Honeywell HM509VPIAQ - TrueSTEAM 9 GPD Humidifier PRO... User manual

TrueSTEAM
As Easy as 1-2-3-4
PROFESSIONAL INSTALLATION GUIDE
See inside for detailed instruction and remote mounting options!
1Mount 2Hang
3Plumb 4Wire
69-2036EFS-07

Installation Guide
69-2036EFS—07 ii
Table of ConTenTs
Read and save these instructions.
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
® U.S. Registered Trademark.
Patents pending.
Copyright © 2008 Honeywell International Inc. All rights reserved.
Installation Recommendations ...................................................... 1
List of tools/supplies...................................................................... 2
Safety Precautions ......................................................................... 3
Duct Mount Instructions
Installation....................................................................................... 4
Remote Mount Instructions
Installation....................................................................................... 6
Plumbing and Wiring
Plumbing ....................................................................................... 12
Wiring ............................................................................................ 13
DIP Switch Selection.....................................................................17
Troubleshooting............................................................................ 18
Cleaning and Seasonal or Vacation Maintenance...................... 22
Additional Information
Parts List....................................................................................... 24

TrueSTEAM Humidification System
  69-2036EFS—07
Table of ConTenTs InsTallaTIon ReCommendaTIons
Make your TrueSTEAM installations accurate and efficient by addressing these commonly asked
questions:
Sizing for the Job
1. Selecting the appropriate humidifier for the job is critical:
The table below illustrates the square footage a TrueSTEAM humidifier can serve.
It is not recommended to install a 6 gallon device in a home larger than 2000 square feet.
Square Feet of Space 500 1000 1500 2000 2500 3000
ARI* Recommended Output Delivery (GPD) 0.1 2.2 4.4 6.5 8.6 11.7
TrueSTEAM HM512 - True 12 Gallons
TrueSTEAM HM509 - True 9 Gallons
TrueSTEAM HM506 - True 6 Gallons
* ARI Guideline F-2007 for maintaining 35% RH in a tight, residential four-person home with
8-ft. ceilings. Outdoor conditions = 20ºF and 70% RH.
Installation Check-out List
• Install the in-line water filter and back-flow prevention valve.
• Check that the main water supply line is open.
• Ensure there are no water leaks/drips at any of the water connections.
• Plug into a circuit with at least enough capacity to power the unit.
• Generate a call for humidity from the control and ensure TrueSTEAM fills and the Humidify
light turns on, indicating steam is being generated.
• Test the drain by pressing the EMPTY button until the Clean Tank light begins blinking,
indicating a drain cycle has begun.
NOTE: It may take approximately 10 minutes for the tank to fully flush and drain. TO BYPASS
AND DRAIN IMMEDIATELY, Press and hold the EMPTY button again while the Clean Tank light
is blinking. This will bypass the flush and immediately drain the tank. TO STOP draining, press
the Reset button.
• Mount the provided yellow tank service sticker on the duct/wall near the unit. Ensure the
drain hose is secured to prevent inadvertent disconnection. Check that the hose is plumbed
to a drain/condensate to prevent water spurting.

Installation Guide
69-2036EFS—07 2
InsTallaTIon ReCommendaTIons
Setting Homeowner Expectations for the TrueSTEAM Experience:
It may take up to a week of continuous operation to achieve the humidity set point, depending
on weather, size of home, furnishings in the home, insulation, etc.
If using a six (6) gallon unit, the most appropriate setpoint is 30-35% or until there is condensa-
tion on the windows, then lower the setpoint (if not in frost protection mode). If the home can’t
achieve the setpoint, the unit may be under-sized (if home is under 2000 sq ft, this can also be
due to insulation, windows, arid climate, etc.) or the outdoor temperature may be too low to
maintain adequate humidity levels. Honeywell recommends waiting for the temperature to mod-
erate closer to 20°F (-6°C).
If this occurs and the selected humidity levels are not achieved, then a larger capacity model
may be needed.
For the first week of operation, it is normal to experience a slight plastic odor in the home,
depending on the amount of supplied ventilation. If the remote hose is used, there may be a
slight rubber odor. These odors will dissipate within days of installation.
If the homeowner sees that TrueSTEAM is not humidifying but there is a call for humidity, it is
likely the unit is operating in drain cycle mode. Ask the homeowner to check again in an hour if
they are concerned the device may not be operating.
If the Call Service light is blinking, instruct the homeowner to press and hold the Reset button to
clear the fault. If the fault doesn’t clear, unplug the power to TrueSTEAM and plug back in to the
electrical outlet. Wait 24 hours prior to calling a contractor. The call service light may be blinking
due to a low voltage condition in the area and will reset to operate correctly when full power is
restored.
There may be a slight increase in the homeowner’s energy consumption. However, when operat-
ing correctly, TrueSTEAM will make the home feel warmer, allowing the homeowner to lower the
temperature setting on the thermostat. Every degree lower on the thermostat can save up to 3%
on heating costs.

TrueSTEAM Humidification System
 3 69-2036EFS—07
WhaT you WIll need To InsTall TRuesTeam
Tools/Hardware needed:
• Wire stripper/cutter
• Drill or duct-cutting tool
• 1-3/4-in. hole saw
• 1/8-in. drill bit
• Phillips and slotted (or Torx) screwdriver
• 18-gauge thermostat wire (5 or 2 conductor)
Material Provided:
• 1/4-in. copper or plastic water line
• 1/2-in. drain hose and clamps
• Mounting bracket and hardware
• In-line water filter* (50028044-001)
• Saddle valve
• Back-flow valve (50030142-001)
Options:
• Remote Installation Kits
–10-foot hose and nozzle kit (50024917-001)
–20-foot hose and nozzle kit (50024917-002)
• Humidity Controls
–Manual Humidistat (H8908ASPST)
–TrueIAQ (DG115EZIAQ)
–VisionPRO IAQ (YTH9421C1010)
• Water line T-fitting
• Manual shut-off valve
• Remote hose P-trap
• Remote mount duct board adapter kit
(32005530-001)
• Differential pressure switch (50027910-001)
* Warranty requires in-line water filter installation with regular service.
InsTallaTIon ReCommendaTIons

Installation Guide
69-2036EFS—07 
safeTy PReCauTIons
CAUTION: Voltage Hazard.
Can cause electrical shock or equipment damage.
Disconnect HVAC equipment before beginning installation.
Safety Precautions
• Do not direct the steam nozzle at people.
• If used near a pool or spa, ensure the TrueSTEAM can not fall into the water or be splashed.
Also, ensure the TrueSTEAM is plugged into a GFI ground fault interrupt outlet.
• Water inside tank can be very hot. Follow installation instructions and service steps exactly
as given in the technical literature.
• Do not cut into any air conditioning or electrical line
• Wear safety glasses when cutting or drilling.
• Mount the humidifier in a level position to avoid water damage or heating element failure.
• Reinforce duct as necessary to ensure stability.
The preferred installation location is on the warm or supply side of the furnace. If that location is
not possible, the steam nozzle should be inserted a minimum of 12 in. upstream of the furnace filter.
Depending on the location and the duct rigidity, additional duct reinforcement may be necessary.
• Do not install the humidifier where the ambient temperature is lower than 32°F (0°C) or higher
than 120°F (49°C).
• Do not install the humidifier through sidewalls of a return air duct made of wood (e.g., floor
joist).
• The mounting area must be strong enough to support the humidifier’s weight when it is full
of water (approximately 12 to 15 lbs.), and to hold the humidifier in a level position for safe,
reliable operation. Otherwise, additional duct or wall reinforcement will be necessary.
• If the ducting has exposed insulated materials on the interior, ensure the nozzle extends
beyond the insulation by clearing away excess insulation at the insertion point. You may wish
to replace a section of insulated duct (approximately 6 in. x 6 in.) with rigid, non-insulated
sheet metal to ensure effective installation.
• Mount the unit where it will have smooth air flow across the end of the steam nozzle.
• Allow at least 1 foot clearance to ventilation holes in humidifier’s cover. Do not cover these
holes. Covering them can increase the internal operating temperature of the humidifier and
shorten the humidifier’s life.
• Allow at least 4 inches of clearance between the steam nozzle insertion hole and the top of
the interior duct to avoid condensation forming. The mounting template is designed to allow
clearance if the top of the template is at or below the top surface of the interior duct.
• Do not mount directly to duct board. Remote mount nozzle attachment allowed only when
using with a duct board adapter kit (part #32005530-001).
• Do not install in completely enclosed spaces, such as a cabinet or unventilated closet.
Choose a location that is well ventilated.
Warning: Electrocution, Heavy Equipment, and Chemical Hazard.
Can cause death, blindness, water damage to home and heating element failure.
Warning: Steam Condensation, Fire, and Freezing Water Hazard.
Can cause failure of fan or limit control or result in water damage to home.

TrueSTEAM Humidification System
  69-2036EFS—07
safeTy PReCauTIons
M24744
duCT mounT InsTallaTIon
Choose a location that has access to a:
• Drain allowing a slope of 1/4 in.
per foot of drain hose.
• Cold water line.
• Electrical circuit rated to your
humidifier.
• Vertical surface with adequate
clearances.
1
Model
Required Minimum
Circuit Capacity
HM506 7 Amps
HM509 10 Amps
HM512 12 Amps
M24745
Install duct nozzle.
2
M24746
Ensure o-ring gasket
is properly seated in
the groove.
M24894
Insert nozzle and twist clock-
wise to ensure tight seal of
nozzle to TrueSTEAM.
Continuous
downslope
If installing the humidifier directly to the supply duct, follow steps on pages 5–6 and 13–18.
If mounting remote from the duct, follow steps on pages 7–18.
Draining water
may be hot.
Ensure drain out-
let not exposed.
CAUTION
Hot water temperature above 120°F (49°C)
can cause burns from scalding.

Installation Guide
69-2036EFS—07 6
duCT mounT InsTallaTIon
A) Slide foam gasket over nozzle and
insert the nozzle into duct hole
(pictured).
B) Push down to secure humidifier to
bracket arms. Ensure gasket forms
tight seal in duct hole.
Secure bracket to duct using #8
self-drilling sheet metal screws (4).
M24749
5 6
Proceed to page 13 for plumbing and wiring instructions.
M24750
A
B
Foam
gasket
M24748
SUPPLY
12 INCHES
4Drill 1-3/4-in. hole.
Position template sticker on supply duct. For tall coils that do not have this
clearance available, refer to remote mounting instructions.
3
Allow 3 in. clear-
ance from nozzle
outlet to duct wall.

TrueSTEAM Humidification System
 7 69-2036EFS—07
M24896A
Funnel or floor drain. Refer to governing
codes for drain pipe size and maximum
temperature requirements.
6 in.
8 in.
Most operation problems are caused
by improper hose installation. Always
ensure an uphill flow when installing
the remote hose, and avoid kinks,
sharp turns, or low spots that could
restrict the flow of steam into the
injection nozzle or condensation back
into the humidifier.
If the remote hose cannot be installed
with an upward pitch of 2 in./ft., a
wetted drip tee must be installed.
Failure to do so can result in back
pressure on TrueSTEAM, which can
lead to duct nozzle water spitting or
leaking gasket. Remote hose must be
supported to prevent sagging or low
spots.
1
Choose a location for TrueSTEAM and the
remote duct nozzle (see remote installs on
pages 6–7).
It should have access for:
• Remote hose installation. Steam hose
must be installed with 2 in./ft. pitch on a
continuous uphill slope.
• Drain. Allow a continuous downslope to the
drain.
• Cold water line.
• Electrical circuit rated to your humidifier
(see circuit ratings on page 10).
RemoTe mounT InsTallaTIon
Use for mounting to a location other than the supply duct.
Maximum 3 ft.
2 in./ft. uphill
1/2 in.
minimum
diameter
When remote mounting, also follow these critical
steps in sizing the proper TrueSTEAM:
If the steam distribution tube is going into an uncon-
ditioned air space (e.g., attic), insulate the tube to
ensure steam output efficiency:
• Honeywell recommends self-seal pipe insulation
for hot and cold water pipes. Insul-Tube 1-1/8 in. ID
x 1/2 in. wall 25/50 Factory Mutual 062411, flame
retardant added.
The 6-gallon model (HM506) can be remotely mount-
ed up to:
• 5 feet without insulating the steam distribution tube
• 15 feet if insulating the steam distribution tube
The 9- and 12-gallon models (HM509 and HM512)
can be remotely mount up to 20 feet with or without
insulating the steam distribution tube.
Ensure at least 2 in. per foot slope if installing the
remote hose horizontally.
duCT mounT InsTallaTIon
Water in
elbow

Installation Guide
69-2036EFS—07 
Note: If air handler location temperatures will drop
below freezing at any time, TrueSTEAM must be
mounted in a conditioned space, running a remote
hose to the duct.
M24786
Living Area Remote Options
M24781
Furnace or Mechanical Room Remote
M24785
Garage Remote
M24936
Duct Mount Remote
PRoPeR hose InsTalls
Draining
water may
be hot.
Ensure
drain out-
let not
exposed.
CAUTION
Hot water temperature above 120°F (49°C)
can cause burns from scalding.

TrueSTEAM Humidification System
 9 69-2036EFS—07
2 IN. PER FT
2 IN. PER FT 2 IN. PER FT
2 IN. PER FT
20 FT MAX
P - TRAP
DRAIN
WITH TRAP 5 FT MAX
3 FT MAXIMUM
DRAIN
P - TRAP
IF NO SLOPE
10 FT MAX GENTLE BEND
OBSTRUCTION
SUPPORTED REMOTE HOSE
20 FT MAX
DRAIN
WETTED P - TRAP
NOTE: HEIGHT OF TRAP MUST BE GREATER
THAN THE DUCT STATIC PRESSURE
DRAIN
P - TRAP
IF NO SLOPE
TYPICAL INSTALLATION
WHEN TrueSTEAM IS ABOVE
REMOTE NOZZLE
KINKED
SAG
NO SLOPE
NO SLOPE
M24915A
UNDRAINED
ELBOW
NOTES:
• Slope hose up in direction of steam flow at 2 in. per foot;
• Slope hose down in direction of steam flow at 3/4 in. per foot;
• Maximum length of remote steam hose is 20 ft.
• Height of P-traps must be greater than the duct static pressure. (Typical
3 in. will suffice.) P-trap must also be wetted (see page 7).
• Minimize sharp bends and elbows.
• Insulating the remote hose in unconditioned spaces will sustain
efficiency better than not insulating the hose.
PRoPeR hose InsTalls
AVOID THESE INSTALLATION MISTAKES.
PRoPeR hose InsTalls

Installation Guide
69-2036EFS—07 0
RemoTe mounT InsTallaTIon
M24744
M24745
M24764
Install hose adapter from Remote
Mount Kit.
2
Model Minimum Circuit Capacity
HM506 7 Amps
HM509 10 Amps
HM512 12 Amps
Continuous
downflow
M24765
Remote Mount Kit
(sold separately) Hose Adapter
Duct Nozzle
Hose Clamps
Remote Hose
M24894
Insert hose adapter and twist
clockwise to ensure tight seal
of nozzle to TrueSTEAM.
Ensure o-ring gasket is
properly seated in the
groove.
Draining water
may be hot.
Ensure drain out-
let not exposed.
CAUTION
Hot water temperature above 120°F (49°C)
can cause burns from scalding.
• 50024917-001 = Ten Foot Hose Kit
• 50024917-002 = Twenty Foot Hose Kit

TrueSTEAM Humidification System
  69-2036EFS—07
M24766
Position template sticker on remote location.
Note: TrueSTEAM will weigh 12–15 lbs. (+/- 2 lbs.) with
water, so if mounting onto drywall or plaster, position
one side over a wall stud.
3
4Insert wall anchors (4) into pilot holes and secure
bracket to location.
M24767A
Push down to secure TrueSTEAM to
bracket arms.
5
M24768
RemoTe mounT InsTallaTIonRemoTe mounT InsTallaTIon

Installation Guide
69-2036EFS—07 2
M24770
Cut a 1-3/4 in. diameter duct hole, install the provided
gasket, and slide the remote nozzle up into the duct.
Secure remote nozzle to duct using #8 self-drilling
sheet metal screws (4).
6
IMPORTANT:
Run hose continuously uphill. For horizontal runs,
ensure a slope of 2 in. uphill per foot. Secure hose
every horizontal foot using clamps (provided).
For long horizontal runs, support the hose by first
securing a length of 2 x 4 lumber, U-channel, or
angle iron with the appropriate slope. Then attach
the hose to the top of this support. If remote hose
requires downward pitch, refer to pages 5 and 7 for
instruction.
M24771
Run remote hose from
the humidifier to the duct
nozzle location. Up to 20
ft. of hose can be used.
7
If mounting remotely requires running
hose through structural barriers (ie.
wall or ceiling), cut at least a 1-3/4 in.
hole and slide hose through.
Seal off unconditioned space with a
grommet (not provided) or caulk.
8
Attach remote hose by sliding over the nozzle
and adapter. Secure both hose ends with
clamps (provided).
9
RemoTe mounT InsTallaTIon
Minimum 3 in. clearance
required from nozzle outlet to
duct wall.

TrueSTEAM Humidification System
 3 69-2036EFS—07
M24852
M24772
PlumbIng
AInsert 1/4-in. water line into filter. Apply modest pressure to ensure a tight fit.
10
BInsert 1/4-in. water line into back-flow valve. Apply modest pressure for a tight fit.
Water line tapping options. See instructions provided with the option you choose.
M27428
CD
1/4-in. water line
1/2-in.
drain tube
Enlarged view
T-fitting
To humidifier
Saddle valve (provided)
Piercing pin
Water supply line
To humidifier
Continuous
downslope
To water supply
Manual shutoff
valve (sold
separately)
Draining water may be
hot. Ensure drain outlet
not exposed. Ensure
drain or condensate
pump is rated for at
least 120°F water.
CAUTION
Hot water temperature above 120°F (49°C)
can cause burns from scalding.
Description Part Number
In-Line Water Filter (included)
(required for warranty)
50028044-001
Back-flow valve (included)
(required)
50030142-001
RemoTe mounT InsTallaTIon
CConnect 1/2-in. drain tube. Secure drain tube to barbed fitting with hose clamp.
DShut off the water supply. Secure 1/4-in. copper or plastic water feed tube.
AB
Check all water line connections to ensure no leaks once TrueSTEAM is operational.
1/4-in. copper
or plastic

Installation Guide
69-2036EFS—07 
Loosen captive cover
screw. Slide cover out from
front.
11
M24754
WIRIng
CAUTION: Voltage Hazard.
Before wiring to HVAC terminals, disconnect HVAC
equipment power. Ensure humidifier is not plugged in.
Low-Voltage Terminals
24V AC power for electronic humidistat.
HUM Low-voltage humidistat (or thermostat) terminals control
humidifier operation.
C, R Connects to HVAC system transformer terminals (or relay
transformer fan control R and C) to ensure HVAC power
is present before humidifying. This can be disabled by
changing DIP switch 4 (see page 16).
RT Connects to thermostat R terminal, which is normally
switched to call for fan.
GT, GT connects to thermostat G terminal. GF connects to
fan board G terminal. Thermostat G passes through the
normally-closed (NC) relay contacts to GF, allowing fan
activation. When TrueSTEAM is ready to provide humidity
to the home, it will take control of the fan by forcing power
from RT to GF (if not already activated).
EXT When a 24-vac fan board is not used to control blower
(hydronic or cooling-only applications), this connection
with GF provides dry-contact closure for fan calls. EXT/
GF may be wired to a low-voltage relay control center to
provide line-voltage fan control.
M24895
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
GF
M24893
Route wires through the raised harness tabs and out the notch at
the rear of the chassis. Ensure wires are secure and do not inter-
fere with assembly of cover.
Tabs Notch

TrueSTEAM Humidification System
  69-2036EFS—07
WIRIng
HVAC
RECOMMENDED
AIR FLOW SWITCH (AFS)
MECHANICAL
HUMIDISTAT
HVAC
POWER
MASTER
THERMOSTAT
HUM
HUM
GYWR Rc
GYW
RC
TrueSTEAM - INTERNAL
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
M24756
12 Wire the TrueSTEAM according to the diagram that applies to your humid-
ity control.
Follow this diagram if using a mechanical humidistat
such as H8908ASPST or other.
FAN
FURNACE BOARD
EQUIPMENT INTERFACE MODULE (EIM)
G
C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
CONV. HP
1
2
3
C
R
RC
RH
W1
W2
W3
Y
Y2
G
O/B
AUX
AUX2
Y
Y2
G
H1
U
M2
D1
H
M2
V1
N
T2
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
FAN RELAY
VISIONPRO IAQ
D-1
R-2
C-3
M24758
RECOMMENDED AIR FLOW SWITCH (AFS)
TrueSTEAM - INTERNAL
Follow this diagram if using VisionPRO IAQTM for independent fan control. TrueSTEAM will
independently activate furnace fan (humidity on demand).
A
Set VisionPRO IAQTM ISU
parameter 374 to 3.
A
HVAC
TrueIAQ
THERMOSTAT
HUM
HUM
R
C
GYWR Rc
GYWR C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
RECOMMENDED
AIR FLOW
SWITCH (AFS)
M27409
HVAC
POWER
MASTER
TrueSTEAM - INTERNAL
Follow this diagram to wire TrueIAQ for manual
operation.
Factory
installed
jumper
Factory
installed
jumper
If AFS is used, ensure DIP 5
is in ON position.
If AFS is used, ensure DIP 5 is in ON position.
If operating TrueSTEAM without
monitoring HVAC power or
AFS, C wiring hookup is
optional, but ensure DIP 4 is in
ON position.
B
B
If AFS is used, ensure DIP 5
is in ON position.
WIRIng
A
Set TrueIAQ ISU parameter 10 to 1, and ISU 25 to 2.
A
For auto-operation: also wire W and G to thermostat
W and G.
B
B

Installation Guide
69-2036EFS—07 6
WIRIng
FAN
FURNACE BOARD
EQUIPMENT INTERFACE MODULE (EIM)
G
C
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
CONV. HP
1
2
3
C
R
RC
RH
W1
W2
W3
Y
Y2
G
O/B
AUX
AUX2
Y
Y2
G
H1
U
M2
D1
H
M2
V1
N
T2
HEAT 1 RELAY
HEAT 2 RELAY
HEAT 3 RELAY
COOL 1 RELAY
COOL 2 RELAY
FAN RELAY
HVAC
POWER
MASTER
VISIONPRO IAQ
D-1
R-2
C-3
M24761
RECOMMENDED
AIR FLOW SWITCH
(AFS)
TrueSTEAM - INTERNAL
Follow this diagram for a system with the VisionPRO IAQTM with operation dependent on HVAC power
(humidification and fan call by thermostat).
Set VisionPRO IAQTM ISU
parameter 374 to 1. This
allows the thermostat to call
for fan at the same time as it
calls for humidification.
If AFS is not used, set DIP 4
ON and wire HUM terminals
only.
If AFS is used, set DIP 5 ON
and DIP 4 OFF and wire R, C,
and Hum terminals.
B
B
24V
24V
HUM
HUM
C
GT
R
RT
GF
EXT
HUMIDISTAT
HUM
HUM
HAC
HAC
MECHANICAL
HUMIDISTAT
HUM
HUM
HAC
HAC
RECOMMENDED
AIR FLOW SWITCH
(AFS)
TrueSTEAM - INTERNAL
HVAC
120 VAC
R8222
RED
BLACK
L1
L2
120
VAC
AT120
R C
M24760
HVAC POWER MASTER
Follow this diagram if using a blower fan dedicated to the TrueSTEAM (a fan separate from the HVAC
equipment, as in hydronic or cooling-only applications).
Remove Factory installed
jumper (R/RT)
If AFS is used, ensure DIP 5
is in ON position.

TrueSTEAM Humidification System
 7 69-2036EFS—07
Slide the cover back into place and secure captive screw.
Turn on the water supply and plug in the humidifier.
13
The Press Reset light will blink when
power is applied.
Press/release the RESET button to
ready the TrueSTEAM. If not pushed,
TrueSTEAM will automatically move to
ready after five minutes.
14
POWER
HUMIDIFYING
CLEAN TANK
CALL SERVICE
PRESS RESET
PRESS EMPTY
RESET
EMPTY
SEE LABEL BELOW !
M24763
M24762
Confirm that the furnace blower turns on to circulate air. This will take about 10–15
minutes upon call for humidity.
16
Important for Remote Installation:
After TrueSTEAM has produced steam for 10–15 minutes, check the integrity of the
remote hose to ensure no sags have occurred. Add or adjust clamps if necessary to
ensure 2 in. per foot continuous slope.
Turn the humidity control to the “Test” position. If the “Test” position is unavailable,
turn the control to a high setpoint (60% +). Be sure to turn this back down (or off) when
testing is complete. “Off” will turn TrueSTEAM off.
15
WIRIngWIRIng

Installation Guide
69-2036EFS—07 
dIP sWITCh seleCTIon
Between the transformer and LED display on the circuit board are two sets of DIP switches. DIP
1 and 2 can be configured to adjust cleaning cycles. DIP 4 and 5 can simplify wiring. DIP 3 and 6
are not used at this time. Details below.
M24853
OFF
ON
OFF
ON
OFF
ON
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
DIP
3
DIP
3
D
IP
3
D
IP
6
D
IP
6
DIP
6
Run time (hrs) End-of-Season timer
(hrs)
Clean tank indicator
10 hrs of humidify-
ing before system
auto-flushes debris
from tank.
48 hrs before system auto-
drains and remains empty
until next call for humidity.
1 year of total time (operational
and inactive) before the Press
Empty light will blink, indicating
it is time to manually clean the
water tank.
20 hrs of humidify-
ing before system
auto-flushes debris
from tank.
48 hrs before system auto-
drains and remains empty
until next call for humidity.
1 year of total time (operational
and inactive) before the Press
Empty light will blink, indicating
it is time to manually clean the
water tank.
30 hrs of humidify-
ing before system
auto-flushes debris
from tank.
48 hrs before system auto-
drains and remains empty
until next call for humidity.
1 year of total time (operational
and inactive) before the Press
Empty light will blink, indicating
it is time to manually clean the
water tank.
M28181
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
OFF
ON
OFF
ON
DIP 1 DIP 2 DIP 3
DIP 4 DIP 5 DIP 6
OFF
ON
DIP
3
D
IP
3
DIP
3
D
IP
6
DIP
6
D
IP
6
DIP 4 OFF, DIP 5 ON: If TrueSTEAM determines that no airflow*
is present two minutes after the blower fan call, it will shut down
steam output and activate a service light.
*Requires installation of air flow switch. See 'Wiring' section for details.
DIP 4 ON, DIP 5 either setting: TrueSTEAM will allow humidity
without HVAC power present and without airflow.
DIP 4 OFF, DIP 5 OFF: TrueSTEAM will not be allowed to humidify
without HVAC power being present.