Field Controls S2000 User Manual

MODELS S2000 AND S2020

Copyright © 2011 Field Controls All Rights Reserved.

The Residential Power Humidifier you have purchased

FIELD CONTROLS ELECTRONIC STEAM UNIT - POWER HUMIDIFIER

P/N 090375A0227 Rev. M

10/2011

&

Instructions

Owner's

Manual

Installation

FOR GAS OR OIL FORCED AIR FURNACES, HEAT PUMPS AND ELECTRIC FURNACES

has been designed to be simple to Install, Operate and Maintain.

Read this manual before you install the Humidifier.

This symbol on
the product means
the product is
listed by
Underwriters
Laboratories, Inc.

Familiarizing yourself with the items listed in Figures 1
and 2 will assist you in installing and maintaining your
Steam Power Humidifier. This product should be installed
according to local and national codes and standards.

WATER INLET

WATER LEVEL
PROBE

HEATER

TEMPERATURE PROBE

FIG. 1

Parts included in the Steam Humidifier package are:

1. Self Piercing Saddle Valve

2. Installation Instructions and Owners Manual

3. Mounting Templates x2

4. Installation Hardware package

5. Insulation and tape

6. Automatic Drain Assembly

7. Humidistat - Model #062000 or 072000

8. 1/2” I.D. Drain Hose-8 FT.

9. Anode #Z100

WATER PAN

TANK BAFFLE

WATER INLET
FOR DRAIN
VALVE DETAILS
See Page 12

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INTERLOCK &

HUMIDISTAT CONN.

OVERFLOW

"T" ADAPTER

STATUS LIGHTS

AUTO DRAIN CONN.

MANUAL WATER DRAIN

Options and additional parts recommended:

1. Water Hammer Arrester #WH 100

2. Anode #Z100

3. Decorative Under Duct Cover # SC100

4. Gasket Material to seal flanges (field provided)

5. Model APD Current Sensing Switch, Sail Switch or
other Airflow Proving Device.

6. WFA-195 Water Filter Assembly

BLOWER

FIG. 2

1

SIMPLIFIED INSTALLATION INSTRUCTIONS

1. Insulate the water reservoir. See figure 3.

2. Select the mounting location on the duct and tape
on the mounting template.

3. Drill the (8) 1/8" mountings holes.

4. Cut out the humidifier opening in the duct.

5. Insert the humidifier into the opening and screw in
place.

6. Flush and connect the water line.

7. Connect the drain line.

8. Make 24 VAC electrical connections to achieve fan
operation and interlock circuit.

9. Install and connect the humidistat.

10. Plug power cord into a grounded dedicated 120 VAC, 20
amp outlet for S2000 (240 VAC, 15 amp for S2020).

DETAILED INSTALLATION INSTRUCTIONS

1. INSULATE WATER TANK RESERVOIR

With insulation foil side down, remove adhesive backing.
Align humidifier so that front side of unit meets long edge of
insulation. Fold insulation up onto sides of humidifier and
press firmly. Apply 5 continuous strips from the tape
provided to seal the foil as shown. The tape will prevent the
sharp duct edges from damaging the foil. Use additional foil
tape to repair damage to the foil. The Insulation MUST be

applied to the tank regardless of the mounting location.

INSULATION
(FOIL SIDE OUT)

USE TAPE TO SEAL THE FOIL
TO THE FRONT MOUNTING PLATE
(3 PLACES-SIDES AND BOTTOM)

FIG. 3

USE TAPE TO SEAL
THE OUTSIDE EDGE
OF THE FOIL
(2 PLACES)

2. LOCATION-LOCATION - Required Criteria

DO NOT INSTALL this unit in an attic period. Do Not
Install this unit in any area that may fall below 35
degrees F. Doing so will void your warranty! The steam

humidifier can be installed in either the warm air supply or the
cold air return ducts; however the preferred location would be
in the warm air supply duct of the system. This humidifier does
not require warm air to evaporate the water in order to provide
humidity, but it will operate more efficiently in the warm air duct
and condensation is less likely to occur on the surrounding cold
surfaces. Efficiency is lost in a return air duct location.

When selecting a location on the duct, be certain that there is
enough room in the duct for the water reservoir. There should be
at least five (5) inches above the reservoir and the reservoir
should not occupy more than about 25 percent of the duct space.
If this criteria can not be met, you should install the unit under
the duct by means of the tank flange. See page 6.

If a suitable means of gravity draining the unit is not available
or cannot be provided, the unit will work with the drain valve
electrically disconnected. Call the Technical Support Hotline
for Instructions.

It is highly recommended but not required that the
use of Fiberglass duct-board with this product
includes an anti-microbial treatment.

3. WEIGHT - Required Criteria

Providing Adequate Structural Support for this unit is the
responsibility of the Installer. It is recommended to
reinforce the cut openings with folded lengths of sheet­metal to provide rigidity to the duct opening. Now the
screws must pass through 3 layers of metal when inserted.

DO NOT install this unit into fiberglass duct without
adequate structura l support ! Both models weigh

approximately 9 lbs. empty and 15lbs. full of water.

4. MOUNTING TEMPLATE

Two mounting templates are provided. Choose the correct
template for your mounting method. Tape the mounting
template to the duct. The template must be leveled using the
top of the cutout on the template. The template should be
located so that the bottom of the reservoir cut-out is flush with
the inside of the bottom of the duct for horizontal duct. Since
most ducts are insulated this additional space, about one (1)
inch, must be accounted for when determining the location
for the bottom of the reservoir cut-out. If you are mounting it
under the duct, make sure the duct is level.

5. DRILL HOLES AND CUT OPENINGS

Use an electric drill, with grounded power cord, to drill eight
(8) mounting holes, 1/8" diameter, in the duct. These can be
drilled through the template at the locations indicated on the
template.

A saber saw or tin snips can be used to cut out the water
reservoir opening.

Insert and/or mount the Humidifier and secure it to the duct
with the provided screws.

CUT ON LINE

MOUNTING TEMPLATE

MODEL S2000 & S2020

CUT ON LINE

1. TAPE TEMPLATE IN LEVEL POSITION.

2. DRILL (8) HOLES FOR SHEET METAL SCREWS

SHOWN ON TEMPLATE (DO NOT DRILL LARGER

THAN 1/8" DIAMETER.

3. CUT OUT SOLID LINE AREA AS MARKED.

4. MOUNT HUMIDIFIER PER INSTRUCTIONS.

CUT ON LINE

2

CUT ON LINE

FIG. 4

P/N 094021B0037

6. WATER SUPPLY - Required Criteria

A. WATER SUPPLY USING THE SADDLE VALVE
FURNISHED WITH UNIT. Important! See page 14.

Installation instructions for the saddle valve are printed on the
plastic bag containing the saddle valve and its components.
Tap into a 1/2” or 3/4” domestic cold water line. Avoid
connecting to water lines from a Reverse Osmosis system or
De-ionized water systems. The supply water must read a

minimum of 25 ppm in order for the Steam unit to reliably
sense the water.

NOTE: Never install the saddle valve on the bottom of the
water pipe. Sediment in the water pipe may clog the saddle
valve. Flush the line before connecting to the unit.

tightening the hex compression nut, tighten only enough to
assure there are no leaks.

NOTE: Saddle valves do not meet plumbing codes in some
areas. A “T” fitting with a valve may be required to meet code
or, if low water pressure causes frequent water alerts on the
steam humidifier. NOTE: Flush the new water line before

connecting it.

NOTE: The use of City water or Municipal water is preferred.
Softened water is preferred over untreated well water. Specify

the Optional WFA-195 disposable water filter for treating
any water supply that is very high in mineral content.

NOTE: Use a water hammer arrester (WH-100) if water

spikes occur (pipes bang)during fill ups.

B. OVERFLOW & DRAIN LINES - Required Criteria

The use of an overflow line and drain line is always required.

Use the supplied 1/2” ID high temperature hose. Slip the hose
over the 1/2” OD “T” drain fitting and use a hose clamp to
secure. Route the hose to a suitable drain, avoiding kinks,

traps and sharp objects. DO NOT route the hose above the
humidifier. Failure to install all necessary drain lines may
result in water leaks during normal operating conditions,
and voids all warranties.

When routing the S2000 drain hose into a condensate pump,
be sure to cut the end of the hose at a sharp angle to prevent
the hose from bottoming out in the pan. It could result in
poor draining or no draining at all. Failure to do so may
result in water backing up into the S2000 reservoir and
eventual overflow. See Figure 5.

DRAIN

CORRECT

HOSE

INCORRECT

CONDENSATE
PUMP

X

FIG. 5

7. M OUNTING THE STEAM HUMIDIFIER

Use gasket material to seal where the front plate or tank flange
contacts the duct-work. Place the humidifier reservoir into the
opening in the duct and secure with eight (8) sheet metal
screws.

NOTE: If the duct-work will not support the unit in a level
position with the water pan full of water, the duct-work
must b e reinfo rced. B oth steam mode ls weigh
approximately 9 Lbs. empty and approximately 15 Lbs.
when full of water.

When

8. STEAM OPERATION - Required Criteria

Because of the high output of this Humidifier, it must not be
operated without the blower operating. The steam
humidifier is designed to be "Dominant" over the HVAC
System Blower. The "System" Blower will be operated by the
humidifier when the water tank temperature reaches 170
degrees F. A minimum of 800 cfm @ 800-900 fpm is required for

proper operation of the steam humidifier. Lower velocities may
result in excessive condensation inside the duct. See Air Proving
Feature on the next column! See Variable Speed on Page 7.

A temperature sensor is mounted in the water reservoir of the
humidifier. As the water temperature increases to about 170
degrees F, the computer closes a set of blower relay contacts to
start the system fan. When the water cools to about 140 degrees
F, the computer will open the relay contacts to shut off the fan.
This operational sequence drastically decreases the chances of
condensation occurring inside the duct-work.

9. WIRING THE STEAM HUMIDIFIER

IMPORTANT: Dedicated fused circuits and outlets of the
proper voltage and current ratings must be provided. Use a

NEMA 5-20R receptacle for the S2000 and a NEMA 6-15R
receptacle for the S2020. All wiring must conform to local and

national codes. Failure to do so will void all warranties.

DO NOT cut off the grounded plug and/or hard wire this unit to
line voltage! DO NOT use extension cords to operate this unit!
Doing so will void all warranties.

A. INSTALLING AND WIRING THE HUMIDISTAT

A humidistat, such as the Model #072000 is required to control
the Steam Humidifier. The humidistat may be installed on the
wall in the living space or on the return air duct. NOTE:

Continuos fan operation should be initiated if the humidistat is
installed on the return air duct! Instructions for installation are

packaged with each humidistat. Follow wiring instructions
carefully!

DO NOT connect any foreign voltage to the “H” terminals of the
humidifier! The Humidifier supplies it’s own control voltage.

Simply connect the two “H” terminals straight to any dry contact
humidistat terminals. If you are using a 3rd party Humidistat

that has powered terminals, you must use an isolating relay
to operate the Steam Humidifier. Failure to do so will result
in circuit board failure and will void all warranties.

B. FIELD WIRING

Schematics on the following pages describe the suggested
interlock wiring arrangement for different HVAC systems.
Interlocking may be performed on systems that provide a 24vac
NEC Class 2 terminal block for system control.

AIR PROVING FEATURE: The Steam Humidifier has an
integrated air proving feature that allows the user to install a sail
switch and/or high humidity switch in the duct and easily
achieve fail safe shutdown in the event of fan/blower failure.
This feature prevents the Steam Humidifier from operating
unless adequate airflow is proven thereby avoiding a saturated
duct condition. WARNING: It is highly recommended to use

an airflow proving device. In particular Duct-Board
applications should always use an airflow proving device.

A factory jumper wire is provided and must be removed when
connecting the sail switch or other field supplied air flow
proving device. Leave the jumper in place if you decide not to
use the airflow proving feature.

IMPORTANT NOTE: If the Steam Humidifier is removed
and disconnected from the system, the blower interlock
circuit must be restored to it's original configuration. Failure
to do so may result in loss of blower operation during cooling
modes!

3

CONTROL WIRING SOLUTIONS FOR VARIOUS HVAC SYSTEMS

Conventional Heat & Cool System
and Steam Humidifier with 072000

with 072000 Humidistat

Heat Pump System and Steam Humidifier

The latest improvement to the Field Controls humidifiers is t he new
“Airflow Interlock Feature” provided on the low v oltage t erminal
block. Due to popular demand we have made it easier for you to
achieve fail safe lock out in the ev ent t he fan or blower on the
HVAC sys tem does not operate when called upon. A high humidity
or airflow proving device is necessary .

You must still determine the t ype of proving device you want to
use. We recommend our new Model APD switch. But then all you
have to do is connect two low v oltage wires from your air proving
device straight to the Steam Humidifier’s “A” terminals. No
additional field relays or components are needed.

The Steam Humidifier monitors the airflow circuit anytime it is
operating the blower on the HVAC syst em. If the Steam
Humidifier detec ts a loss of airflow longer than 1 minute, it will
shutdown the heating element and st op producing eam to avoid
saturating the duct.

You must test the air proving device when y ou install it to make
sure it will function properly. WARNING: DO NOT perform this test

with the wires connected to the St eam Humidifier. Temporarily
disconnect them. Refer to Figure 11.

1. After installing the air proving device, test for continuity across
the normally open contacts with the fan/blower off. You should
read infinity (no continuity) when the fan/blower is off.

2. Turn on the fan/blower at the thermostat and test for continuity
across the normally open contacts with the fan/blower running.
You should now read continuity (a complete circuit) when the
fan/blower is running.

Additional diagram shown on page 7.

FIG. 6

Heat only

Thermostat

WR

Typi ca l
Furnace

FIG. 8

Bryant Evolution
Furnace

FIG. 10

O

O

Typical Air Handler

FIG. 11

GWR

Bryant/Carrier Evolution/Infinity
Variable Speed Heat/Cool System

Bryant
Evolution
Thermostat

Thermostat with built-in

Humidification Control

W2

R

R

W2

Outdoor Heat Pump
not shown for clarity

Heat Only System and
Steam Humidifier with standard
dry contact Humidistat

S2000 & S2020 Humidifier
Low Voltage Terminal Block

G1 R G2 H H

Dry Contact
Humidistat

062000 Humidistat

NOTE: An APD or similar device
must be used in this application.
Wire the APD in series with the HH
circuit.

SPST Dry Contact
Isolating Relay
with 24vac Coil

C DBA

C DBA

2 4 va c
Common

Program Evolution

S2000 & S2020 Humidifier

T-stat as follows:

Low Voltage Terminal Block

1.Heating airflow
To Efficiency mode.

2.Humidifer
installed=Yes

3.Humidify with
Fan=Yes

4. Set FAN to
Continuous Mode &
select MEDIUM
speed.

HUM

G1 R G2 H H

DO NOT USE

Heat Pump System and Steam Humidifier with
Combo Thermostat/Humidistat
and Isolating Relay

S2000 & S2020 Humidifier

Low Voltage Terminal Block

G Y

G Y

HC

C

G1 R G2 H H

A

G1 R G2 H H

SPST Dry Contact
Isolating Relay
with 24vac Coil

Disconnect the wires from the “A”
terminals and check the device & circuit
with a reliable ohm meter. Check continuity
when the fan is off and when it is running.

A

A

Factory
Jumper will
stay in place
unless a field
installed Air
Proving Device
is used.

A

Leave Factory
Jumper in Place

Model APD or

Equivalent

A

REMOVE
FACTORY
JUMPER

Model APD or

Equivalent

FIG. 7

S2000 & S2020 Humidifier

Typical Thermostat

Outdoor

Temperature

Sensor

G YWR

G YWR

A

Typical Furnace

Low Voltage Terminal Block

C

C

G1 R G2 H H

OD OD C

R

H

H

072000 Humidistat

A

REMOVE
FACTORY
JUMPER

Model APD or

Equivalent

A

Refer to the 072000 Technical Bulletin

FIG. 9

S2000 & S2020 Humidifier

A

Typical Air Handler

Typical Heat Pump

Thermostat

W2

O

O

R

R

W2

Outdoor Heat Pump
not shown for clarity

G Y

G Y

Low Voltage Terminal Block

C

C

Outdoor

Temperature

Sensor

G1 R G2 H H

OD OD C

R

H

072000 Humidistat

A

A

REMOVE
FACTORY
JUMPER

Model APD or

Equivalent

H

Refer to the 072000 Technical Bulletin

blower on the HVAC system does not operate when called

A

operating the blower on the HVAC system. If the Steam
Humidifier detects a loss of airflow longer than 1 minute, it will
shutdown the heating element and stop producing steam to

across the normally open contacts with the fan/blower running.
fan/blower is running.

00.3
OHM

Model APD current
sensing switch or
equivalent air proving
device. Dry Contacts Close
when fan is running!

4

8

Copyright © 2011 Field Controls All Rights Reserved.

Field Controls Steam Humidifiers
Model S2000 & S2020
Dimensional Data

Figure 12 reflects the basic dimensions of the S2000 or S2020 Steam Humidifier. This data is useful in determining

.

0

0

00

”

”

6.
0

0
”

”

0

5

.

0

1

”

0

6

.

1

1

6

.

7.50”

Figure 12.

8

.

2

5

”

the room needed to install the unit in a certain location. The data can also be used to determine the minimum duct size the
Steam Humidifier can be inserted into. The Steam Humidifier should not obstruct more than 25% of the cross sectional area of
the selected duct. For Example: The humidifier tank measures 8 inches wide (including the flange) times the length of 11.6
inches=92.8 square inches. We are only concerned with the obstruction on a flat plane. Which is why the flange is taken into
account but not the depth of the tank. This assumes an up-flow configuration. If the configuration is horizontal, then the Steam
Humidifier will obstruct approximately 70 square inches of duct area. The tank flange is no longer a factor.

At 92.8 square inches, the smallest duct plenum that can accommodate the Steam Humidifier mounted internally would be
approximately 20” by 19”. 20x19=380 square inches multiplied by .25 = 95 square inches.

Steam Humidifier square inches of obstruction= 92.8 square inches. Up-flow configuration.
25 percent of 20x19 duct= 95 square inches.

Steam Humidifier square inches of obstruction= 69.6 square inches. Horizontal-flow configuration.
25 percent of 12x24 duct=72 square inches.

In either case, avoid installing the Steam Humidifier on any duct size where the unit will consume more than 25% of the cross
sectional area of the duct at the point of insertion. Doing so may result in turbulent airflow, lower velocities and condensation
inside the duct. Avoid all of these conditions by selecting an “under the duct” location and specify the SC100 decorative tank
cover to give it a finished look.

5