LAARS Pennant PNCV (Sizes 200, 300, 400) - Install and Operating Manual - Manual (Page 33)

LAARS Heating Systems
Page 32 Pennant 200, 300, 400 Page 33
for ignition. If the ignition control locks out, reset
by cycling the power off and on using the main
power switch on the right side of the cabinet.
6. When the unit is running, the supply gas pressure
must be checked. Inlet gas pressure must not
exceed 13 in. w.c. (3.2 kPa). The minimum inlet
gas pressure is 5 in. w.c. (1.2 kPa) and 8 in. w.c.
(2 kPa) for LP.
7. Once the inlet gas pressure is verified, the
outlet gas pressure from each valve (manifold
gas pressure) must be checked, and adjusted, if
necessary. The manifold gas pressure must be 3.0
in. w.c. (0.62 kPa) for natural gas and 9.0 in. w.c.
(2.2 kPa) for LP.
8. Complete the setup by checking the CO
2
at the
outlet of the unit. The CO
2
should be 8% for
natural gas, or 9.2% for LP.
9. After placing the appliance in operation, the
Burner Safety Shutoff Device must be tested .
To test:
(a) Close gas shutoff valve with burner
operating.
(b) The flame will go out and blower will
continue to run for the post purge cycle.
Three attempts to light will follow. Ignition
will not occur as the gas is off. The ignition
control will lockout, and will have to be
reset by cycling the power before the unit
will operate.
(c) Open gas shutoff valve. Restart the
appliance. The ignition sequence will
start again and the burner will start. The
appliance will return to its previous mode
of operation.
6.7.2 High Altitude Adjustment and
Set-Up
High altitude adjustment must not be made on
appliances operating at elevations below 2500 ft. (762
m).
No orifice changes are required to adjust the
Pennant appliances for high altitude. High altitude
adjustment is accomplished by adjustment of the air
shutter. A CO
2
or O
2
analyzer is required to make these
adjustments.
Start the adjustment process by checking the CO
2
in the “as installed” condition. Adjust the air shutter(s)
so that the CO
2
is about 8% or the O
2
is about 6.8%
for appliances operating on natural gas. For appliances
operating on LP Gas adjust the air shutter(s) so that the
CO
2
is about 9.2% or the O
2
is about 6.8%.
If the appropriate CO
2
/ O
2
levels cannot be
achieved by adjusting the air shutter. Contact the
Technical Services Department at (800) 900-9276.
The amount of derate will vary depending on
heating value of the fuel and the elevation at the
installation site.
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, and contact your heating contractor,
gas company, or factory representative.
Attention
Si vous sentez une odeur de gaz ou si le brûleur
à gaz ne parait pas fonctionner de manière
normale, fermez la vanne d’isolement, ne fermez
aucun interrupteur, et appelez votre entreprise de
chauffage, la compagnie de gaz ou un représentant
du fabricant..
6.8 Shutting Down the Pennant
1. Switch off the main electrical disconnect switch.
2. Close all manual gas valves.
3. If freezing is anticipated, drain the Pennant and
be sure to also protect building piping from
freezing.
This step to be performed by a qualified
service person.
6.9 To Restart the Pennant
If drained, follow Section 6.1 in this manual for
proper filling and purging.
1. Switch 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 pre-purge period and
ignitor warm-up period, followed by ignition.
SECTION 7.
Maintenance
7.1 System Maintenance
1. Lubricate the system water-circulating pump, if
required, per the instructions on the pump.
2. If a strainer is employed in a pressure reducing
valve or the piping, clean it every six months.
3. Inspect the venting system for obstruction or
leakage at least once a year. Periodically clean
the screens in the vent terminal and combustion
air terminal (when used).