Edwards Signaling E-PHD User Manual
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E-PHD Photoelectric and Fixed Temperat ure
Heat Detector Installation Sheet
Operation
The E-PHD Photoelectric and Fix ed-Temperature Heat
Detector uses an optical sensing chamber to detect smoke and
a fixed-temperature heat sensor to detect heat from fire. The
detector analyzes the sensor data to determine when to initiate
an alarm. The detector continuously monitors changes in
sensitivity due to the environment (e.g., dirt, smoke,
temperature, humidity) and notifies the control panel of its
condition. The heat sensor monitors the temperature of the air
in its surroundings and determines whether an alarm should be
initiated.
The detector is capable of performing comprehensive selfdiagnostics and storing the results. The detector issues a dirty
sensor warning when it reaches its preset limit. This notifies
the operator of the need for service while the detector is still
operating.
LED operation
The detector provides a bicolor LED that shows its status.
• Normal: Green LED flashes
• Alarm/active: Red LED flashes
Installation
Refer to Edwards Signaling Smoke and Heat Detectors
Applications Bulletin (P/N 3101212) for additional information
on detector placement and spacing.
WARNINGS
• To ensure proper operation, store the detector within the
recommended ranges. Allow the detector to stabilize to
room temperature before applying power.
• Keep the dust cover (supplied) on the detector during
installation and remove it prior to commissioning and
service. The dust cover is not a substitute for removing the
detector during new construction or heavy remodeling.
To install the detector:
1. Install and wire the detector base using the installation
sheet supplied with the detector base.
2. Set the detector address. Refer to the panel technical
reference manual for a list of valid addresses. Use a
screwdriver to adjust the two rotary switches on the back
of the detector. Set the left rotary switch (0 through 12) for
the 10s and 100s digit and the right rotary switch for the 0
through 9 digit.
3. Connect the detector to the base by rotating the detector
clockwise until it snaps into the locked position.
The head can be removed by turning it counterclockwise.
4. If the head must lock to the base, break away the locking
tab using a pair of pliers.
To then remove the detector head after breaking away the
locking tab, insert a small screwdriver into the slot on the
side of the base and press in while simultaneously turning
the detector head counterclockwise.
Figure 1 : Setting detector address (address 32 shown)
• This detector does not operate without electrical power. As
fires frequently cause power interruption, discuss further
safeguards with the local fire protection specialist.
• This detector does not sense fires in areas where smoke
cannot reach the detector. Smoke from fires in walls,
roofs, or on the opposite side of closed doors may not
reach the detector.
• Photoelectric detectors have a wide range of sensing
capabilities, but are best suited for detecting slow,
smoldering fires.
• To ensure proper operation, schedule ma inte nan ce
(regular or selected) in accordance with the requirements
of the authority having jurisdiction. Refer to NFPA 72 and
CAN/ULC−S536.
© 2013 UTC Fire & Security. All rights reserved. 1 / 4 P/N 3101208 • REV 03 • REB 28JAN13
1. Insert screwdriver here
Figure 2: Breakaway tab
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Detector body
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Detector cap
Optical block
chamber
Slot to insert
screwdriver
Optical block base
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Figure 3: Detector disassembly
1. Breakaway tab
Maintenance
Cleaning the detector
When cleaning is necessary, the sensing chamber of the
detector unsnaps for easy field cleaning and service.
Note: Only the smoke element of the detector requires
cleaning.
To clean the detector:
1. Remove the detector from the base.
2. Insert a screwdriver in the small slot where the detector
cap connects to the detector body.
3. Pry the detector cap off the detector body.
4. Squeeze the optical block chamber where the two arrows
point, labeled “squeeze here.”
5. Pull off the optical block chamber.
6. Blow off the optical block base in the detector body using
clean compressed air.
7. Snap a new optical block chamber in place. Make sure
you line up the two arrows on the block chamber with the
snaps on the optical block base.
8. Connect the detector cap to the detector body by rotating
the cap clockwise until it snaps into a locked position.
9. Install the detector onto the base.
Note: To verify the effectiveness of the cleaning,
recalibrate the device and run a device maintenance
report. Refer to the control panel technical reference
manual.
10. Test the detector and verify sensitivity.
1. Slot to insert screwdriver
2. Optical block chamber
3. Detector body
4. Optical block base
5. Detector cap
Test
NFPA 72 and CAN/ULC−S537 code require calibrated
sensitivity test upon completion of the original installation and
following any modifications or additions to the system. The
detector can perform this test and generate a system
sensitivity report.
Note: Test both the smoke element and the heat element of
the detector.
To test the detector:
1. Before initial testing, remove the dust cover from the
detector and notify the proper authorities that the fire
alarm system is undergoing maintenan ce and will be
temporarily out of service.
2. Test the detector’s smoke element using Smoke ! In A Can
(model SM-200), canned smoke. Carefully follow
directions on the can to avoid damage to the detector.
3. Test the detector’s heat element using a heat gun
maintaining a six-inch minimum distance. Use caution as
excess heat can damage the detector and detector
housing.
2 / 4 P/N 3101208 • REV 03 • REB 28JAN13
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