DECREASE SPRING TENSION
If door is easy to open but hard to close-
INCREASE SPRING TENSION
If door is easy to close but hard to open-
DOOR SHOULD OPEN AND CLOSE WITH EQUAL EFFORT.
DO NOT LUBRICATE GUIDES.
NOTE
guides smoothly. If necessary, bend radius to adjust.
13. Make sure radius at top of guides leads curtain into
and secure.
guides. Adjust both guides for clearance if necessary
in Figure 6 is maintained along the full length of the
12. Check both guides to insure the clearance shown
guides for proper door operation.
certain the head of the bolt is on the inside of the
11. Install bottom bar stops as shown in Figure 7. Make
curtain to the floor.
10. Lower bottom bar into guide openings and lower
from unwinding and remove retaining bands.
9. Secure bottom bar or hand chain to prevent curtain
6
Figure 3
FULL TURN
NOTE DIRECTION
OF ARROWS ON
SADDLE CLAMPS
3/4 TURN
DIRECTION
CLOSE
1/4 TURN
1/2 TURN
EXAMPLE:
If the number of initial turns is 1 and ½, locate bottom
bar at the ½ turn position (Figure 3). Step 8 will explain
the winding procedure.
5. Position curtain assembly on headplates according to
dimension J-(Figure 1). Curtain must be centered on
door opening.
6. Install saddle clamps at both ends of door shaft as
shown in Figure 4 and securely tighten saddle clamps
to headplates.
7. Position guides to opening as shown in Figure 5.
Clearance between curtain and inside of guides is
shown in Figure 6. Adjust curtain or guides as
necessary to achieve this spacing. Secure guides to
jambs with supplied fasteners. See Table 2.
8. Curtain assembly counterbalance springs must now
be wound for the number of initial turns required to
set spring tension. As explained in Step 4, use the
initial turn setting to wind counterbalance springs.
EXAMPLE:
If initial turn setting is 1 and ½ use the following procedures:
a. Starting at the ½ turn position, rotate curtain assembly
on door shaft 1 and ½ turns in the “CLOSE” direction
(See Figure 3).
b. Bottom bar should stop at the FULL TURN position.
springs, then locate bottom bar accordingly.(NOTE:
Incorrect number of turns will affect door operation. See
directions on sheet 7 for adjusting spring tension.
for the initial turns required to wind counterbalance
clamping the door shaft. See Table 3, Page 9, for
shaft is required to neutralize the spring before
A reference point marked on the curtain ring and door
correctly when placing curtain assembly on headplates.
essential that the curtain bottom bar be positioned
be wound during the installment procedure. It is
4. Curtain assembly counterbalance springs will have to
Jamb
Steel
Concrete/
Masonry
Wood
*Use ANSI B95.12 carbide tipped drill bit and drill sizes for supplied fasteners.
For all others, refer to manufacturer’s supplied installation method.
1/4“ Screw
1/4“ Screw
1/4“ Masonry Screw
(3/16“ Drill Size,
2-1/4” Deep)*
Optional 1/4“ Expansion
Anchor (1/4“ Drill Size)
1/4“ Lag Screw
3/8“ Expansion Anchor
3/8“ Lag Screw
1/2“ Expansion Anchor
1/2“ Lag Screw
Doors
Width
780CD
780CD
780CD
Up to 20’
Up to 16’
Up to 16’
Up to 16’
Up to 16’
Up to 16’
Over
16’ to 20’
Over
16’ to 20’
Every hole
Every other hole
Every other hole
Every other hole
Every hole
Every hole
Every hole
Every hole
Table 2 - Guide Fasteners
790CW
790CW
790CW
Fastener
Spacing
9
9
8
8
6
6
1
1
4
4
6
6
7
7
See Page 9 For
Bill Of Materials
Figure 4
