Seton W-90E - BOILER LIMIT CONTROL SETTINGS; POWER FAILURES

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Power Failure Instructions

There is no way to operate this boiler without electricity. When the power goes off the pump

will stop and the draft will close shutting the fire down. Without power the boiler will boil over

and the pressure relieve valve will blow very hot water and steam out. This will not damage the

boiler as long as the draft remains closed. It is best if the relieve valves are plumbed outside the

wall in a place that will not damage life or property.

You will need to use a small generator or inverter with at least 1,000 watts capacity. A small in-

verter with a battery charger built in will work.

POWER FAILURES

BOILER LIMIT CONTROL SETTINGS

Aquastat Settings

Set draft aquastat at 160 to 180 degrees. It controls the water temperature by closing the

draft with an increase in water temperature and opens the draft when the water temperature

drops. The differential should be set at 15 degrees.

Set auxiliary aquastat at 190 to 200 degrees the differential should be set at 10 degrees.

The second aquastat is for over temperature protection, it will need to be wired to turn part

of your heating system to dump heat if your boiler is overheating.

Set the pump aquastat at 100 degrees, this turns the pump on as the water temperature

rises.

CHECK YOUR POLARITY!

The heating system and the control board should be on a dedicated circuit (20 Amp.)

To check polarity you test for voltage between the (hot) black wire and the (green) ground wire. If there is no

voltage present you have a reversed polarity problem.

This problem is usually at the wall receptacle; the black wire should be on the gold colored screw and the white

wire belongs on the silver colored screw.

NEUTRAL (WHITE)

HOT (BLACK)

GROUND (GREEN)

You should have no voltage reading

between the wide slot and the round hole.