1. Manuals
  2. Brands
  3. Velocity Manuals
  4. Smoke Alarm
  5. VDOT-PYH3
  6. Instruction manual

Velocity VDOT-PYH3 Instruction Manual

Analog photoelectric smoke/heat detector
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Instruction Manual
VDOT-PYH3
Analog Photoelectric Smoke/Heat Detector
Before Installation
Please read these instructions carefully and keep for future reference.
The information in this document is subject to change without notice. For updates please refer to our website.
Note: Follow the requirements for the installation of the product in accordance with the Specifications. Otherwise it may
cause malfunction.
Note: Do not install the product in any location where oil, dust, iron powder, chemicals, or hydrogen sulphide may occur
or affect the product. It may cause damage to equipment.
Section 1 – INTRODUCTION
1.1
General description
The VDOT-PYH3 is an attractively-styled, low profile, analog addressable, combination photoelectric smoke/heat
detector for use with the Velocity MMP Control Panel series in analog fire alarm systems.
This analog addressable combination smoke/heat detector has a specific detector address to provide exact detector
locations throughout the installation. This allows for constant monitoring of the detector sensitivity and reports the
detector's condition to the fire alarm control panel.
1.2
LED Indicator
LED Indicators for 360° visibility (OMNIVIEW
Green LED flashes in normal operation.
Red LED illuminates and Green LED flashes in an alarm condition.
TM
360°) of VDOT-PYH3 operate as follows:
1
ZETA ALARMS LIMITED
72-78 MORFA ROAD, SWANSEA, SA1 2EN
https://www.velocitydetection.com
GLT-337-7-4 Rev.0
May. 31, 2023

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the VDOT-PYH3 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Velocity VDOT-PYH3

Summary of Contents for Velocity VDOT-PYH3

  • Page 1: Section 1 - Introduction

    The VDOT-PYH3 is an attractively-styled, low profile, analog addressable, combination photoelectric smoke/heat detector for use with the Velocity MMP Control Panel series in analog fire alarm systems. This analog addressable combination smoke/heat detector has a specific detector address to provide exact detector locations throughout the installation.

  • Page 2: Section 2 - General Operation

    The VDOT-PYH3 heat detector portion initiates an alarm in response to both 8.3 °C (15 °F) rate-of-rise temperature or a 57 °C (135 °F) fixed temperature alarm point. Heat detector portion incorporates a highly linear thermistor circuit, with the thermistor mounted externally.

  • Page 3: Section 3 - Dimensions

    15.0 (0.59) 42.0 (1.65) 104.0 (4.09) mm (Inch) Figure 1: Dimension of VDOT-PYH3 Section 4 – TERMINALS The VDOT-PYH3 combination smoke/heat detectors have three terminal connections and the terminals are configured as follows: Table 1: Terminal function Terminal Description SLC Positive...

  • Page 4: Section 5 - Base Models

    Section 5 – BASE MODELS There are 5 mounting bases that are available for use with the VDOT-PYH3. In order to operate correctly, it is important to use the appropriate mounting base as indicated in the table below. Refer to the specific mounting base instruction manuals for details.

  • Page 5: Location Requirement

    7.1.1 Location requirement When installing the detector please consider the following items. Otherwise the detector might not provide optimum performance. Indoor use only. Place the detector away from a ventilation fan or the air outlet of air conditioner, at least 1.5 m (5 ft.). On the ceiling, place the detector at least 10 cm (4 in.) from the wall.
  • Page 6 7.2.1 Spacing of heat detectors Spot type heat detector spacing is based on detector installation on a flat smooth ceiling at 3 m (10 ft.) high. Spacing of spot type detector is shown in Figure 2. The coverage area of a detector is represented as a square. Actual detector coverage covers a circle whose radius is 0.7 times the listed spacing.
  • Page 7 Listed Spacing 9.1m x 9.1m = 84m (30ft x 30ft = 900ft A : 7.6m x 10.4m = 79m (25ft x 34ft = 850ft B : 6.1m x 11.3m = 69m (20ft x 37ft = 740ft C : 4.6m x 11.9m = 54m (15ft x 39ft = 585ft D : 3.1m x 12.5m = 38m (10ft x 41ft = 410ft...
  • Page 8 The following figure shows the required heat detector spacing for a 60.9 m (200 ft.) by 60.9 m (200 ft.) room with a 3m (10 ft.) ceiling. Figure 6 shows 16 heat detectors with the required spacing of S = 15.2 m (50 ft.). 60.9 m (200 ft.) 7.6 m (25 ft.)
  • Page 9 7.2.2 Ceiling construction and heat detectors When installing heat detectors on other than flat and smooth ceilings or at ceiling height greater than 3 m (10 ft.), spacing must be adjusted. The table below shows the reduction in listed spacing to be applied when detectors are mounted on ceilings higher than 3 m (10 ft.).
  • Page 10 Detectors on Solid joists bottom of joists Figure 8: Heat detector spacing — solid joist construction (plan view) 7.2.4 Exposed beams Exposed beams may impede the heat flow to the detectors. Beams are defined as members extending 10 cm (4 in.) or more down from the ceiling and spaced more than 91 cm (36 in.) apart.
  • Page 11 deep beams Beam deep beams and Heat detector wide spacing Beam S = 15 m (50 ft.) 2/3 S = 10 m (33 ft.) 1/2 S = 8 m (25 ft.) 1/3 S = 5 m (17 ft.) Figure 10: Heat detector spacing — beam construction (plan view) GLT-337-7-4 Rev.0 May.
  • Page 12 7.2.5 Sloping ceiling (peaked and shed) In the rooms with peaked ceilings, the first row of detectors must be located within 91 cm (36 in.)(measured horizontally) of the ceiling peak, but not closer than 10 cm (4 in.) vertically to the peak. Additional detectors, if required, must be located based on the horizontal projection of the ceiling and the type of ceiling construction.
  • Page 13 Smoke detector applications Smoke detectors are designed to sense the presence of smoke particles. In order to sense the particles, smoke detectors must be placed where smoke can reach them. When determining the location of smoke detectors, potential fire locations should first be evaluated, and paths of smoke flows should be determined. It is preferable to conduct actual field tests wherever it is practical to do so.
  • Page 14 7.3.3 Stratification Stratification of air in a room can hinder smoke from reaching ceiling-mounted smoke detectors. In order to improve detection response in situations where stratification exists, it might be necessary to install additional smoke detectors on sidewalls or at locations below the ceiling, as shown in Figure 13. Figure 13: Smoke detector layout accounting for stratification 7.3.4 Partitions...
  • Page 15 7.3.5 Exposed solid joists Exposed solid joists may impede the flow of smoke to detectors. A joist is defined as greater than 10 cm (4 in.) in depth and spaced less than 91 cm (3 ft.) apart. The detectors must be mounted on the bottom of the joists. CEILLING SECTION Less than 91cm (3 ft.) Solid joist...
  • Page 16 7.3.6 Exposed beams Beams are defined as any members extending 10 cm (4 in.) or more down from the ceiling and spaced more than 91 cm (3 ft.) apart. The spacing of smoke detectors must be reduced in the direction perpendicular to the beam. Smoke detectors shall be located on the ceiling in each beam pocket if the ratio of beam depth (D) to ceiling height (H), D/H, is greater than 0.1, and the ratio of beam spacing (W) to ceiling height (H), W/H, is greater than 0.4.
  • Page 17 Procedure for installing Note: All wiring must be installed in compliance with the National Electrical Code, applicable local codes and the Authority Having Jurisdiction. Proper wire gauges should be used. The installation wires should be color coded to limit wiring mistakes and ease system troubleshooting.
  • Page 18 SLC Line impedance is 50Ω at maximum and the maximum length is 2km. Refer to the manual of UL Listed Velocity MMP Series control panel (VL-MMP/6, VL-MMP/10, VL-MMP/26) to determine correct maximum loop load and maximum loop resistance for devices connected to each loop.

  • Page 19: Section 8 - Testing

    Tamper resistance feature The VDOT-UB series, VDOT-S6 Base, and VDOT-STB series of smoke/heat detector mounting bases have a tamper- resist feature that works in conjunction with the detectors. W hen this feature is enabled, the detectors cannot be removed from the base without the use of a small hexagonal wrench. To avoid unauthorized removal of the detector, turn the locking screw in the mounting base counterclockwise until the screw extends out about 4 mm (3/16 in.) from the rim of the base, as shown in Figure 20.

  • Page 20: Section 9 - Maintenance

    Check that the detector gives an alarm condition within 15 seconds. Check the red LED indicator is on and the green LED is flashing on the VDOT-PYH3 combination detector. If the red LED fails to light, check the power to the detector and the wiring in the detector base.

  • Page 21: Section 10 - Specifications

    Section 10 – SPECIFICATIONS Table 3: Specifications Smoke : Light Emitting Diode Photo Diode Detector Element Heat: Thermistor Stand-by: Flashing green LED LED Visual Indicator Alarm: Solid red LED with flashing green Operating Voltage Range 20 VDC to 38 VDC peak System Voltage 35VDC Stand-by Current...

  • Page 22: Section 11 - Warranties

    Section 11 – WARRANTIES Zeta warrants to the customers that: all products supplied hereunder will be of merchantable quality and will comply with any specification agreed between Zeta and customer. it is not aware of any rights of any third party in the market which would or might render the sale of the products, or the use of any of the trade marks on or in products, or the use of any of the trade marks on or in relation to the products, unlawful.

  • Page 23: Customer Code

    Annex A Quick Instruction of VDOT-AD2 This quick instruction of VDOT-AD2 is prepared to VDOT-PYH3. Please refer to “VDOT-AD2 programmer instruction manual” for details. Preparation VDOT-AD2 requires two 9v PP3 batteries. a) Before inserting the batteries, confirm the VDOT-AD2 is switched off and check polarity of battery, or damage could result.
  • Page 24 Pressing any key at any time during the information collection cycle, forces the VDOT-AD2 to display the address, and await new address selection. Set new address +100, +10, +1 keys are used to select the new address. Press the [Set] key a) The buzzer sounds, and all LED’s are turned off.

Table of Contents