Owner's manual

Model 702G/O Advanced gas/oil burners — Instruction manual
Carlin part number MN702GO Rev. 06/23/14
– 17 –
Where appliance instructions differ from this manual, follow the appliance instructions.
120 VAC
Appliance
high fire
control
(remove jumper)
Figure 14 702G/O eld wiring connections (RM7897C only)
Low-High-Low step modulation
1. Totakeadvantageoftheenergy-savingpotentialoftheModel702G/O
combinationgas/oilburner,itshouldbewiredtooperateatlow-high-low
cycles.Theringcyclecanbemuchlongerusinglow-high-lowring,
becausetheburnercancycletolow reasdemanddecreases.This
keepstheburneronlonger,reducingcycliclosses.
2. Theappliancemustbeequippedwithahighrecontrol.Thiswouldbea
make-on-fallcontrol,eithertemperature(waterboiler)orpressure(steam
boiler)activated.Readtheappliancemanualforthelocationofthehigh
recontrol,whenused.
3. SeeFigure14toconnectthehighrecontroltotheburnerringrate
circuit.
4.
Theburnerincludesapre-wiredmanualhigh-reswitch.Closethisswitch
toholdtheburnerinhighremode.Opentheswitchtoholdtheburner
inlowremode.
5. Wire the burner — RM7897C primary control (continued)