Honeywell HM512 Guide d'installation

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TrueSTEAMTM

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Tools needed to instal| TrueSTEAM O TrueSTEAM

Wire cutter/stripper O Mounting bracket and hardware

@ 1=3/4dn. diameter hole saw

1/8=in. drill bit

_, Standard screwdriver

18-gauge wire (up to 5 conductor)

Tot× driver 1"-20 and 1"-30

Other Requirements

TrueSTEAM flushes water at or above 140°F (6000).

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

TrueSTEAM if instaJJed in or above finished space.

Water filter and backflow preventer

(_ Saddle valve

Q Water supply hose

Drain hose (10 feet)

_) Duct nozzle and gasket

Owner's manual

Service label

Prestige HD color control*

TruelAQ control*

Humidity control*

VisionPRO IAQ control*

* Control based on model ordered.

69-2285EF-01

Contenu de cette bo_te

A Systeme TrueSTEAM

B Support de montage et visserie

O Vanne d'arr_t et dispositif

anti-refoulement

D Vanne _.6trier

E Tuyau d'alimentation en eau de

1/4 po

F Tuyau de vidange de 1/2 po

(3 m/10 pi)

G Buse de gaine et joint

H Guide du propri6taire

I Etiquette relative aux

r6parations

J Bas6 sur le modele command6,

inclut :

- Prestige HD (sans fil)

- TruelAQ

- R6gulateur d'humidit6 H8908

- R6gulateur VisionPRO IAQ

- Aucun r6gulateur dans

I'emballage

Outils n_cessaires (non fournis)

• Coupe-fil/outil _.d6nuder

• Trou de scie d'un diametre de

1 3/4 po

• Foret de 1/8 po

• Tournevis standard

= Fil de calibre 18 (jusqu'_.5

conducteurs)

= Entra_neur Torx T-20 et T-30

Autres e×igences

• Le systeme TrueSTEAM 6vacue

I'eau _.une temp6rature

de 140 °F (60 °C) ou plus.

Reportez-vous aux codes

Iocaux pour obtenir des

pratiques de vidange

ad6quates de I'eau chaude.

Service nominal de la pompe

_.condensats de (100 °C)

(212 °F), si une telle pompe est

utilis6e.

Plateau d'6coulement avec

d6tecteur de coupure d'eau en

dessous. Syst_me TrueSTEAM

si install6 dans ou au-dessus

d'un espace fini.

installation a distance

L'installation b_distance requiert

I'achat s6par6 du n6cessaire de

montage _.distance (n° 50024917).

LES DIRECTIVES D'INSTALLATION

COMMENCENT A LA PAGE 1

Safety Definitions and Precautions

Safety Definitions

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

Make sure you read and understand the following safety hazards before installing, using, or working

with the TrueSTEA M humidifier:

- 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 TrueSTEAM.

Scalding danger from draining water. When the water tank drai%, the water can be hot enough tc

cause njury. Make sure the homeowner understands tne danger of hot water and steam

A

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.

TrueSTEAM Humidification System 69-2285EF--01

Setting Homeowner Expectations

Make sure the homeowners know what to expect from their TrueSTEAM humidifier, 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 Hot Humidifying. If TrueSTEAM is not running but the humidity is below the setpoint, the humidity

control may have a frost protection setting. TrueSTEAM will not humidify while in a drain cycle mode.

Setpoint Not Reached. If humidity doesn't reach the setpoint, TrueSTEAM 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 TrueSTEAM 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 TrueSTEAM using the steps found in

the "Routine Maintenance" section on page 24, or in the Homeowner's Operating Manual. TrueSTEAM will

continue to run normally while this light is on.

Hard Water. The home's water hardness determines how often TrueSTEAM must be cleaned. A water

hardness test kit is provided with your TrueSTEAM. It will help you determine the cleaning interval and filter

requirements for your TrueSTEAM.

Energy Consumption. There may be a slight increase in overall energy consumption when operating

any humidifier. However, TrueSTEAM 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.

TrueSTEAM Humidification System 69-2285EF--01

Important Installation Requirements

Personal Safety

• Wear safety glasses while installing TrueSTEAM.

• Do not cut into any air conditioning or electrical line.

Follow professional safety standards and all local regulations.

Mounting Location

• Mount TrueSTEAM in a level position to avoid water damage or heating element failure.

Install TrueSTEAM on the supply duct. Use the Remote Mounting Kit if duct mounting is not possible.

Do not install TrueSTEAM 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 TrueSTEAM's weight when full of water (up to 15 Ibs.).

Choose a location that is well ventilated. Do not install TrueSTEAM in completely enclosed spaces, such as a

cabinet or unventilated closet.

Allow at least 1 foot clearance to ventilation holes in the TrueSTEAM cover. Do not cover the holes. Covering

them can increase the temperature inside TrueSTEAM 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 B: Parts List" on page 35.

If used near a pool or spa, make sure TrueSTEAM can not fall into the water or be splashed. Also, ensure

TrueSTEAM 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., floor 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 TrueSTEAM 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.

TrueSTEAM Humidification System 69-2285EF--01

Choosing a Mounting Method

Before installing TrueSTEAM in a home, you must decide which mounting method you want to use:

Which is right for you?

DUCT MOUNTING - if you can mount

TrueSTEAM 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 tlqe supply duct.

REMOTE MOUNTING - if a suitable

mounting location can not be found

on the supply duct:

• The TrueSTEAM 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 TrueSTEAM to the supply duct.

• You will need to use a remote mounting kit

_see "Appendix B: Parts List" on page 35).

This manual covers duct mounting of TrueSTEAM. For Remote Mounting Instructions, see "Appendix C: Remote

Installation" on page 36 or "Document 69-2317" (included with Remote Mounting Kit).

! have decided to use: [] Duct Mounting [] Remote Mounting

TrueSTEAM Humidification System 69-2285EF--01

Duct Mounting

h: ¸: : : : :: : : ! : : ::

Bef0re beginning Duct M0untingi

! have €0_firm÷d !0cal codeS ior proper draining practiCes for hot water

i have chosen an instal!ation 10cati0n that m÷ets the ieqUirementS 0n pag÷ 4

Follow these steps to mount TrueSTEAM 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

TrueSTEAM can be mounted.

M29598

Make sure there is a 120 VAC electrical outlet

rated for the TrueSTEAM model being installed.

TrueSTEAM Required Minimum

Modeh Circuit Capacity:

HM506 7 Amps

HM509 10 Amps

HM512 12 Amps

Ensure the location is near a drain with a high-

temperature water rating. Consult local plumbing

codes for proper drainage. If no main floor drain

is available, see "Appendix E: Advanced Draining"

on page 41.

STEP TWO: Connect the Duct Nozzle

Slide the foam gasket over the nozzle.

Make sure the o-ring gasket is properly seated

in the groove.

Insert the duct nozzle into TrueSTEAM. Twist

clockwise to ensure a tight seal.

TrueSTEAM Humidification System 69-2285EF--01

STEP THREE: Install Mounting Bracket to the Duct

M29600

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 TrueSTEAM onto the Mounting Bracket

Make sure the foam gasket is positioned correctly

over the nozzle.

Lift TrueSTEAM 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 TrueSTEAM to the bracket arms.

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 TrueSTEAM onto the mounting bracket

TrueSTEAM Humidification System 69-2285EF--01

Choosing the Proper Water Filter

[] I have compieted the duct mounting installation, including installing the duct nozz!e and securely

mounting TrueSTEAM t0the duct

TrueSTEAM uses a water tank to hold water in place as it is converted to steam. When water is boiled, the

dissolved minerals in the water (known as water hardness) fall out in solid form. This solid mineral fallout is

known as scale or sediment.

The quantity of scale or sediment and the time it takes to accumulate in the tank depends on the hardness of the

TrueSTEAM water supply. The harder the water, the more dissolved minerals it holds. This leads to faster solid

mineral accumulation in the tank.

Honeywell provides water filtration solutions that fit the needs of the home's water hardness. A water hardness

test kit is included with TrueSTEAM to assess which filter is needed.

STEP ONE: Test the Water Hardness

M29684

Fill the plastic tube with water directly from the

TrueSTEAM input water source.

Note: It is important to test the specific input to TrueSTEAM, 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.

TrueSTEAM Humidification System 69-2285EF--01

STEP TWO: interpret the Test Result

The color block will recommend the best water filter method for the home.

Which is right for you?

If water hardness is in range 1:

If water hardness is in range 2:

Honeywe recommends using the

polypr_osphate filter (sold separately).

,, /,

Proceed to Wate Supply and Drain

Connections" on page 10.

M296B1

Honeywell recommends using the Re Filtration

system _sold separately).

Note f the Re Filtratior System is not used, se[ [ne r or leowners

exue _tatlon In _ addl[ional cleaning Deyono once per season _VII

De necessary.

Proceed to "Water Supply and Drain

Connections" on page 10. See "Appendix F:

Reverse Osmosis Filter" on page 42 to install

the filter.

Honeywell recommends the home insta!l a

water Soiten er foi its water sup ply, water

hardness in this range negative!y affects

iaucetsl dishWashei% ShoWer headSl laundry

machines, and drains as well as TrueSTEAM. ....

: [

TrueSTEAM Humidification System 69-2285EF--01

Water Supply and Drain Connections

STEP ONE: Connect the Cold Water Supply

Use only cold water, Do not use hot water supply,

Insert one end of the water line into the water filter.

Use the 1/4-inch plastic water line provided or a

1/4-inch copper water line. Apply a modest pull to

ensure a tight fit.

Use clamps or ties to secure the water filter in a

location that allows for removing and replacing it in

the future. Honeywell recommends changing the

water filter annually.

Install the provided backflow preventer, as required

by code. See "Appendix F: Reverse Osmosis Filter"

on page 42 if using the Reverse Osmosis Filter.

t ut the water line so it is long enough to reach from

the water filter to the supply fitting on the bottom

of the TrueSTEAM.

,_ Insert the water line into the TrueSTEAM

supply fitting.

STEP TWO: Tap into a Water Line

Water Supply- k

Line _c:_

ManUvaallShutoff

T-fitting Saddle Valve

• Consult local codes for proper plumbing.

Use the saddle valve provided or a T-fitting 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.

lO TrueSTEAM Humidification System 69-2285EF--01

STEP THREE: Connect TrueSTEANI to the Water Pipe

Connect one end of the remaining length of water

line to the backflow preventer. Apply a modest pull to

ensure a tight fit. See "Appendix F: Reverse Osmosis

Filter" on page 42 if using the Reverse Osmosis Filter.

Connect the other end of this line to the saddle valve

or T-fitting 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 floor

drain using the rubber hose provided.

If direct floor drain access is not available, see

"Appendix E: Advanced Draining" on page 41.

Connect the 1/2-inch drain hose provided to the drain

fitting on the bottom of the TrueSTEAM.

Use the hose clamp provided to secure the drain hose

to the barbed fitting.

Route the drain hose to the floor drain. The hose must

have a continuous downward slope.

Direct the hose outlet into the floor drain. Secure

the hose to reduce the risk of hot water pooling

or splashing.

Before proceeding to Wiring:

[] I have confirmed minimum required circuit capacity

[] I have connected the water supply using cold water

[] I have installed the drain connection

TrueSTEAM Humidification System 69-2285EF--01

11

Before Wiring TrueSTEAM

TrueSTEAM wiring is different from evaporative pad humidifier wiring, in addition to solenoid water valve

actuation, TrueSTEAM can monitor system power and regulate system fan operation.

Using the DiP Switches

The wiring features are configured by DiP settings, which are described under the TrueSTEAM cover.

STEP ONE: Remove the TrueSTEAM Cover

Loosen the cover screw.

Slide cover out from front.

With the cover removed, you will see six DIP switches

to the left of the user interface panel. This manual

refers to DIPs 1-6 from left to right.

STEP TWO: Understand the DiP Switches

OR

Off

®®

DIPS 1 and 2 are used for maintenance.

DIP 1 and DIP 2: Together, these two DIPs specify

how often the automatic flush cycle is performed. See

"Set the Automatic Flush Cycle Timing" on page 13.

12 TrueSTEAM Humidification System 69-2285EF--01

On

Off

On

Off

On

Off

On

Off

k,!!.,,!' (_)

ii_iiiimiii!iiii!ii_!iiiii_ii_iiiiiiii!_iiiiiiiii!ii_iiii!iiiiii!iiiii!_iiiiiiiiii!ii!!!ii!iiiiI

_iiii_ii!i!_iii_i_i!iI_iiIiiiiii!iiF_i!iii_iii_i_iiii_i!_iiiIi_iii_iii_iiiiiiiiiiiii__ iiiiiii/!ii/iii/iiii/i

®

M29611

(_)

M29612

®

M29613

DIPS 3, 4, and 5 are used for humidifying.

DIP 3: Used to enable wireless operation.

* If DOWN (default), wireless terminal is disabled.

* If UP, wireless terminal is enabled.

DIP 4: Used to configure power monitoring.

* If DOWN (default), TrueSTEAM looks for R input

before allowing humidity.

* If UP, TrueSTEAM does not look for R Input before

allowing humidity. Power is still allowed to pass

through if R is wired. See "Make Power Monitoring

Decision" on page 14.

DIP 5: Used to configure back-up air

proving (optional).

* If DOWN (default), TrueSTEAM does not look for air

movement through an air proving device.

* If UP, TrueSTEAM looks for C connection before

allowing humidity. Wire an air proving device

between TrueSTEAM C and System C. See "Make

Add-On Air Proving Decision" on page 18.

Note: Setting DIP 5 up requires DIP 4 to be down. If DIP 4 is up, DIP 5

position will not be used.

DIP 6: Not used at this time.

STEP THREE: Set the Automatic Flush Cycle Timing

On

Off

On

Off

For soft water without

a softener or filter.

For water that is filtered through

the Honeywell RO Filter System.

For hard water without

a softener or filter.

M29614

For water that is put through

a softener before

entering TrueSTEAM.

* Use DIP 1 and DIP 2 to configure how often

TrueSTEAM will automatically flush the tank.

Timing for the automatic flush is based on hours of

active heating element time.

* The home's water hardness determines how often

automatic flushing should be performed.

* The automatic flush 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 24 for a description of

the automatic flushing process.

TrueSTEAM Humidification System 69-2285EF--01 13

Deciding on the Wiring Configuration

! t i t t i i ¸/t

Bef0ie making decisions ab0Ut Wiring c0nfiguiati0nsi

i undeistand when t0 use the DiP Switches and h0W t0 Setthem f0i the humidity C0ntio[

You need to decide on the configurations you will use before wiring the TrueSTEAM, These decisions will affect

how the connections are made, how the DIP switches are set, and how TrueSTEAM operates for the homeowner.

STEP ONE: Make Power Monitoring Decision

Power Monitoring is a configuration that allows TrueSTEAM to humidify only when it has confirmation that the

HVAC system transformer has power. This helps prevent steam from entering the supply duct when the HVAC

system is not operating. There are two ways to configure power monitoring, depending on the humidity

control used:

,, CONFIGURATION 1 - Using a thermostat with integrated humidity control

,, CONFIGURATION 2 - Using a humidistat separate from the thermostat

Which is right for you?

CONFIGURATION 1 -- using a thermostat

with an integrated humidity control such as

VisionPRO IAQ or Prestige -- is ideal for

contractors who:

[] Want simplified wiring - TrueSTEAM

only needs to be connected to the HUM

_erminals from the control.

• Provide integrated system and accessory

control in the living space.

[] Are using VisionPRO IAQ or

Prestige thermostat.

Proceed to "Wiring Basics: Conf_uration 1"

illustration at top of next page.

CONFIGURATION 2 u using a humidistat

separate from the thermostat such as H8908

or TruelAQ -- is ideal for contractors who:

[] Use a humidity control separate from

the thermostat.

[] Wish to locate the humidity control on the

return duct.

Proceed to "Wiring Basics: Configuration 2

illustration at bottom of next page.

14 TrueSTEAM Humidification System 69-2285EF--01

l

Note: This image is not a complete wiring diagram. It only depicts power monitoring.

See 'Wiring the TrueSTEAM" on page 19.

TrueSTEAM

HUM

Thermostat with

Humidity Control

R

C

HVAC System

WIRING BASICS: CONFIGURATION 1

When using a thermostat with integrated

humidity control (such as VisionPRO IAQ

or Prestige):

• The thermostat is powered by the

system transformer. In this configuration,

the thermostat must have power or

TrueSTEAM will not be able to

produce steam.

• Because the thermostat knows when the

system transformer has power, set DiP 4

to UP, so that it is not looking for an R input

from the system R.

l

Note: This image is not a cornpbte wiring diagram. It only depicts power monitoring.

See 'Wiring the TrueSTEAM" on page 19.

WIRING BASICS: CONFIGURATION 2

When using a humidistat separate from the

thermostat (such as H8908 or TruelAQ):

Humidity Control

TrueSTEAM HVAC System

TrueSTEAM generally supplies power

to the humidistat. In this configuration,

TrueSTEAM must monitor HVAC system

power to determine if humidity is allowed.

Leave DiP 4 in the DOWN position (factory

setting), and wire the HVAC system R and

C to the TrueSTEAM R and C. TrueSTEAM

will verify power is present before allowing

steam production.

TrueSTEAM Humidification System 69-2285EF--01

15

STEP TWO: Make System Fan Regulation Decision

System Fan Regulation is a configuration that requires TrueSTEAM to monitor the HVAC system fan and make

sure the fan is on if humidity is needed. This helps ensure that airflow will distribute humidity into the living space,

and prevents water condensation in the duct. There are two ways to configure system fan regulation, depending

on the humidity control used:

,, CONFIGURATION 1 - Using a thermostat with integrated humidity control

,, CONFIGURATION 2 - Using a humidistat separate from the thermostat

Which is right for you?

CONFIGURATION 1 -- using a thermostat

with an integrated humidity control such as

VisionPRO IAQ or Prestige -- is ideal for

contractors who:

• Want integrated control of the humidifier and

HVAC system in the living space.

[] Want the system fan to turn on immediately

upon a call for humidity.

CON F!GURATION 2 _Usinga humid!star

separatefrO"thethermostatsuchasN8908

or TruelAQ _ is ideal for contractors who:

useahumidityc0nti0_S÷parateiiom

!n

h°meTrueS_EAM_anca!_swi!!notbe

GF termina! un!i!

the water temperature reaches 176°F (just

Note: This feature Can be used with VisionPRO IAQ as well.

Proceed to "Wiring Basics: Configuration 1"

illustration at top of next page.

Proceed to !!Wiring Basics/ Configuration 211

illustration at bottom of next page. .........................

16 TrueSTEAM Humidification System 69-2285EF--01

l Note: This image is not a complete wiring diagram. It onJy depicts fan regulation. See[

i

'W@?_gthe TrueSTEAM" on page 19.

1

TrueSTEAM

HUM

f Thermostat with

Humidity Control

R

C

HVAC System

WIRING BASICS: CONFIGURATION 1

When using a thermostat with integrated

humidity control (such as VisionPRO iAQ

or Prestige):

• A thermostat controls the fan and

TrueSTEAM. The control will not allow

steam production unless the system fan

is on.

Wire Thermostat G to the HVAC system G

as normal.

Wire TrueSTEAM HUM terminals to the

system HUM terminals.

Note: This image is not a complete wiring diagram. It onJy depicts fan regulation. See|

i

'W@?_gthe TrueSTEAM" on page 19.

l

G

WIRING BASICS: CONFIGURATION 2

When using a humidistat separate from the

thermostat (such as Hsg08 or TrueiAQ):

TrueSTEAM

Humidity Control

HUM

GT

R

GF G

HVAC System

The external humidity control does

not monitor or control the system fan.

TrueSTEAM must confirm that the fan has

power before allowing humidity.

Break the thermostat G to HVAC system

G connection. Wire thermostat G to

TrueSTEAM GT. Wire TrueSTEAM GF to

HVAC system G.

Thermostat G calls will pass directly

through TrueSTEAM. If this signal is

not present, and humidity is needed,

TrueSTEAM will relay power from its RT

terminal to GF and out to HVAC system

G to ensure the fan has power for

humidity calls.

TrueSTEAM Humidification System 69-2285EF--01

17

STEP THREE: Make Add-On Air Proving Decision

In addition to monitoring system power and fan regulation, TrueSTEAM can monitor physical air movement

through an optional add-on air proving device. If an air proving device is added, TrueSTEAM can create steam

only if the fan is moving air through the supply duct.

[

Note: This image is not a complete wiring diagram. It onJy depicts add-on air proving.

See 'Wirir_g the TrueSTEAM" on page 19.

TrueSTEAM

HVAC System

R R

C C

WIRING BASICS

• Wire TrueSTEAM R and C to HVAC system

R and C with an air proving device in-line

on C.

Configure air proving through DiP 5 on

TrueSTEAM. Set DiP 5 up and keep

DiP 4 down.

TrueSTEAM will look for physical air

movement through its C connection before

steam enters the duct.

18 TrueSTEAM Humidification System 69-2285EF--01

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