brit01,
Welcome to the forum. Based upon the manual, it appears you have three output options.
1. Switched relay output
2. SSR drive output
3. Solid state output
The solid state output appears to be an internal SSR, but can only handle 1 amp. That is inadequate. Similarly, the switched relay output is rated at 2 amps, which is also inadequate. Best approach would be to use an external SSR and use the SSR drive output option. Observe polarity when hooking it up.
Arcs_n_Sparks