Wiring Diagrams - Slant/Fin Liberty II LD-20 Installation And Operating Instructions Manual
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Also See for Liberty II LD-20:
- Installation and operating instructions manual (44 pages) ,
- User manual (41 pages) ,
- Application manual (32 pages)
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10
ADJUSTING SETTINGS
To discourage unauthorized changing of Aquastat settings, a proce-
dure to enter the ADJUSTMENT mode is required. To enter the
ADJUSTMENT mode, press the UP, DOWN, and I buttons simulta-
neously for three seconds. Press the I button until the feature requir-
ing 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 disable (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, fol-
Aquastat
E
r r
r o
C
o
d
r E
1 r
r E
2 r
Err3
r E
4 r
r E
5 r
a
Err6
r E
7 r
b
Err 8
a
Err9
a
Err 10
a
Err 11
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 o 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.
BASIC WIRING DIAGRAMS
L8124C or A (with tankless heater)
L8148A (without tankless heater)
NOTES
1. Recomended high limit set-
ting is 200˚F. Low limit must be
set at least 20˚F below high
limit setting.
2. Pump zone terminals ZR, ZC
furnished on L8124 controls
only. See pump zoning diagram
below.
† Overload protection and disconnect switch must
be provided as required by local codes.
FOR L7224C OR L7248L
e
A
q
a u
t s
t a
e s
s n
r o
a f
u
t l
c ;
h
e
k c
w
t a
r e
e s
E
C
O
M
a f
u
t l
c ;
h
e
k c
E
v n
a r i
C
O
M
™
w
r i
n i
Excessive electrical noise or frequency out of range. Hardware fault; replace controller.
B
1
a f
u
t l
c ;
h
e
k c
B
1
w
r i
n i
g
v /
o
a t l
g
. e
L
o
w
L
n i
e
c ;
h
e
k c
L
1
L -
, 2
1 1
0
V
a
. c
W
a
n r
n i
g
F :
u
e s
c ;
h
e
k c
E
C
O
M
i w
e r
, s
e r
W
a
n r
n i
: g
E
E
P
R
O
, M
H
L
L ,
, L
H
f d
L ,
f d
r ;
Repeated B1 fault (voltage present at B1 when output is turned o ); check B1 wiring/voltage. 25
Warning: Outdoor Reset System failure; communication to Outdoor Reset Module lost,
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.
Warning: Boost Failure; Boost Mode active at least once per cycle for the last 60
consecutive cycles. Check Outdoor Reset curve settings.
DHW Module/Sensor failure; communication to DHW Module lost, DHW Module failure, or
temperature sensor failure. Check EnviraCOM wiring (1, 2, 3), check sensor wiring.
lowed by °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.
Boiler Temperature –
Low Limit Differential –
Local Thermostat Status –
Enviracom Thermostat Status –
Degrees Fahrenheit –
Degrees Celsius –
C
a
s u
e
A /
t c
o i
n
s n
. r o
. g
p
a l
e c
f
s u
. e
s e
t e
o t
d
e
a f
u
t l
a v
u l
e
. s
DESCRIPTION
High Limit –
Low Limit –
Error Code –
EnviraCOM
Alarm
1
8
1
8
18, 58
6
4
5
9
9
2
N
A /
50, 53, 149
150
146, 147,
148
LIBERTY
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