HeatStation™ CONDENSING WATER BOILER
48
34-1161 05/17
after about 15 minutes. A gas pressure increase of 0.5” W.C. or more indicates one of the gas solenoid valves is
leaking by. Isolate and replace the leaking gas valve. After any leaking valve is replaced, the reassembled gas
train must be leak tested again before start-up is attempted.
10. The burner uses a hot surface igniter (HSI) as the ignition source. To verify flame signal, See Section 11.6 Flame
Current Measurements.
14.6 Startup Procedure
1. Begin by turning the Heatstation power switch to the OFF position. Remove plug from extra fitting in the flue vent
connector for combustion analysis sampling.
2. Simulate a Safety Shutoff Ignition Fail Test of the EOS control system:
With the manual gas valve at the burner closed, turn on the electrical service to the boiler, and then turn the
Heatstation power switch to the ON position.
The EOS Temperature control touch screen will energize. If the system water temperature is below the Target
temperature the Call-For-Heat sequence will initiate.
With no gas pressure, the ignition control will attempt to ignite the burner only one time before proceeding to
a safety shutoff. The display screen immediately shows a
LOCKOUT
condition has occurred.
In a few seconds an
ERROR
code flashes in the Status field, and a
FLAME FAIL
alarm message is displayed
followed by the troubleshooting message
“IGNITION TRIAL FAIL”
which scrolls across the top of the screen.
IMPORTANT:
Before restarting the unit, ensure that the hydronic pumps are on and circulating water through the
secondary loop in a Primary/Secondary system or the Primary system pump in a Primary Only system. The flow
switch on the boiler inlet will not allow the Heatstation to operate with inadequate flow. The EOS will energize the
primary pump during a Call-For-Heat. If the boiler flow switch does not sence adequate flow, the EOS will display
a
Remote Equipment Proving
failure message.
3. Now open the manual shutoff gas valve at the burner. Then push and release the
MAIN RESET
button on the
front panel of the boiler to recover from the lockout condition. If all control interlocks and safeties are satisfied the
control will automatically reset and attempt to start a new heating cycle.
When the call for heat sequence begins, the burner blower is energized. The status field of the display screen
shows that the EOS is waiting for the blower to turn on and reach the RPM wich proves operation.
When the blower is verified, the
Ignition Pre-Purge
sequence and
Hot Surface Igniter Heat up Period
begins. The
BLOWER
message is displayed during this pre-purge period.
Following a pre-purge and Hot Surface Igniter Heat Up countdown of about 36 seconds, a 4-second trial for
Ignition period is initiated. During this sequence the screen displays
IGNITION
while the gas valves are being
energized.
When ignition occurs and flame is proven, the Status field shows the
BURNER
is firing and the flame
CURRENT
is displayed in microamps for about 8 seconds.
As the burner fires, the modulating firing rate percentage displayed at the bottom of the screen will increase
and then decrease as the unit reaches its Target temperature.
The
CONTROL TEMPERATURE
will continue to display throughout the burner run cycle and after shutdown
when the unit returns to a satisfied and idle state.
4. Burner Combustion Adjustment
WARNING: If at any point carbon monoxide is in excess of 200 ppm, contact Riverside Hydronics
Customer Care for assistance.
WARNING: Do not continue to operate the appliance with carbon monoxide levels above 200 ppm. Carbon
monoxide is a colorless, odorless and poisonous gas that commonly results from gas combustion. High
concentrations of Carbon Monoxide are extremely dangerous to humans and animals. Operation of an
appliance at carbon monoxide levels above 200ppm can cause unsafe operation and the potential for
poisonous carbon monoxide to enter occupied areas. Such improper installation can cause property
damage, personal injury, exposure to hazardous materials or death.