W8735ER WIRELESS OUTDOOR RESET MODULE
66-1202—01
6
Fig. 5. Outdoor temperature setback curve with boost.
As Outdoor Temp reaches the Warm Weather Shutdown set-
point (if enabled), the boiler is kept from cycling and will only
service DHW demands if the Aquastat Zr terminal is
configured for Domestic Hot Water request. See Table 4 on
page 6.
Table 3. Warm Weather Shutdown Settings and Defaults.
Parameter name
Minimum
value
Maximum
Value
Default
Warm Weather
Shutdown
40
F (or Off) 70
F
Off
HIGH LIMIT
BOILER
TEMPERATURE
M29557
MINIMUM BOILER
TEMPERATURE
MINIMUM
OUTDOOR
TEMPERATURE
MAXIMUM
OUTDOOR
TEMPERATURE
OUTDOOR
TEMPERATURE
BOOST
STEP
BOOST
Table 4. Programming Parameters.
Aquastat
HL_
High Limit.
Hdf
High Limit Differential.
LL**_
Low Limit.
Ldf
Low Limit Differential.
ELL***
ZR input configured as External Low Limit (ON/OFF)
duu
ZR input configured as external Domestic Hot Water
(DHW) request (ON/OFF)
ASC
Anti Short Cycle Timeout (seconds); “OFF” is
disabled.
otL
Outdoor Temperature Low (minimum) parameter for
the outdoor reset curve (
F or
C)*
otH
Outdoor Temperature High (maximum) parameter for
outdoor reset curve (
F or
C)*
btL
Boiler Temperature Low (minimum) parameter for
outdoor reset curve*
bP
Boost Period (minutes). “OFF” is displayed if Boost is
inactive*
bS
Boost step (
F or
C) shown only if Boost is active
(bP=ON)*
UUS
Warm Weather Shutdown Temperature (
F or
C)*
tPL**
Thermal Purging Limit Temperature (
F or
C),
“OFF” if disabled.
tPt**
Thermal Purging Time Delay (minutes), shown only
if tPL is enabled
PC
Pump Cycling (ON/OFF)
F-C
Temperature units (
F or
C)
*Settings available for adjustment on the 3-digit Aquastat
display only when the “Outdoor Reset Module” is installed.
**Not displayed when connected to an L7248 Aquastat
Control.
***Only displayed when connected to an L7248L Aquastat
Control.
IBC
HL_
High Limit.
Hdf
High Limit Differential.
Or_
Pump Overrun Time
otL
Outdoor Temperature Low (minimum) parameter for
the outdoor reset curve (
F or
C)
otH
Outdoor Temperature High (maximum) parameter for
outdoor reset curve (
F or
C)
btL
Boiler Temperature Low (minimum) parameter for
outdoor reset curve
tPL
Thermal purging minimal temperature (Parameter is
available only if outdoor temperature is invalid)
tPt
Maximal Thermal Purge time (Parameter is available
only if outdoor temperature is invalid)
rSt
Reset Lockout
F-C
Temperature units (
F or
C)