Sandpiper, Control Unit, models:

G Series	Service & Operating Manual
HDF2	Service & Operating Manual, Original Instructions
HDF3-A	Service & Operating Manual
HDF4-A	Service & Operating Manual
SA1	Service & Operating Manual
Signature HDB2	Service & Operating Manual
Signature HDB3	Service & Operating Manual
Signature Series	Service & Operating Manual
s05	Service & Operating Manual