Hydro Air Wiring Diagrams

[stickboy1375]

I'm doing a residential job with two hydro air units, (Heat Coil & AC Coil) the AHU only came with a fan relay no heat relay. I've been wiring them this way for years, but was wondering what anyone else up north was doing. Any suggestions?

 

[lowryder88h]

Hydro

Hydro

Put a 24v time-delay relay in series from aquastat to "G" of fan relay