series 80 and series 90

bob_50

series 10 is three wire,low voltage,two position. Two sets of contacts make in sequence to start; break in reverse sequence to stop. These controls were used before the advent of the mercury switch and snap acting contacts to prevent contolled devices from chattering. series 20 is three wire, low voltage two position. Makes one circuit to start, breaks it and makes a second circuit to stop. Series 40 is two wire, line voltage, two position. Makes circuit when switch is closed, breaks circuit when switch is open. Series 60 is three wire line or low voltage, single speed floating. Controlers are basically a SPDT switch. Series 70 is electronic. Series 80 is two wire , low voltage, two position. Series 90 is three wire, low voltage, proportional. Instead of a switch in the controller it has a potentiometer usually 135 ohm. bob

gerry gill

whats the difference between

series 80 controls and series 90 controls?

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Empire_2

What type of control?

Should be clear inside manuals.

gerry gill

like in gas valves snd t-stats..

what makes something a series 80 or a series 90? i ran into a series 10 the other day..it said right on its lable (use only series 10 controls with this gas valve)..

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will smith_4

gerry-

Series 90 controls are proportional, series 60 are direct acting (on or off)

carol_3

Series 80 is 24 volt on-off, (single throw switching). Series 90 is modulating.

db_2

Modutrol Actuator....

Gerry,

That would be a Series 10 Modutrol actuator, see these
paired up will Series 90 ( 135 ohm slidewire ) pressure
controls, have to reread Series 80 though for exact diff.

Course when I see them I'm there to do a full retro, don't
get to monkey with them too much anymore.

Let me poke around some, I'll get an answer or at least
some links.

Cheers, db