Hussmann microSC VRL1B Installation & Operation Manual page 31

P/N 3034040_H
ADJUSTING DOOR SAG
To adjust door sag (saw-tooth effect from door
to door), loosen the two hinge plate mounting
screws using a Torx Plus no. 27 bit. Adjust
hinge plate as needed, then tighten the screws.
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
properly 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:
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.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Loosen both
hinge plate
mounting
screws.
Adjusting Door Sag
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" farther 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 recommend that a severely
rusted torque rod assembly be replaced.
Hinge Plate
Mounting
Screw
VRL Merchandisers
31