Robertshaw 8405-1 - Manual (Page 7)

7
Step 3: Testing the Thermostat
WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS
VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL
DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.
1. Put the HEAT-OFF switch into the HEAT position.
The will be displayed.
2. Press the button until the temperature setting is at least 3
degrees above room temperature. The heating system should turn
on. The fan may not turn on immediately, depending on the fan
delay built into the furnace.
3. Put the HEAT-OFF switch into the OFF position.
The heating system should turn off. The fan may
continue to run for a short period of time.
4. Put the AUTO ON switch into the ON position.
The blower fan should turn on.
The display will show a
.
5. Put the AUTO ON switch into the AUTO
position. The blower fan should turn off.
off heat
!
off heat
on auto
on auto
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