SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
WARNING
Electrical grounding is required
on all Steam Generators.
All electrical supplies should be
disconnected when servicing a
Steam Generator.
(1) T100 Control plus
(2) or (3) AT or 3T
Steam generators
All wiring must be installed by a
licensed electrical contractor in
accordance with local and
national codes.
All plumbing must be installed
by a licensed plumber in
accordance with all applicable
local and national codes.
Generators are for indoor use only.
AMEREC STEAMBATH GENERATOR SYSTEMS
Generators are not for
space-heating purposes.
FOR USE WITH SYSTEMS INCORPORATING
ONE T100 CONTROL,
ONE AT OR 3T “MASTER” STEAM GENERATOR AND
ONE OR TWO AT OR 3T “SLAVED” GENERATOR(S)
Be certain that steam bath
enclosures are properly sealed
to avoid water damage from
escaping steam. It is
recommended that 100%
silicone caulk be used to seal
all pipes and fittings. Steam
must be prevented from
escaping into the wall cavity.
STANDARD MODELS CONSIST OF
AT17 = AT 10 + AT7 + T100 CONTROL KIT
AT20 = AT 10 + AT10 + T100 CONTROL KIT
AT30 = AT 10 + (2) AT10s + T100 CONTROL KIT
3T20 = 3T 10 + 3T10 + T100 CONTROL KIT
3T24 = 3T 12 + 3T12 + T100 CONTROL KIT
3T28 = 3T 14 + 3T14 + T100 CONTROL KIT
3T36 = 3T 12 + (2) 3T10 + T100 CONTROL KIT
Other system configurations may be available.
Contact technical support for further information: 1-800-363-0251
Never shut off the water to an
appliance that is in use.
Electric Shock Hazard
High Voltage exists within this equipment.
There are no user serviceable parts
in this equipment.
Save these instruction! Read all instructions carefully before installation!
POST ‘WARNING’ LABEL OUTSIDE STEAMBATH FOR SAFETY
WARNINGS! POSTING ON OR ADJACENT TO THE DOOR OF STEAM
ROOM IS REQUIRED FOR ALL COMMERCIAL INSTALLATIONS!
SECTION 1: GENERAL INFORMATION
Amerec Steam Generators are listed by ETL. The generators come assembled and ready for installation. Check
that the size and rating of the generators are suitable for your application; refer to Steam Room Construction and
Generator Sizing Guide (Amerec document 4211-33).
WARNING
REDUCE THE RISK OF
OVERHEATING AND SCALDING
1. Exit immediately if uncomfortable, dizzy or sleepy. Staying too long in
a heated area is capable of causing overheating.
2. Supervise children at all times.
3. Check with a doctor before use if pregnant, diabetic, in poor health or
under medical care.
4. Breathing heated air in conjunction with consumption of alcohol, drugs
or medication is capable of causing unconsciousness.
Do not contact steam head. Stay at least 12" away
from hot steam escaping from the steam outlet.
CAUTION!
REDUCE THE RISK OF
SLIPPING AND FALL INJURY
Use care when entering or exiting the steam room, floor may be slippery.
05-21-07
Amerec AT and 3T Steam Systems consist of one AT or 3T generator acting as a “master” generator which may
control one or two other AT or 3T slaved generators. The sole purpose of ganging generators is to increase the
volume of steam generated without using multiple controls. The master generator controls the slaved generator(s)
through the cable(s) provided.
4110-79
NOTE: For additional safety instructions, see owner's manual.
IMPORTANT
An exhaust fan installed outside the steam room is strongly recommended
to remove excess steam from the bathroom or shower area.
4211-103 10-10-11
Page 1
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
Table of Contents
Section
Description
Page
-
Important Safety Instructions
3
2
Select Mounting Location
4
3
Mounting the Steam Generator
4
4
Plumbing Instructions
5
Water Quality Requirements
6
Wiring Instructions
-
Electrical Information Chart
7
Operational Test
10
8
Service
11
-
Exploded Parts Diagram
12 - 13
-
Wiring Diagram
14 - 16
4211-103 10-10-11
5-8
8
8-9
9
Page 2
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS.
WARNING - To reduce the risk of injury, do not permit children to use this product unless they are closely supervised at all times.
WARNING - To reduce the risk of injury:
a. The wet surfaces of steam enclosures may be slippery. Use care when entering or leaving.
b. The steam head is hot. Do not touch the steam head and avoid the steam near the steam head.
c. Prolonged use of the steam system can excessively raise the internal human body temperature and impair the body’s
ability to regulate its internal temperature (hyperthermia). Limit your use of steam to 10 - 15 minutes until you are
certain of your body’s reaction.
d. Excessive temperatures have a high potential for causing fetal damage during the early months of pregnancy. Pregnant or
possibly pregnant women should consult a physician regarding correct exposure.
e. Obese persons and persons with a history of heart disease, low or high blood pressure, circulatory system problems, or
diabetes should consult a physician before using a steambath.
f. Persons using medication should consult a physician before using a steambath since some medication may induce
drowsiness while other medications may affect heart rate, blood pressure and circulation.
WARNING - Hyperthermia occurs when the internal temperature of the body reaches a level several degrees above the normal
body temperature of 98.6°F. The symptoms of hyperthermia include an increase in the internal temperature of the body, dizziness, lethargy,
drowsiness and fainting. The effects of hyperthermia include:
a. Failure to perceive heat
b. Failure to recognize the need to exit the steambath
c. Unawareness of impending risk
d. Fetal damage in pregnant women
e. Physical inability to exit the steambath
f. Unconsciousness
WARNING - The use of alcohol, drugs or medication can greatly increase the risk of hyperthermia.
SAVE THESE INSTRUCTIONS
4211-103 10-10-11
Page 3
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
WARNING
DIAGRAM 1
5’
5’
e, 2
abl
C
sor
en
pS
ab
2
le ,
Do not mount outdoors.
lC
ve
o
ntr
Co
Protect from freezing.
Sl a
Tem
a
lC
ble
,2
Unit must be located so as to
allow access for service.
5’
o
ntr
Co
SL AVE
ab
le ,
25
’
C
rol
T100
t
on
v
Sl a
eC
MASTER
SL AVE
SECTION 2: SELECT MOUNTING LOCATION
The steam generator will not operate
properly unless it is mounted level
with the arrows pointed up.
IMPORTANT
Before deciding on a mounting location,
please read through these installation
instructions completely and take a careful
look at al of the diagrams.
An exhaust fan installed outside the
steam room is strongly recommended
in order to remove excess steam
from the steambath or shower area
It is strongly recommended that no exhaust
fan be installed inside the steam room. Doing
so will result in a loss of heat and steam
through the exhaust fan and port.
The Amerec Steam Generator can be hung on a wall or set on it’s base. The best mounting location will
satisfy all or most of the following conditions:
1. The steam line should slope to allow condensation to drain into the steam room.
Insulate all steam lines and drain lines
2. The steam line should be less than 20 ft long. Ten feet is preferred. Steam lines over 20 ft long
within the enclosed space.
should be insulated.
Each generator must be provided with
3. The mounting location should minimize the number of bends and elbows in the steam line.
at least six (6) inches for wiring
4. The steam line should enter the room 18” above the floor or at least 12” above a tub rim or ledge.
access at the control wiring end.
5. No steam head shall be more than thirty (30) inches above the floor.
Each generator must be provided with at least
fifteen (15) inches clearance at the pipe end.
6. The steam outlet should be located to avoid potential user contact.
7. The generators should be installed in a dry, well ventilated area. The space provided should be at least:
There should be at least thirty-six (36) inches
in front of the louvered cover at
7 cu ft for one generator or 17 cu ft for two generators or 27 cu ft for three generators
each generator for service access.
Suggested locations are under a vanity, in a closet, attic, crawl space or basement. Preferably in the
same room. Note: The generator must be in an area protected from freezing.
8. The slave generators should be installed within a 25 foot cable length of the master generator and the master generator should be within a 25 foot cable length
of the T100 control installation. See diagram 1.
Note: Longer control and slave cables are available. Contact Technical Support at 1-800-363-0251 or support@amerec.com for assistance.
9. The installation should provide clearance for service and element removal. See diagram 3.
10. The mounting location should allow for a drain hookup. There should be no more than three 90° bends and 10 ft of pipe between any generator’s drain outlet
and its drain valve inlet. See diagram 15.
SECTION 3: MOUNTING THE GENERATORS
IMPORTANT: The generator must be level side to side and end to end after installation.
DIAGRAM 2
Wall Mounting:
Note the location of the mounting holes on the back of the steam generator. The screws must set directly into
studs or equivalent supports, Drill pilot holes on 12” centers and on level (see diag. 2 at right) then install the
two #10 1-1/2” screws provided.
12 in
Carefully hang the generator on the two screws. Tighten the screws. Replace the front cover. Secure the front
cover with its four sheet metal screws.
Floor Mounting:
In general, the width of the generator allows it to sit on a shelf, across ceiling joists or on a floor. The generator
must be on a flat surface and restrained from moving. Normally, the piping will provide adequate support but if
not, additional support must be provided.
All floor mounted generators must have provision for routine draining of the steam tank.
4211-103 10-10-11
Page 4
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
DIAGRAM 3: SERVICE CLEARANCE
36 in MIN
SERVICE
CLEARANCE
6 in MIN
6 in MIN
15 in MIN
SERVICE
CLEARANCE
15 in MIN
SERVICE CLEARANCE
DIAGRAM 4
DIAGRAM 5: WATER LINES
SHOWN WITH
OPTIONAL FILTER
(NOT PROVIDED)
SHOWN WITH
OPTIONAL
WATER FILTER
(NOT PROVIDED)
PREFERRED INSTALLATION
PREFERRED
SECTION 4: PLUMBING THE GENERATORS
All plumbing shall be installed by a licensed plumber and conform with local and
national codes.
Materials (locally available):
- 3/8” O.D. copper tube, shut off valves and compression to 3/8” male NPT
adapter for the water supplies to the generators.
- 1/2” copper pipe and unions for the steam lines to the steam rooms and
the tank drains.
- 3/4” copper pipe, fittings, and a union for the Pressure Relief Valve drain.
- Tube 100% silicone caulk.
- Pipe compound.
Note: other materials may be required.
IMPORTANT
Maximum recommended input water pressure not to exceed 100 PSI.
If the generators are mounted in a place difficult for the home
owner to access, the water supply shut-off valve should be
located where it can be quickly accessed in an emergency.
Do not use a saddle valve or saddle fitting for the water shut-off valve.
Flush water supply line before final hookup.
1. INSTALL WATER LINE See diagrams 4 and 5.
Run 3/8” copper tube between the nearest cold water line and the WATER INLET fitting on the generator. Locate a shut-off valve near the generator. Connect this
line to the generator with a 3/8” compression adapter. When tightening this fitting always use two wrenches so there will be no strain on the water inlet valve. For
better servicability, use a separate shut-off valve for each generator. See diagrams 3 and 4.
2. INSTALL STEAM LINE See diagrams 4 and 6.
At the Generator: Install a 1/2” male NPT sweat adaptor into the generator’s steam outlet. Install a 1/2” union in the steam line near the generator.
Run the 1/2” steam line from the generator to the steam room. Refer to SECTION 2: SELECT MOUNTING LOCATION.
The steam line should enter the room 18” above the floor or at least 12” above a tub rim or ledge.
4211-103 10-10-11
Page 5
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
DIAGRAM 6: STEAM LINES
SECTION 4: PLUMBING THE GENERATORS (continued)
2. INSTALL THE STEAM LINE (continued)
In the steam room: Drill/prepare a 1-3/8” dia. hole for the steam line entry. Center the 1/2” copper steam
pipe in the 1-3/8” hole. See diagrams 7and 8.
Terminate the steam line with a 1/2 NPT male adaptor. Stub the finished line out into the room 3/8” from
the finished surface.
Secure the steam line to a structural member.
3. INSTALL THE STEAM HEAD See diagrams 7, 8 and 9
Install the steam head insulator
Fill in the gap between the steam pipe and the finished wall using 100% silicone caulk.
Apply silicone to the wall side of the steam head insulator and screw the insulator onto the steam line
threads, hand tight, until it is flush against the finished wall with its opening facing down. If hand tight
does not result in the opening pointing down, use Teflon tape on the steam line’s thread to adjust the fit.
Mount the steam head
Slide the steam head onto the insulator until it rests firmly against the finished wall. Tighten the hex head
screw in the bottom of the steam head to secure it in place using the hex wrench, provided.
The steam head should be level with its fragrance reservoir at the top.
5. INSTALL THE AUTOMATIC DRAIN VALVE AND DRAIN LINE See examples in diagram 10.
The AT and 3T generators are provided with an electric drain valve to provide automatic draining and
rinsing of the steam tank after each steam bath. This can greatly extend the life of the steam generator,
particularly in areas with hard water. This valve must be installed within three feet of its generator.
1. Install the 3” nipple (provided) into the generator’s drain outlet then mount the drain valve to this nipple
with its conduit fitting pointing away from the generator. Notes: Conduit must be used in order to ground
the valve! The valve may be installed with either end towards the generator; select the orientation which
provides the best routing for the valve’s wiring conduit. No drain line should have more than three (3)
90° bends (elbows or tees) between the generator and its drain valve.
2. Use a 1/2” NPT close nipple to connect a 1/2” NPT Union onto the valve’s outlet.
3. Run a 1/2” drain line from the valve’s union to a suitable drain according to national and local codes.
This is a gravity flow drain so all drain lines must be sloped away from the generator towards the drain.
Notes:
Drain lines may be ganged together only AFTER each individual drain valve.
The drain must be constructed of materials capable of withstanding water at 212°F (100°C) and
be constructed according to local and national codes. Water at this temperature will present a
scald hazard!
Do Not run the drain into a shower or steam room or other area where someone may come into
contact with drain water without warning. This may present a scald hazard and may damage the
shower or steam room.
4211-103 10-10-11
WARNING
Do not put a shut-off valve in the steam line!
To reduce the risk of explosion,
do not interconnect steam outlets!
A separate line must be provided
for each steam outlet.
Avoid traps and valleys where water could
collect and cause a steam blockage.
The hot steam must be insulated against
user contact. Install the steam head so as to
avoid potential user contact.
Do not install the steam head near benches
or where condensation will drip on the user
or puddle as this will present a scald hazard.
The pressure relief valve must be installed
in such a manner that the risk of scalding is
reduced to a minimum. Draining the pressure
relief valve into the steam room may
present a scald hazard.
IMPORTANT
The steam pipe entry into the steam
room and the steam head must be
caulked to avoid damage caused
by steam leakage into the wall.
Centering the steam pipe is critical through
walls made of plastic, acrylic, resin, fiberglass,
or similar materials. Allowing the pipe to touch
the materials not rated for 212°F (100°C) or
higher will result in damage to these materials.
If the steam line is in an area where the
temperature will be below 40°F or if the line
is more than 20 feet long, best results can
be obtained by insulating the steam line.
Page 6
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
DIAGRAM 7: INSTALLING THE STEAM HEADS
1/2" NPT
Sweat Adapter
STUD
SPACER
3/8" from wall
Steam Head
1-3/8" Diameter hole
Center in opening
1/2" NPT Fitting
Steam Head Insulator
DIAGRAM 8: LOCATING THE STEAM HEADS
DIAGRAM 9: SEALING THE STEAM HEAD
6”
6” Min
Min
6” Min
Fragrance
Reservoir
6”
Min
Add silicone all around
the back of the insulator
before mounting.
6” Min
12”
Min
12”
Min
18”
Min
18”
Min
DIAGRAM 10: SOME TYPICAL DRAIN LINES
SECTION 4: PLUMBING THE GENERATORS (continued)
6. INSTALL THE PRESSURE RELIEF VALVE
Install the pressure relief valve into its port on the generator. Run a 3/4” copper pipe from the valve to an appropriate
drain. Do not connect the valve to the generator’s drain line! Install the valve according to local and national codes.
4211-103 10-10-11
Page 7
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
SECTION 4: PLUMBING THE GENERATORS (continued)
7. Water Quality Requirements
The nature of a steambath generator requires testing of the feedwater to avoid potentially high concentrations of impurities which can cause a deposit or scale to form on the internal surfaces. This deposit or scale can interfere with the equipment’s proper operation and even cause premature
failure. Concentration of impurities is generally controlled by treating the feedwater and/or “blowing down” the generator when it is not heating. The
blow down process involves removing a portion of the tank’s water with high solid concentration and replacing it with makeup water.
To ensure proper operation, the water supply should be tested prior to operating the equipment. There are several treatment processes which can
be used if you have a water quality problem. A local reliable water treatment company can
IMPORTANT
recommend the appropriate treatment if required. Recommended water quality is listed below:
Feed Water Quality
Hardness
10 - 30 ppm
(5.1 - 1.75 gpg)
T-Alkalinity
150 - 700 ppm
(8.75 - 40.8 gpg)
15 - 25 ppm
(1.28 - 1.45 gpg)
Silica Range
PH (strength of alkalinity)
SECTION
10.5 - 11.5
Regular maintenance will help your steamer
work properly for a long time. Check for leaks,
loose or damaged wires, signs of corrosion and
calcium build up in the tank and on the level probe.
This is particularly important in areas with high
calcium levels and other water quality problems.
Calcium buildup can cause poor steamer performance and damage the heating elements!
5: WIRING INSTRUCTIONS
1. T100 CONTROL CABLE ROUGH IN
The low voltage control can be mounted up to 25 feet from the generator either inside or outside the steam
room. A 25’ shielded 8 conductor cable (provided) is required for connecting the T100 control to the steam
generator. String the 25’ cable from the control location through 1/2” holes in the wall studs or ceiling joists
to the generator. Note: Do not staple through or damage cable. Use factory supplied cables only.
2. TEMPERATURE SENSOR CABLE ROUGH-IN
It is recommended that the sensor be mounted in the steam room 6” from the ceiling, but not directly over
the steam dispersion head or more than 7 feet above the floor. String the sensor cable from the sensor
location through 1/2” holes in the wall studs or ceiling joists to the generator location. Leave 12” of slack at
the sensor location. Note: Do not staple through or damage cable. Use factory supplied cables only.
3. ELECTRICAL ROUGH-IN
Size wire for each generator as indicated by the Electrical Information Chart on page 9. Use correct size
and type to meet electrical codes. Leave 4 feet of slack wire at generator location to finish hookup. Connect the generator to a dedicated circuit breaker.
4. ELECTRICAL FINISH
At the generator, route the copper supply wire with a 3/8” strain relief through the hole marked POWER
ENTRY. Connect the supply wires to terminals marked L1 and L2 (and L3 for three phase). Connect the
supply ground to the ground lug (green screw). Refer to the wire diagrams at the end of this document
for your model.
Note: AT12 and AT14 single phase units require two separate supplies. Refer to the electrical chart and
wire diagram when connecting these units.
WARNING
ELECTRICAL SHOCK HAZARD!
Hazardous voltage is exposed inside
the steam generator. Shut off all power
to the generator before servicing.
Supply electrical power through
copper wire rated 75C minimum.
IMPORTANT
A GFI device is not required by UL or NEC.
One may be installed if required by
local codes or the owner. A GFI device
will tend to nuisance trip due to
heater element aging.
To reduce the risk of electrical interference
from other devices, use only a shielded
cable to connect the T100 control
to the steam generator.
DIAGRAM 11: T100 CONTROL INSTALLATION
5. INSTALL T100 CONTROL
The low voltage control can be mounted directly to a finished wall either inside or outside the steam room.
Using the supplied template, cut a hole in the finished wall where the control is to be mounted (the control
cable should already be roughed-in to this location). Locate the control cable and plug it into the back of
the control housing. See diagram 11. Run a bead of 100% silicone caulk around the perimeter on the back
of the control housing. Insert the T100 into the finished wall, center the control and tape the control against
the finished wall while the silicone hardens.
6. INSTALL THE TEMPERATURE SENSOR
The temperature sensor should be mounted 6” below the ceiling, inside the steam room, but not directly
over the steam dispersion head or more than 7 feet above the floor. Using a 7/8” hole saw, drill a hole in
the finished wall where the sensor is to be mounted (the sensor cable should already be roughed-in to this
location). Locate the sensor cable, pull it out through the hole and plug it into the temperature sensor. It is
best to tape the sensor and cable connection together to avoid disconnection inside the wall. Apply silicone
caulk as shown in diagram 8 and insert the sensor in the hole.
4211-103 10-10-11
SILICONE ALL AROUND BACK OF RIM
Page 8
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
SECTION 5: WIRING INSTRUCTIONS (contrinued)
DIAGRAM 12: CABLING THE GENERATORS
TO 2nd SLAVE GENERATOR
MASTER GENERATOR
SLAVE GENERATOR
Make sure that the sensor probe is pointing down once installed. Tape the sensor in
Place while the silicone hardens. Route the generator end of the sensor cable through
the generator hole marked CONTROL WIRING ENTRY using the control cable strain
relief. Plug the sensor cable into the RM TEMP connector on the printed circuit board
assembly. See diagram 12.
DIAGRAM 13: TEMPERATURE SENSOR INSTALLATION
STEAM ROOM WALL
TEMPERATURE
SENSOR
SENSOR CABLE
6. WIRING THE GENERATOR CONTROL CABLES
Choose one generator to be your “Master” unit. This generator will control the other one
or two “slave” generators in the system. If the generators are not the same size (kW),
the largest wattage generator should be the master.
PROBE
MUST BE POINTED DOWN
7/8” HOLE
SILICONE CAULK
At the Master generator: Route the generator end of the control cable through the
generator hole marked CONTROL WIRING ENTRY using the strain relief provided.
Plug the control cable into the T100 metal shielded connector on the printed circuit board assembly. See diagram 12.
Connect a shielded control cable to the Master generator’s OUT1 jack and route this cable out the Master’s CONTROL WIRING ENTRY and into the first slave
generator though its CONTROL WIRING ENTRY hole. Connect this cable to the slave’s T100 jack. If a second slave generator is to be used, route another control
cable in the same manner from the Master’s OUT2 jack to the slave’s T100 jack. Note: If additional room is needed at the Master generator for routing the slave
cables, a knock out is provided next to the CONTROL WIRING hole. Secure all cables.
SECTION 6: ELECTRICAL INFORMATION CHART
NOMINAL WATTAGE
NOMINAL AMPERAGE
UL RECOMMENDED
PROTECTIVE DEVICE
MODEL
AC
VOLTAGE
PHASE
@208V
@240V
@208V
@240V
@208V
@240V
AT5
208/240V
1
3,750
5,000
18.0
21.0
25
30
AT7
208/240V
1
5,250
7,000
25.3
29.0
35
40
AT10
208/240V
1
7,500
10,000
36.1
41.5
50
60
AT12
208/240V
1**
9,000
12,000
28.8/14.4
33.3/16.7
40/20
50/25
AT14
208/240V
1**
10,500
14,000
32.5/18.0
37.5/20.8
50/25
50/30
3T8
208V
3
7,900
-
21.9
-
30
-
3T10
208V
3
10,100
-
28.1
-
35
-
3T12
208V
3
33,300
-
31.3
-
40
-
3T14
208V
3
14,500
-
40.2
-
50
-
* 208 VAC wired units must be supplied with a minimum of 195 VAC while operating (heating).
Unit is rated for copper wire only. All wire is UL approved 300V 75°C minimum unless otherwise specified.
** Single phase 12kW & 14kW require two separate line feed circuits.
4211-103 10-10-11
Page 9
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
SECTION 7: OPERATIONAL TEST After controls and slave generators are connected
After connecting the control, temperature sensor and slave generator(s) to the master generator:
1. Assure power and water are on.
2. Press the control’s ON/OFF switch. A light vibration should be felt in the control and the control’s display should light-up.
(see control instructions included with control kit)
3. Allow 10 minutes for the steam to start. The time to see steam start will vary depending on each generator’s power rating.
4. Once the steam starts, press the ON/OFF switch. The steam should stop; there shouldn’t be any water flow.
5. Press the ON/OFF switch.
6. Within one minute the units should again produce steam. The generators should call for water once every two minutes or more depending
on their power rating. It’s normal for the flow of steam out the steam head to slow for up to 10 seconds each time a unit calls for water.
7. The units will shut down automatically in 60 minutes. When the time runs out the steam will stop and there should not be any water flow.
8. If the units do not operate as described above, refer to SECTION 8: TROUBLESHOOTING GUIDE.
THE SYSTEM IS NOW READY FOR OPERATION.
SECTION
8: SERVICE
1. DESCRIPTION OF STEAM GENERATOR
The Printed Circuit Assembly (the “PCA”) provides the basic functions necessary to produce steam. The
PCA controls makeup water, provides a water level permissive for powering the elements and provides
raw DC power for the system. The PCA also provides regulated non-interruptible low voltage VDC power
for the T100 control and the temperature sensor. It also provides the interface circuitry between the control
and the PCA. The T100 control provides the room temperature control loop, an adjustable bath timer and
power switching for “soft steam”.
2. MAINTENANCE OF STEAM GENERATORS
- VISUAL INSPECTION - Whenever the generator is opened, inspect for any evidence of water leaks. I
nspect the wiring for any evidence of overheating. Check all electrical connections for tightness.
- FLUSH TANK - Flush monthly, or more often, depending on local water conditions.
- FLUSHING PROCEDURE:
1. The generator should be cool.
2. Press the ON/OFF button. The control should light.
3. Open the manual drain valve (if installed) and manually open the Autodrain valve by moving the lever
until it latches.
4. The unit will drain without heating the water.
WARNING
Electrical shock hazard!
Disconnect all electrical power
before servicing the generator.
All wiring should be installed by a licensed
electrical contractor in accordance with
local and national codes.
For continued safe operation use factory
authorized replacement parts only.
IMPORTANT
The PCA’s contain static sensitive devices.
Static electricity may damage PCA’s.
Handle accordingly
The blue wire connected to MAX on the
PCA must be connected to the shortest
of the three level probes, the black
wire (MID) to the long probe with black
tubing and the white wire (MIN) connected
to the longest probe with white tubing.
5. Allow the water to run for a full 10 minutes, then press the ON/OFF button. The control should turn off.
6. Allow the unit to drain completely. When the water stops, close the drain valves.
3. REPAIR OF GENERATORS
A. ELEMENT REPLACEMENT: Disconnect power from the unit. Drain the tank. Remove the front and HEATING ELEMENT ACCESS covers. Note the wire connections. (See diagrams 14 & 15) Remove the element wires. Using a hot water element socket, remove the element.
To install a new element, mount a new element gasket on the element. Clean the element port and add a light coat of Rectorseal No. 5 pipe thread compound
to the threads. Insert and hand tighten the element-gasket combination. Notice the element end orientation as shown in diagram. Tighten the element until the
orientation is the same as the diagram, ± 15°. The gasket should be set and tight but not deformed to a rounded or bulbous appearance. If the drain valve was
removed reinstall it. Reconnect the wiring. Test the unit per SECTION 7: OPERATIONAL TEST. Check for leaks at the element. Replace the front and HEATING
ELEMENT ACCESS covers. (Replace with factory supplied elements only)
B. PRINTED CIRCUIT REPLACEMENT: Printed circuit assembly (PCA) removal and replacement must be performed in the following sequence, any other
method can damage the PCA. (See diagram 16-19)
Disconnect power from the unit. Note and tag the positions of all wires that plug into the printed circuit assembly mounted relays. Remove all the wires from the
relays. When removing these wires, pull on the connector, not the wire. Note the blue connected to the shortest of the triple pronged water level probe rods and
the black wire connected to the rod with black tubing. Disconnect all three wires from the water level probe. Remove PCA from all five standoffs by pinching the
tops or removing the screws. When it is completely disconnected, it may be lifted out of the enclosure.
To install the board, reverse this procedure. The wire lugs must fit tightly onto the relay tabs! Test the unit per SECTION 7: OPERATIONAL TEST.
4211-103 10-10-11
Page 10
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
DIAGRAM 14
DIAGRAM 15: ELEMENT ALIGNMENT
DIAGRAM 16: LEVEL PROBE
Vertical + 15°
STEAM
OUTLET
Element End
Orientation
MIN
(White Wire)
NO VALVE
IN THIS LINE
MID
(Black Wire)
MAX
(Blue Wire)
PRESSURE
RELIEF
VALVE
INSTALL 10 PSI
VALVE PROVIDED
DRAIN
SECTION
INSTALL
VALVE
Gasket
Heating
Element
8: SERVICE (continued)
DIAGRAM 17
C. WATER SOLENOID REPLACEMENT:
Disconnect power from the unit. Turn the water supply OFF. Disconnect the water
supply from the water solenoid valve. Remove the front cover. Remove the two blue
wires from the water solenoid valve. Rotate the self-tightening hose clamp so it can
be loosened with a pair of pliers. Squeeze the clamp and move it down towards the
shelf and off the valve outlet tube. Remove the two 1/4” - 20 hex head bolts and lock
washers that attach the valve to the chassis. Pull the valve off the rubber fill hose. To
install the valve, reverse these instructions. Test the unit per SECTION 7: OPERATIONAL TEST.
PCA Power Relays Connections
3 versions available
Heating Element
Connections
Line Power
Connections
D. LEVEL PROBE REPLACEMENT:
Disconnect power from the unit. Remove the front cover. Note where the blue and
black wires are connected to the triple pronged water level probe. Disconnect all
three wires from the water level probe. Using a 1-1/4” box wrench, remove the level
probe. Install a new level probe. Use Teflon Tape on threads of probe if required.
Tighten until the bottom of the plastic nut is 1/8” to 3/8” inch above the top of the port.
See diagram 16. Reattach the three wires. Test the unit per SECTION 7: OPERATIONAL TEST.
DIAGRAM 18: PCA REMOVAL
DIAGRAM 19
Ref: Fast-On Lug
Note tab offset in
opening on relay
To remove the steamer PCA:
Remove the screw(s) from the metal standoff(s) then carefully lift up on the PCA near each nylon
stand-off as you use needle nose pliers to squeeze and release the locking tabs as needed.
4211-103 10-10-11
Page 11
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
3
39
34
33
36
23
15
29
35
28
11
16
9
12
44
1
43
7
4
13
2
24
17
18
5
22
6
20
8
19
14
4211-103 10-10-11
Page 12
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
ITEM
NUMBER
PART NAME
DESCRIPTION
1
FRAME
CHASSIS
2
TERMINAL
POWER INPUT TERMINAL BLOCK
3
COVER
FRONT WITH WD LABEL
4
COVER
ELEMENT ACCESS
5
TANK
TWO OR THREE ELEMENT
6
INSULATION
BLANKET
7
BRACKET
L-BRACKET
8
NIPPLE
DRAIN NIPPLE, 1/2” NPT
9
TERMINAL
AUTODRAIN TERMINAL BLOCK
11
CAP
CAP, THREAD PROTECTOR
12
LABEL
ID AND RATING LABEL WITH ETL MARK
13
PROBE
WATER LEVEL PROBE, 3 LEVEL
14
ELEMENT
IMMERSION ELEMENT
15
VALVE
WATER INLET VALVE
16
CLAMP
HOSE CLAMP, SELF TIGHTENING
17
GASKET
WATER INLET HOSE
18
BRACKET
HOSE CLAMP, AUGER
19
VALVE
DRAIN VALVE, MANUAL
20
GASKET
ELEMENT GASKET
21
BRACKET
MOUNTING BRACKET
22
VALVE
PRESSURE RELIEF VALVE
23
PCA
CIRCUIT BOARD, AT-3T STEAMER
24
LUG
GROUND LUG
28
BOLT
1/4-20 X 1/2”
29
WASHER
1/4” LOCK
33
CONTROL
T100
34
CABLE
8 CONDUCTOR CONTROL CABLE, SHIELDED
35
SENSOR
TEMPERATURE SENSOR
36
CABLE
2 CONDUCTOR TEMPERATURE SENSOR CABLE
37
STEAM HEAD
COMFORT FLO DISPERSION HEAD (NOT SHOWN)
38
PLACARD
SAFETY (NOT SHOWN)
39
LABEL
WIRE DIAGRAM
40
FUSE
FUSE, 100mA SLO-BLO
41
FUSE
FUSE, 1A FAST BLO
43
STANDOFF
PCA MOUNT, NYLON
44
STANDOFF
PCA MOUNT, HEX, ALUMINUM, 6-32
Technical Support
PO Box 2258
Woodinville, WA 98072
Phone 1-800-363-0251
FAX
425-951-1130
email: support@amerec.com
NOTE: 2 element single phase steamer shown, 3 element models are essentially identical.
FOR PARTS AND/OR RETURNS:
• For assistance or parts ordering, please contact your local Dealer or Technical Support at 1-800-363-0251. Please help us to serve you better by:
1. Identifying the problem by using the troubleshooting guide in this manual.
2. Read Number 12, the ID/Ratings Label, to obtain your unit's model and code number.
• When ordering parts, please provide the number, description and quantity needed. When ordering wires or wire assemblies, please describe the wires by color,
location and / or their connection points.
• Do not return any material without first contacting Technical Support for a Return Authorization Number. Freight must be prepaid to Factory.
4211-103 10-10-11
Page 13
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
LOW VOLTAGE LIGHT (OPTIONAL)
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
MASTER STEAMER
SLAVE STEAMER
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
4211-103 10-10-11
Page 14
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
LOW VOLTAGE LIGHT (OPTIONAL)
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
MASTER STEAMER
SLAVE STEAMER
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
4211-103 10-10-11
Page 15
SYSTEM INSTALLATION AND SERVICE
AT AND 3T STEAMERS
LOW VOLTAGE LIGHT (OPTIONAL)
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
MASTER STEAMER
SLAVE STEAMER
MAX
MID
MIN
RM TEMP
T100 CONTROL
OUT 2
OUT 1
4211-103 10-10-11
Page 16