HeatStation™ CONDENSING WATER BOILER
28
34-1161 05/17
10.1 Touch Screen User Interface
The touchscreen of the EOS provides one-touch access to view and adjust various Menu set points. The touchscreen
displays Status Fields, Items, Boiler Output and Number Fields. It also contains buttons for navigation & adjustment,
and the Home Button to access menu selections.
10.2 Status Field Display
The Status Field displays the current operating status of the control display. Most items in the status field are only
visible when in the View Menu or an alarm condition is present.
Item
Description
HAND
Hand Mode has been activated in the Manual Override Menu. This function allows the user to
manually control the operation and firing rate of the burner.
OFF
The Off mode indicates that the system has been disabled in the Manual Override Menu.
PURG
When BLOWER is displayed in the main screen, PURG will indicate Post-Purge. The Purge
mode also indicates that individual pumps have been activated in the Manual Override Menu.
IDLE
The EOS is Idle due to no demand for heat
ARSW
The EOS is attempting to purge but waiting for the air proving switch to prove blower air flow
PREP
The EOS is Pre-Purging the burner system
IGN
The Hot Surface Igniter is hot and the gas valve has opened to attempt burner ignition (4
seconds)
BURN
The Burner has ignited and the flame has been sensed.
WWSD
The boiler is currently in Warm Weather Shut Down mode. The boiler will still respond to calls
for heat for DHW or pool heating.
10.3 Operational Sequence Field Display
The EOS displays the following burner operational sequence, ignition status, timings, temperatures and values:
Item
Value
Displayed
Description
SATISFIED
⁰
F
No Call For Heat based on temperature sensed at controlling sensor, usually
in the supply piping. The controlling sensor the default display temperature.
STANDBY
h:mm
No Call For Heat based on inputs TH J1-9 (R1&R2) or DHW J1-8
CALL FOR
HEAT
Initiated when the temperature sensed at the control sensor in the supply
piping is 10 degrees less than the setpoint temperature.
BLOWER
mm:ss
(PREP) Displays the Pre-Purge time from start of blower Pre-Purge, through
heatup of igniter, and ends at start of trial for ignition.
BLOWER
mm:ss
(PURG) When the call for heat has ended, the post purge time countdown is
displayed.
IGNITION
mm:ss
Displays trial for ignition, while the gas valves are bing energized, until fram
signal is seen.
CURRENT
0 - 10 µA
Flame sense signal shown as Flame Current (µA)
CTRL TEMP
⁰
F
Flame is established and the temperature sensed at the controlling sensor,
usually in the supply piping is displayed.
