LAARS Heating Systems
Page 30
oAH – Maximum Setpoint
This is the maximum allowable calculated
setpoint, regardless of outdoor temperature.
Default is 190°F. Range is 90°F to 210°F.
rc – Reset Ratio
The ratio of air temperature movement to water
temperature movement. Sets the slope of the reset
curve. Default is 1.0. Range is from 0.5 to 5.0.
SP – Minimum Mixed Temperature
This setting is fixed at 125°F, and cannot be
change by the user.
Pd – Pump Delay
This is the time delay for the boiler’s mounted
pump. The pump will run for this delay time after
the call for heat has ended. Default is 2 minutes.
Range is from 0.1 minutes to 10 minutes.
Uni - Units
This allows the user to choose between °F
(default) and °C.
6.3.3 Programming Parameters – Water
Heaters
When the control is first turned on, it flashes
“ZZZ” and then “018” to indicate that the boiler
software is in the control. When the down arrow is
pressed, the boiler menu is brought up.
rT – Heater Return Temperature
This is a display only. This is the temperature
at the heater’s inlet sensor. This is not system
return temperature, as the water has been mixed
with hot outlet water, for heater protection.
bSP – Heater Setpoint
This is the setpoint for rT (the heater inlet
temperature sensor). Default is 140°F. Range is
from 140°F to 190°F.
LSP – System Setpoint
This is the setpoint for system, read at the system
sensor that is placed in the system loop. Default
is 140°F. Range is from 60°F to 190°F.
LdF – System Setpoint Differential
This is the differential for LSP. Default is 2.0°F.
Range is 1°F to 30°F.
Pd – Pump Delay
This is the time delay for the heater’s mounted
pump. The pump will run for this delay time after
the call for heat has ended. Default is 2 minutes.
Range is from 0.1 minutes to 10 minutes.
SP – Minimum Mixed Temperature
This setting is fixed at 125°F, and cannot be
change by the user.
bdf – Heater Setpoint Differential
This is the differential for bSP. Default is 10°F.
Range is 1°F to 30°F.
Uni - Units
This allows the user to choose between °F
(default) and °C.
CAUTION
Should overheating occur or the gas supply fail to
shut off, turn off the manual gas control valve to the
appliance.
6.4 Limit Controls
Pennant appliances are fitted with an automatic
reset high limit and a manual reset high limit, both
sensing the outlet temperature of the Pennant.
Water heater high limits are adjustable up to
200°F (93°C) and boiler high limits are adjustable up
to 240°F (116°C).
To set the limit controls, remove the control
panel cover and pull the control panel out to gain
access.
6.5 Operating the Burner and Set Up
6.5.1 Set Up for 0 to 2500 Feet Altitude
The Pennant appliance utilizes a modular design
to achieve its stage-firing. The setup must be checked
before the unit is put in operation. Problems such as
failure to start, rough ignition, strong exhaust odors,
etc. can be due to improper setup. Damage to the
Pennant resulting from improper setup is not covered
by the limited warranty.
1. Using this manual, make sure the installation
is complete and fully in compliance with the
instructions.
2. Determine that the appliance and system are
filled with water and all air has been bled from
both. Open all valves.
3. Observe all warnings on the Operating
Instructions label and turn on gas and electrical
power to appliance.
4. Switch on the appliance power switch located on
the right side of the unit.
5. The Pennant will enter the start sequence, as long
as the unit is being called for heat. The blower
and pump come on for pre-purge, then the ignitor
warm-up sequence starts and after the ignitor
warm-up is complete and all safety devices are
verified, the gas valves open. If ignition doesn’t
occur, check that there is proper gas supply.
Wait 5 minutes and start the unit again. During
initial start up, air in the gas line may cause the
Pennant to “lock out” during the first few trials
for ignition. Depending on the ignition modules
installed, the manual reset button on the ignition
modules may need to be depressed to restart the
Pennant.
6. When the unit is running, the supply gas pressure
must be checked. Inlet gas pressure must not
exceed 13” W.C. (3.2kPa). The minimum inlet
gas pressure is 5” W.C. (1.2kPa).
7. Once the inlet gas pressure is verified, the
outlet gas pressure from each valve (manifold
gas pressure) must be checked, and adjusted, if
Summary of Contents for Pennant PNCH
Page 23: ...Low Temperature Pennant Page 23 Figure 12 Ladder Diagram Sizes 500 1000 ...
Page 24: ...LAARS Heating Systems Page 24 Figure 13 Ladder Diagram Sizes 1250 2000 ...
Page 25: ...Low Temperature Pennant Page 25 Figure 14 Wiring Diagram Sizes 500 1000 ...
Page 26: ...LAARS Heating Systems Page 26 Figure 15 Wiring Diagram Sizes 1250 1500 ...
Page 27: ...Low Temperature Pennant Page 27 Figure 16 Wiring Diagram Sizes 1750 2000 ...
