DGH MS 2000 User manual

MS2000
Electronic Steam
Humidifiers
MiniSteam
Residential
Owner’s
Manual
Read and Save
these Instructions

Systems, L.L.C.
Item Page
CONTENTS
Your MiniSteam steam humidifier will consist of:
INSTALLATION
MOUNTING THE HUMIDIFIER
MOUNTING THE STEAM NOZZLE
RUNNING THE STEAM HOSE.
PLUMBING
POWER WIRING
CONTROL WIRING
START UP AND CHECK OUT OF THE SD 2000 HUMIDIFIER
Startup Checklist
Startup Procedures
OPERATING YOUR MINISTEAM HUMIDIFIER
The MiniSteam Controller
The Main Control Board
MAINTENANCE
Cleaning the steam cylinder
Cleaning the fill and drain valves
ALARMS & FAULT CONDITIONS
Other Trouble-Shooting Hints
REPLACEMENT PARTS - BLOWER UNIT
REPLACEMENT PARTS - HUMIDIFIER UNIT
HUMIDIFIER WIRING DIAGRAM
TECHNICAL SPECIFICATIONS
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2
2
6
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10
11
13
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15
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Limited Warranty
All Products manufactured by DGH Systems, L.L.C. are warranted to the original purchaser to be free
from defects in materials and workmanship in the course of normal and reasonable use for a period of 2
years from the date of installation or 2 years and 1 month from the date of shipment, whichever comes first,
so long as the product has been installed and operated in accordance with all appropriate manuals and
wiring diagrams.
Any product or part that is found to be defective will, at the option of DGH Systems, L.L.C. be
replaced or repaired. DGH Systems, L.L.C. reserves the right to inspect any part or installation before
replacing or repairing defective parts. After startup of the product, labor for repairs or replacement of parts is
not covered by this warranty. Replacement of routinely replaceable parts such steam cylinders and gaskets
are not covered by this warranty.
DGH Systems, L.L.C. assumes no liability for consequential or inconsequential damage, or damage
due to negligence or improper use. Under the terms of this warranty, the original purchaser may have certain
legal rights and other rights which may vary from state to state.
1

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
For duct mounted applications
(Figure 1):
■1 Steam humidifier unit
■1 Duct steam nozzle
■10’ - 7/8” ID steam hose
■2 Steam hose clamps
■10’ - 5/16” ID condensate hose
■1 Condensate hose clamp
■1 HC-101 humidistat
■1 PC-301 air proving switch
■2 Fill cup extenders
■3 Screws and anchors
■1 Fill connector
For room mounted applications
(Figure 2):
■1 Steam humidifier unit with
blower attached
■1 HC-101 humidistat
■3 Screws and anchors
■1 Fill connector
IMPORTANT:
BEFORE beginning
installation:
■Check for shipping damage to
cartons. Mark the shipping waybill
accordingly.
■Open cartons and check for any
hidden damage. Mark the shipping
waybill accordingly.
■Check packing slip to insure all
items have been received. Notify
DGH immediately of any
shortages or damaged parts.
You
must notify DGH within 5
working days of any shortages.
2
Your MiniSteam steam humidifier will consist of:
Figure 1
Figure 2

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
1. Open the carton and carefully
remove the humidifier and
accessories.
2. Open the humidifier, using a flat
blade screwdriver, and remove the
mounting hardware and
accessories.
3. Remove the plastic steam
cylinder by loosening the clamp
on the top left of the cylinder and
lifting the cylinder while twisting it
up out of its base.
a. Disconnect the wires on
top by carefully loosening and
removing the plastic knobs
holding them in place.
Carefully use a pliers if
necessary to loosen the knobs.
CAUTION:
Do not squeeze
the pliers too hard, and turn
counter-clockwise only.
3
Installation - Mounting the Humidifier
Figure 3

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
4
4. Locate where you will install
the duct steam nozzle in the duct
(if used), and then decide on a
convenient location for the
humidifier, that will permit the
hoses to be sloped properly.
5. Use the mounting bracket to
mark the wall for drilling. Use a
level to insure the unit will hang
level. (See Figure 4 at right)
CAUTION:
make sure that the
screws will go into wall studs to
support the weight of the
humidifier.
6. If the mounting screws will be
screwed into wood, drill 2 -1/8"
pilot holes for the mounting
bracket. If dry wall, drill 2 -5/16"
holes for the anchors.
(See Figure 5 above)
7. Insert the screw anchors if
needed and then screw in the
mounting screws through the
bracket. The top edge of the
bracket should stand out away
from the wall.
(See Figure 6 above)
Figure 4
Figure 6
Figure 5

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
DIMENSIONS:
A=Clearance in front of
humidifier 36" (72" with blower)
B=Clearance to left side of
humidifier 12"
C=Clearance to right side of
humidifier 12"
D=Clearance to right side of
blower unit 12"
E=Clearance from top of blower
to ceiling 24"
F=Clearance from bottom of
humidifier to floor 12"
IMPORTANT:
Maximum length of
rubber steam hose is 20 feet.
10 feet is supplied with the
humidifier.
5
9. Remove the mounting bracket
from the back of the humidifier
Mount the humidifier unit as close
to the steam distributor pipe as
possible to minimize condensate.
Mount the humidifier unit below
the steam distributor pipe
whenever possible. Insure that a
slope can be maintained in the
steam hoses. Certain mounting
clearances must be maintained to
allow access for maintenance, and
for steam discharge from the
blower unit:
Figure 8
Figure 7

6
Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
10. Hang the humidifier unit
carefully on the mounting bracket.
(See Figure 9 at right)
11. Secure the bottom of the
humidifier unit to the wall using
the third screw.
(See Figure 10 at right)
Figure 9
Figure 10

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
12. Locate a suitable position for
the steam nozzle per Figure 11
at right.
a. Locate the nozzle at least
18" upstream of any duct
takeoffs or elbows.
b. If the steam nozzle is
installed from the bottom of
the duct, locate it in the center,
and cap off the condensate
outlet nipple.
12. Cut or drill a 2-1/2" hole in the
side of the duct to fit the steam
nozzle.
13. Apply silicone caulk to the
faceplate of the steam nozzle and
insert it into the duct with the 5/16"
outlet nipple at the bottom, as
shown in Figure 12 above.
14. Attach the steam nozzle to the
duct using #10 by 1/2" drill point
sheet metal screws (not included).
Be sure the nozzle is mounted
level, with the 5/16" outlet nipple at
the bottom.
(See Figure 13 above)
Installation - Mounting the Steam Nozzle
Figure 12
Figure 11 Figure 13
7

8
Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
CAUTION: 90% of all
operational problems with the
MiniSteam humidifier can be
traced to improper installation of
the steam hose. It is very critical
that steam be allowed to flow
freely from the humidifier unit to
the steam nozzle, and that
condensate can flow back.
■A 20% slope must be
maintained from the humidifier
unit to the steam nozzle. That
means the hose must slope up
2 1/2" for every foot of the
length of the steam hose.
■There must be NO sags,
kinks or low areas in the steam
hose that can collect
condensate or otherwise
restrict the steam flow.
■Copper tubing may be used
in place of the steam hose, but
it must be a minimum of 7/8"
ID and must be insulated.
DO NOT REDUCE THE SIZE
OF THE STEAM HOSE OR
PIPE.
16. Slip the end of the 7/8" ID
rubber steam hose over steam
nozzle inlet nipple and secure it
with the stainless steel hose clamp
supplied.
(See Figure 15 at right)
17. Slip the 5/16" ID condensate
hose over the steam nozzle
condensate outlet nipple and
secure it with the plastic hose
clamp supplied.
(See Figure 16 at right)
Installation - Running the Steam Hose
Figure 14
Figure 15
Figure 16

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
9
18. Bring the end of the steam
hose through the hole in the top of
the humidifier cabinet and slip the
end over the steam cylinder outlet.
Secure the hose using the stainless
the steel hose clamp supplied.
(See Figure 17 at right)
18. Reinstall the steam cylinder
into the humidifier unit by pressing
it down into the O-ring fitting at
the bottom, and then securing all
wires.
CAUTION:
Loose electrical
connections could cause fire, so
make sure all fittings are tight.
(See Figure 18 above)
20. Bring the end of the
condensate hose through the
smaller hole in the top of the
humidifier cabinet and cut it so it
ends in the drain pan of the
humidifier.
(See Figure 19 above)
Figure 17
Figure 18
Figure 19

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
10
IMPORTANT: Softened water
with conductivity less than 250
micromhos may be used. Raw
water is always recommended.
Demineralized water may
NOT be used.
21. Run 1/4" OD copper tubing
from the water source to the
bottom of the humidifier unit.
22. Attach the 1/4" OD copper
water tubing to the compression
fitting mounted in the plastic water
fill fitting. (See Figure 20 at right)
23. Attach the plastic fill fitting,
with the 1/4" OD copper tubing, to
the fill connection on the bottom
of the humidifier.
HAND TIGHTEN ONLY!
(See Figure 21 above)
24. Attach a 3/4" CPVC drain line
to drain fitting on bottom
humidifier unit, using PVC thread
sealant to insure a seal.
USE ONLY CPVC. Metal fittings
may crack the drain pan.
HAND TIGHTEN ONLY.
(See Figure 22 above)
Installation - Plumbing
Figure 20
Figure 22
Figure 21

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
25. Feed power wires through one
of the electrical inlets located
on the bottom of the humidifier
unit, and tighten the strain relief.
(See Figure 23 at right)
26. Insert the wires into the proper
power wiring terminals and tighten
all wires carefully.
CAUTION:
loose wires can cause
fires. Make sure power supply
matches unit label.
(See Figure 24 at right)
11
Installation - Power Wiring
Figure 23
Figure 24

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
12
28. Mounting the On/Off control
humidistat: mount the control
humidistat to an inside wall or
post in the area to be humidified.
Position it so that no drafts from
registers or outlets are blowing
on it.
Be sure that it is not placed over a
device that could generate heat or
vapor ie: stove, machinery,
cleaning vat. If an optional duct
humidity sensor is used, mount it
to the return duct only.
(See Figure 25 above)
27. Mounting the airflow switch:
Mount the airflow switch in the
supply or return duct using the
screws supplied.
Mount the device so that the
diaphragm is in a vertical position
as shown in Figure 25 below.
Drill a 7/16" hole in the side of the
duct and connect the supplied
tubing to the high pressure tap on
the airflow switch and then run it
through the drilled hole in the
duct.
Put no more than 2" of tubing into
the duct. Caulk around the tubing
where it enters the duct. The low
pressure tap is left open to
atmosphere. Reverse the taps if on
the return duct.
Installation - Control Wiring
Figure 25

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
29. Run control wiring from the
humidistat and air flow switch, to
the humidifier unit and enter one
of the electrical connection fittings
on the bottom of the humidifier
unit.
30. Tighten the strain relief
connector around the wires.
31. Connect the wires per one of
the following control wiring
diagrams, directly to the bottom of
the circuit board. Figure 26 is the
standard wiring diagram. If you
desire for the humidifier to
activate the heating fan whenever
there is a call for humidity, then
use the following control wiring
scheme instead. A small, 24 Vac
DPST relay will be needed.
(See Figure 27 below left)
13
Figure 26
Figure 27

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
Startup Checklist:
❑1. Water and drain lines are
connected properly. Fittings are
tight.
❑2. All power connections,
including internal ones, have been
checked to insure tightness.
❑3. Wires to the electrodes on
top of the cylinder are tight.
❑4. Steam and condensate
hoses are properly installed and
supported to prevent sags. Hose
clamps are tight.
❑5. Humidistat and air flow
switch are connected per the
instructions.
Startup Procedures:
1. Turn on water to the humidifier
and check for leaks in the piping.
2. With the humidifier On/Off
switch in the OFF position, turn on
power to the humidifier.
3. Set the humidifier On/Off
switch to the ON position.
4. Set the humidistat setpoint
above the room humidity.
5. After the ON LED lights up,
the FILL LED should light up 15
seconds later, and the unit should
open the fill valve and begin to fill
with water.
Filling should stop when either the
proper amperage is reached, or the
cylinder is full of water. After a
few minutes, water should start to
boil and steam should be
produced.
Startup with low conductivity
water: When the water
conductivity is less than 100
micromhos, there is not enough
conductance in the water for the
humidifier to reach even low
capacity. In this case, the
humidifier will fill completely full,
but after 10 minutes it will still not
reach a boil. In this case it is
necessary to “jump start” the
humidifier. Do this by turning the
unit off, removing the hose from
the top of the cylinder and drop in
a teaspoon full of salt or two Alka-
Seltzer to raise the water
conductivity. Once the unit is
brought to a boil, it will be able to
automatically take care of
maintaining the proper mineral
concentration. If the humidifier
loses output again within a few
hours, contact the factory for a
special low conductivity adapter
system.
DO NOT USE
DEMINERALIZED WATER.
14
Start up and Check out of the SD 2000 Humidifier

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
Sequence of Operation. (Figure
28) On a call for humidification,
the controller (R) will activate the
power contactor (A) in the
humidifier to put power to the
electrodes in the steam generating
cylinder (B). After a few seconds,
the fill valve (C) will be activated
for a minimum of several seconds
to admit water to the fill cup (V)
and read the conductivity (T). The
fill valve will remain open until
either the desired amperage draw
is reached or the water level
reaches the cylinder full probes
(E). Boiling will begin and steam
will flow to the duct distributor
pipes or to the Room Distribution
Unit. As water is boiled into
steam, the water level will reduce,
and so will the amperage draw.
When the amperage draw falls
below the required level, the fill
valve (C) will be opened and
water will be admitted to the
cylinder to increase the amperage
draw to the required level.
Periodically, based on the water
conductivity and the rate of
boiling, the controller will activate
the drain valve (S) for a short
period of time to drain some of the
mineral laden water away (S),
followed by activation of the fill
valve (C) to replenish and dilute
the water in the steam generating
cylinder.
15
Operating your MiniSteam Humidifier
Figure 28

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
Your MiniSteam humidifier has
one of the most advanced
controllers of any humidifier. It
automatically controls drain and
fill rates for the most efficient
operation possible.
The front of the controller provides
a graphic to show unit operation,
and three buttons to control
functions.
Setting Maximum Steam Output:
Press the UP key (#2 fig 29) until
the appropriate LED on the output
graph lights up. Once for 30%,
two times for 50%, three times for
75%, and four times for 100%.
This setting can be used to reduce
the output of the humidifier for
applications where the full output
may not be needed.
16
The MiniSteam Controller
The controller parts are:
1. RESET button to reset alarms. When an alarm
occurs, the LEDs will blink in a certain way (see the
trouble-shooting section of this manual), and the
RESET button will glow red.
2. Increase capacity button. Pressing this button
increases the capacity of the humidifier in
increments.
3. DRAIN button for manual drain selection.
Push and hold to force the unit to drain all water.
4. 30% steam output level indicator.
5. 50% steam output level indicator.
6. 75% steam output level indicator.
7. 100% steam output level indicator.
8. Unit humidifying indicator.
9. High water level indicator.
10. Unit filling indicator.
11. Unit draining indicator.
Figure 29

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
Inside your MiniSteam humidifier
is the main control board. It has
similar functions to the keypad on
the front of the unit.
Setting Maximum Steam Output:
Press the UP key until the
appropriate LED on the output
graph lights up. Once for 30%,
two times for 50%, three times for
75%, and four times for 100%.
This setting can be used to reduce
the output of the humidifier for
applications where the full output
may not be needed.
17
The Main Control Board
1. Connector for the front keypad
2. RESET button
3. DRAIN button for manual draining
4. UP button to increase capacity
5. Serial connection for “smart homes”
6. Amperage transformer
7. 30% steam output level indicator.
8. 50% steam output level indicator.
9. 75% steam output level indicator.
10. 100% steam output level indicator.
11. DIP switches to select signal input.
12. Configuration EEPROM.
13. Power relay.
14. Unit humidifying indicator.
15. High water level indicator.
16. Dehumidify indicator.
17. Alarm indicator.
18. Unit draining indicator.
19. Unit filling indicator.
20. Microprocessor.
21. Conductivity adjustment.
22. Terminal connectors.
Figure 30

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
Although your MiniSteam
humidifier is designed to take care
of its normal operation, and even
to provide you with diagnostic
capability, good operation always
means good maintenance.
Periodic cleaning or replacement
of the steam generating cylinder,
and cleaning of the fill and drain
valves is required as indicated by
the controller with a “worn out
cylinder alarm.
Also, at the end of each
humidification season, it is good
practice to shut off the humidifier
and manually drain the cylinder of
water to prevent premature rusting
and corrosion of the electrodes
during the nonuse season.
Cleaning the steam
cylinder:
1. Drain the steam cylinder of all
water by pressing and holding the
DRAIN button on the controller
until the cylinder is completely
empty.
2. Shut off the humidifier with the
On/Off switch on the front, and
disconnect power to the unit at the
external fused disconnect.
CAUTION:
If you have a blower
unit, there may be more than one
disconnect.
3. Loosen the hose clamp around
the steam hose on top of the steam
cylinder and remove the hose.
Loosen the steam cylinder hold-
down clamp.
4. Remove the power wires on
the top of the steam cylinder and
also the red cylinder full probe
connectors, and lift the steam
cylinder straight up out of the
drain fitting, and then out of the
humidifier.
5. To clean the cylinder, wash out
all heavy mineral by inverting the
cylinder and flushing water
through the bottom drain outlet.
Then fill the cylinder with either a
5% phosphoric acid solution
(humidifier cleaner), or a 50%
solution of Lime-Away . If the
electrodes are too badly corroded,
replace the entire steam cylinder.
6. Reinstall the cylinder in the
humidifier unit and connect all
wires, being sure to get them tight.
CAUTION:
loose cylinder wires
can become hot and melt the
cylinder or cause fires.
18
Maintenance

Systems, L.L.C.
MS2000
MiniSteam Residential
Owner’s Manual
After shutdown and removal of the
steam cylinder, shut off the water
supply to the humidifier,
disconnect the water supply and
remove the fill valve from the
humidifier. Remove the inlet
strainer by reaching up into the fill
valve inlet with a pair of needle
nose pliers and pulling out the
strainer by its tab. Clean the fill
valve and inlet strainer using the
same solution as used to clean the
steam humidifier, but DO NOT
soak the solenoid coil in fluid.
Reinstall the fill valve. (Figure 31)
WARNING: When cleaning the fill
valve, do NOT poke or probe flow
regulator with any object which
may enlarge the orifice. The flow
regulator must meter water flow
precisely or shortened cylinder
life may result.
Remove the drain valve group and
disassemble it. Clean all parts in
the same way as the fill valve,
reassemble and reinstall.
(Figure 32)
After cleaning and reassembly,
restart your humidifier according
to the Startup Instructions
contained in this manual.
19
Cleaning the fill and drain valves:
Figure 31
Figure 32
NOTE: It is highly recommended
to shut down and manually drain
the humidifier during any periods
of seasonal non-use. Allowing
water to remain in contact with
the electrodes for long periods of
time will promote premature
rusting and deterioration of the
electrodes. Algal growth in the
cylinder during periods of non-use
may also result in an odor being
produced on restart.