oil fired steam with indirect

BRIAN_3

i have a customer with a oil fired steam boiler we will be replacing right now domestic hot h2o is provited by an 80 gallon elect i would like to remove the elect and replace it with 50 gallon indirect. my problem is controls ? we want to avoid a tankless coil since cost has alway had 80 gal storage plus mineral content will plug coil in short time . does any one have advice on a wireing senero pipeing i an all set with . would like to avoid summer switch if possible

Unknown

Are you planning on maintaining some temperature

in the boiler ? If youre going to cold start it , I would use a relay with terminals 5 and 6 in it . Run 2 wires from T and T of the relay to the aquastat of the indirect .

What is controlling the steam part - a cad cell relay or a mounted relay ? With either one you want to run a wire from 1 T terminal of the steam relay to terminal 5 of the indirect relay . Then run a wire from number 6 of the indirect relay to an aquastat in the boiler . Then run a wire from the aquastat to the other T terminal of the relay of the steam part - comnpleting the circuit . Man that sounds confusing - maybe someone has a diagram online ?

Al_3

domestic hot h2o

How about using a tankless coil with a bronze circ, using the existng 80 gal electric as a storage tank and electric backup? Just a thought.-----AL

BRIAN_3

cold start

i would like to bee cold start . reusing the existing elect is out it is aprox 20+ yrs old sounded good though

Al_3

domestic hot h2o

Well than just wire in the aquastat off of the indirects tstat with a honeywell r822d #? simple dpdt relay to operate the pump. Although if it were my install, i might be a little reserved with cold startin the boiler due to domestic response time, but i don't know the circumstances-----------AL

Unknown

The wiring is as follows.

> i have a customer with a oil fired steam boiler

> we will be replacing right now domestic hot h2o

> is provited by an 80 gallon elect i would like to

> remove the elect and replace it with 50 gallon

> indirect. my problem is controls ? we want to

> avoid a tankless coil since cost has alway had 80

> gal storage plus mineral content will plug coil

> in short time .

> does any one have advice on a wireing senero

> pipeing i an all set with . would like to avoid

> summer switch if possible

Unknown

The wiring is as follows.

> i have a customer with a oil fired steam boiler

> we will be replacing right now domestic hot h2o

> is provited by an 80 gallon elect i would like to

> remove the elect and replace it with 50 gallon

> indirect. my problem is controls ? we want to

> avoid a tankless coil since cost has alway had 80

> gal storage plus mineral content will plug coil

> in short time .

> does any one have advice on a wireing senero

> pipeing i an all set with . would like to avoid

> summer switch if possible



The thermostat control of the indirect heater should be wired to the T-T terminals of a DPST relay such as a Honeywell R845A. The pump for the indirect gets powered from terminals 2 and 4 of this relay and terminals 5 and 6 (dry contacts) will connect to wherever your house thermostat is wired to on the steam boiler. However, one leg of this wire will have to be wired through a high limit immersion aquastat such as a Honeywell L4006A. This control must be immersed in the boiler near where you are supplying the boiler water to the indirect heater. Set this control for approximately 170F to 180F and the burner will shut off before you make steam when the indirect is calling. Hope this helps.

Glenn Stanton

Burnham Corp.

Unknown

The wiring is as follows.

The thermostat control of the indirect heater should be wired to the T-T terminals of a DPST relay such as a Honeywell R845A. The pump for the indirect gets powered from terminals 2 and 4 of this relay and terminals 5 and 6 (dry contacts) will connect to wherever your house thermostat is wired to on the steam boiler. However, one leg of this wire will have to be wired through a high limit immersion aquastat such as a Honeywell L4006A. This control must be immersed in the boiler near where you are supplying the boiler water to the indirect heater. Set this control for approximately 170F to 180F and the burner will shut off before you make steam when the indirect is calling. Hope this helps.

Glenn Stanton

Burnham Corp.