PG 5
4 Gas-Electric Selection
Rear View of control unit
REFER to the back of the Control Unit: ï If you have Electric Heat or a Heat Pump (without auxiliary heat) you must place the Gas/Electric jumper in the ELECT position (thermostat controls the Fan).
ï If you have Gas Heat the Gas/Electric Jumper should be in the GAS position (furnace controls the Fan ).
5 Install Batteries
The 8035C requires batteries to operate
your furnace and retain its programming in memory. Switch MODE switch to OFF and the FAN switch to AUTO.
ïInsert 2 AA alkaline batteries according to the polarity noted in the compartment.
ïPress the RESET button to clear transient program memory. Initially, all LCD segments will go off.
NOTE: Replace the batteries when this LOW battery indicator appears on the display or once a year. When replacing batteries, you have approximately 1/2 minute before your custom program is lost. 
GAS ELECT
Gas/ Electric jumper
AA
AA 
6 Power Options | Please be aware of the following power options. |
| |
1) The 8035C can run on batteries only. (2AA Alkaline) | |
The batteries will last well over 1 year. If the batteries are not replaced the thermostat will stop working.
2) The 8035C can run on the C wire if available.24VAC ONLY
As shown in the wiring diagrams, The C wire is the other side of the 24VAC heating transformer. If the C wire is used, the batteries are then for AC power loss only and will last much longer. The thermostat will continue working if the
batteries die. | PG 6 |
