4
INSTALLATION INSTRUCTIONS - DIRECT SPARK
PILOT OUTLET
Install the pilot tubing plug packaged in the 720-079 gas valve.
WIRING
DO NOT
short gas valve terminals. This will damage wall thermostat
and void warranty.
1. Check the system for the proper transformer by comparing the VA
ratings of the transformer and the system. The system rating is deter
-
mined by
multiplying the voltage draw times the amp draw. Normally
20VA transformers are sufficient for heating only applica tions and
40VA for heating/cooling applications.
NOTE:
Improper transformer VA rating will cause erratic system
operation.
2. Locate the white wire terminal adaptor (jumper) that is included
with the 720-079 gas valve.
3. Connect the white wire terminal adaptor to the “M” and “P” termi
-
nals on the 720-079 gas valve.
4. Determine which wire was connected to the “main valve” terminal
on the original valve. Connect this wire to the remaining terminal on
the white wire terminal adaptor.
5. Connect the remaining wire from the original gas valve to the “C”
terminal on the 720-079 gas valve
TYPICAL ROBERTSHAW DIRECT SPARK APPLICATION
