AERCO Esteem O&M Manual - Manual (Page 59)

53
Boiler Control Display
E
RROR
(H
ARD
L
OCKOUT
) M
ODE
If a serious fault occurs, the system enters a
hard lockout condition which requires a manu-
al reset by pressing the RESET button. A hard
lock is indicated by displaying an E for the first
digit, followed by the error code.
For a detailed description of the error codes,
see Chapter 19 Troubleshooting
C
AUTION
The boiler freeze protection feature is
disabled during a Hard Lockout, how-
ever the space heating circulator will
operate.
C
AUTION
During a hard lockout or low water con-
dition the boiler will not re-start without
service. If the heating system is left
unattended in cold weather appropri-
ate safeguards or alarms should be in-
stalled to prevent property damage.
The boiler setpoint for a heating call can be
fixed or vary with the outdoor temperature.
If the application requires a constant supply
temperature from the boiler, the outdoor tem-
perature sensor should not be connected to
the boiler. If an outdoor temperature sensor
is connected to the boiler, the outdoor reset
function is automatically enabled and will vary
the space heating setpoint with the change in
outdoor temperature. The outdoor reset func-
tion has no affect on the DHW setpoint during
a domestic call.
GF-125