate purchase of the
Honeywell Remote Mounting Kit (#50024917)
Tools needed to install Steam Humidier
Wire cutter/stripper
1-3/4-in. diameter hole saw
1/8-in. drill bit
Standard screwdriver
18-gauge wire (up to 5 conductor)
Torx driver T-20 and T-30
Other Requirements
Steam Humidifier flushes water at or above 140°F (60°C).
Refer to local codes for proper draining practices
for hot water.
Condensate pump rating of 212°F (100°C) if used.
Drip pan with water sensor shut-off required underneath
Steam Humidifier if installed in or above finished space.
Steam Humidifier
Mounting bracket and hardware
Backflow preventer
Saddle valve
EWater supply hose
FDrain hose (10 feet)
GDuct nozzle and gasket
HOwner’s manual
IService label
JHumidiPRO Digital Control
KHose clamp
LWater Hardness Test Kit
MRO Filter System
*RO Tank not needed with installation
E
H
F
K L
I
G
GETTING
STARTED MOUNTING PLUMBING WIRING APPENDICES
OPERATION
AND SERVICE
M*

Steam Humidier
?
Steam Humidier System 69-2285—11 1
GETTING
STARTED MOUNTING PLUMBING WIRING APPENDICES
OPERATION
AND SERVICE
NEED HELP? For assistance with this product please visit http://yourhome.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502.
Read and save these instructions.
® U.S. Registered Trademark. Patents pending. Copyright © 2014 Honeywell International Inc. All rights reserved.
Critical Installation Information ................................2
Water Quality and Hardness ...............................................2
Testing Water Quality and Interperting Results....................2
Choosing the Filter...............................................................2
Set the Automatic Flush Cycle Timing .................................3
Proper Sizing of a Steam Humidier Humidier ..................5
Steam Humidier Pre-Install Information .............................7
Safety Denitions and Precautions ..........................8
Safety Denitions................................................................ 8
Safety Precautions.............................................................. 8
Setting Homeowner Expectations ............................9
Important Installation Requirements......................10
Personal Safety .................................................................10
Mounting Location ............................................................10
Duct Nozzle ......................................................................10
Water Drainage .................................................................10
Choosing a Mounting Method.................................11
Which is right for you? .......................................................11
Duct Mounting ..........................................................12
STEP ONE: Select a Mounting Location ...........................12
STEP TWO: Connect the Duct Nozzle...............................12
STEP THREE: Install Mounting Bracket to the Duct ..........13
STEP FOUR: Install Steam Humidier onto the
Mounting Bracket ...............................................................13
Water Supply and Drain Connections ....................14
STEP ONE: Connect the Cold Water Supply.....................14
STEP TWO: Tap into a Water Line.....................................14
STEP THREE: Connect Steam Humidier to the
Cold Water Pipe.................................................................15
STEP FOUR: Connect to the Water Drain .........................15
Other Plumbing Options..........................................17
For All Options Shown: ......................................................17
Connect to Steam Humidier.............................................17
Remote Installation ..................................................20
Proper Hose Installation..........................................22
Reverse Osmosis Filter ...........................................25
Parts of the RO Filter .........................................................25
Setting up the RO Filter ....................................................26
Maintaining the RO Filter ..................................................27
Before Wiring Steam Humier.................................28
Using the DIP Switches .....................................................28
STEP ONE: Remove the Steam Humidier Cover.............28
STEP TWO: Understand the DIP Switches........................28
Deciding on the Wiring Conguration....................30
STEP ONE: Make Power Monitoring Decision...................30
STEP TWO: Make System Fan Regulation Decision.........32
STEP THREE: Make Add-On Air Proving Decision ...........34
Using the Terminals ...........................................................35
Routing the Wires ..............................................................35
Using the Correct Control Diagram ........................36
Mounting the Outdoor Sensor ................................39
Startup and Checkout ..............................................44
Routine Maintenance ...............................................45
Automatic Cleaning Cycle..................................................45
STEP ONE: Initiate a Flush Cycle .....................................45
STEP TWO: Remove the Water Tank.................................47
STEP THREE: Clean the Tank...........................................48
STEP FOUR: Replace the Water Level Sensor .................48
Water Level Sensor Troubleshooting Steps...........49
Test Setup..........................................................................49
Test Pins ............................................................................49
Testing for Shorts...............................................................49
Good Water Sensor ...........................................................49
Bad Water Sensor..............................................................49
STEP FIVE: Reinstall the Tank .........................................50
Troubleshooting .......................................................51
A: Specications ......................................................55
B: Advanced Steam Humier Wiring ....................56
C: Parts List ..............................................................67

GETTING
STARTED
Water Quality and Hardness
Proper ltration is critical for the operation of the steam humidier. Failure to address water quality will lead to
increased maintenance requirements and possible failure of the steam humidier and its components. Be sure to
complete the following procedure well in advance of installation to ensure any additional costs are documented
and understood.
It is imperative to fully understand the quality and hardness of the water that will be used on each individual steam
humidier. Water quality and water hardness can vary greatly from home to home, and even between two homes
on the same street. Water test kits are included with every steam humidier and are also available for purchase
separately (50044721-001). Proper use of these kits will help determine which ltration option is right for each
particular installation.
Testing Water Quality and Interpreting Results
• The color block will recommend the best water ltration method for the home.
• Water test strips will be green when new.
• Honeywell always recommends installing a reverse osmosis lter.
Fill the plastic tube with water directly from the
steam humidifier input water source.
Note: It is important to test the specific input to steam
humidifier, as it may differ from the faucet taps in the home.
Dip the colored end of one of the test strips into
the tube’s water for 3 seconds.
Remove the test strip. Do not shake the strip.
Wait 20 seconds and then match the test strip’s
color to the closest color block on the water
hardness scale.
Note: Strip color results are no longer valid after one minute.
MCR35268
A
1
2
4
3
RANGE 1
RANGE 2
Water
Softener
RO Filter Part No.
HM600XROF1
Honeywell
Recommends
Choosing the Filter
If the water tests in range 2 then the steam humidier will require the use of a whole-house water softener for
optimal performance. Failure to use softened water in this situation can potentially lead to drastically increased
maintenance requirements and premature failure of the steam humidier and its components. Water hardness in
this range negatively affects all facets of a home including shower heads, faucets, laundry machines (as well as
steam humidier).
Critical Installation Information
Steam Humidier System 69-2285—11
2

GETTING
STARTED
Set the Automatic Flush Cycle Timing
• Use DIP 1 and DIP 2 to congure how often steam
humidier will automatically ush the tank.
Timing for the automatic ush is based on hours of
active heating element time.
• The home’s water hardness determines how often
automatic ushing should be performed.
• The automatic ush timing can be changed any
time after installation by setting the DIP 1 and
DIP 2 positions, as shown at left. See “Automatic
Cleaning Cycle” on page 45 for a description of
the automatic ushing process.
If water hardness is in range 1:
Honeywell recommends using the RO Filtration
system
Proceed to “Water Supply and Drain
Connections” on page 14. See “Reverse
Osmosis Filter” on page 25 to install the lter.
M29661
65432
On
Off
1
654321
654321
654321
On
Off
On
Off
For water that is filtered through
the Honeywell RO Filter System.
(30 hour flush)
For hard water without
a softener or filter.
(8 hour flush)
For water that is put through
a softener before
entering steam humidifier.
(20 hour flush)
For soft water without
a softener or filter.
(12 hour flush)
On
Off
M29614A
65432
On
Off
1
654321
654321
654321
On
Off
On
Off
For water that is filtered through
the Honeywell RO Filter System.
(30 hour flush)
For hard water without
a softener or filter.
(8 hour flush)
For water that is put through
a softener before
entering steam humidifier.
(20 hour flush)
For soft water without
a softener or filter.
(12 hour flush)
On
Off
M29614A
65432
On
Off
1
654321
654321
654321
On
Off
On
Of
f
For water that is filtered through
the Honeywell RO Filter System.
(30 hour flush)
For hard water without
a softener or filter.
(8 hour flush)
For water that is put through
a softener before
entering steam humidifier.
(20 hour flush)
For soft water without
a softener or filter.
(12 hour flush)
On
Off
M29614A
Steam Humidier System 69-2285—11 3

GETTING
STARTED
While the steam humidier and its available ltration options help to address the issue of water quality and
hardness, homes with extreme hard water problems should consider using a whole house water softener as
the primary ltration device. Use of a whole house water softener will help protect the humidier from excessive
maintenance requirements as well as undue wear and tear in homes with hard water.
In applications with a water softener, it is critical for the steam humidier to draw its water supply from the cold
water line after the water softener.
Note: Be sure to check all local plumbing codes before beginning installation.
M35265
Furnace
Water
Heater
Cold softened water
Water
Softener
Hard water source
Steam humidifier draws water
from cold water line after whole
house water softener
BEST
PRACTICE
Use Steam Humidier with water that is less than 1 grain
per gallon hardness. A properly functioning water softener
will accomplish this.
Steam Humidier System 69-2285—11
4

GETTING
STARTED
Proper Sizing of a Steam Humidier
The Air-Conditioning, Heating and Refrigeration Institute (AHRI) has set guidelines for determining humidication
capacity requirements. The recommendation is based on the cubic footage (volume) and type of home
construction – assuming typical conditions. It is important to realize many homes will have humidication
requirements that differ from the guidelines depending on how the circumstances differ from standard conditions.
Factors that impact the amount of humidity needed:
• Geographic Area
• Elevation
• Ventilation type
• Number of people living in the home
• Ceiling height (i.e. cubic volume)
• Window type (i.e. structure type)
• Insulation type (i.e. structure type)
• Equipment type
Converting square footage to cubic volume requires multiplying the square footage by the ceiling height (i.e. 2000
square foot space with 10 foot ceilings is 20,000 cubic feet). In general, the higher the ceilings, the smaller the
square footage space each steam humidier will cover since it must humidify the additional air volume.
AHRI denes structure type as follows:
• Tight construction: Well insulated with vapor retarders, tight storm doors, windows with weather stripping,
dampered replace, and using ½ air change per hour of air inltration.
• Average construction: Insulated with vapor retarders, loose storm doors and windows, dampered replace
with 1 air change per hour of air ltration.
• Loose construction: Generally built before 1930 with little or no insulation, no storm doors, no insulated
windows, no weather stripping, no vapor retarders, undampered replace, and with 1-1/2 air changes per hour
of air inltration.
It is vital to take all of these factors into account when sizing a steam humidier for a particular home. Undersizing
the humidier will not only reduce the potential to meet the a desired humidity set point, it may also lead to
extensive system fan run time or higher operating costs as the system tries to deliver to the control’s setting. While
oversizing the humidier may lead to higher amp draw, the system run time will be less, which in some situations
may be less expensive at the bottom line.
Steam Humidier System 69-2285—11 5

GETTING
STARTED
Proper Sizing of a Steam Humidier
Converting square footage to cubic volume requires multiplying the square footage by the ceiling height
(i.e. 2000 square foot space with 10 foot ceilings is 20,000 cubic feet). In general, the higher the ceilings, the
smaller the square footage space each Steam Humidier will cover since it must humidify the additional air
volume.
INCLUDE ALL SQUARE FOOTAGE OF THE HOME, FINISHED AND UNFINISHED.
Example 1: 2000 sq ft home: 8 ft ceilings = 16,000 cu ft. (2000 x 8)
Example 2: 2000 sq ft home: 10 ft ceilings = 20,000 cu ft. (2000 x 10)
Example 3: 2000 sq ft home: ½ with 8 ft ceilings, ½ with 12 ft ceilings. = 20,000 cu ft. ((1000 x 8) + (1000 x 12))
INCLUDING CEILING HEIGHT, FINISHED AND UNFINISHED SPACE WILL PROVIDE A MORE ACCURATE
SIZING FOR HUMIDIFICATION.
AHRI
Recommended
Humidity
(Gallons Per Day)
Construction Type 8,000 CU FT 12,000 CU FT 16,000 CU FT 20,000 CU FT 24,000 CU FT 28,000 CU FT 32,000 CU FT
Tight 3.3 4.3 5.4 7.5 9.6 11.7 16
Average 7.6 9.6 11.8 16 20.3 24.4 33
Loose 11.7 14.9 18.1 24.5 30.8 37.1 50
Recommended
Steam
Humidier
Construction Type 8,000 CU FT 12,000 CU FT 16,000 CU FT 20,000 CU FT 24,000 CU FT 28,000 CU FT 32,000 CU FT
Tight 9 GPD 9 GPD 9 GPD 9 GPD 12 GPD 9 GPD X2 12 GPD X2
Average 9 GPD 12 GPD 9 GPD X2 9 GPD X2 12 GPD X2 12 GPD X3 12 GPD X3
Loose 12 GPD 9 GPD X2 12 GPD X2 12 GPD X3 12 GPD X3 12 GPD X4 12 GPD X4
Steam Humidier System 69-2285—11
6

GETTING
STARTED
In the event that a service technician needs to call in to the steam humidier support techline, the following
information is typically required for the Honeywell tech support specialist to accurately evaluate each situation.
Failure to have this information ready may result in resolution delays or a potentially incomplete diagnosis.
Honeywell recommends completing the below questionnaire and leaving a copy
behind at the home along with the Steam Humidier installation guide with every steam
humidier installation.
Honeywell steam humidier techline: 800-814-9452
Steam Humidier Pre-Install Information
Model Number of Steam Humidier Unit
Date Code (xxxx)
Water Quality Test 1 2 3 (circle one)
Water Pressure Test (psi)
Flush Cycle Setting DIP 1 OFF ON OFF ON (circle one)
DIP 2 OFF ON ON OFF (circle one)
Duct Static Pressure Test (in.wc.)
(Maximum static pressure is 0.5 in.wc.)
Condensate Pump or Drain Pump Drain (circle one)
If Drain - PVC or Standard PVC Standard N/A (circle one)
Supply Voltage to Unit (V)
Monitoring Air Flow/System Power/
None
DIP 4 ON OFF (circle one)
DIP 5 ON OFF (circle one)
Control - Wireless or Wired Wireless Wired (circle one)
Fan Control - Steam Humidier or
Controller Steam Humidier Controller (circle one)
Other (any additional relevant
information)
BEST
PRACTICE Complete this information sheet and leave on all jobsites
Steam Humidier System 69-2285—11 7

GETTING
STARTED
Safety Denitions and Precautions
Safety Denitions
These safety terms identify information you must read.
CAUTION: Indicates a hazardous situation which, if not avoided, could cause bodily injury
or property damage.
WARNING: Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Safety Precautions
CAUTION: Voltage Hazard.
Can cause electrical shock or equipment damage.
Disconnect HVAC equipment before beginning installation.
WARNING: Electrocution, Heavy Equipment, and Water Hazard.
Can cause death, blindness, and water damage to home, and heating element failure.
CAUTION: Steam Condensation, Fire, and Freezing Water Hazard.
Can cause failure of fan or limit control or result in water damage to home.
Make sure you read and understand the following safety hazards before installing, using, or working
with the steam humidier:
• Do not direct the steam nozzle at people.
• Water inside tank can be very hot. Explain this to homeowner and emphasize the warning label
on steam humidier.
• Scalding danger from draining water. When the water tank drains, the water can be hot enough to cause
injury. Make sure the homeowner understands the danger of hot water and steam.
Steam Humidier System 69-2285—11
8

GETTING
STARTED
Make sure the homeowners know what to expect from their steam humidier. Discuss the following points with the
homeowners and answer any questions they have.
• Achieving Humidity Setpoint. It may take up to a week of continuous operation to achieve the humidity
setpoint. This depends on such factors as weather, size of home, furnishings in the home, and insulation.
• Plastic or Rubber Odor. At startup, it is normal to smell a slight plastic odor in the home. If the remote hose is
used, there may be a slight rubber odor. These odors will go away within a few days.
• Ideal Humidity. 35% relative humidity in typical winter weather is considered ideal by industry experts.
Homeowners can adjust to their own comfort or until there is condensation on the windows. Lower the setpoint
if condensation appears.
• Unit Not Humidifying. If steam humidier is not running but the humidity is below the setpoint, the humidity
control may have a frost protection setting. Steam humidier will not humidify while in a drain cycle mode.
• Setpoint Not Reached. If humidity doesn’t reach the setpoint, steam humidier may be undersized for the
home. This can be due to factors such as insulation, windows, and arid climate. Also, the outdoor temperature
may be too low to maintain the humidity level. Wait for the outdoor temperature to warm closer to 20°F (-6°C). If
the desired humidity is still not reached, then a larger capacity steam humidier may be needed.
• Home Ventilation. Excessive ventilation sends moist air outside and replaces it with dry air. This can make it
hard to maintain the humidity setpoint. If installing a ventilator, use a solution that retains moisture. An Energy
Recovery Ventilator (ERV) is recommended.
• Cleaning Required Light. If the Cleaning Required light is on, clean steam humidier using the steps found in
the “Routine Maintenance” section on page 45, or in the Homeowner’s Operating Manual. Steam Humidier
will continue to run normally while this light is on.
• Hard Water. The home’s water hardness determines how often steam humidier must be cleaned. A water
hardness test kit is provided with your steam humidier. It will help you determine the cleaning interval and
lter requirements for your steam humidier.
• Energy Consumption. There may be a slight increase in overall energy consumption when operating
any humidier. However, steam humidier will make the home feel warmer. This allows the homeowner to lower
the temperature setting on the thermostat. Every degree lower on the thermostat can save up to 3% on
heating costs.
Setting Homeowner Expectations
Steam Humidier System 69-2285—11 9

GETTING
STARTED
Personal Safety
• Wear safety glasses while installing steam humidier.
• Do not cut into any air conditioning or electrical line.
• Follow professional safety standards and all local regulations.
Mounting Location
• Mount steam humidier in a level position to avoid water damage or heating element failure.
• Install steam humidier on the supply duct. Use the Remote Mounting Kit if duct mounting is not possible.
• Do not install steam humidier where the ambient temperature is lower than 34°F (1.1°C) or higher
than 104°F (40°C).
• Mounting area must be strong enough to support steam humidier’s weight when full of water (up to 15 lbs.).
• Choose a location that is well ventilated. Do not install steam humidier in completely enclosed spaces, such
as a cabinet or unventilated closet.
• Allow at least 1 foot clearance to ventilation holes in the steam humidier cover. Do not cover the holes.
Covering them can increase the temperature inside steam humidier and shorten its life.
• Do not mount directly to duct board. The remote mount nozzle attachment is allowed only with a Honeywell
duct board adapter kit. See “Appendix C: Parts List” on page 67.
• If used near a pool or spa, make sure steam humidier can not fall into the water or be splashed. Also, ensure
steam humidier is plugged into a ground fault interrupted (GFI) outlet.
Duct Nozzle
• Do not install the duct nozzle into a supply duct with static pressure exceeding 0.5 in. w.c.
• Do not install the duct nozzle through wooden sidewalls (e.g., oor joist).
• If the duct has exposed insulation on the interior, be sure the nozzle extends beyond the insulation. Clear away
excess insulation at the insertion point, or replace a section of insulated duct (approximately 6 in. x
6 in.) with rigid, non-insulated sheet metal.
• Allow at least 4 in. clearance between nozzle outlet and any interior duct to avoid water condensation.
• Mount steam humidier where the nozzle outlet has a minimum 24 in. of downstream open air space.
Water Drainage
• Consult local plumbing codes for drain size, material, and maximum temperature allowed.
Important Installation Requirements
Failure to comply with these requirements will result in voided warranty, improper installation, and
service callbacks.
Steam Humidier System 69-2285—11
10

MOUNTING
Choosing a Mounting Method
Before installing steam humidier in a home, you must decide which mounting method you want to use:
Which is right for you?
This manual covers duct mounting of steam humidier. For Remote Mounting Instructions, see “Remote
Installation” on page 20 or “Document 69-2317” (included with Remote Mounting Kit).
Steam Humidier System 69-2285—11 11
DUCT MOUNTING – if you can mount steam
humidier onto the supply duct of
the HVAC system:
• The generated steam goes directly into the
supply duct.
• This is the simplest type of installation, but
it requires that a suitable mounting location
can be found on the supply duct.
Return
Supply
MCR29596
REMOTE MOUNTING – if a suitable
mounting location can not be found
on the supply duct:
• The steam humidier can be mounted up to
20 feet away from the supply duct for
select models.
• A remote hose must be installed to carry
steam from steam humidier to the supply
duct.
• You will need to use a remote mounting kit
(see “Appendix C: Parts List” on page 67).
Supply
MCR35264
Before proceeding:
I have decided to use: Duct Mounting Remote Mounting

MOUNTING
Duct Mounting
Before beginning Duct Mounting:
I have conrmed local codes for proper draining practices for hot water
I have chosen an installation location that meets the requirements on page 10
Follow these steps to mount steam humidier directly to the supply duct of the homeowner’s HVAC equipment.
STEP ONE: Select a Mounting Location
Choose a location that has access to a cold
water supply pipe.
Select a vertical or horizontal surface on the HVAC
supply duct, with adequate clearances, where steam
humidier can be mounted.
Make sure there is a 120 VAC electrical outlet
rated for the steam humidier being installed.
Ensure the location is near a drain with a high-
temperature water rating. Consult local plumbing
codes for proper drainage. If no main oor drain is
available, see “Other Plumbing Options” on page 17.
STEP TWO: Connect the Duct Nozzle
Make sure the o-ring gasket is properly seated
in the groove.
Insert the duct nozzle into steam humidier. Twist
clockwise to ensure a tight seal.
Slide the foam gasket over the nozzle.
M29598
M29599
Steam Humidier System 69-2285—11
12
Steam Humidier Required Minimum
Circuit Capacity:
HM609 10 Amps
HM612 12 Amps
1
4
2
2
3
1
3

MOUNTING
Before proceeding to Plumbing:
I selected a duct mounting location
I connected the duct nozzle
I installed the mounting bracket to the duct
I installed the steam humidier onto the mounting bracket
Steam Humidier System 69-2285—11 13
STEP THREE: Install Mounting Bracket to the Duct
Position the template on the supply duct:
• Make sure the template is level and in the desired
position on the duct.
• Ensure proper clearances from A-coil.
• Make sure the duct nozzle will have proper
clearances from duct walls.
• Minimum 4-inch clearance from nozzle outlet to any
duct wall.
• Minimum 24 inches of downstream open duct air
space. (Needed to prevent water condensation.)
Drill the 1-3/4 inch hole.
Secure the mounting bracket to the duct, using four
self-drilling sheet metal screws provided.
STEP FOUR: Install Steam Humidier onto the Mounting Bracket
Make sure the foam gasket is positioned correctly over
the nozzle.
Lift steam humidier into place against the mounting
bracket. Insert the nozzle directly into the duct hole.
Check the foam gasket – it must form a tight seal in
the duct hole.
Push down to secure steam humidier to the bracket
arms.
Flow
4”
24”
(mín)
4” 4”
M29600A
M29601A
2
3
1
3
2
1
4

PLUMBING
STEP ONE: Connect the Cold Water Supply
Do not use hot water supply. Cold water is required
to cool boiling water to safe draining temperatures.
Insert one end of the water line into the water lter
or reverse osmosis kit. Use the 1/4-inch plastic
water line provided. Apply a modest pull to ensure
a tight t.
Use clamps or ties to secure the water lter in a
location that allows for removing and replacing it in
the future. Honeywell recommends changing the
water lter or RO canisters 1 & 2 annually, or as
needed based on water conditions.
Install the provided backow preventer, as required
by code. See “Reverse Osmosis Filter” if using the
Reverse Osmosis Filter.
Cut the water line so it is long enough to reach
from the water lter to the supply tting on the
bottom of the steam humidier.
Insert the water line into the steam humidier
supply tting.
Note: Failure to check for a tight t with plastic water line
could result in the line coming loose in the future. Apply
modest pull to ensure water line is properly seated and
secure.
STEP TWO: Tap into a Water Line
• Consult local codes for proper plumbing.
• Use the saddle valve provided or a T-tting and
manual shutoff valve to tap into a cold water
line.
• Refer to the literature included with the valve
you chose and the local plumbing codes. Use
proper technique for the valve.
Saddle Valve
T-fitting
Water Supply
Line
Manual Shutoff
Valve
M29605
Water Supply and Drain Connections
MCR35266
BEST
PRACTICE Use a manual shutoff valve when tapping into a water line.
Steam Humidier System 69-2285—11
14
43
2
1
5

PLUMBING
STEP THREE: Connect Steam Humidier to the Cold Water Pipe
Connect one end of the remaining length of water
line to the backow preventer. Apply a modest pull
to ensure a tight t. See “Reverse Osmosis Filter” on
page 25 if using the Reverse Osmosis Filter.
Connect the other end of this line to the saddle valve
or T-tting and manual shutoff valve.
STEP FOUR: Connect to the Water Drain
• Consult and follow local plumbing codes for drain
pipe size and maximum temperature requirement.
• The ideal installation is directly to the main oor
drain using the rubber hose provided.
• If direct oor drain access is not available, see
“Other Plumbing Options” on page 17.
Connect the 1/2-inch drain hose provided to the drain
tting on the bottom of the steam humidier.
Use the hose clamp provided to secure the drain hose
to the barbed tting.
Route the drain hose to the oor drain. The hose must
have a continuous downward slope.
Direct the hose outlet into the oor drain. Secure
the hose to reduce the risk of hot water pooling
or splashing.
Note: Some building codes require an air gap between
discharge hose and oor drain.
MCR32901
MCR29607
Before proceeding to Wiring:
I have conrmed minimum required circuit capacity
I have connected the water supply using cold water
I have installed the drain connection
CAUTION: Scalding Hazard.
During operation, hot water may exit drain and can cause burns from scalding.
Make sure the hose is securely connected to the drain.
Steam Humidier System 69-2285—11 15
2
1
3
2
1
4

PLUMBING
Water Supply and Drain Connections (continued)
CAUTION
EXCESSIVE SIDE LOADS ON DRAIN AND
FILL HOSES CAN CAUSE LEAKS.
NO SIDE
LOAD!12 in. FREE
HANG LENGTH
• Allow 12 inches of drain hose and
fill hose to hang free before bending
• If RO Filter is installed directly below
Steam unit, install to either side of
drain and fill hoses.
• If a bend is required after 12 inches
of free-hang length, a strain relief
bracket, or an elbow may be used.
Consult and follow local plumbing
codes, and ensure a continuous
downward slope of drain hose.
Steam Humidier System 69-2285—11
16

PLUMBING
Other Plumbing Options
3/4 IN. COPPER PIPE
3/4 IN. FNPT X SWEAT
HOSE
CLAMPS
HOSE FROM
STEAM
HUMIDIFIER
212°F RATED PUMP
1/2 IN. BARB X 3/4 IN. MNPT
FLEXIBLE
HOSE
MCR28678
SEAL ALL CONNECTIONS FROM
SOLENOID VALVE TO DRAIN STACK
3/4 IN. FNPT X
1-1/2 IN. PVC
1-1/2 IN. (MINIMUM) PVC PIPE
3/4 IN. FNPT X 3/4 IN. CPVC
3/4 IN. CPVC PIPE
3/8-IN. TUBING
RATED AT 212°F
Connect to Steam Humidifier
Common to all plumbing options.
Option 1: Plumbing
to drain with
condensate pump. • Use Hartell A3X-115 condensate pump or equivalent
(212°F temperature rating, > 1 GPM pump flow rate).
• Pump must be powered when Steam Humidifier is operating.
• Use a pump with a built-in overflow sensor or install the pump
in a drip pan with wet switch wired to turn off Steam Humidifier.
HOSE CLAMPS AT
ALL CONNECTIONS
3/8-IN. TUBING
RATED AT 212°F
M28713A
3/4 IN. FNPT X 3/4 IN. CPVC
3/4 IN. CPVC PIPE
TO PUMP
ALTERNATIVE
HOSE FROM
STEAM HUMIDIFIER
The following diagrams are for applications where standard draining to a oor drain is not available.Choose the
plumbing option that suits your installation. Use A, B, C, or D based on type of pipe or condensate pump. Consult
and follow local plumbing codes in addition to these instructions.
• Support rubber hose every 6 in.
• PVC must be schedule 40 or higher rating.
• All plastic pipe joints are welded.
• Drain into a P-trap that will remain wetted at all
times.
For All Options Shown:
Steam Humidier System 69-2285—11 17

PLUMBING
Steam Humidier System 69-2285—11
18
1-1/2 IN. MINIMUM TRAP
(OR SIZE PER LOCAL CODE)
VENTED PER
LOCAL CODE
ALL PLASTIC PIPE
JOINTS ARE WELDED
M28679
3/4 IN. MNPT X SWEAT
3/4 IN. FNPT X 1-1/2 IN. PVC
1-1/2 IN. PVC
1-1/2 IN. (MINIMUM) PVC PIPE
3/4 IN. FNPT X 1-1/2 IN. PVC
3/4 IN. MNPT X 3/4 IN. CPVC
3/4 IN. FNPT X 1-1/2 IN. PVC
HOSE CLAMP
3/8 IN. BARB X 3/4 IN. MNPT
SIZE TO FIT PUMP OUTPUT
Option 2: Plumbing to a dedicated trap.
3/4 IN. MNPT X SWEAT
3/4 IN. FNPT X 1-1/2 IN. PVC
1-1/2 IN. PVC
1-1/2 IN. (MINIMUM)
PVC PIPE
3/4 IN. FNPT X 1-1/2 IN. PVC
3/4 IN. MNPT X 3/4 IN. CPVC
3/4 IN. FNPT X 1-1/2 IN. PVC
HOSE CLAMP
3/8 IN. BARB X 3/4 IN. MNPT
M28681
ALL PLASTIC PIPE UNDER
SINK 1-1/2 IN. MINIMUM PVC
ALL CONNECTIONS FROM
SOLENOID VALVE TO
DRAIN TRAP ARE SEALED
SINK
COUPLING
WELD
WELD
THREADS
THREADS
WELD
WELD
WYE
1-1/2 IN. PVC
STAINLESS STEEL
SLOTTED BAND
COUPLING SIZED TO
FIT PIPE (COPPER,
PVC, CPVC
)
ALTERNATIVE
THIS CONFIGURATION ALLOWS FOR
REMOVAL OF THE TRAP
SIZE TO FIT PUMP OUTPUT
Option 3: Plumbing to sink with a dedicated trap.