Dorma EM 508 Series User manual

Installation Instructions for Surface Wall Mount Electromagnetic Door
Holders Catalog Series EM 508 24120
P/N 3101128 ISSUE 1 © 2006
501-1012DE-1-01
Description
The EM 508 Series are surface wall mount door holders for use
with single doors. All are ULand cULListed and FM approved.
Installation
Install and wire in accordance with applicable codes, standards,
suchas NFPApublications70 (National ElectricalCode), 72 (Na-
tionalFireAlarm Code), and80 (Standardfor Fire Doors and Fire
Windows), and/or other regulations applicable to the country
and locality of installation and in accordance with authorities
having jurisdiction.
Table 1. Specifications
Cat.No. Volts Amps
EM 508 24120 24V AC 60 Hz 0.015
24V DC 0.015
120V AC 60 Hz 0.015
1. Using Figure 1 and Table 2, locate the intersection of
DimensionX and DimensionY. DimensionZ is shownat the
intersection in the gray area.
NOTE: If dimension X or Y is not shown on the chart,
extrapolate Dimension Z. (i.e., if X=7, and Y=30, Z
= (27-5/8 - ((27-5/8 - 27-1/4)/2)) => Z = 27-9/16" )
2. Mount the surface housing (supplied) vertically on the
horizontal center line and 5" from the top of the door with
two 1/4-20 x 1" screws (provided).
NOTE: The outlet box must be able to withstand a maximum
holding force of 50 pounds.
If X and Y intersect in the blank area in Table 2, DO NOT
install the outlet box. The contact plate and electromagnet
cannot be aligned with these dimensions.
Door
Door jamb
Wall line
Outlet box
center
line
X
Z
Y
Figure 1. Locating the Door Holder
Table 2. Dimension chart (in inches (mm))
Electromagnet Assembly Mounting
1. Refer to Figure 4. If not using surface metal raceway (not
supplied), secure the acrylic insulating sleeve (provided) to
the hole in the surface housing with the #8-32 x 3/16" screw
provided.
WARNING
To prevent electrical shock, ensure power is discon-
nected.
2. Pull field wiring through conduit into the surface housing. If
surface metal raceway (not supplied) is being used, the
required size is 1/2" wide x 11/32" high. The raceway will
seat 1/4" into the surface housing. Wiring should be run
through the acrylic insulating sleeve where applicable.
3. Establish earth-ground continuity in accordance with
applicable codes, standards and authorities having
jurisdiction.
4. Refer to Figure 2 and connect as instructed below:
a. 120V AC operation. Connect power field wiring to
terminalsmarked "120VAC"and "COM."
b. 24VAC/DCoperation. Connect power field wiring to
terminalsmarked "24VAC/DC"and "COM."
5. Mount the connected assembly onto the surface housing
and secure it with (2) #10-32 x 7/8" screws (supplied).
NOTE: The combined projection of the surface housing,
electromagnet assembly, and the armature assembly
is 4 1/16".
DORMA Architectural Hardware * Dorma Drive - Drawer AC, Reamstown, PA 17567
28 30 32 34 36 38 40 42 44 46 48
226 (660) 28 (711) 29 7/8 (759) 32 (813) 34 (864) 36 (914) 38 (965) 40 (1016) 42 (1067) 43 7/8 (1114) 45 5/8 (1159)
426 (660) 28 (711) 29 7/8 (759) 32 (813) 34 (864) 36 (914) 38 (965) 40 (1016) 42 (1067) 43 7/8 (1114) 45 5/8 (1159)
625 5/8 (651) 27 5/8 (702) 29 5/8 (752) 31 3/4 (806) 33 3/4 (857) 35 3/4 (908) 37 3/4 (959) 39 3/4 (1010) 41 3/4 (1060) 43 5/8 (1108) 45 3/8 (1153)
825 1/4 (641) 27 1/4 (692) 29 1/4 (743) 31 3/8 (797) 33 1/2 (851) 35 1/2 (902) 37 3/8 (949) 39 1/2 (1003) 41 1/2 (1054) 43 3/8 (1102) 45 1/4 (1149)
10 24 5/8 (625) 26 3/4 (679) 28 3/4 (730) 30 7/8 (784) 33 (838) 35 (889) 37 (940) 39 1/8 (994) 41 1/8 (1045) 43 (1092) 44 7/8 (1140)
12 23 3/4 (603) 25 7/8 (657) 28 (711) 30 1/8 (765) 32 1/4 (819) 34 3/8 (873) 36 3/8 (924) 38 1/2 (978) 40 5/8 (1032) 42 1/2 (1080) 44 3/8 (1127)
14 23 3/4 (603) 25 (635) 27 1/4 (692) 29 3/8 (746) 31 1/2 (800) 33 3/4 (857) 35 7/8 (911) 38 (965) 40 (1016) 42 (1067) 43 7/8 (1114)
16 21 3/4 (552) 24 (610) 26 1/4 (667) 28 1/2 (724) 30 3/4 (781) 33 (838) 35 1/8 (892) 37 1/4 (946) 39 3/8 (1000) 41 3/8 (1051) 43 3/8 (1102)
18 20 (508) 22 1/2 (572) 25 (635) 27 3/8 (695) 29 3/4 (756) 32 (813) 34 1/4 (870) 36 1/2 (927) 38 5/8 (981) 40 5/8 (1032) 42 1/2 (1080)
20 18 1/4 (463) 21 (533) 23 1/2 (597) 26 (660) 28 1/2 (724) 30 7/8 (784) 33 1/8 (841) 35 3/8 (899) 37 5/8 (956) 39 5/8 (1006) 41 5/8 (1057)
22 18 3/4 (476) 21 5/8 (549) 24 3/8 (619) 27 (686) 29 3/8 (746) 31 3/4 (806) 34 1/8 (867) 36 1/2 (927) 38 5/8 (981) 40 3/4 (1035)
24 22 1/2 (572) 25 1/2 (648) 28 1/8 (714) 30 5/8 (778) 33 1/8 (841) 35 5/8 (905) 37 7/8 (962) 40 (1016)
26 Do not install outlet box if 26 1/4 (667) 29 (737) 31 5/8 (803) 34 1/4 (870) 36 1/2 (927) 38 5/8 (981)
28 Dimensions X and Y intersect in this blank area. 29 3/4 (756) 32 1/2 (826) 34 7/8 (886) 37 1/8 (943)
30 The armature and electromagnet cannot be aligned. 27 3/4 (705) 30 5/8 (778) 33 (838) 35 3/8 (899)
32 31 3/8 (797) 33 7/8 (860)
X = Dimension of door jamb to wall
Y = Dimension of door width

Concealed
mounting
plate
1/2"
Two #10 x 1 1/2"
screws (supplied)
Set screw.
Tighten with 6/32" Allen wrench
to secure armature onto
mounting plate.
Door
Contact plate
Contact plate
adjusting screw
1/2"
Armature Assembly Mounting
NOTE: Armature assembly must be mounted vertically
(Figure 3) to obtain correct alignment with the
electromagnet.
1. Using a 5/32"Allen wrench, turn the contact plate adjusting
screw (Figures 5 and 6) counterclockwise to loosen the
contact plate.
2. Place the transfer marking points in the armature mounting
holes (Figure 3).
3. To locate thetwo mounting holesin the door,hold the contact
plate centered against the magnet, open the door and press
against the transfer marking points on the armature base.
Release the door and remove the transfer marking Points.
4. Mount the armature assembly using one of the following
methods:
a. Thru-boltmounting (Figure5). Center punch the two
holes (at the points marked in step 3) and drill 5/16"
diameter through the door. Distance between the center
points should equal 1 3/4".
NOTE: Thru-bolt mounting is recommended for standard
1 3/4" hollow metal, hollow core or composite type
wood doors.
Secure the armature assembly, with the contact plate
adjust screw facing down, to the door as shown in
Figure 5 using (2) #1/4-20 x 2" screws (supplied)
NOTE: For 2" doors, use (2) 1/4-20 x 2-1/4" bolts.
b. Surfaceconcealedmounting(Figure6). Measuretwo
120V AC 24V AC/
DC
COM
FRONT
VIEW
TOP
VIEW
Figure2. Terminal Block
Figure 5. Thru-Bolt Mounting
Figure 6. Surface Concealed Mounting
points for 1/8" holes drilled 1/2" on center equidistant
from each marked point. Center punch the holes and
drill 1/8" diameter x 1 1/4" deep. Install the concealed
mounting plate using the two #10 x 1 1/2" screws
provided.
NOTE: Surface concealed mounting is not recommended for
hollow metal, hollow core, or composite type wood
doors.
Align the holes for the concealed mounting plate in the
armature base with the pins on the concealed mounting
plat. Secure the armature assembly, with the contact
plateadjust screw facingdown, to thedoor by tightening
the set screw as shown in Figure 6.
5. Align the contact plate against the electromagnet. The
contact plate mustbecentered and lie flat against the magnet
to ensure sufficient holding force. Tighten the contact plate
adjusting screw until the plate is firm but not set. Do not
overtightenthecontactplate.
6. Recheck alignment and adjust if necessary.
7. Adjust the door closer to exert 3 pounds of force when the
door is open and armature and magnet are in contact.
8. Check operation.
NOTE: The unit will not operate without electrical power.
Figure 3. Mounting theArmature Assembly
P/N 3101128 ISSUE 1
501-1012DE-1-01
EM508 PAGE 2
Mounting holes
Armature
(base view)
Figure 4. Surface Housing
Acrylic Insulating Sleeve
1 3/4"
Door Plate 1 5/8"
DOOR
(2) #1/4-20 x 2"
screws provided
for a standard
1 3/4"
door
2" from floor to center
Contact plate
adjusting screw
Mounting holes
Armature
(base view)
2 Transfer points
Holes for
concealed
mounting
plate
Armature
(base view)
Top of
door
Lock edge
of door
2 3/8"
(60 mm)
2 5/8" (67 mm)
approx.
5" (127 mm)
approx.
1 11/16"
(43 mm)
2Holes for
mounting housing to wall
2Holes for mounting
magnet assembly to housing
Ground wire connection
Field wiring entrance hole
GND
1Hole for securing field
wiring protector