Crown Boiler PHNTM080 - Page 100

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C. Changing Settings
UsetheSettingsMenutochangetemperaturesetpointsandtotemporarilylocktheboilerinhighorlowre.On a new instal-
lationconguretheboilerrst,thengototheSettingsMenu.A map of the Settings Menu structure is shown in Figure 12.5. To
change settings:
1) From the Home Screen (shown in Figure 12.0) , press “MENU” to enter the Main Menu:
a) Press “SETTINGS”
b) When prompted for a password, use the “+1” key to raise the password to “005”. Press SUBMIT, then NEXT (if you
accidently scroll past 005, press EXIT to return to the main menu and start over).
c) Review the Warning and press ACCEPT to continue to the Settings Menu.
d) Note:IfyougofromtheCongurationsMenutotheSettingsMenuwithoutreturningtotheHomeScreen,youwillnot
have to reenter a password.
2) CH Settings - Press CH to change the target supply water temperature setting.
a) If outdoor reset is disabled, only one CH setpoint exists. The boiler will always attempt to maintain this temperature
during a call for CH. To change the setting, touch the button containing the current setting. Adjust the temperature using
the “+” and “-” arrows shown and press SET to save the change (also see “How to Change Settings” in Figure 12.5).
b) If outdoor reset is enabled, there are a total of four settings that can be changed (also see Figures12.5 and 12.6):
• Max Supply Setpoint - This is the maximum permissible supply setpoint temperature, regardless of how low the
outdoor temperature is.
• Min Supply Setpoint - This is the minimum permissible supply setpoint, regardless of how high the outdoor
temperature is.
• Max Outdoor Temp - At or above this setting, supply setpoint is equal to the “Min Supply Setpoint”
• Min Outdoor Temp - At or below this setting, supply setpoint is equal to the “Max Supply Setpoint”
Pressing the GRAPH button on either the CH Outdoor Reset -1 or CH Outdoor Reset -2 screen allows any of the above
four outdoor reset settings to be changed while viewing the other three. This graph is for reference only - it does not scale
with changes to the ODR settings.
c) If Warm Weather Shut-Down (WWSD) is enabled, a NEXT button will be present on the CH-Outdoor Reset - 2 screen.
This screen allows the user to set the WWSD Outdoor Temperature. This is the outdoor temperature above which the
boiler will ignore a call for heat from the thermostat.
Table 12.4: Summary of Target Temp and Pump Behavior
DHW
Option #
Description Status of:
Demands
None CH Only DHW Only
CH+DHW
(<60 min)
CH+DHW
(>60 min)
1
System Pump used for
CH only (Fig. 12.2).
DHW priority pumping.
Boiler Pump OFF ON ON ON ON
DHW Pump OFF OFF ON ON OFF
System Pump OFF ON OFF OFF ON
Target Temp NONE CH DHW DHW CH
2
System Pump used for
CH only (Fig. 12.2). No
DHW priority pumping.
Boiler Pump OFF ON ON ON ON
DHW Pump OFF OFF ON ON ON
System Pump OFF ON OFF ON ON
Target Temp NONE CH DHW DHW CH
3
System Pump used for
both CH and DHW (Fig.
12.3).
Boiler Pump OFF ON ON ON ON
DHW Pump OFF OFF ON ON OFF
System Pump OFF ON ON ON ON
Target Temp NONE CH DHW DHW CH