TriangleTube Prestige Excellence Part 1 - Manual (Page 96)

Water Heater Start-Up
15
DHW Storage Temperature Setting
The parameter setting for the DHW storage tem-
perature is Parameter 1 and is accessible without
having to enter the service code.
To revise the parameter setting within the Prestige
Control Module for the set point of the Domestic
Storage temperature, the installer can access the
parameter setting by entering the Parameter Mode
PARA during normal operation, the service code is
not required.
1. Press MODE once until the display shows
PARA .
2. Press STEP until the display shows 1140 or
1XXX (where XXX is a setting other than the
factory setting).
3. Press the + or - button until the desired DHW
storage temperature setting is achieved. Press
STORE to save the setting. The display will
flash when the revised setting is accepted.
Setpoint Value Addition for DHW
To achieve the boiler operating temperature during
a DHW request for heat, the MCBA Control uses
Parameter 1 and a second parameter, Parameter 21
Setpoint Value Addition for DHW. Parameter 1
plus Parameter 21 will establish the boiler operat-
ing temperature limit.
If Parameter 1 is set below 134ºF, it is recom-
mended that Parameter 21 be reset to a higher set-
ting. The request for DHW is based on the tem-
perature reading of the DHW sensor and its rela-
tionship to Parameter 1. The operating boiler tem-
perature setpoint is based on Parameter 1 plus
Parameter 21 with a maximum operating tempera-
ture of 194ºF.
To revise the parameter setting within the Prestige
Control Module for the Setpoint Value Addition for
DHW, the installer must activate the service code
for the control module as previously described in
the Program Access of the MCBA section.
1. Enter into the service code mode.
2. Once the service code has been entered and
accepted, press MODE until the display shows
PARA .
3. Press STEP until the display shows P_21 .
This parameter setting is the Setpoint Value
Addition for DHW parameter. After releasing
the STEP button the display will show the cur-
rent setting.
4. Press the + or - button until the desired setting
is achieved. Press STORE to save the setting.
The display will flash when the revised setting
is accepted.
5. Once the desired parameter setting has been
revised and stored within the Prestige Control
module, press RESET to exit the CODE mode.
DHW ON Differential
The MCBA Control Module has 2 differential set-
tings for the burner operation. The first differential
setting the installer has the option of adjusting, is
Parameter 38 DHW ON Differential. This parame-
ter sets the DHW storage temperature low limit. The
burner operation will respond when the DHW stor-
age temperature drops below Parameter 1 minus
Parameter 38 setting.
A minimum DHW ON Differential parameter setting
will create a quicker burner operation response to
any domestic water draws from the Excellence tank.
In contrast, a maximum DHW ON Differential set-
ting will result in a delay response to domestic
draws.