This sensor must be installed in compliance with the control panel system
installation manual and the SWIFT Wireless Manual. The installation must
meet the requirements of the Authority Having Jurisdiction (AHJ). Sensors
offer maximum performance when installed in compliance with the National
Fire Protection Association (NFPA); see NFPA 72.
GENERAL DESCRIPTION
Models WSK-HEAT and WSK-HEAT-ROR are intelligent sensors that utilize a
state-of-the-art thermistor sensing circuit for fast response. These sensors are
designed to provide open area protection with 50 foot spacing capability as
approved by UL 521. Model WSK-HEAT is a fixed temperature sensor with
135°F fixed temperature alarm. Model WSK-HEAT-ROR is a rate-of-rise tem-
perature sensor with 135° F fixed temperature alarm. Rotary dial switches are
provided for setting the sensor’s address. (Figure 1). Two LEDs on the sensor
are controlled by the panel to indicate sensor status.
Silent Knight panels offer different features sets across different models. As a
result, certain features of the WSK-HEAT and WSK-HEAT-ROR may be avail-
able on some control panels, but not on others. The possible features available
in the WSK-HEAT and WSK-HEAT-ROR, if supported by the control panel are:
• The panel controls the LED operation on the sensor. Operational modes
include red, green and amber colors in various solid or blink patterns.
Please refer to the operation manual for the UL listed control panel for specific
operation of the WSK-HEAT and WSK-HEAT-ROR .
The WSK-HEAT and WSK-HEAT-ROR require compatible addressable com-
munications to function properly. Connect these sensors to listed-compatible
control panels only.
SPACING
Wireless technologies can exhibit communication disruption if devices are
spaced too close together. To avoid this form of disruption, SWIFT devices
should not be placed closer than 2 feet (60 cm) apart without an intervening
structure.
NOTE: Do not attach the base and detectors to temporary structures such as
removable ceiling tiles such that the placement could be altered. To prevent
changes in device placement, permanently secure the structure or mount the
detector across the ceiling panel support as shown in Figure 2.
I56-427
0-000
INSTALLATION AND MAINTENANCE INSTRUCTIONS
SPECIFICATIONS
Maximum Operating Voltage:
3.3 VDC
Maximum Standby Current:
210µA
LED Current:
10 mA
Maximum Transmit RF Power:
17dBm
Radio Frequency Range:
902-928 MHz
Operating Humidity Range:
10% to 93% Relative Humidity, Non-condensing
Installation Temperature:
32°F to 100°F (0°C to 38°C)
Fixed Temperature Rating:
135°F (57°C ) WSK-HEAT and WSK-HEAT-ROR
Rate-of-Rise Detection:
Responds to greater than 15°F/minute WSK-HEAT-ROR
Battery Type:
4 Panasonic CR123A or 4 Duracell DL123A
Battery Life:
2 year minimum
Battery Replacement:
Upon TROUBLE BATTERY LOW display and/or during annual maintenance
Height:
2.4˝ (61 mm) installed in B501W Base
Diameter:
4.0˝ (102 mm) installed in B501W Base
Weight:
8.1 oz. (230 g) installed in B501W base with 4 batteries
BATTERY REPLACEMENT
Low battery levels on the wireless devices are displayed as a trouble on an
annunciator. Therefore when the message “TROUBLE BATTERY LOW” is dis-
played, replace the battery in the device. This message is an indication that
approximately one week of battery life remains.
To replace the batteries in a wireless device use the following steps:
1. Have 4 CR123A (or DL123A) batteries available
2. Remove the detector from the base.
3. Open the battery compartment refer to Figure 3. Note: The battery compart-
ment cover may be left attached at the hinges during battery replacement.
4. Remove the used batteries and replace with new batteries. The battery
compartment is designed such that the batteries can only align in the ap-
propriate direction. Do not force the batteries into the openings.
5. Replace the battery compartment cover.
6. Return the device to its original location.
CAUTION
Dust covers provide limited protection against airborne dust particles during
shipping. Dust covers must be removed before the sensors can sense smoke.
Remove sensors prior to heavy remodeling or construction.
TAMPER RESISTANCE
Models WSK-HEAT and WSK-HEAT-ROR include a tamper-resistant capability
that prevents their removal from the base without the use of a tool. Refer to
the base manual for details on making use of this capability. The base also
includes a magnet for tamper resistance. The magnet activates a supervisory
tamper fault at the panel if the detector is removed from the base.
TESTING
Before testing, notify the proper authorities that the system is undergoing
maintenance, and will temporarily be out of service. Disable the system to
TENS
ONES
9
10
11
12
13
14
15
8
7
6
5
4
3
2
1 0
9
8
7
6
5
4
3
2
1 0
C0162-00
FIGURE 1. ROTARY ADDRESS SWITCHES:
12 Clintonville Road, Northford, CT 06472-1610
Phone: 203-484-7161 Fax: 203-484-7118
www.silentknight.com
WSK-HEAT & WSK-HEAT-ROR
Wireless Intelligent
Temperature Sensors
1
I56-4270-000
03-02