My system consists of a 2 speed pump motor, polaris booster pump, pool/spa heater, blower. With my old single speed pump I had 2 intermatic mechanical timers that controlled everything. I have since replaced them with a single intermatic P1353me 3 circuit timer. I have it set to mode 4 to control the pump high, pump low and booster pump. The blower is wired directly to 220, I have not hooked up my heater yet and would like to have the heater available to come on when the pump is on high speed only. There is a on/off switch at the heater I would use to turn it on when needed. I used the old relay contactor for a junction block/bridge with a jumper wire contecting the lower terminals to the upper terminals and also used a piece of wiring to hold down the mechanical contacts as a redundant contact. All the items are 220v.
Would it be ok to just run one leg of the heater to line and the other to load on circuit 1? The old timer shut off both lines to the heater. I thought about switching my booster pump input line with the other 110 line and then hooking up the heater to circuit 1 load and circuit 3 load. That way I could turn on the polaris pump which turns on the high speed pump and both circuits would supply power to the heater.
I tried looking for some other type of bridge to use but my local Lowes was no help so I used what I had available at the moment, thats why I used the old contactor relay block.