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Updated: 07/10/12
Adjustment of the Model 600 CSS Fire Door
The fire door hinges of the Model 600 CSS are stronger, more permanent, hinges than the residential models.
unlike the residential models, the hinges are not utilized for adjustment.
There are two major parts that make up the fire door of the Model 600 CSS, the door water jacket and the
door-mounting frame. The water jacket is mounted to the door frame with three one inch threaded studs and
held in place with two jamb nuts and two washers on each stud. When making adjustments, it is important
not to loosen more than two studs at a time. The holes in the doorframe are larger than the studs to allow
for movement required to align the door with the doorframe. Please follow the recommended instructions for
proper adjustment of the fire door or contact your local dealer for further details.
If there is smoke leakage around the fire door at any point, and the gasket has been found to not be the
problem, the door should be adjusted. Prolonged exposure to smoke and heat can cause permanent damage
to the fire door gasket, magnify leakage problems, and create safety concerns. If the door seems to be aligned
properly with the fire door frame, adjusting the fire door towards the fire door frame will likely solve the leakage
problem. using a socket, loosen the outer and inner nuts located on the horizontal door support arm. This will
move the door towards the firebox creating a tighter seal between the door seal gasket and doorframe. Once
the door has been adjusted to the correct depth, the inner and outer nuts should, once again, be tightened
against each other to hold the door in that position.
Alignment of the Fire Door
1) The fire door should be positioned over the fire door frame so that there is an equal distance
between the fire door and the fire door frame on all four sides. Generally, this can be achieved by
returning the three adjustment studs to the center of their respective holes. The model
600 CSS fire door is heavy; safe adjustment can be done with the assistance of a
hydraulic or manual jack and a small pry bar. Loosen the doorframe jamb nuts just enough to
allow the door to move. Center the door vertically in the frame. move the door horizontally right
to left with the use of a small prybar between the door mounting frame and a jamb nut. When
the water jacket is centered on the doorframe, the jamb nuts should all be tightened.
2) The next procedure is to seat the door water jacket evenly around the fire door frame. It is best to
start with the water jacket away from the fire door frame approximately a 1/4”.
3) If the right side of the door is not seated against the fire door, loosen the top right adjustment, first
the outer jamb nut, then the inner jamb nut may be turned until the water jacket is seated about
1/8” into the silicone seal.
4) Follow the same procedure on the bottom adjustment until the right edge is seated evenly. now
tighten the bottom adjustment.
5) To ensure the left side of the door is sealed, follow the same procedure as the right side with left side
adjustment only.
