41
4.9. Blocked Vent Switch
This heater is equipped with a blocked vent pressure
switch to prevent the operation of the heater when too
much of the vent is blocked. This switch is located on
the right side of the heater near the right rear corner and
activates at approximately 2" WC positive vent pressure.
Figure 52. Blocked Vent Switch
4.10. User Interface
The Touchscreen (TS) user interface uses a high
definition 7" (178 mm) capacitive screen. It includes an
extensive graphical library used to represent different
pipe configurations, error location, and operation of the
unit. The TS has the same basic menu distribution as the
original VERSA LCD Display, when pressing the MENU
button the menu bar becomes visible at the bottom of
the screen allowing navigation through four addition sub
menus (VIEW, ADJUST, Heater, and TOOLS).
For detailed descriptions of the various screens, page
flows and basic instructions, consult the Touchscreen
quick start user guide (5000.74) and VERSA IC control
manual (5000.72).
4.10.1. Adjusting the XTherm Setpoint
Use the MENU button to open the menu options, select
the ADJUST menu, go to System Settings page. Once in
the system settings screen use the Setpoint item. Adjust
the setpoint using the UP and DOWN arrow.
After making the setpoint selection press SET button
to apply the changes (a confirmation bar will turn green
showing that value has been applied). Minimum setpoint
is 50°F (10°C); maximum is 220°F (104°C) for H models,
150°F (66°C) for WH models and 104°F (40°C) for P models.
The default setpoint is 180°F (82°C) for H models, 125°F
(52°C) for WH models and 80°F (27°C) for P models.
4.10.2. View Menu
The VIEW menu is the default menu. See
Table S
. It
displays sensor temperatures, the modulation rate of
the blower, heater cascade status, pump operation and
CFH information. Some of the items displayed are mode
specific and are only observable when its corresponding
mode is active.
Figure 53. Use Interface
4.10.3. Menu - Initial Adjustment
To change settings use the MENU key to scroll to the
SETUP/ADJUST menu. The ADJUST menu allows the
installer to make adjustments to items shown in Table T.
Refer to the VERSA IC control manual (5000.72) for
detailed setup instructions.
Item
Application
Description
OUTDOOR
H MODE 1, 2, 3
Outdoor air temperature, available when TARGET = RSET in ADJUST menu
Target
H MODE 1, 2, 3
Current target temperature, available when Target = SETP in the ADJUST menu
(default), and (EMS / MODB)
SUPPLY
H MODE 1, 2, 3
Current system supply temperature
IND SUPPLY
H MODE 3
Current temperature being supplied to the indirect system
Boil OUTLET
All
Current heater outlet temperature
Boil INLET
All
Current heater inlet temperature
Boil ΔT
All
Current temperature difference between heater outlet and heater inlet
DHW SUPPLY
H MODE 2, 3
Current indirect DHW supply temperature
TANK DHW
WH
Current tank temperature
POOL
P
Current pool temperature
BOILER STATUS
All
IDLE, PREP, IGN, MOD RATE %, POST, SOFT, SOFT
Table S. View Menu
