IDWH Sensor Parameters
15
The Frost Protection feature is designed to protect the
UNIT from a potential freeze up. The protection is acti-
vated once the IDWH Sensor records a domestic tem-
perature of 38
º
F. At that time the PRESTIGE boiler will
begin the burner function at low input and the DHW cir-
culator will begin circulating. The burner will continue
operating at minimum input with the DHW circulator
energized until the IDWH Sensor senses a domestic
water temperature of 50
º
F. At that point the boiler will
shut down the burner function and the DHW circulator.
This feature is always active even if the DHW operation
is in the OFF mode.
DOMESTIC PRIORITY
When the Mini SMART is connected to the PRESTIGE’s
MCBA control module domestic priority over space heat-
ing is automatically activate during any domestic draws.
Misc. Functions
There are several other Parameter settings available for
DHW applications, i.e. post pump features, blocking time
for burner operation. These features are explained more
in detail in the PRESTIGE Control Supplement.
TROUBLESHOOTING
Error Codes
If Parameter 46 setting is 12 (IDWH Sensor) the follow-
ing “soft” lockouts could occur:
b_38
alternating with a status code of 9
The IDWH Sensor is not properly connected to
the PRESTIGE low voltage terminal strip.
Check for proper connections and proper termi-
nals
b_33
alternating with a status code of 9
The IDWH Sensor is short-circuited. Check if
the DHW is being used and is properly con-
nected to the PRESTIGE low voltage terminals.
Ensure Parameter 46 is correctly set for 12 and
is stored properly.
Once the condition is corrected the errors will automati-
cally reset and the PRESTIGE will return to normal oper-
ation.
The “Detection OFF” setting of Parameter 39 greatly
affects the production of domestic hot water. A max-
imum setting of Parameter 39 could result in an
excessive domestic water temperature resulting in a
potential scald hazard. It is strongly recommended
that the installer utilize a anti-scald thermostatic
mixing valve on the hot water outlet of the water
heater. Failure to comply could result in severe per-
sonal injury, death or substantial property damage.
To revise the parameter setting within the PRESTIGE
Control Module for DHW “Detection OFF” control, the
installer must activate the access code for the control
module as previously described in the Program Access
of the MCBA section on page 10.
1. Enter into the access code mode.
2. Once the access code has been entered and
accepted, press MODE until the display shows
PARA
.
3. Press STEP until the display shows
P_39
. This
parameter setting is the “Detection OFF” parameter.
After releasing the STEP button the display will
show the current setting.
4. Press the + or - button until the desired DHW
“Detection OFF” setting is achieved. Press STORE
to save the setting. The display will flash when the
revised setting is accepted.
5. Once the desired parameter settings have been
revised and stored within the PRESTIGE Control
module, press RESET to exit the CODE mode.
ADDITIONAL DHW FEATURES
Frost Protection
With the addition of the IDWH Sensor, the PRESTIGE
Control module will now provide a Frost Protection feature
to the water heater. This feature becomes active when
Parameter 46 is set to 12 and cannot be overridden.
DANGER
