User’s Manual - Mascot II Boilers and Water Heaters
Page 5
proper gas supply. Wait 5 minutes and start the
unit again.
5.
Turn Mascot II on.
6.
After placing the appliance in operation, the
Burner Safety Shutoff Device must be tested
:
(a)
Close gas shutoff valve with burner operating.
(b)
Flame will go out and blower will continue to
run for the post purge cycle. One or three
additional attempts to light will follow including
pre-purge, ignitor on, valve/flame on and post
purge. Ignition will not occur as the gas is off.
The ignition control will lockout.
(c)
Open gas shutoff valve. Reset the boiler
control by pressing the
RESET
button on the
control or on the display. Restart the
appliance. The ignition sequence will start
again and the burner will start. The appliance
will return to its previous mode of operation.
Caution
Should any odor of gas be detected, or if the gas
burner does not appear to be functioning in a normal
manner, CLOSE MAIN SHUTOFF VALVE. Do not
shut off switch. Contact your heating contractor, gas
company, or factory representative.
2.2.2 Boiler Setup and Adjustment
1.
Measure the CO
2
in the flue products at high fire.
The Mascot II can be forced to high fire to allow
for easier setup. The CO
2
readings should be
between the values shown in
Table 2
. If the CO
2
is
not within the range shown, adjustments may be
made. To adjust the high fire CO
2
, locate the high fire
adjuster screw according to the appropriate figure.
Slowly make adjustments in 1/16 of a revolution
increments until the CO
2
is within the range
identified.
2.
Measure the CO
2
/O
2
in the flue products at low
fire. Mascot II can be forced to low fire to allow
for easier setup. CO
2
readings should be between
the values shown in
Table 2
. If the CO
2
is not
within the range shown, adjustments may be made.
To adjust the low fire CO
2
, locate the low fire
adjuster screw according to the appropriate figure.
Slowly make adjustments in 1/16 of a revolution
increments until the CO
2
is within the range
identified (see
Figure 3
).
3.
Repeat steps 1 and 2 to confirm that the CO
2
ranges are within the required ranges. Adjust if
necessary.
4.
If any of the measurements cannot be adjusted
to the specified ranges or the CO levels are
above 150ppm when adjusted please consult the
factory for further information.
WARNING
Improper adjustment may lead to poor combustion
quality, increasing the amount of carbon monoxide
produced. Excessive carbon monoxide levels may
lead to personal injury or death.
2.3 Shutting Down Mascot II
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
If freezing is anticipated, drain Mascot II and be
sure to also protect building piping from freezing.
All water must be removed from heat exchanger
and condensate trap or else damage from freezing
may occur.
This step to be performed by a qualified service person.
2.4 To Restart Mascot II
If drained, follow
Section 2.1
in this manual for
proper filling and purging.
1.
Turn off the main electrical disconnect switch.
2.
Close all manual gas valves.
3.
WAIT FIVE (5) MINUTES.
4.
Set the aquastat or thermostat to its lowest setting.
5.
Open all manual gas valves.
6.
Reset all safety switches (pressure switch, manual
reset high limit, etc.).
7.
Set the temperature controller to the desired
temperature setting and switch on electrical power.
8.
Burner will go through a prepurge period and
ignitor warm-up period, followed by ignition.
MENU ITEM
FUNCTION
RANGE
DEFAULT
Outlet water
Displays the current outlet
55-190°F
120°F
temperature
water temperature & allows
the setpoint to be adjusted
Inlet water
Displays the current inlet
—
—
temperature
water temperature
Delta T
Displays the current
—
—
temperature rise across
the heat exchanger
Stack
Displays the current stack
—
—
temperature
temperature
Outdoor
Displays the current outdoor
—
—
temperature
air temperature
Firing Rate
Displays an indicator of the
—
—
current firing rate based
upon fan RPM. The actual
firing rate may vary.
Table 1. User Mode Menu Structure.
