Kidde FX-PDD - User Manual

© 2020 Carrier 1 / 6 P/N 3101069-EN • REV 005 • ISS 19OCT20
FX-PDD Duct Smoke
Detector Installation Sheet
Description
The FX-PDD Duct Smoke Detector is designed for use in duct
applications where temperatures can exceed standard detector
capabilities.
The device address is set using the two rotary switches located on
the front of the unit. One device address is required.
In installations where the controls and indicators are hidden from
view, a remote test station or an LED indicator can be connected to
the detector to provide these functions.
Jumper settings
The following jumper settings determine the operation of the
detector. See Figure 6 for proper jumper location.
Table 1: JP3 jumper settings
Setting
Description
Alarm
Configures the detector for alarm latching
operation.
Supervisory
Configures the detector for supervisory
operation.
This is the factory default setting.
LED operation
Two LEDs, visible from the front of the detector, show its status.
Table 2: LEDs
LED
Description
Power LED
Off when the detector is in the alarm state.
Flashes intermittently when the detector is in
the normal state.
Alarm/active LED
Indicates the detector is in the alarm/active
state.
Installation
WARNINGS
• The duct smoke detector is not intended as a substitute for open
area protection.
• This detector does not operate without electrical power. As fires
frequently cause power interruption, discuss further safeguards
with the local fire protection specialist.
• The duct smoke detector does not operate as designed outside
of the listed electrical and environmental specifications.
• The duct smoke detector does not sense smoke unless the
ventilation system is operating and the sensor’s cover is
properly installed.
• The duct smoke detector may not operate as designed unless
installed in accordance with these instructions and all applicable
national and local codes as determined by the local authority
having jurisdiction.
Note: Read these instructions thoroughly before installing. Refer to
Application Bulletin P/N 3101107 for additional information regarding
installation instructions.
Installation guidelines
To ensure correct operation, install the duct detector using the
following guidelines:
• Install the duct smoke detector on a flat section of HVAC duct
between six and ten duct widths from any bends or obstructions.
• Install supply-side detectors at a point downstream from the
supply fan and after the air filter.
• Install return-side detectors at a point before the return air
stream is diluted by outside air.
Verifying the duct air velocity
In order to verify the airflow direction and velocity, air must be
moving through the HVAC system.
To verify the duct air velocity:
1. Drill a small hole at the point where the duct smoke detector is
being installed.
2. Using the SD-VTK Air Velocity Test Kit and a suitable air
velocity meter, verify that the air velocity in the HVAC duct falls
within the specified operating range of the detector and note
which direction the air flows.
3. If the air velocity does not fall within the specified range, relocate
the detector and seal the hole in the HVAC duct. Refer to
Application Bulletin P/N 3101107 for additional information
pertaining to installation locations.
firealarmresources.com

Summary

Installation

Warnings

Key safety warnings and limitations for the duct smoke detector.

Installation Guidelines

Best practices for proper installation of the duct smoke detector.

Sampling Tube Selection and Detector Assembly

Selecting an Appropriate Sampling Tube

Guidance on choosing the correct sampling tube length for duct width.

To Assemble the Detector

Steps for assembling the duct smoke detector unit.

Detector Installation and Configuration

To Install the Detector

Detailed steps for physically mounting the detector in the HVAC duct.

Set Module Address

Instructions for setting the detector's unique address using rotary switches.

Set Jumper JP3

Guidance on setting the JP3 jumper for specific detector operations.

Testing and Verification

Verifying Air Pressure Differential

Detailed steps to verify air pressure differential meets detector specifications.

Testing the Duct Smoke Detector

Procedure to ensure the duct smoke detector is operating correctly after installation.

Maintenance

Replacement Parts

List of available replacement parts for the duct smoke detector.

Cleaning the Duct Smoke Detector

Instructions and precautions for cleaning the duct smoke detector.

Regulatory Information

Contact Information

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The Kidde FX-PDD Duct Smoke Detector is designed for use in HVAC (Heating, Ventilation, and Air Conditioning) duct applications, particularly in environments where temperatures may exceed the capabilities of standard detectors. This device is a crucial component for fire safety systems, providing early detection of smoke within the air distribution network. It is important to note that this duct smoke detector is not intended as a substitute for open area protection.

Function Description:

The primary function of the FX-PDD is to detect smoke within the airflow of an HVAC duct. When smoke is detected, the device triggers an alarm, signaling a potential fire event. The detector operates by sampling air from the duct through a sampling tube and an exhaust tube. The internal photoelectric sensor then analyzes the sampled air for the presence of smoke particles.

The device address is configured using two rotary switches on the front of the unit, allowing for unique identification within a fire alarm system. For installations where the detector's controls and indicators are not easily visible, a remote test station or an LED indicator can be connected to provide these functions remotely.

Jumper settings on the device determine its operational mode:

• Alarm: Configures the detector for alarm latching operation, meaning it will remain in an alarm state until reset.
• Supervisory: Configures the detector for supervisory operation, which is the factory default setting.

Two LEDs on the front of the detector provide visual status indications:

• Power LED: Off when the detector is in an alarm state; flashes intermittently when in the normal state.
• Alarm/active LED: Indicates when the detector is in the alarm/active state.

Important Technical Specifications:

• Communication Line Voltage: 20 Vp-p max.
• Operating Current:
  • Normal: 45 µA
  • Alarm: 45 µA
  • Inrush: 1 mA
• Common Alarm Relay/Auxiliary Equipment: Unsupervised and power-limited.
  • Quantity: 1
  • Type: Form C
  • Rating: 2.0 A at 30 VDC (resistive)
• Air Velocity: 100 to 4,000 ft./min
• Air Pressure Differential: 0.005 to 1.00 in. of water
• Smoke Sensitivity Range: 0.79 to 2.46%/ft. obscuration
• Smoke Detection Method: Photoelectric (light scattering principle)
• Alarm Test Response Time: 5 seconds
• Dimensions: 8.70 × 5.45 × 1.90 in.
• Wire Size: 14 to 22 AWG wire
• Operating Environment:
  • Temperature: 32 to 122°F (0 to 50°C)
  • Relative Humidity: 0 to 93%, noncondensing
• Regulatory Standards: UL 268A, CAN/ULC S529-02

Usage Features:

• Sampling Tube Selection: Sampling tubes are available in various lengths (8, 18, 24, 36, 42, 60, 78, 120 inches) to accommodate different duct widths. The selected tube should extend at least two-thirds across the duct width, or be longer than the width for ducts exceeding 36 inches.
• Installation Guidelines:
  • Install on a flat section of HVAC duct, 6 to 10 duct widths away from bends or obstructions.
  • Supply-side detectors should be installed downstream from the supply fan and after the air filter.
  • Return-side detectors should be installed before the return air stream is diluted by outside air.
  • The air sampling tube's inlet holes must face the direction of airflow.
  • Sampling tubes longer than 36 inches require support at both ends.
• Address Setting: The device address (01 to 127, depending on the control panel) is set using TENS (10s and 100s digit) and ONES (0 through 9 digit) rotary switches.
• Air Velocity Verification: Before installation, the duct air velocity must be verified using an air velocity meter to ensure it falls within the specified operating range (100 to 4,000 ft./min).
• Air Pressure Differential Verification: After installation, the air pressure differential between the sampling and exhaust tubes must be verified to ensure it falls within the specified operating range (0.005 to 1.00 in. of water).
• Wiring: Wiring must comply with NFPA 72 and CAN/ULC-S524, observing terminal polarity. Auxiliary equipment wiring can be power-limited or nonpower-limited, requiring specific separation guidelines.
• Accessories: Compatible accessories include remote test-reset stations (SD-TRM, SD-TRK, SD-MAG), an air velocity test kit (SD-VTK), and a remote LED alarm indicator (R-LED).

Maintenance Features:

• Cleaning: The duct smoke detector should be cleaned when it reaches 80% to 99% dirtiness or sooner if conditions warrant.
  • Before cleaning, disable the detector or zone to prevent false alarms and notify authorities.
  • Remove the detector's cover and disconnect SLC wiring to power down the detector.
  • Use a vacuum cleaner, compressed air, or a soft bristle brush to remove loose dirt and debris from the detector housing and cover.
  • Clean the gasket on the detector's cover with isopropyl alcohol and a lint-free cloth.
  • Squeeze retainer clips to lift the optic housing from the printed circuit board.
  • Gently remove dirt and debris from around the optic plate and inside the optic housing.
  • Replace the optic housing and detector cover, then reconnect SLC wiring.
  • Test the detector and verify its sensitivity after cleaning.
• Replacement Parts: A PCB replacement kit (FX-SDPCB) is available for maintenance.
• Testing: After installation and maintenance, the detector must be tested to ensure correct operation. This includes verifying air pressure differential and overall functionality.

Kidde FX-PDD Specifications