AI
SERIES STEAM BOILER WITH T100 CONTROL
INSTALLATION INSTRUCTIONS
4211-195 05-22-12
Page 11
ELECTRICAL (continued)
Connect the control circuit’s Neutral (208/240/415V models) or 120V+N (480V models) to the left side of the small terminal block provided in the genera-
tor’s electrical enclosure. Connect the power service to the boiler’s large terminal block and the ground to the boiler’s ground lug, located near the front
edge of the electrical enclosure (a copper wire clamping lug). Ensure all wires are tightly clamped at their respective terminals.
NOTE:
A GFI device is not required by UL. A GFI may be installed if required by local codes or the owner. A GFI device will tend to nuisance trip due to
heater element aging.
ROOM CONTROLS
Each steam valve outlet is to be used for a single steam room. Each room
requires one temperature sensor mounted in the room and one T100 room
control mounted inside or outside the steam room. The T100 and tempera-
ture sensor connect to a wall mounted interface box. The interface connects
to the circuit board in the boiler’s electrical enclosure.
To reduce the risk of
electrical interference between circuits, do not run the low voltage control
cables inside the same conduit as high voltage circuits. Avoid running
control cables closely alongside high voltage wiring in cable troughs and
raceways
.
Two independent control circuits are available for two steam outlets to sup-
ply two separate steam rooms. If only one valve is installed on the steam
boiler, it will be controlled by the ROOM 1 circuit with the T100’s interface
box connected to the T’STAT terminal block at the upper left edge of the
printed circuit board (PCA) located in the boiler’s electrical enclosure. When
the (optional) second steam outlet is provided, the second room’s control
interface connects to the T’STAT terminal block at the upper right edge of
the PCA in the same manner as the ROOM 1 circuit described here.
Follow
all wiring and PCA jumper setting instructions closely for proper operation.
1. INSTALL THE T100 INTERFACE BOX The T100’s interface box will be connected to the T100 control, the
room temperature sensor, and the steam boiler using the supplied 25 foot (7.6 m) cables. It also requires a
9VDC power adapter (provided) which connects to a nearby 120VAC or 230V~ outlet. Select a location which
is convenient to the boiler, power, control and temperature sensor then mount the box on the wall. This loca-
tion should be dry and keep the box safe from damage.
• Remove the box’s cover before mounting by gently pulling out on the sides of the box cover until it slides off.
• Locate the two mounting holes inside the box then use screws or other appropriate mounting methods to secure the box to the wall.
• Leave the cover off until all cables and power are connected and the installation has been shown to be working correctly.
2. TEMPERATURE SENSOR INSTALLATION
Before installing the sensor,
make sure it has a yellow band on the tubing on the back of the assembly. If
not, contact technical support at 1-800-363-0251 for assistance. The tempera-
ture sensor must be mounted in the steam room
. Cut a 7/8” (22 mm) diameter
hole in the steam room wall to mount the sensor. It is recommended that the
sensor be mounted 6” (152 mm) down from the ceiling, but not directly over the
steam dispersion head and not more than 7 feet (2.1 m) above the
fl
oor. Do
not cover or enclose the sensor: if the air
fl
ow across the sensor is blocked or
reduced, the room may overheat or suffer large temperature variations.
String the sensor cable from the sensor location through ½” (12 mm) holes in the wall studs or ceiling joists to the adapter box location. Leave 12” (300m)
of slack at the sensor location. Note:
Do not staple through or otherwise damage the cable. Use a factory supplied sensor cable only
.
In the steam room: Plug the temperature sensor into the sensor cable. The cable and the sensor connectors are designed to lock together when properly
aligned. Run a bead of 100% silicone caulk around the underside of the sensor head then carefully feed the cable and sensor through the hole and at-
tach the sensor in place.
At the interface box: Connect the sensor cable’s end plug into its socket on the box’s circuit board. The socket is directly above the board’s T100 jack.
Orient the cable end to match its socket and insert it until the end locks in place. Use a cable strain relief (provided) to secure the cable to the interface
box.
8
2
1
3
2
1
K1
J2
TB1
TB2
J1
K2
D2
R1
L1
L2
D1
T100
LOW VOLTAGE
ROOM LIGHT
BOILER T-STAT
SVC
JP1
HEAT
PWR
TEMP SENS
BOILER ELECTRICAL BOX
T100
AT TEMP SENSOR
INTERFACE
POWER ADAPTOR
LOW VOLTAGE
LIGHT
(OPTION)
BOILER TEMP SENSOR BYPAS
