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SET-UP
Thermostat Connections
The thermostat connections use
screw terminals. Also, the thermostat
connections are kept within the
furnace control box.
FIGURE 82
THERMOSTAT SCREW
CONNECTION
Motor Wiring Connections
The motor wiring connections are
basically the same as with current
control boards. However, there are
no "FAN" or "HEAT/COOL"
terminals. Connect the heating motor
speed wire to the "HEAT' terminal,
connect the cooling motor speed
wire to the "COOL" terminal. Connect
the unused motor speed wire to the
"M1" terminal
FIGURE 83
MOTOR WIRE CONNECTIONS
TROUBLESHOOTING
Indicator Lights
There are two indicator lights on the
UTEC 1012-925 control. The
"OK"
light indicates if the board is
operational, and the "FLAME" light
indicates the flame sensor microamp
flame proving capability.
The "OK" light has troubleshooting
features. If a specific problem takes
the furnace off line, the light flashes
a certain number of times to indicate
the problem.
The following lists the sequence of
"OK" light flashes and the associated
problem.
FIGURE 84
INDICATOR LIGHTS
1. One blink followed by a 2 sec.
pause - soft (one hour) lock out.
2. Two blinks followed by a 2 sec.
pause - pressure switch does not
close.
3. Three blinks followed by a 2 sec.
pause - open limit switch.
4. Four blinks followed by a 2 sec.
pause - pressure switch does not
re-open.
BLOWER OFF TIMING
The blower off timing is set using two
DIP switches. The control comes set
to time the blower off 120 seconds
after the heat call ends. This timing
can be changed in the field by setting
the switches as with other controls.
FIGURE 85
UTEC 1012-925
BLOWER OFF TIMINGS
(TIMER IS
RED BLOCK
ON BOARD)
OFFTIME SWITCH1 SWITCH2
90 SEC.
OFF
ON
120 SEC. OFF OFF
160 SEC. ON
OFF
180 SEC. ON
ON
TWINNING
Twinning requires the RXGP-F03
twinning kit. This kit consists of extra
blower door switches and wiring.
79
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