Table of Contents
Advertisement
LIBERTY II
ADJUSTING SETTINGS
To discourage unauthorized changing of Aquastat settings, a procedure
to enter the ADJUSTMENT mode is required. To enter the ADJUST-
MENT mode, press the UP, DOWN, and I buttons simultaneously for
three seconds. Press the I button until the feature requiring adjustment
is displayed:
. HL_ . High Limit.
. LL_ . Low Limit. (L7224 only)
. Ldf . Low Limit Differential. (L7224 only)
. °F . °C.
.ELL_ External Low Limit (L7248L only)
Then press the UP and/or DOWN buttons to move the set point to the
desired value, to change between ˚F and C˚, or to enable (On) or dis-
able (Off) the External Low Limit. After 60 seconds without any button
inputs, the control will automatically return to the RUN mode.
DISPLAY
In the RUN mode, the Aquastat will flash .bt. (boiler temp) followed by
the temperature (i.e., 220), followed by °F or °C.
To read boiler settings, press the I key to read the parameter of interest.
For example, press I High Limit
(HL) is displayed, followed by a three-digit number, i.e., 220, followed by
Aquastat
E
r r
r o
C
o
d
e
r E
1 r
A
q
a u
t s
t a
e s
s n
r o
a f
u
t l
r E
2 r
E
C
O
M
a f
u
t l
c ;
h
e
k c
E
Err3
Excessive electrical noise or frequency out of range. Hardware fault; replace controller.
r E
4 r
B
1
a f
u
t l
c ;
h
e
k c
B
1
w
r i
r E
5 r
L
o
w
L
n i
e
c ;
h
e
k c
L
1
L -
a
W
a
n r
n i
g
F :
u
e s
c ;
h
e
k c
Err6
r E
7 r
W
a
n r
n i
: g
E
E
P
R
O
, M
b
Repeated B1 fault (voltage present at B1 when output is turned off); check B1 wiring/voltage. 25
Err 8
a
Warning: Outdoor Reset System failure; communication to Outdoor Reset Module lost,
Err9
Outdoor Reset Module failure, multiple outdoor temperature sensors detected on the bus, or
outdoor temperature sensor failure. Check EnviraCOM wiring (1, 2, 3), check sensor wiring.
a
Warning: Boost Failure; Boost Mode active at least once per cycle for the last 60
Err 10
consecutive cycles. Check Outdoor Reset curve settings.
a
DHW Module/Sensor failure; communication to DHW Module lost, DHW Module failure, or
Err 11
temperature sensor failure. Check EnviraCOM wiring (1, 2, 3), check sensor wiring.
a
Warnings are generated to enunciate the system is not operating optimally, but the Aquastat is still operating and
maintaining boiler temperature. In the instance where an Outdoor Reset Module is used, the warnings may indicate a
reset curve setting error one or more features is not running optimally, and the Aquastat is reverting to default settings
or has stopped running the Outdoor Reset algorithms. The warnings are cleared when the issue(s) is resolved.
b
To clear Err 8 condition, depress and hold all three user keys simultaneously for 60 seconds. Err 8 condition clears
and display returns to normal. Err 8 condition is designed to catch welded relays on the Aquastat and will normally
only occur near end of life for the control. If Err 8 condition has occurred early in the controls life, be sure to check for
voltage feedback to B1 when B1 should be off and check current draw on b terminal to be sure oil burner is not draw-
ing excessive current. Err 8 condition will keep repeating if B1 fault is not cleared.
FOR L7224C OR L7248L
C
a
s u
e
A /
t c
o i
n
c ;
h
e
k c
w
t a
r e
e s
s n
. r o
v n
a r i
C
O
M
™
w
r i
n i
. g
n i
g
v /
o
a t l
g
. e
, 2
1 1
0
V
a
. c
E
C
O
M
i w
e r
, s
e r
p
a l
e c
f
s u
. e
H
L
L ,
, L
H
f d
L ,
f d
r ;
s e
t e
o t
d
e
a f
u
t l
a v
u l
°F or °C. Pressing the I button again (on L7224 models) will display the
Low Limit (LL) followed by a three-digit number and the corresponding
degree designator.
After approximately 60 seconds without any key presses, the display will
enter a dim display mode. To return to the bright display mode, simply
press any key.
Low Limit Differential –
Local Thermostat Status –
Enviracom Thermostat Status –
Degrees Fahrenheit –
EnviraCOM
1
1
18, 58
6
5
9
e
. s
N
50, 53, 149
150
146, 147,
148
DESCRIPTION
Boiler Temperature –
High Limit –
Low Limit –
Error Code –
Degrees Celsius –
IMPORTANT
Alarm
This boiler is equipped with a feature that saves
8
energy by reducing the boiler water temperature as the
8
heating load decreases. This feature is equipped with
an override which is provided primarily to permit the
4
use of an external energy management system that
9
serves the same function. THIS OVERRIDE MUST NOT
2
BE USED UNLESS AT LEAST ONE OF THE
A /
FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is
installed that reduces the boiler water
temperature as the heating load decreases.
• This boiler is not used for any space heating
• This boiler is part of a modular or multiple
boiler system having a total input of
300,000 BTU/hr or greater.
• This boiler is equipped with a tankless coil.
13
Advertisement
Table of Contents
