Elite EL-110 LP, Руководство по установке

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43
Boiler Manual
PART 8: FIELD WIRING
(CONTINUED)
devices such as television sets that could
influence the ability of the thermostat to
measure room temperature.
3. If the thermostat is equipped with an
anticipator and it is connected directly to the
Elite Heating Boiler
®
, the anticipator should be
set at .1 amps. If the thermostat is connected
to other devices, the anticipator should be set
to match the power requirements of the
device it is connected to. See the instruction
manual of the connected devices for further
information.
F. OUTDOOR SENSOR
1. There is no connection required if an outdoor
sensor is not used in this installation.
3. Use a minimum 22 AWG wire for runs of 100
feet or less and minimum 18 AWG wire for
runs of up to 150 feet.
4. Mount the outdoor sensor on an exterior
surface of the building, preferably on the
north side in an area that will not be affected
by direct sunlight and will be exposed to
varying weather conditions. NOTE: Follow
instructions provided with the sensor for
correct mounting instructions.
G. INDIRECT SENSOR
1. There is no indirect sensor connection
required if an indirect water heater is not
used in the installation.
2. The Elite Heating Boiler
®
will operate an
indirect fired water heater with either a
thermostat type aquastat installed in the
indirect tank or an HTP 7250P-325 tank
sensor. When a tank sensor is used, the Elite
Heating Boiler
®
control will automatically
detect its presence and a demand for heat
from the indirect water heater will be
generated when the tank temperature falls
below the user set point by more than the
user selectable offset. The demand will
continue until the sensor measures that the
indirect water heater temperature is above
the set point.
3. Connect the indirect tank sensor (7250P-325)
to the terminals marked DHW SENSOR
(shown in figure 8-1) in the electrical junction
box.
H. OPTIONAL 0-10 VOLT BUILDING
CONTROL SIGNAL
1. A signal from a building management system
may be connected to the Elite Heating Boiler ®
to enable remote control. This signal should
be a 0-10 volt positive-going DC signal.
When this input is enabled using the installer
menu, a building control system can be used
to control either the set point temperature or
the heat output of the Elite Heating Boiler
® .
The control interprets the 0-10 volt signal as
follows; when the signal is between 0 and 1
volt, the Elite Heating Boiler
® will be in stand-
by mode, not firing. When the signal rises
above 1 volt, the Elite Heating Boiler
® will
ignite. As the signal continues to rise towards
its maximum of 10 volts, the Elite Heating
Boiler
® will increase either in set point
temperature or firing rate depending on the
setting of function 17 in the installer menu.
See Part 11 for details on the setting of
functions 16 and 17 for this option.
2. Connect a building management system or
other auxiliary control signal to the terminals
marked 0-10 VOLT + and 0-10 VOLT – in the
electrical junction box (shown in figure 8-1)
Caution should be used to ensure that the 0-
10 VOLT + connection does not become
connected to ground.
I. OPTIONAL UL353 LOW WATER CUT-OFF
INTERFACE KIT
If an optional UL 353 Low Water Cut-Off (LWCO)
Interface Kit is used, the control box of the kit
should be mounted to the left side of the boiler
cabinet near the low water cut-off probe, which
is located on the outlet nipple of the boiler.
Follow the complete instructions included in the
kit for proper installation.
J. WIRING OF CASCADE SYSTEM
COMMUNICATION BUS
1. Use standard CAT3 or CAT5 computer
network patch cables to connect the
CAUTION
Caution should be used to ensure neither of
these terminals become connected to ground.