Dormakaba 8900 EMR User manual

8900 EMR
Surface Applied Closer with Detector
Installation instructions
08280990 – 03-2020
| EN |

28900 EMR 03-2020
08280990
dormakaba 8900 EMR Installation Instructions Table of Contents
Table of contents
1 Technical specifications 3
1.1 Overview 3
1.2 Preparation notes 3
2 Installation instructions 4
2.1 Installing track to frame 4
2.2 Install detector 4
2.3 Installing the slide channel 4
2.4 Install closer to door 5
2.5 Secure main arm 6
2.6 Secure arm to slide shoe 6
3 Adjustments 7
3.1 Adjust closing speeds: sweep, latch, backcheck,
delayed action 7
3.2 Adjust spring force 7
4 Wiring 8
4.1 Electrical specifications 8
4.2 Power supply 120 VAC, 50/60 HZ 9
4.3 Power supply 24V AC/DC 9
4.4 Power supply 24V AC/DC with remote
detectors 10
4.5 Wire gauge 11
4.6 SD-2 detector to main solenoid connection 12
4.7 SD-2 detector to auxiliary solenoid
connection 12
4.8 Solenoid attachment to UL/ULC listed alarm
control panel 12
4.9 SD-2 detector interconnection 13
4.10 SD-2 detector to remote area detector 14
4.11 SD-2 detector to audible signal appliance 14
4.12 SD-2 detector to remote alarm indicator lamp15
4.13 Alarm initiation wiring
(4 wire class B & 6 wire class A) 15
4.14 SD-2 detector sensitivity test
(ULC requirment only) 17
4.15 Hold open 17
4.16 Check connections 17
4.17 Engage hold open 17
4.18 Reset detector 18
4.19 Install detector cover 18
4.20 Install closer cover 18
4.21 Auxiliary stops 19
4.22 Unit testing 19
5 Maintenance 19
5.1 Maintaining the detector 19
5.2 Measure and record test voltage 19
5.3 Vacuum detector 20
5.4 Final steps 20
5.5 Smoke detector testing 21

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Technical specifications
1 Technical specifications
. Overview
Each 8900 EMR series unit contains a door closer, hold open
electromagnet, and smoke detector. The unit can be used as
a single installation or as a series of singles powered from one
or more power supplies. When a series of 8900 EMR units are
wired together in a run, groups of up to 5 units may be
interconnected. Interconnection is accomplished through
terminals #4 and #15 and results in all units alarming when
any one of them senses smoke. In turn, all associated hold
open electromagnets are de-energized. Within any run of
detectored units, it is permissible to form as many
interconnected groups as the total power supply amperage
will allow; but, again no more than 5 units can be
interconnected together.
. Preparation notes
Any detectored 8900 EMR series unit can be connected to an
auxiliary EMF non-detectored unit, or remote detector, or
both. It can be a single installation or part of any of the
multiple arrangements described above. An auxiliary unit
(double door applications) is a companion to the main unit,
and its electromagnet de-energizes along with the main unit.
A remote open area detector sensing smoke alarms the 8900
EMR to which it is connected and any other 8900 EMR to
which it is interconnected.
Single installations or groups of installations can be
connected to the alarm initiation circuit of a compatible UL/
ULC listed fire alarm control unit in 4-wire or 6-wire
configurations.
Additional functions are provided to separately power the
hold open electromagnets directly from the alarm control
panel as well as connections for a remote alarm indicator
lamp.
1. Read entire instruction sheet prior to installation
and refer to NFPA 72E. Standards may be
obrained from THE NATIONAL PROTECTION
ASSOCIATION, Batterymarch Park, Quincy, MA
02269.
2. Reference unit carton for unit mounting type.
3. Prepare door and frame for fasteners using the
appropriate template. Mark, drill, and tap holes
as indicated. If surface wiring is used, omit 7/8”
hole for wire access.
NOTE: If installing the optional bypass switch, install
assembly on the end of track as shown. Fasten track to
door frame with the screw provided (T mount uses a
cylindrical spacer). Fasten the end cap assembly with
metal or wood screws provided. Connect the switch
with wire nuts and slide the cover in place. For T mount,
place end cap in extension piece and fasten to frame
with screw provided.
Optional Bypass Switch -
PT Mount
Optional Track Bypass Switch -
T Mount

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Track
Detector
Slide channel
. Installing track to frame
2 Installation instructions
2.2.1 Slide detector slot under standoff and attach
with four screws.
NOTE: If construction is still being completed near
detector installation “DO NOT” install detector at this
time, or protect the detector from construction dust
contaminants.
. Install detector
Fig.
Fig.
2.1.1 8900T and 8900DE:
• Install with detector cut-out toward latch edge
of door.
• Use two 1/4-20x2” metal or two No. 14x2-3/4”
wood screws.
8900T and 8900DE
Standoff
8900PT
Hinge
Hinge
C
L
C
L
2.1.2 8900PT:
• Install with detector cut-out toward latch edge
of door.
• Use two 1/4-20x2” metal or two No. 14x2-3/4”
wood screws.
End cap End cap
Slot
. Installing the slide channel
Fig.
2.3.1 Remove one wire access plug according to the
installation type.
NOTE: Three access wire holes on optional surface
wired units only.
T & DE (RH)
T & DE (LH) (Surface conduit)
NOTE: No top plug on
PT mounts

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Closer
. Install closer to door
Fig.
Left hand door
8900T and 8900DE
Right hand door
8900PT
Right hand door
Left hand door

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Main arm
. Secure arm to slide shoe
Fig.
2.6.1 Secure arm to slide shoe. 2.6.2 Use 3/16” hex head wrench.
. Secure main arm
Fig.
2.5.1 Attach main arm
to door closer.
2.5.2 Place arm on top
pinion as shown
at 45° angle.
2.5.3 Secure with
pinion screw.
6mm hex key
Left hand door
Right hand door
8900T
8905DE
8900PT
Hinge
C
L
Hinge
C
L
2.5.1 Attach main arm
to door closer.
2.5.2 Place arm on top
pinion as shown
at 45° angle.
2.5.3 Secure with
pinion screw.
2.5.1 With door in closed position, rotate
spindle 45° with wrench.
2.5.2 Place arm on spindle.
2.5.3 Open door and secure with pinion screw.
Left hand doorRight hand door
Left hand door Right hand door
6mm hex key
6mm hex key 6mm hex key
45° 45°
Rotate
pinion
Rotate
pinion

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Closing speeds
Spring force
3 Adjustments
. Adjust closing speeds: sweep, latch, backcheck, delayed action
Fig.
Increase
Decrease
Decrease
Increase Backcheck &
Delayed action
Sweep & Latch
Speed
3.1.1 Adjust the closing sweep speed for the area from 70° - 0°
• Increase sweep speed: Turn valve counter-clockwise
• Decrease sweep speed: Turn valve clockwise.
3.1.2 Adjust the closing latch speed for the area from 7° - 0°.
• Increase latch speed: Turn valve counter-clockwise
3.1.3 Adjust the opening backcheck for the area from
70° - 175°.
• Increase resistance: Turn valve clockwise
• Decrease resistance: Turn valve counter-clockwise.
3.1.4 Adjust the closing delayed action for the area from
135° - 70°.
• Increase delayed action: Turn valve counter-clockwise
• Decrease delayed action: Turn valve clockwise
Latch
Backcheck
intensity
Sweep
Latch
Backcheck
Delayed action
Sweep
Delayed action
. Adjust spring force
Fig.
Increase
Decrease
8916: Supplied with a size 3 spring setting
8956: Supplied with a size 6 spring setting.
NOTE:
DO NOT ADJUST SPRING LOWER THAN SIZE 3.
Regular Mount, Pull side closers
Closer size Max door
weight (lbs)
Door width Full turns
Interior
8916
4 125 2'6" 0
5 150 3' +8
6 200 3'6" +16
8956 6 200 3’6” 0
6+ 250 4' +6
Backcheck
positioning valve

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Electrical specifications
4 Wiring
WIRE THE UNITS ACCORDING TO BUILDING AND SYSTEM REQUIREMENTS.
OBSERVE ALL APPLICABLE CODES.
Fig.
. Electrical specifications
Voltage input 24 VDC +10% - 15%
24 VAC +10% - 15%
NOTE: 120 volt applications require optional external
transformer
Maximum input current @24 VDC- 161 mA (1 solenoid), 310 mA (2 solenoids)
@24 VAC- 161 mA (1 solenoid), 310 mA (2 solenoids)
NOTE: Excludes accessories
Maximum output to remote alarm indicator lamp 300 mA
Contact ratings Alarm and or accessory contacts -
1.25 A at 24 VDC or .3 A at 120 VAC
resistive, maximum.
Trouble contacts - 500 mA at 24 VDC
resistive, maximum.
SD-2
Detector connection list
Function Terminal
AC/DC 24V INPUT 3, 14
ALARM CONTACTS (NORMALLY OPEN) 1, 2
ELECTROMAGNET 6, 9
REMOTE ALARM INDICATOR LAMP + 8
REMOTE ALARM INDICATOR LAMP - 7
INTERCONNECT + 15
INTERCONNECT - 4
TROUBLE CONTACTS (NORMALLY CLOSED) 5, 13
24 VDC OUTPUT (UNFILTERED) + 10
IF JUMPER WIRE J11/J12 IS CUT, TERMINALS 8,
9 AND 10 ARE CHANGED TO FORM C RELAY
CONTACTS, RAIL OUTPUT IS LOST, AND HOLD
OPEN ELECTROMAGNETS MUST BE
POWERED FROM A SEPARATE SOURCE.
CONSULT FACTORY IF REMOTE DETECTORS
ARE USED IN THIS APPLICATION.
COM 10
N.C. 9
N.O. 8
LED & TEST
13
12
1 8
29
103
4
5
6
7
15
14
11

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Wiring: power supply 120 VAC 50/60 Hz
Wiring: power supply 24 V AC/DC
. Power supply  VAC, / HZ
Fig.
120 VAC, 50/60 HZ: Connect the 120 VAC incoming voltage wires to the primary wires of the transformer.
Connect the secondary transformer wires to terminals #3 and #14 of the detector module. This connection is
not polarity dependent.
SD-2
Secondary
Transformer
Wires
13
12
18
29
10
3
4
5
6
7
15
14
11
Primary
Transformer
Wires
120VAC
Power
Input
External
Step
Down
Transformer
(Optional)
Note: For ULC installation,
transformer must install in 4” x 4”
electrical box x 3” deep minimum.
. Power supply V AC/DC
Fig.
24V AC/DC: The step down transformer is not used in this connection. Connect 24V AC/DC power to
terminals #3 and #14 on the detectors. These connections are not polarity dependent. If the unit is
connected to a second unit, connect terminal #3 of the first unit to terminal #3 of the second unit and
connect terminal #14 of the first unit to terminal #14 of the second unit. Continue this process for any
subsequent units to be powered from the same power supply.
SD-2 SD-2
SD-2
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
(3) (2) (1)
24 VAC/DC
power supply
+
-

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Wiring: power supply 24 V AC/DC with remote detectors
. Power supply V AC/DC with remote detectors
Fig.
24V AC/DC with remote detectors: The step down transformer is not used in this connection. Perform wiring
connections as illustrated below. Additional units are wired in the same manner as unit #2. Installations using
a combination of SD-2 modules with and without remote area detectors can be wired accordingly by
substituting the wiring diagram section from unit #1, #2, or #3 in step #3 above instead of unit #1, #2, or #3
below with remote detector. The vertical dashed lines indicate where one diagram would be exchanged for
another.
NOTE: Input voltage must match detector voltage.
SD-2
1
SD-2 SD-2
-
+
-
+
-
+
+
-
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
(3) (2) (1) 24 VAC/DC
power supply
Remote
Detector
Remote
Detector
Remote
Detector

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Wiring: wire gauge
. Wire gauge
Fig.
Wire gauge: The maximum wire gauge for wiring the SD-2 detector module is #18 AWG. The method for
determining wire gauge is given below. NOTE: A minimum of 20.4 VDC must be supplied to each solenoid in
the run.
Power
Supply
No. of
electro-
magnet
(E1)
No. of
electro-
magnet
(E2)
No. of
electro-
magnet
(E3)
No. of
electro-
magnet
(E4)
Wire length
to E1
(D1)
Wire length
to E2
(D2)
Wire length
to E3
(D3)
Wire length
to E4
(D4)
To next hold open
electromagnet
S1, S2, S3, etc. are the number of solenoids at each subsequent station. D1 is the distance from the power
supply to the first solenoid station. D2, D3, D4, etc. are the distances from the previous solenoid station to
the next solenoid station in the run. To determine the correct wire gauge multiply E1 times D1. Add that
quantity to E2 times D2. Repeat the same procedure for each electromagnet to test the last unit in the run.
Compare the quantity calculated to the chart below. The calculated value must be less than or equal to the
value corresponding to the appropriate wire gauge.
10 GAUGE-11,788 12 GAUGE-7,407 14 GAUGE-4,669 16 GAUGE-2,997 18-GAUGE-1,843
The procedure described above can be expressed in the following equation: (E1xD1) + (E2xD2) + (E3xD3)
......(EnxDn). The above values correspond to the wire gauge to be used. If the calculated value 1,843 #18
AWG wire can be run and connected directly to the detector module. If the calculated value exceeds 1,843
larger wiring will be required. Since the detector will only accept #18 AWG wire, a wiring splice will be
necessary as illustrated below.
SD-2
NOTE: For ULC installations, 18
gauge wire is required to detector.
#18
13
12
18
29
10
3
4
5
6
7
15
14
11
#18
#16 - #12
#16 - #12
#16 - #12
#16 - #12

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Wiring: SD-2 detector
Wiring: Solenoid attachment
. SD- detector to main solenoid connection
Fig.
SD-2
Strip approximately 1/4” of plastic insulation from the end of the two solenoid wires supplied. Connect one
end each of the electromagnet wires to terminals 6 & 9 of the SD-2 detector as shown.
13
12
18
29
10
3
4
5
6
7
15
14
11
Main hold open
electromagnet
. SD- detector to auxiliary solenoid connection
Fig.
Main hold
open
electromagnet
Auxiliary hold open
electromagnet
13
12
18
29
10
3
4
5
6
7
15
14
11
NOTE: Make this connection the same time as the main hold open
solenoid connection. Strip approximately 1/4” of plastic insulation
from the ends of the wires. Connect auxiliary hold open solenoid wires
to 9 & 6 of SD-2 detector.
. Solenoid attachment to UL/ULC listed alarm control panel
Fig.
UL/ULC listed
alarm control
panel
Hold open
electromagnet
Some applications may require input power to the hold open electromagnet to be supplied through a UL/ULC
listed alarm control panel so the hold open electromagnet functions separately from the internal detector
module. This application requires the alarm contacts of the SD-2 detector and any remote detectors to be
connected to the alarm contacts of the control panel. An alarm indication to the panel results in the loss of
power to the hold open electromagnets in the related zone, which allows the doors to closer. Wire main
electromagnet to alarm control panel as illustrated.
Power In
24Volt Only

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Wiring: SD-2 detector
. SD- detector interconnection
Fig.
1. Up to (5) SD-2 detectors, with or without connection to an auxiliary unit or remote area detector may
be interconnected. This limitation applies only to interconnected units and assumes a power supply
large enough to handle this load if the power supply is common to all units interconnected. Separate
power supplies may be used for each SD-2 detector while permitting the units to be interconnected.
2a. For units without connection to remote detectors, connect terminal #15 (+) between the units to be
interconnected. Connect terminal #4 (-) between the units to provide a common for the
interconnection. Additional units are wired in the same manner as unit #2 but no more than five (5)
units can be interconnected.
SD-2 SD-2 SD-2
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
(2)(3) (1)
2b. For units used in conjunction with remote area detectors, complete wiring connections as illustrated
below. Heed caution note in SD-2 DETECTOR TO REMOTE AREA DETECTOR section of instruction
sheet. Additional units are wired in the same manner as unit #2 but no more than five (5) units can be
interconnected. Installations using a combination of SD-2 detector modules with or without remote
area detectors can be wired accordingly by substituting the wiring diagram from unit 1, 2, or 3 in step
2a. above for unit 1, 2, or 3 below. The vertical dashed lines indicate where one (1) diagram would be
exchanged for another.
SD-2 SD-2 SD-2
.
13
12
18
29
10
3
4
5
6
7
15
14
11
(2)
(3) (1)
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
C
NO
C
NO
C
NO
Remote
Detector
Remote
Detector
Remote
Detector

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Wiring: SD-2 detector
. SD- detector to remote area detector
Fig.
CAUTION: A remote open area detector can only be connected to a unit whose trouble relay contacts (#5 &
#13) are connected in a circuit for the purpose of obtaining an audible trouble signal in the event of a circuit
fault. In the event that the unit is used for releasing service only, the trouble contacts are connected to the
trouble circuit of a UL/ULC listed alarm control panel. This condition is satisfied by the four (4) and six (6) wire
supervisory connections in the alarm initiation wiring section. Perform wiring connections as illustrated below.
NOTE: The SD-2 is wired as the E.O.L. (end of line) device for the remote detector. Therefore, it must act as the
last item in the loop.
SD-2
13
12
18
29
10
3
4
5
6
7
15
14
11
24V AC/DC
Power Supply
Remote
Detector UL/ULC listed audible
signal appliance
or control unit
. SD- detector to audible signal appliance
Fig.
1. Connect terminals #5 & #13 of
a singular unit directly to a UL/
ULC listed audible signal
appliance or alarm control
panel.
SD-2
2. Installations with multiple
units in a run must be
connected to a UL/ULC
listed audible signal
appliance or alarm control
panel as illustrated below.
13
12
18
29
10
3
4
5
6
7
15
14
11
UL/ULC listed audible
signal appliance
or control unit
SD-2 SD-2 SD-2
UL/ULC listed audible
signal appliance
or control unit
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11

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Wiring: SD-2 detector
Wiring: alarm initiation
. SD- detector to remote alarm indicator lamp
Fig.
Connect the positive wire of the remote alarm indicator lamp to terminal #8 of the detector module. Connect
the negative terminal of the indicator lamp to terminal #7 of the SD-2 detector.
SD-2
Remote
alarm
indicator
lamp
13
12
18
29
10
3
4
5
6
7
15
14
11
. Alarm initiation wiring ( wire class B &  wire class A)
Fig.
1. Make all connections as outlined previously for all units required by the job specifications.
2. Make all signal initiating connections as illustrated in the appropriate figure below. Note wiring differences
for units with remote detectors vs. units without remote detectors. Dashed lines to return loop represent
wires required for six (6) wire applications. These wires are omitted in four (4) wire applications.
3. Connections to only one (1) SD-2 are shown below.
SD-2 SD-2
-
+
+
-
+
-
+
-
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
Connections for
six (6) wire instllation
Connections for
six (6) wire instllation
Return
loop
UL/ULC
listed
initiating
circuit
Return
loop
UL/ULC
listed
initiating
circuit
Remote
detector
Alarm relay
*EOL *EOL
* EOL used in 4 wire applications only * EOL used in 4 wire applications only
CONTINUED ON NEXT PAGE

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Wiring: alarm initiation
Fig.
4. Connections for two (2) SD-2 detectors would consist of detector (1) in figure below connected to
detector (3) in the same manner as it is shown connected to detector (2). Detector (2) would be deleted.
5. More than three (3) SD-2 detectors are connected by inserting additional units with connections as
shown for unit 2. The last unit in the run must be connected in the same manner as unit 3.
SD-2
15
14
13
12
11
10
9
8
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
SD-2
15
7
5
14
13
12
11
10
9
1
6
4
3
2
8
*EOL
*EOL
-
+
+
-
+
-
+
-
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
13
12
18
29
10
3
4
5
6
7
15
14
11
(3) (2) (1)
Return
loop
UL/ULC
listed
initiating
circuit
Return
loop
UL/ULC
listed
initiating
circuit
Connections for
six (6) wire instllation
Connections for
six (6) wire instllation
(3) (2) (1)
Remote
detector
Alarm relay
Remote
detector
Alarm relay
Remote
detector
Alarm relay
* EOL used in 4 wire applications only
* EOL used in 4 wire applications only
6. In four (4) wire installations, it is the responsibility of the installer to supply and connect the E.O.L. resistor
specified by the fire alarm control panel used. The E.O.L. resistor is only installed in the first unit of the run
as illustrated.

dormakaba 8900 EMR Installation Instructions
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Wiring: alarm initiation
. SD- detector sensitivity test (ULC requirment only)
Fig.
Voltage output terminals are provided to measure the sensitivity of the smoke detector. With power applied to
the detector, connect a volt meter to the two test terminals. The normal range is between 1.27 - 3.38 Vdc.
Sensitivity test
terminals
FINAL INSTALLATION
AND TEST
. Hold open
Fig.
Hold open position is preset at approximately 90°. Loosen set screws using 3/32” hex wrench. Slide hold open
device to desired position. Retighten set screws securely.
Hold open device
Hold open set screws - 3/32” hex
Hold open force adjustment - 5/32 hex.
Clockwise = stronger
Less Hold Open Angle Greater Hold Open Angle
. Check connections
Fig.
After installation is completed, check all connections. The LED will blink every seven (7) to ten (10) seconds to
indicate the unit is operating properly.
LED
. Engage hold open
Fig.
Open door so slide shoe engages with hold open
assembly.
To test the detector, insert a small screwdriver into the
slot in the light pipe of the detector. Turn counter-
clockwise and hold for 10 seconds. The LED should
remain continually red and allow the door to close.

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18
Detector
Detector cover
Closer cover
. Reset detector
Fig.
Turn light pipe clockwise to reset the detector. The LED
will go off. Turn the light pipe to the normal position
and the unit will resume blinking every second (7) to ten
(1) seconds to indicate that it is reset and functioning
properly.
. Install detector cover
Fig.
Install detector cover. Slide tab of cover under end of detector and rotate into position. Insert (1) 4-40 screw
and tighten.
Detector Tab
Rotate
Screw
. Install closer cover
Fig.
Place tab in cover slot opposite main arm. Place cover over closer and fasten securely with screws provided.
LEFT HAND DOOR
SHOWN. RIGHT
HAND DOOR IS
MIRROR IMAGE.
Snap valve
adjustment
wrench inside
cover Tab

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Auxiliary stops
Maintenance
. Auxiliary stops
An auxiliary door stop (by others) must be installed to limit the maximum degree
of door swing. Failure to do so may result in damage to the unit.
. Unit testing
IMPORTANT: THE UNIT MUST BE TESTED AFTER THE INSTALLATION, BY THE
END USER, TO ASSURE THAT THE DOOR CLOSER UNITS FUNCTION PROPERLY
WHEN THE ALARM SYSTEM IS ACTIVATED. THE ENTIRE SYSTEM MUST ALSO
BE TESTED PERIODICALLY AFTER THE INITIAL INSTALLATION TEST, IN
CONJUNCTION WITH THE TESTING OF THE FIRE ALARM SYSTEM. THE END
USER IS ALSO RESPONSIBLE FOR THE ADJUSTMENTS AND MAINTENANCE
TO RETAIN THE SYSTEM IN WORKING ORDER.
5 Maintenance
. Maintaining the detector
Fig.
The SD-2 detector has been designed to be as maintenance-free as possible.
Normal air-borne dust, however, can accumulate in the detector sensing chamber
and cause it to become more sensitive. All detectors must be tested and cleaned
at least once a year. Detectors in dusty environments must be tested and cleaned
more often. Detectors must also be tested and cleaned immediately after a fire.
Failure to maintain detectors may result in needless false alarms.
. Measure and record test voltage
Fig.
Measure and record test voltage at test points RP1 & RP2. This voltage is a small signal, DC voltage. Set meter
to the 2 volt scale.
RP1
RP2

dormakaba 8900 EMR Installation Instructions
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20
Maintenance
. Vacuum detector
Fig.
First, vacuum or blow off any loose debris on the outside of cover. Then remove the detector cover and screen
assembly by rotating a flat screwdriver in slot (both sides) and pulling it straight up. Cover may be difficult to
remove the first time.
Vacuum all areas illustrated below, and then blow off same areas with compressed air. Before reassembling
the detector, be sure all parts are free of debris.
. Final steps
Replace cover and screen assembly.
Measure and record test voltage at test points RP1 & RP2. If the product is operating normally, and was
cleaned effectively, the test voltage will be less than the voltage recorded earlier. (Typical voltage for a clean
device is .9 - 1.58 Vdc.)