Hussmann Corporation • Bridgeton, Missouri 63044-2483 U.S.A.
Innovator Door Installation and Service Instruction
P/N 0425683_M
3
INNOVATOR DOOR MAINTENANCE
As part of an ongoing maintenance program for
Innovator Doors, Hussmann recommends that the
items below be checked annually.
a) Proper door closing torque
b) Gasket performance (check for tearing and proper
sealing)
c) Check the top hinge pin to ensure the pin is prop-
erly seated and not bent
d) Check the bottom hinge plate for excessive wear
(worn cam teeth)
e) Proper operation of hold open brackets
1. Check the doors for proper closing torque:
Test 1: Open door 90 degrees and close it manually.
Make sure the door opens and closes without binding
Test 2: Open door 90 degrees and release it. The door
should close on its own
Test 3: Open door more than 3” but less than 6” and
release it. The door should close on its own.
Torque adjustment, if needed, should be performed
“one click” at a time. A “zero” torque
door should not require more than 4 clicks.
If the torque cam and hinge socket are severely rusted,
both components should be replaced. A severely rusted
cam / socket assembly will not hold torque. Rust on
the cam socket assembly is usually caused by one of the
following:
• High humidity conditions > ASHRAE Type I
• Cycling of the frame heaters
Note 1: A rusted torque cam / socket assembly can
cause excessive wear on the torque rod’s spacer and
sleeve bearing. The result is a door that can “seat” far-
ther down the rod assembly to the point that it causes
binding at the hold open bracket. It can also cause the
top hinge pin’s sleeve bearing to deform. If the door is
seated too far down the torque rod assembly, it most
likely damaged the top hinge pin sleeve bearing. If the
pin is not bent, replacing the pin’s nylon sleeve bearing
will be sufficient. Although the torque rod assembly’s
sleeve bearing and spacer are replaceable, we recom-
mend that a severely rusted torque rod assembly be
replaced.
2) Inspect door gaskets:
• Check for tearing gaskets
• Make sure the gasket’s dart is properly seated into
the door’s gasket groove.
3) Inspect the top hinge assembly for exces-
sive movement at the top hinge socket.
• By design, the door will have a small, but discern-
ible amount of movement at the top hinge pin / hinge
plate socket joint. If excessive movement is detected,
the hinge pin assembly should be inspected to ensure
that the hinge pin is not bent (refer to note #1)
4) Inspect hold open bracket:
• Open the door to the “hold open” engagement
position. The “hold open” bracket should retain
the door.
• If the bracket fails to retain the door, replace the
bracket and the shoulder screw.
5) If a door passes the three “open / close”
tests, and there is no excessive movement at
the top hinge pin, then it is highly unlikely
that any components require replacement.
