Honeywell TRUESTEAM Operating instructions

Must be installed by a trained, experienced technician

Read these instructions carefully. Failure to follow these instructions

can damage the product or cause a hazardous condition.

TrueSTEAMTM

Operating Manual

69-2035EFS-01

About your new humidifier

TrueSTEAM controls ........................................................................................ 1

Maintaining ideal humidity .............................................................................. 2

TrueSTEAM function and operation ............................................................... 3

Setting the controls ......................................................................................... 4

Specifications .................................................................................................. 5

Maintenance and operation

LED light indicators .................................................................................................6

Cleaning and maintenance .....................................................................................7

Seasonal or vacation maintenance ........................................................................8

DIP switch setting ...................................................................................................9

Troubleshooting and repair

Parts list .................................................................................................................10

Homeowner troubleshooting ................................................................................11

Professional HVAC technician troubleshooting ...................................................12

Limited warranty ....................................................................................................16

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

Table of contents

® U.S. Registered Trademark.

Patents pending.

TrueSTEAM Direct-Injection Humidifier

1 69-2035EFS—01

About your new thermostat

Congratulations on your new humidifier. Your Honeywell TrueSTEAM direct-injection humidifier

provides the high performance and efficiency of steam humidification with easier maintenance

than traditional humidifiers.

Benefits

• Actually controls your equipment for maintaining desirable humidity levels in your home

year-round.

• Requires less water, reducing usage up to 70% when compared to flow-through

humidifiers.

TrueSTEAM comes with one of the following control packages:

About your new humidifier

VisionPRO IAQ Total Comfort System YTH9421C1002

• Controls both temperature and TrueSTEAM.

• Sensor for displaying outdoor temperature.

• Intuitive user interface for easy 7-day temperature

programming.

• Easy-to-read backlit digital display.

• Maintenance and service reminders.

• Controls other air quality equipment when you’re

ready.

TrueIAQ Digital Control DG115EZIAQ

• Automatic adjustments maintain ideal humidity.

• Sensor for displaying outdoor temperature and

humidity.

• Shows actual humidity and desired setting.

• Maintenance and service reminders.

• Controls other air quality equipment when you’re

ready.

Manual Control H8908ASPST

• Manual control with intuitive comfort settings.

• Integrated humidity chart for accurate control in

changing conditions.

Operating Manual

69-2035EFS—01 2

Maintaining ideal humidity

Optimal Relative Humidity (RH) is defined by industry experts* as between 40-60% RH on an

average annual basis, and 35% during the heating season in dry climates. An environment with

too little humidity leaves the body vulnerable to viruses and bacteria, and can cause woodwork

in the house to shrink and crack. On the other hand, too much humidity creates ideal conditions

for mold and mildew growth.

Proper indoor humidity can also help you save money on energy bills. When maintained proper-

ly, your equipment won’t have to run as much because humidified air feels warmer in the winter.

* American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE)

M24780

0 10 20 30 40 50 60 70 80 90 100

OPTIMUM

ZONE

Bacteria

Viruses

Fungi

Mites

Respiratory

Infections

Allergic Rhinitis

and Asthma

Chemical

Interactions

Ozone

Production

ASHRAE recommeded winter design level

TrueSTEAM Direct-Injection Humidifier

3 69-2035EFS—01

M24784

TrueSTEAM function and operation

Your TrueSTEAM humidifier provides the highest capacity and most efficient steam humidifica-

tion for whole-house residential applications.

The patented Condensate

Collect Dome and beveled nozzle

keep water in the tank, delivering

only true steam into your duct’s

airflow.

Sediment screen

keeps the tank clean

for a longer period of

time, reducing main-

tenance and ensuring

optimum perfor-

mance.

Wiring to your HVAC equipment

allows TrueSTEAM to supply humidity

when you need it by turning on your

equipment automatically.

LED light feedback allows you to

monitor performance, giving you

total control and peace of mind.

True steam provides your home with high-

capacity true humidity, while using up to 70%

less water than flow-through humidifiers.

Snap-lock latch allows

for quick, easy main-

tenance.

Automatically fills with

water and drains when

needed, so you don’t have

to remember to do it.

Operating Manual

69-2035EFS—01 4

With automatic controls like TrueIAQ and VisionPRO

IAQ, you need only calibrate this setting once. The

automatic feature will adjust by itself as outdoor condi-

tions change, based on your initial settings. After set-

ting your auto control to the desired RH% level, check

for condensation or frost forming on windows on the

first cold day. If present, adjust your frost settings on

the control (see control owner’s manual if needed).

The Window Frost Protection feature protects your

home by limiting humidity output based on outdoor

conditions (for example, on colder days, your home can hold less humidity).

Frost Settings should be lowered by one value each morning that you see frost or condensa-

tion on windows. Allow 24 hours for the adjustment to take affect. Once you have this set to a

comfortable level without condensation forming, you will not need to adjust this again. You can

adjust your humidity settings without worrying about condensation.

With Manual Humidity Controls—such as the H8908—you

will need to adjust your RH% settings each time the outdoor

conditions change (more humidity with warmer outdoor con-

ditions, lower humidity with colder conditions). These con-

trols provide accurate operation, but require more hands on

adjustment. These controls are a good choice for homeown-

ers who desire continuous interaction with humidity settings.

Setting the controls

The colder it is outside, the less humidity can be retained by the air. Initially setting your humidi-

stat to ideal comfort levels will help your TrueSTEAM deliver optimal humidification. The table

below provides suggested control settings based on outdoor conditions.

M24830

123456789

LESS HUMIDITY

LOOSE HOME/SINGLE-PANE WINDOWS

MORE HUMIDIT

TIGHT HOME/TRIPLE-PANE WINDOWS

You may experience that your home needs

humidity levels to be slightly higher or lower

than the suggested levels given in the table, in

order to prevent window condensation or dry-

ness. This is because your home is unique in

size, shape, building tightness, and age. These

variables play an active role in how your indoor

humidity fluctuates. Use the table as a start-

ing point, but adjust according to your comfort

and observations of condensation.

Outdoor

Temperature

Recommended RH %

Setting

-20°F (-29°C) 15%

-10°F (-23°C) 20%

0°F (-18°C) 25%

10°F (-12°C) 30%

20°F (-7°C) 35%

>20°F (-1°C) 40%

TrueSTEAM Direct-Injection Humidifier

5 69-2035EFS—01

Install TrueSTEAM according to National Electric Codes.

Capacity:

HM512: 12 gallons per day (gpd) (45 liters per day [lpd])

HM509: 9 gpd (34 lpd)

HM506: 6 gpd (23 lpd)

Humidified Area:

House Description Air Changes Per Hour HM512 HM509 HM506

Loose Two 2000 sq. ft. 1300 sq. ft. 1000 sq. ft.

Average One 2500 sq. ft. 1800 sq. ft. 1500 sq. ft.

Tight One-half 3000+ sq. ft. 2500 sq. ft. 2000 sq. ft.

Weight:

Model Empty Filled with Water

HM512 9 lbs. 15 lbs.

HM509 9 lbs. 14.5 lbs.

HM506 8 lbs. 12 lbs.

Dimensions: 11-1/4 in. W x 19 in. H x 9 in. D

Humidifier Operating Temperature Range: 34ºF–104ºF (1.1ºC–40ºC)

Remote Hose/Nozzle Operating Temperature Range: -50ºF–250ºF (-46ºC–121ºC). Meet this spec-

ification if purchasing hose off-the-shelf.

Operating Humidity Range: 0–95% RH, non-condensing

Drain Hose Operating Temperature Range: 34ºF–212ºF (1.1ºC–100ºC)

Electrical Ratings and Tolerances

Specifications

Input Ratings

• Power Supply: 120VAC +10/ -15%, 60Hz

- HM512: 1440W at 120VAC at full load

- HM509: 1200W at 120VAC at full load

- HM506: 840W at 120VAC at full load

• HM512: 12A, 120VAC

• HM509: 10A, 120VAC

• HM506: 7A, 120VAC

• 15A, 120VAC interlock switch

• Thermostat/HVAC power monitor (R to

C): 10mA resistive at 24VAC

• Field wiring terminals: 18–22 ga. solid

• HVAC power/airflow monitor: 10 mA

resistive at 24 VAC

Output Ratings

• Relay output contacts:

- Fan: 1.5A full load, 7.5A locked rotor

at 24VAC

- Heat and Backup: 15A resistive at

120VAC

• Fill Solenoid: 0.1A at 120VAC, 0.5 PF

• Drain Solenoid: 0.1A at 120VAC, 0.5PF

• Humidistat output contacts: 10mA

resistive at 24VAC

• Humidistat power supply: 100mA at

24VAC

Standards & Approval Body Requirements

Underwriters Laboratories: UL998, File no. E185662.

Federal Communications Commission: Class B compliance, File no. YU555.

Tested to ARI standard 610 and ASHRAE 62.2 for performance rating of central system humidi-

fier for residential applications. Intended to be used in accordance with the National Electrical

Code (NEC), ANSI/NFPA 70, and the rules of the Canadian Electrical Code (CEC), Part 1, C22.1.

Operating Manual

69-2035EFS—01 6

LED light indicators

The LED light panel on the TrueSTEAM lets you know that the humidifier is operating correctly,

when maintenance is needed, and when it is safe to remove the tank for cleaning. The push but-

tons allow the tank to be drained for cleaning, and quickly return to operation when the tank is

reattached to the humidifier.

Power indicates the TrueSTEAM is plugged in and that the humidifier is

ready for operation.

Humidifying indicates that steam is being delivered to the home.

Clean Tank: This LED blinks to indicate the TrueSTEAM is draining when

you press the EMPTY button. When the light is on solid (not blinking), the

tank is empty and safe to remove for cleaning.

Call Service is a fault indicator. Call your HVAC technician to service the

humidifier. HVAC technicians: Refer to page 12 for fault identification and

troubleshooting.

Press Reset will blink when power is applied or reapplied (upon initial

installation or after cleaning). This is a stand-by mode to ensure water

lines are hooked up properly before unit resumes operation. This will blink

for 5 minutes before going to system ready. The 5-minute default can be

overriden by the installer by pressing the RESET button.

Press Empty will blink to indicate that the water tank needs cleaning. Push

the EMPTY button to drain the tank for safe removal and cleaning.

Reset Button If the Press Reset light is blinking, press the RESET button to

override the 5-minute delay at startup. If the Call Service LED is on (fault is

present), press/release the RESET button to blink a diagnostic code on the

Call Service LED. Press/Hold the button for 5 seconds to clear all faults and

reset “Clean Tank” timers. If the Press Empty LED is blinking, press/hold the

RESET button for 5 seconds to turn off the Press Empty LED and restart the

Clean tank timer.

Empty Button will drain the tank of water when pushed. Do this before

servicing the tank and internal parts.

POWER

HUMIDIFYING

CLEAN TANK

CALL SERVICE

PRESS RESET

PRESS EMPTY

RESET

EMPTY

SEE LABEL BELOW !

M24763

TrueSTEAM Direct-Injection Humidifier

7 69-2035EFS—01

About your new thermostatCleaning and maintenance

Warning: Scalding hazard.

Do not attempt to remove the humidifier from the mounting bracket during operation, or

the humidifier’s water tank when full of water. The heating element could be hot when

tank is removed. Failure to comply could result in severe scalding or death.

To clean TrueSTEAM:

1. Press the EMPTY button. Wait for the CLEAN TANK light to be on solid (not blinking).

2. Turn the manual shut-

off valve at the bottom

of the tank to the

“Unlock” position.

Maintenance is made simple with the TrueSTEAM—just remove the water tank for cleaning.

EMPTY

M24774

CLEAN TANK

(BLINKING LIGHT)

M24775

M24777

M24778

M24779

4. Firmly grip the tank

bottom. Push down the

cover's safety button and

pull the latch forward to

release the tank.

Note: Latch does not come

off humidifier with tank.

3. Grip the white water

valve arm and slide it

back within the bracket

to disengage from the

tank.

M24776

CLEAN TANK

(ON SOLID)

Wait Go to Step 2

Operating Manual

69-2035EFS—01 8

About your new thermostat

Seasonal or vacation maintenance

TrueSTEAM has the built-in intelligence to shut down when humidity is not needed for an

extended period. After 48 hours of inactivity, TrueSTEAM will drain its tank and remain empty

until it is needed again. This prevents water from stagnating within the tank. There are a few

house-cleaning steps to follow to keep your TrueSTEAM at peak efficiency:

1. Follow steps 1–6 in the Cleaning section on pages 7–8 at least once per year, or when the

Press Empty light is blinking.

2. Clear ventilation holes in the humidifier’s cover.

3. Clear the water drain tube.

4. Make sure the water tank gasket seal is not cracked or split before reattaching the

humidifier water tank.

5. Check that the humidifier is still level.

Extended Vacation

When you leave on extended vacations, it is recommended you turn off the humidifier’s water

supply and turn off the humidity control. When you return, turn on the humidifier water supply and

reset your humidity control to a comfortable position.

5. Use tap water to flush loose minerals

from the tank. Sediment screen at

tank's bottom is removable. For a more

thorough cleaning, soak tank in warm,

soapy water, then rinse clean. Tank is

also dishwasher-safe.

Cleaning and maintenance

M24856

M24857

6. Carefully rub minerals off of the heating

element and reservoir walls. Scouring

pads suitable for non-stick pots or pans

are suitable for cleaning the TrueSTEAM

reservoir walls and components within the

tank.

Sediment screen

Once clean, reattach tank by securing the latch. Engage the water valve to the cam shaft, and

“Lock” the shut-off valve. The “Press Reset” light will blink at start-up. Push the RESET button

to ready the humidifier.

TrueSTEAM Direct-Injection Humidifier

9 69-2035EFS—01

Between the transformer and LED displays 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. Refer to the chart for details.

Run time (hrs) End-of-Season

timer (hrs)

Clean tank indicator

10 hrs of

humidifying

before system

auto-flushes

debris from

tank.

48 hrs before sys-

tem 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, indicat-

ing it is time to manually

clean the water tank.

20 hrs of

humidifying

before system

auto-flushes

debris from

tank.

48 hrs before sys-

tem 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, indicat-

ing it is time to manually

clean the water tank.

30 hrs of

humidifying

before system

auto-flushes

debris from

tank.

48 hrs before sys-

tem 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, indicat-

ing it is time to manually

clean the water tank.

DIP 4 OFF, DIP 5 ON: If TrueSTEAM determines that no air-

flow* 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 humid-

ity 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.

M24899

OFF

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

M24900

DIP 1

DIP 2

DIP 3

DIP 4

DIP 5

DIP 6

OFF

DIP 1

DIP 2

DIP 3

DIP 4

DIP 5

DIP 6

OFF

DIP 1

DIP 2

DIP 3

DIP 4

DIP 5

DIP 6

OFF

DIP

DIP switch setting—For professional HVAC technician only

Operating Manual

69-2035EFS—01 10

About your new thermostatParts list

Part Part Number Fig. Reference

10-foot Remote Hose and Nozzle Kit 50024917-001 1

20-foot Remote Hose and Nozzle Kit 50024917-002 1

Cover 50028004-001 2

Duct Injection Nozzle for Humidifier 50028003-001 3

Remote Humidifier Nozzle 50028001-001 4

Remote Duct Nozzle 50028002-001 5

Mounting Bracket 50020012-001 6

Solenoid Valve 50027997-001 7

In-Line Water Filter 50028044-001 8

Sediment Screen for Tank 50024895-001 9

HM512/HM509 Water Tank 50020017-001 10

HM506 Water Tank 50025892-001 11

Water Level Sensor Assembly 50027998-001 12

Wire Channel Harness 50022641-001 13

Latch 50024921-001 14

Saddle Valve 32001616-001 15

M24787

TrueSTEAM Direct-Injection Humidifier

11 69-2035EFS—01

Homeowner troubleshooting

If you have difficulty with TrueSTEAM, please try the following suggestions.

Most problems can be corrected quickly and easily.

Problem Look For What to Do

Low humidity Humidifier heater is

not operating

• Confirm that power light is on.

• Set the humidistat higher.

• Check that the furnace power is on.

• Reset your circuit breaker or check for blown fuse.

• If fault persists, turn humidistat off, unplug unit,

reset circuit breaker and call a professional HVAC

contractor.

Rapid air changes.

Drafts (cold air

is dry and is an

added load for the

humidifier)

• Keep doors and windows closed.

• Close fireplace damper when not in use.

• Keep exhaust fan running time to a minimum.

• Seal around doors and windows.

High Humidity Condensation on

walls

• Turn off the humidity control until condensation is

completely evaporated. Lower humidistat setting to

prevent reoccurance of condensation (see pages 2–4

for controlling humidity levels).

Heavy

condensation on

windows

• Turn humidity control down low enough to eliminate

condensation caused by moisture from bathing,

mopping, cooking, etc. If moisture persists, more

ventilation is needed.

Call for

Service LED

is blinking

TrueSTEAM has

detected one of 15

system faults.

• Press Reset button.

• If fault persists, turn off power supply to the

humidifier, and turn back on.

• If fault persists, call a professional HVAC contractor.

Operating Manual

69-2035EFS—01 12

About your new thermostat

TrueSTEAM has internal system diagnostics that monitor system operation and maintenance

schedules as well as system faults. If a system fault is detected, the system will attempt to

recover itself up to five times in a 24 hour period. If unable to recover in that time, the red Call

Service light will activate.

NOTE TO HOMEOWNERS: If the Call Service light is active, unplug and plug the TrueSTEAM

back in to clear the fault codes. If the Call Service light turns back on within one day, contact

your professional HVAC installer to troubleshoot the device.

HVAC INSTALLING TECHNICIANS: If the TrueSTEAM Call Service light is red, a system fault

has occurred from which the humidifier can not recover by itself. The table below shows the

possible faults, along with steps to fix TrueSTEAM.

To see which of these faults has occurred, pressing the Reset button when the red Call Service

light is on will identify the fault through a series of red light blinks. Pressing and holding the

Empty button will clear the service fault lights.

Some of these faults will cause TrueSTEAM to shut down and enter Service mode, and some

can be recovered if the fault condition no longer exists after 1 hour (as indicated in column 3).

After 5 retries within 24 hours of any individual shutdown fault, the unit will enter Service mode

and will not try to recover until the power has been cycled. The retry counter will reset every 24

hours on time if it has not reached the maximum of 5 retries. The control will return to Ready

mode after all the faults have been recovered.

No. of

Red

Light

Blinks

Fault Description Auto-

Recoverable?

Steps to Fix

To be Performed by Professional HVAC

Technician Only

1 Water/Heater tempera-

ture sensor failed.

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Unplug TrueSTEAM and remove cover.

• Check water sensor connection to

electronic board.

• Reattach cover and plug TrueSTEAM in.

• If fault reappears, press EMPTY button and

follow tank cleaning steps on pages 7–8.

• Reassemble tank and press the RESET

button.

• If fault returns, replace with applicable

wattage heating element.

2 Water sensors failed. Yes, system

will return to

“Ready” if

fault no lon-

ger exists in

1 hour. Will

attempt to

reset itself 5

times in 24

hours.

• Unplug TrueSTEAM and remove cover.

• Disconnect water level sensor wiring,

remove screen and lift snap-hinge clamp.

Remove water sensor assembly.

• Clean water sensor probes using warm

soapy water so that the metal is exposed.

• Reassemble the sensor assembly in the

unit, reattach and secure cover.

• Plug unit back in and press the RESET

button.

• If fault reappears, replace water sensor

assembly.

Professional HVAC technician troubleshooting

M24901

TrueSTEAM Direct-Injection Humidifier

13 69-2035EFS—01

About your new thermostat

No. of

Red

Light

Blinks

Fault Description Auto-

Recoverable?

Steps to Fix

To be Performed by Professional HVAC

Technician Only

3 Failure to fill tank with

water.

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Ensure inlet water is on.

• Check for leaks around the tank seal and

solenoid.

• Turn off water supply and replace in-line

water filter.

• Press/hold RESET button until the red Call

Service light turns off.

• If tank still fails to fill, press the EMPTY

button (if unit fails to drain, unplug unit and

make sure water in tank is cool).

• Follow tank cleaning instructions on page

7. Ensure you have a firm grip of the tank

prior to releasing the tank, especially if

water is present.

• Clear any excess debris from the tank’s

bottom orifice to the solenoid.

• Reassemble tank and plug unit back in.

Press the RESET button.

• If water still fails to flush into the tank,

replace the solenoid valve.

4 Heating element

overheated.

No • Press EMPTY button.

• Follow tank cleaning steps (pages 7–8).

• Reassemble tank and press the RESET

button.

• If fault returns, replace with applicable unit.

5 Input voltage

insufficient.

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Unplug and replug the unit in to see if the

fault returns.

• If fault returns, unplug unit and remove

cover.

• Ensure wiring connections are secure and

attached.

• If fault returns, replace the TrueSTEAM

with a new one (field service is not

recommended in the event line voltage is

lost).

HVAC technician troubleshooting

Operating Manual

69-2035EFS—01 14

No. of

Red

Light

Blinks

Fault Description Auto-

Recoverable?

Steps to Fix

To be Performed by Professional HVAC

Technician Only

6 Water overflow sensed. Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Ensure drain hose is not kinked or

submerged in water at the drain. Check

functionality of condensate pump if used.

• Check for water coming out of drain/

overflow line. If continuous water flow

is present, follow the cleaning steps on

pages 7–8.

• Press EMPTY button to drain tank.

• Set humidistat RH setpoint to Test mode.

• If fault returns, unplug TrueSTEAM.

• Loosen cover screw and remove cover.

• Disconnect water level sensor wiring and

lift snap-hinge clamp to remove water

sensor assembly. See image on page 12.

• Clean probes using warm soapy water so

that the metal is exposed.

• Reassemble the sensor assembly in the

unit, reattach and secure cover.

• Plug unit in, and press RESET button.

• If fault reappears, replace water sensor

assembly and/or solenoid valve.

7 HVAC power not pres-

ent (monitor this fault

only when DIP 4 and 5

are OFF).

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Unplug and replug the unit in to see if

power returns.

• If not, ensure HVAC equipment has power.

Check circuit breaker and replace fuse if

circuit is tripped.

• Unplug TrueSTEAM and remove cover.

• Ensure DIP 4 is ON and reattach cover.

• Plug unit in.

• If fault reappears, ensure the circuit being

used has the rating to support the unit.

Unplug any additional equipment plugged

into this circuit. If fault disappears, the

circuit capacity is not properly sized to

your unit.

• If fault returns, replace unit.

8–11 The backup weld moni-

tor input is active when

the backup heater

relay is off.

No • Replace the unit.

HVAC technician troubleshooting

TrueSTEAM Direct-Injection Humidifier

15 69-2035EFS—01

No. of

Red

Light

Blinks

Fault Description Auto-

Recoverable?

Steps to Fix

To be Performed by Professional HVAC

Technician Only

12 Temperature of the

electronic circuit board

is too high.

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Ensure ventilation holes in the cover are

clear of obstruction, and that 1 foot of

clearance is maintained around the cover’s

vent holes.

• Ensure the TrueSTEAM is installed in a

location with conditioned air 32°F (0°C) to

104°F (40°C).

• Turn humidistat off and allow time for

electronic board to cool.

• Turn humidistat on and press RESET

button.

• Confirm humidity call starts by

HUMIDIFYING light turning on.

• Allow unit to run and check for steam leaks

around tank and ventilation holes.

• If steam is present, replace TrueSTEAM.

13 Tank failed to drain. No • Press the EMPTY button.

• If unit fails to drain, wait for water in tank

to cool. Ensure tank water is cool before

proceeding.

• Once cool, follow tank cleaning steps

(pages 7–8).

• Reassemble tank and press the RESET

button.

• If fault persists, replace the solenoid valve.

14 Heater failed to boil

water.

Yes, system

will return to

“Ready” if

fault no longer

exists in 1

hour.

• Press EMPTY button, and follow tank

cleaning steps (pages 7–8).

• Reassemble tank and press the RESET

button.

• If fault returns, replace the heating element

with the applicable wattage replacement

part.

15 No Airflow Yes • Ensure Airflow Switch is wired correctly.

The TrueSTEAM installation guide

(69-2036) contains diagrams for proper

wiring.

• Ensure DIP switches are set correctly.

• If fault persists, replace AFS and/or unit.

HVAC technician troubleshooting

Operating Manual

69-2035EFS—01 16

About your new thermostat5-year limited warranty

Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a

period of five (5) years from the date of purchase by the consumer. If at any time during the warranty period the product is deter-

mined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).

If the product is defective,

(i) return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or

(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the determination whether the product should be

returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN 55422,

or whether a replacement product can be sent to you.

This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the

defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL

NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES

RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER

FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequential damages, so

this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY

IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,

IS HEREBY LIMITED TO THE FIVE-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an

implied warranty lasts, so the above limitation may not apply to you.

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Dr, Golden

Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35

Dynamic Drive, Toronto, Ontario M1V4Z9.

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

http://yourhome.honeywell.com

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Toronto, Ontario M1V 4Z9

® U.S. Registered Trademark.

Patents pending.

69-2035EFS—01 M.S. 08-07

Automation and Control Solutions

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

Honeywell TRUESTEAM Operating instructions

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