Carrier 48TM028 - Manuals

2 TO SHUT UNIT OFF See Fig. 1 for location of gas valve. Refer to Fig. 3 while proceeding with the following steps. Step 1 — Set room thermostat to lowest temperature setting and set SYSTEM switch to OFF position. Step 2 — Close the external manual gas valve. Step 3 — Turn off the electrical power s...

3 STEP 1 STEP 2 STEP 3 STEP 4 STEP 5 STEP 6 STEP 7 STEP 8 STEP 9 STEP 10 Fig. 2 — To Light Unit

5 Heat Exchanger — To ensure dependable and efficient heating operation, the heat exchanger should be checked by aqualified maintenance person before each heating season, andcleaned when necessary. This checkout should not be attempt-ed by anyone not having the required expertise and equipmentto do ...