Kidde Fire Systems ECS Manual page 179

The stackable control head (P/N 82-486500-010) cannot be used with the 3-
inch valve cylinder (P/Ns 90-100600-100, 90-100601-100, 90-100900-001 and
90-100901-001), the 108 cubic inch Nitrogen Pilot Cylinder or any size of
Nitrogen Driver. The stackable control head does not have sufficient force to
activate these valves and may result in system failure. Use the electric/manual
CAUTION
control heads (P/Ns 8901XX) with the 3-inch valve (P/N 90-17000-000) or
with other high pressure Kidde valves.
The stackable control head must be used in conjunction with a manual pull
lever.
Figure 5. Order of Installation for Electric Control Head (Stackable Type), P/N 82-486500-010
July 2016 6 06-236115-003