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Chapter 4 — System Installation ► Page 4 -15 from the cam arm is in the slot provided in the slide plate. • 3. Using a heat gun positioned approximately 12 in. from Continue moving the slide plate to the left until the latching the detector, apply heat to the detector for about one arm is in the locked position. minute. Overheating will cause damage to the detector. Applying heat to the detector will cause the control head Once the control head is set, pull the pull handle on the to operate. When the control head operates, the follow - remote pull station to assure that the control head operates. ing will take place: a) The slide plate will move fully to If the control head operates normally, the control head can the right; b) The indicator light on the solenoid monitor be reset as described above. Insert the pull pin into the hole will go out; and c) Any auxiliary equipment connected to in the slide plate above the latching arm. Replace the pull the dry contacts of the solenoid monitor and /or the station handle, pull pin, and nylon tie. micro switch in the control head will operate. If any of these events fail to occur, the problem must be investi- Assure that the gas valve is fully open by ratcheting the gas gated and repaired. valve ratchet wheel. 4. After all the thermal detectors have cooled, the control Using a felt- tipped marker, write the date of installation on head can be placed in the set position. To set the con - the carbon dioxide pilot cartridge. Screw the cartridge into trol head, the slide plate must be moved from right to the control head actuator until hand - tight. Never use a left, ensuring the bolt extending from the cam arm is in wrench to tighten the cartridge into the actuator. the slot provided in the slide plate. Continue moving the slide plate to the left until the latching arm is in the Remove the pull pin from the hole in the slide plate and locked position. install the control head cover. Insert the pull pin through the local manual control handle and into the bushing. Secure Testing Remote Pull Station the pull pin with the nylon tie provided. 1. Once the control head is set, pull the pull handle on the 2. Model ECH3- 24/120 Electrical Control remote pull station to assure that the control head oper- ates. If the control head operates normally, the control Head. head can be reset as described in Step 4 above. Before putting the system into service, all components must 2. Insert the pull pin into the hole in the slide plate above be checked for proper operation. During this checkout, the latching arm. ■ assure that the CO2 pilot cartridge is not installed in the control head actuator. Remove the pull pin from the hole in • 3. Replace the pull station handle, pull pin, and break rod. the slide plate. ► ' • Completing System Checkout CAUTION Make certain to remove the CO2 cartridge. Failure to • 1. Energize the actuation /detection circuit by depressing do so during testing will result in system actuation. the push button on the solenoid monitor. • 2. Using a felt- tipped marker, write the date of installation Testing Thermal Detectors on the CO2 pilot cartridge. Ensure that the actuator has an 0-ring installed, and screw the cartridge into the 1. Remove the electric control head cover. control head actuator until hand tight. Never use a wrench to tighten the cartridge into the actuator. 2. Test each detector individually and recock release mechanism after each test. • 3. Remove the pull pin from the hole in the slide plate and install the control head cover. Insert the pull pin through the local manual control handle and into the bushing. Secure the pull pin with the tie provided. NOTE Refer to NFPA -17 for additional inspection require- ments. ULEX 3437 CEx732 March 17, 2004