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to the board, the boiler capacity will modulate if the
outdoor air temperature is between -10˚C (14˚F) and
10˚C (50˚F) (see Figure 2 for more details on
modulation). If capacity modulation of the boiler is not
required for the application, do not proceed with the
installation of the outdoor sensor and leave the
terminals S1 and S2 unwired.
3.
Check if the dip switches "NUMBER OF ELEMENTS"
are in the proper position. Refer to Table 2 and Figure 1,
item D to determine the position of the dip switch, based
on the power rating;
4.
Turn on the power;
5.
Adjust room thermostat according to the required
temperature.
Table 2: Dip Switches Position
Dip switch
1
New Hydra
with
OFF
immersed
sensor
Number of
Dip switch 4
elements
3
OFF
4
OFF
5
6
Dip switch
6
Not used
OFF
3.2
CHECKING THE CONTROLS
Operational Controls
After having made sure that the boiler is completely filled
with water and that there is no call for heat, turn on the
power to the unit.
For this verification, disconnect the outdoor sensor from the
S1 and S2 terminals of the Hydra electronic board. As a
result, all the elements will remain functional, regardless of
the outside temperature;
Set the thermostat in the house to 30° C (85° F). The
circulator should start-up and the elements should start
sequentially, one by one (randomly), at approximately 15
second intervals. Pilot lights located on the control board
provide a visual check of the operation of the boiler;
The circulator stays on for as long as there is a call for heat;
By observing the temperature indicator, allow the water
temperature to rise to 60° C (140° F). Then, turn the electronic
Limit Control counter clockwise to 32° C (90° F). The
elements will stop sequentially, one by one, at 1 second
intervals between each. Now, the water temperature must be
adjusted with the "90° F - 120° F - 150° F - 180° F - 2 10° F" set
screw on the electronic board.
Once the verification is completed, reconnect the outdoor
sensor to S1 and S2 of the Hydra electronic board (if
required).
Dip switch
Dip switch
2
ON
ON
Dip switch 5
OFF
ON
ON
OFF
ON
ON
Dip switch
Dip switch
7
OFF
OFF
Mechanical High Limit Control
Use the same procedure as outlined in the preceding
paragraph, but now on the mechanical aquastat, located at
the center left of the control panel (see Figure 7, note 3).
This time the elements will all disengage at the same time.
The mechanical limit aquastat must be set 20° F abov e the
temperature on the electronic board.
Modulation Control
If an outdoor sensor has been installed as specified in
section 1.9.4, the overall capacity of your boiler will be
reduced upon an increase of the outdoor air temperature as
shown on Figure 2. The purpose of this feature is to
considerably reduce the number of heating cycles.
3.3
BCEH DUAL-ENERGY INSTALLATION
In order to obtain a special rate (DT rate) from your hydro-
electric power supplier on residential applications, your
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HYDRA boiler can be hooked-up to an existing oil heater.
Contact your Hydro office to find out if your property is
eligible to receive this rate and how to go about obtaining it.
BCEH dual-energy controls are specially designed to Hydro
standards. The BCEH control selects the least expensive
energy source, either oil or electricity, based on outside
temperature or a signal from Hydro.
The BCEH dual-energy control will start-up the oil burner
when the contact in the outdoor dual-energy sensor closes
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(due to a drop in temperature or other signal), even if the
thermostat in the house is not calling for heat. It will stop
when the temperature in the boiler reaches its target on the
Limit Control. Only in such a case is an anti-gravity valve
(flow check valve) or are motorized zone valves required.
A three-way motorized valve will direct the water flow either
to the oil fired heater or to your electric HYDRA boiler,
depending on the signal received from the outdoor dual-
energy sensor.
To install boiler, refer to Figures 7, 8, 9, and 10 and remove
jumper as shown on Figure 7, note 4.
4.0
MAINTENANCE
4.1
RESPONSIBILITIES
The property owner has the following responsibilities:
a.
To maintain the area around the boiler clean at all times
and free from combustible and highly flammable
material;
b.
To ensure that the ambient air at the boiler is not
excessively dusty or humid;
c.
To have all water leaks repaired in the system as they
arise;
d.
To ensure that the ambient temperature in the area
where the unit is installed does not exceed 27° C (8 0° F).
It is recommended that the boiler be purged annually, in
order to eliminate sediment and sludge that may have
accumulated at the bottom of the boiler and covered the
heating elements.
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