Raypak XPAK 120 - Manual (Page 4)

4
• Outdoor temperature: This is the temperature
measured outside the house by the external sensor
(if installed) connected to the boiler.
• Outdoor reset curve: This is the relationship
between the external temperature and the tempera-
ture of the heating water. If the outdoor probe is
installed with the boiler, the temperature of the
heating water is automatically adjusted according
to the changes in outdoor temperature in order to
maintain a constant temperature in the home. The
outdoor reset curve is chosen by the installer
according to the geographical location and system
NOTE:
• The ambient temperature display ranges from
32°F to 210°F (0°C to 99°C).
• The outdoor temperature display ranges from
-38°F to 102°F (-39°C to 39°C).
• Temperatures outside these ranges are displayed
with three dashes “---”.
• Temperatures below 100° (°F or °C) will be dis-
played in tenths of a degree (XX.X).
• Temperatures of 100° or higher (°F) will be dis-
played in whole degrees (XXX°F)
USING THE CONTROL PANEL
ELECTRICAL CONNECTIONS
1 = OT Bus
2 = OT Bus
3 = Phone switch
4 = Phone switch
5 = Not used
Fig. 1: Electrical connections
Fig 2: Switches
SWITCHES
The remote control unit features two directly accessi-
ble ENCODER knobs. The left-hand knob (SELECT)
is used to select the operating mode. Turn to “RUN”
for normal operation. The right-hand knob (EDIT) is
used to modify the selected value.
NOTE: Refer to Figure 35 on page 36 of the XPak
Installation and Operating Instructions for connec-
tions from this Remote Control Panel to the XPak
boiler.