Printronix LP844C User Manual page 166

3
Connect the printer unit and the caster base or the additional tray unit and the
caster base.
The figure shows an example of the additional tray unit and the caster base connected.
4
When adding on a further additional tray unit, gently place the unit on top so
that the protrusions at the rear of the additional tray unit to be attached are
aligned with the back of the additional tray unit that is already connected to the
caster base.
5
Join the additional tray units together.
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8. Appendix