2.6.3 Outdoor Sensor Connection
Mount the sensor on an outside wall, protected from
direct sunlight, so that it will accurately measure the
outside temperature. Install 2 #20 wires between the
outdoor sensor and the terminals identified as
EXT1
and
EXT2
inside the control panel of the boiler. This sensor
will allow the boiler to modulate its set point according to
the outdoor temperature, as per figure 3.
3 OPERATION
3.1 ADJUSTMENTS AND
START-UP
CAUTION
The boiler must be filled with water and all air purged
from the system, before turning on the power. If
the power is turned on before the boiler is filled with
water, the elements will become seriously damaged.
Warranty will be void.
1. Turn the power on.
2. Adjust the set point of the boiler on the electronic
control. See the electronic control section for
adjustments.
3. Set the thermostat at 30°C (85°F). The circulator
should start as well as the electrical elements in
sequence with a 15 seconds delay, if CMD displays
100% (see section 3.4.1).
4. The circulator stays on for as long as there is a
call for heat except if differently configured on the
electronic control, as explained in section 3.4.2.
3.2 OPERATING PRINCIPLE
The control activates the electrical elements. There is
a delay before turning on (2 minutes max.) or off (30
seconds max.) each individual element. When the set
point is reached, the number of activated elements will
be adjusted in order to maintain the water temperature,
while minimizing the on/off cycling. This allows for a
better longevity of all components and energy savings.
3.3 MECHANICAL HIGH LIMIT
3.3.1 Mechanical High Limit Control
The mechanical limit aquastat (big black knob) must
be set 30°F above the set point temperature on the
electronic control.
3.3.2 Manual Reset High Limit Control
Turn the power to the unit off before resetting the high
limit. The manual reset high limit is set at 100°C (212°F).
To reset this protection, the boiler needs to cool down.
Then the black button shall be pressed using a pen or
screwdriver. Refer to figure 4 to locate the high limit
thermodisc.
8
To Next Page
Loading...
