How to connect BURNHAM 206-EN to Fan in Can?

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SEEKING_HELP

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Electrician stumped on how to wire the burnham 206-en (new, but old school boiler not modcon) to field control fan in the can for make-up air which is needed. Boiler does not have 24V separate take off and therefore looks like only way is to splice into the gas valve which could damage the valve. Anybody know how to do it right? Make up air must be on/off when boiler is on/off so don't want to wire make up air fan to the zone control.
 

Fitter30

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Boiler have its own pump does it cycle with the burner? Take a pic of your boiler wiring diagram and burner control brand and number. Fan in a can what voltage and if it's 24vac how many va.
 
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Fitter30

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Loop added wire through current switch from gas valve as many times as you can. This will multiply the amp signal to the current relay and not change the gas valve amps. Then use a added relay switched by the current relay to operate the fan since the current switch contact rating is so low. This is what the loop wire does work with ac or dc. Order normally open current relay
 
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Boiler have its own pump does it cycle with the burner? Take a pic of your boiler wiring diagram and burner control brand and number. Fan in a can what voltage and if it's 24vac how many va.
Boiler has it's own pump. Wiring diagram attached. Burnham model 206-E and Field Controls Fan In Can CAS-4. 2 electricians not sure how to wire properly.
 

Fitter30

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Use mv/ pv wire on gas valve which is common to pilot and main burner. With added wire looped through current switch many times then switch needs to be adjusted.
 
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