AI SERIES STEAM BOILER WITH T100 CONTROL
INSTALLATION INSTRUCTIONS
4211-195 1 04/19/18 Page 9
BOILER CIRCUIT BOARD SET-UP
The T100 will control the steam bath through the boiler’s T’STAT terminal
block. To ensure the T100 will function correctly, make sure the bath On/Off
control switch on the boiler’s circuit board is set with all positions down as
shown at right.
BOILER OPERATION
NOTE: When the boiler is started with an empty tank, the room steam valves
will open to release the air pressure created during water fill. Once the tank
has filled, the valves will operate normally, opening only when steam needs
to be released to a room to increase its temperature.Also, whenever a steam
valve opens to release steam to a room, the boiler heating is disabled for a
few seconds. This is designed to increase the elements’working life.
Set the BOILER OPERATION switch to the right (red showing) or set the
optional run clock to a “RUN” position. The BOILER ON light, both room
STEAM VALVE OPEN lights and the WATER VALVE OPEN light should turn
on, one heat contactor will close and the boiler will start filling with water. The water will become visible in the water gage a few seconds later. In
a short time, the feedwater valve and its light will turn off, the steam valve lights will turn off, the BOILER HEATING light will turn on and second
heating element contactor will close. The boiler will continue heating until it reaches its operating pressure of approximately 4 to 6 psi, then the
BOILER HEATING light and one contactor will turn off. During normal operation, the water level should always be visible in the lower half of the
gage glass.
Check for steam and water leaks. Repair any leaks before continuing.
Note: The boiler will operate a steam bath only while is it in RUN mode. The T100 does not sense if the boiler is running or not, so
the T100 will operate normally even if the boiler is turned off.
VERIFY T100 INSTALLATION
After all connections have been made, and the boiler operation verified (per previous section and the 4211-1631 boiler installation instructions),
make sure the T100 interface box is turned on (PWR light on) and power is turned on to the room light (if installed) and the boiler is set to RUN.
• On the boiler: the room steam valve should be closed and the ROOM STATUS lights should be off.
•At the Control: touch the bottom of the T100 screen to light the display. With the icon lit brightly on the display, press the OK switch. A
small should light below the T100 display, the interface board’s two lights should be lit (left light shows power is on, right light indicates
the steam room should be heating), the room steam valve should open and the boiler’s ROOM STATUS lights should light steadily.
• (Optional) Room Light (if installed): With the T100 display lit, press theT100’s switch. There should be a small icon lit below the
display and the room light should turn on.
If there are any blinking lights or other failures, recheck all connections. Contact Technical Support for assistance.
OPERATING INSTRUCTIONS
The AI boiler steam generation is based on two operating systems. The first is the boiler itself, maintaining water levels and boiling the water to
create steam for use in a steam bath. The second is the steam room control circuit, maintaining a comfortable steam bath by releasing steam
from the boiler only when needed to raise the temperature in the steam room. The boiler’s control circuit board is used for both systems so the
boiler must be running before starting a steam bath.And the boiler may run continuously without affecting the steam room temperature. In this
way the boiler can be left running so it is ready to produce steam immediately when the T100 is used to start a steam bath.
STEAM ROOM OPERATION
The steam room begins heating when the thermostat or room switch is used to “turn on” the steam bath. While the steam bath is on, steam is
released to the room as needed to bring the temperature up to the thermostat setting. When the boiler supplies two rooms, the rooms operate
identically but independently. Only one room will be described here.
TEMP
SENSOR
T’STAT
ROOM
SWITCH
REFRESH
SWITCH
