TEMPERATURE /
PRESSURE GAUGE
This boiler is equipped with a dial type
temperature/pressure gauge. This gauge is
factory installed in the outlet side of the heat
exchanger. The gauge has one scale for
reading system pressure and a separate scale
for water temperature in degrees Fahrenheit.
BOILER OPERATING
TEMPERATURE CONTROL
In the absence of a remote temperature
control, a dial operator controls the boiler
operating temperature. The sensing element
for the operator is placed in a bulb well,
installed in the inlet side of the heat
exchanger front header. Due to the location
of the temperature sensor, the operator will
generally require a lower temperature
setpoint to achieve the desired discharge
water temperature from the boiler. This
sensing element location allows a boiler
operating with a low to moderate flow rate to
sustain longer burner “ON” cycles, based on
high discharge water temperatures.
For example, a boiler operating with a 180°F
discharge and a 20°F temperature rise would
require approximately a 160°F to 165°F set
point with the temperature sensor installed on
the inlet side of the heat exchanger. The exact
temperature set point is based on system
requirements.
REMOTE TEMPERATURE
CONTROL, CONNECTION
TO TERMINAL STRIP
A remote temperature control may be
connected to the boiler. The boiler is
equipped with a terminal strip to allow
easy connection. Connection to the terminal
strip will allow the remote temperature control
to make and break the 24 VAC boiler control
circuit, turning the boiler on and off based on
building and system demands.
ELECTRICAL
REQUIREMENTS
(North America)
The appliance is wired for 120 volts.
All wiring between the unit and field
installed devices shall be made of type
T wire [63°F (35°C) rise].
The pump
must
be wired to run
continuously when unit is firing.
It is recommended that the boiler and
pump be wired on separate circuits with
properly sized breakers.
CAUTION!
For proper operation
the system should not
be operated at less
than 12 PSIG.
1.
2.
3.
(TABLE L) – AMP DRAW DATA
MODEL
FAN
CONTROLS
APPRX. TOTAL
NUMBER
AMPS @ 120 VAC
EB150-300
1.2
4.0
5.12
NOTE:
When the unit is
installed in Canada, it
must conform to the
CAE
C22.1, Canadian
Electrical Code, Part 1
and/or local Electrical
Codes.
L o c h i n v a r
D E S I G N E R
’
S
G U I D E
E F F I C I E N C Y
+
B O I L E R
6 1 5 - 8 8 9 - 8 9 0 0
19
