N0~.625,626,6274628, ,.-, &629 y FIRE ‘EARLY WARNING SYSTEM GENERAL INFORMATION

Ademco’s Fire Early Warning System is designed for use in nursing homes, office buildings and other relatively clean environments requiring extensive fire pro- tection. A basic system consists of:

A No. 625 Master Control which monitors detector and bell circuits and comes complete with a built-in, 24 volt, 5 ampere hours rechargeable standby power supply. Used alone, the No. 625 can monitor one zone of 20 No. 6270 Detectors.

No. 6270 Products of Combustion Detectors which detect fire at its earliest stages before smoke, flames or significant heat develop. Up to 20 detectors may be put on each zone loop. A total of 100 detectors may be put on a complete five-zone system.

No. 629 End-of-Line Modules which permit supervision of detector and bell loops. One No. 629 must be used at the end of each detector loop; one must be used at the end’of the No. 625’s bell loop.

Up to four additional detection zones may be added to the system using:

I . A No. 626 Zone Module Cabinet which holds four No. 628 Zone Modules.

2. No. 628 Zone Modules which are capable of monitoring 20 No. 6270 Detec- tors. A complete five-zone system can thus.incorporate as many as 100 detectors.

Though the system is primarily designed to monitor No. 6270 Detectors, it can also be used to monitor thermostats and manual pull stations. It is not designed for use with other smoke detectors such as the Ademco No. 527.

No. 627 PRODUCTS OF COMBUSTION DETECTOR:

Principle of Operation, Detectors: Within each No. 6270 Detectors are two impedances placed in series, one a reference impedance and the other a “Detect ion Chamber” (see Diagram 1).

Reference lmpedence

t

A Alarm Trigger

Detection Cha*r

Diagram 1: DETECTOR OPERATION

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Under normal conditions,,a tiny radioactive element ionizes’air molecules enter- ing the chamber and creates a stable resistance and voltage drop across the chamber. When combustion particles 2 fire -

the first to be given off by a developing enter the chamber, they increase the chamber’s resistance because they

are larger and slower moving than air molecules. Voltage drop across the chamber increases and reduces the drop across the fixed impedance. Voltage coming to Point A (see Diagram I) .increases as does voltage input to the detector’s elec-

larm. tron i c “trigger”-which in turn sets off an a

Placement, Detectors:

A No. 6270 Detector should be placed as close to the center of a cei,ling as

LOCATE DETECTOR HERE

possible. Central location is ideal for sensing fires in any part of a room. Avoid placing a No. 6270 on a wall. Products of combustion from a fire rise to the ceiling, spread out across its surface and begin to travel down along or near the walls. A detec- tor mounted on the ceiling will sense a developing fire faster than a detec- tor mounted on a wall.

NOT HERE

Diagram 2: CENTER CEILING MOUNT

If center I’ocation on the ceiling is not poss’i.ble, be sure to .avoid the “dead” air spaces that exist at the junction of the ceiling and wal Is. Combustion products have difficulty penetrating this space. As a ru,le, mount detectors no closer than 6” from any wal I. Diagram 3: DEAD AIR SPACE

On smooth ceilings, in larger rooms. or open areas, locate detectors no farther than 30 feet apart.

0 1 8 I .@ ? I ‘I .

m--m $-T+--- I

i I

0 I.m’I @

On smooth ceilings in smaller, rectangular rooms or in hallways, detectors may be spaced up to 41 feet apart so long as every part of the area is within 21 feet of a detector. As a rule, however, keep spacing at 35 feet between, detectors to insure fast detection of incipient fires.

Diagram 5: SPACING-SMOOTH CEILING IN SMALLER ROOMS

Diagram 6: SpACIffi-SMOOTH CEIL= IN HALLWAYS

On uneven ceilings or ceilings crossed by beams or open wood joists, closer spacing will be required. In al I in- stallations involving cross beams or joists, detectors should be mounted on the bottom of the beam or joist, not in the channels in between.

Cathedral and other types of sloped ceilin:Js may present special problems. Air at the top of sloped ceilings has a higher temperature than air in other parts of a room. This temperature difference may create a “therma I barrier” which can prevent rising combustion pro- .ducts from ever reaching the top of the ceiling. Detectors may have to be lo- cated below the point where rising com- bustion products will level off. A pre- installation smoke test will help deter- mine if a Vherma I barrier” exists.

Diagram 7: $ALfE&pJT ON UNEVEN

TECTOR HERE

.L-.;--. ;-.&..A-- ._._ :..df

Diagram 8: SLOPED CEILINGS

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Return I Air I

Locate detectors ducts. Products be drawn to them quickly.

near return air of combustion will and detected

Air Conditioning

Diagram 9: RETURN AIR DUCTS

Where .Not TO Place DeteCtofs (Tips for the Non-EqxHenced Installer):

Products of,combustion detectors require skill and experience to install pro- perly and successfully. A relatively inexperienced installer should avoid placing detectors:

In dusty or dirty environments. Dust and dirt can accumuIate,in the No. 627D’s detection chamber

. . . ..‘, . . . . .* . . .- ‘_

:. ;:; _ - . . .-

Diagram 10: AVOID DUST

0 and make it overly sensitive.

Near heatinq and air condition- ing ducts, fans or open windows which produce air currents which can drive products of combustion away and alter the ion current within the No. 6270’s detection chamber.

In damp or excessively humid areas. Tiny w&ter droplets can accumulate in the No. 6270’s detection chamber and make it

4D overly sensitive.

Air Conditioning Diffuser

Diagram 11:AlR CURRENTS PREVENTING DETECTW

b - e b

’ b b

b b

b b b

bJ.& $6 4 d -

-ram 12: AVOID HUMID ENVJRONMENTS

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Near areas where combustion products are normally present like kitchens, garages, welding shops, ovens, burners, etc.

Diagram 13: AVOID KITCHiNS, GARAGES, ETC.

Outdoors, in stables, open storage sheds, or other open structures typically affected by dust, air currents or humidity.

Zoning, Detectors: -ram 14: AVOID STABLES, SHEDS, ETC.

Pi \ :

The faster the source of an alarm can be pinpointed, the faster action can be taken.. While no formal rules exist in regard to zoning, it is always sensible to zone a system of any size. Experienced installers:

I. Establish at least one zone on every floor protected.

2. Zone natural subdivrsions of a building such as separate wings on a single floor.

3. Minimize the number of detectors on each zone. Though as many as 20 No. 6270 detectors can be put on a single zone, putting no more than 10 on a zone may be a good idea for an inexperienced installer.

Mounting Detectors

No. 627D Detectors are designed for direct ceiling mounting or mounti,ng to l-1/2” deep, 4” square commercial outlet boxes. These boxes and other mount- ing hardware are not furnished due to varied applications of the installations typical in fire prevention work.

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Regard less of what hardware is used, detectors must be completely insulated from. ground. To assure that no grounding occurs, use the two special nylon mounting screws supplied, or other simiI.ar non-conductive connectors, with all metal-base detectors. Do not, under any circumstances, remove the insulation from the back of the detector base. This insulation guards against 6 detector ground. Detect- ors with plastic bases are completely insulated against grounds and require no special mounting screws of any kind.

Detector Wiring: All wiring should be made in accordance with rules laid down in local codes having jurisdiction. In the absence of such local codes, the wiring methods for such systems set down in the National Electrical Code should be fol lowed.

Two U.L. Listed solid wires should be used to interconnect detectors. The con- ductors should be coded or differentiated in some way. Coded wire will greatly reduce the possibility of improper wiring and of wasted hours in set-up time.

Proper gauge wire should be used. (See Article 760 of the National Electrical Code.) The following table will serve as a guide for wire selection:

Wire Size (AWG) Maximum Distance Each Loop (Control Panel to end of line module)

I8 3900 ft. 16 6000 ft. or 75 ohms max. per zone, I4 9500 ft. whichever resistance is less.

To Wire A Detector Loop (See Diagrams 15 &16): No. 627 No. 627

To Terminals la+) and 17t-l of No.625; Terminals 914 and 10(-I of No. 628.

Diagram 15: DETECTOR LOOP WlRlNG No. 629

I. Install the No. 629 End-of-Line Module at the planned end of the.detector loop. Temporarily splice together the wire leads which go to terminals I and 2 of the end-of-line module. Do not connect them to the module.

2. Working toward the No. 625 Master Control, install No. 627D Detectors in series parallel fashion like thermostats . Connections for each detector are made to the terminal strip located on the detector’s printed circuit board . Wires should be brought through the hole in the base of the detector and connected to the proper terminal strip screw (see Diagram 15). Do not make connections to the control or zone module yet.

NOTE : If outlet boxes are employed for mounting purposes and conduit is not .being used, porcelain or phenolic insulating bushings should be inserted

in all box knock outs used.

3. When all detectors and other devices are installed (see below for proper connection of other devices), check loop resistance. Resistance should not exceed 75 ohms with meter (+I lead connected to the (-),leg of the detector loop and the (-1 lead connected to the (+I leg of the detector IOOp.

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4. Now check the detector loop for grounds by attaching the (-1 meter lead to ground (water pipe or conduit) and the (+I meter lead to either leg of the detector loop. Resistance should be in excess of IOOK ohms.

5. Connect the wires temporarily spliced together to the’end-of--1-ine mod- ule.

6. Connect the detector loop to terminals I7 (-1 and I8 (+I of the No. 625 control or to terminals 9 (+I and IO (-1 of the No. 628 Zone Module.

NOTE: Detectors Should Never Be Wired In Branched Parallel As Shown Below

I I No27 No27 NoE7

No. 625

Diagram 16: IMPROPER PARALLEL WIRING No- 627 PARALLEL WIRING No- 627 Na 627 Na 627 No. 627 No. 627

No. 625 MASTER CONTROL: Mounting The No. 625:

Keys to the panel are to be found in an envelope taped to the cabinet door. Open the cabinet and carefully remove the package with the two No. 8066 test diodes. Remove the chassis (6 screws) to expose the four mounting holes in the cabinet back. Inspect internal components for shipping damage.

The cabinet is to be mounted on screws through the four holes in the cabinet back. Conduit connections may be brought in through any of the several knock outs provided. Remember to provide clear space for the two No. 630 Rechargeable Batteries which provide standby power for the No. 625 Control. Replace the chassis after mounting the cabinet.

Wiring The No. 625 (See Diagrams 178r 18): I. Prewire the detector loop following the instructions above. DO NOT

MAKE CONNECTIONS TO THE CONTROL YET.

2. Prewire the alarm bel I loop. Be sure that a No. 629 End-of-Line Module is at the end of the loop. Be sure that bell connections are polarized (using No. 8066 diodes) and connected properly. DO NOT MAKE CONNECTIONS TO THE NO. 625 CONTROL YET.

3. Connect the two No. 630 Rechargeable Batteries to the two battery screws. (See Diagram 17). Verify with a voltmeter that terminal potential approxi- mates 24 volts. The TROUBLE lamp and buzzer should now be energized. Silence the buzzer by turning the TROUBLE switch to SILENCE,

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f-3 : :

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4. Make 120 V.A.C. connections to terminals 9 and IO of the No. 625 using 14 AWG wire as shown in diagram 17. The TROUBLE lamp should increase in brightness slightly and the POWER and ZONE lamps should be energized. The CHARGE lamp should indicate that the batteries are being charged. Verify that the buzzer is still energized by turning the TROUBLE switch from SILENCE to NORM. Then return switch to SILENCE position.

bELL USE

0 AumM LAMP (No. 636)

Ademco 625 Local Fire Control

FOR AUTOMATIC AND MANUAi ALARM SYSTEM SIGNALING. NOKCODED. 12DV.A.C.. Wlit.. 1SAMP. COMPLIES WITH NFPA STANDARD NO. 72A AND UL 864, 5th EDITION. Y*

l- Main Suppl Circuit (SUPERVISED)

- 120 UA.C..6~Hz..lSAmp.

5. Connect one No. 8066 test diode to the detector loop terminals of the No. 625 (see Diagram 18). The ZONE lamp should go out, but the TROUBLE lamp shou-Id stay on. Short across the diode leads with a clip lead. The ALARM and ZONE lamps should be energized. Remove the clip lead. Momentarily operate the RESET switch. The ALARM and ZONE lamps should now be out. Leave the -test diode on the detector loop.

**FROM ABOVE D’IAGRAM: Cal ifornia Fire Marshal I Approved, No. 7165-078-11

BELL ClRCUlT TEST DETECTOR ClRCUlT Diagram 18: TEST PROCEDURE TEST

6. Connect the second No. 8066 test diode to the alarm bell terminals of the No. 625 (see Diagram 18). Verify that the trouble buzzer is no longer energized by returning the TROUBLE switch to NORM position. (Troub I e lamp should go out.) Only POWER and possibly CHARGE lamps should be energized. Leave the test diode on the bell loop.

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7. Remove the POWER fuse. Verify that the TROUBLE lamp and buzzer are energized. Replace the fuse. (Note: If the No. 630 Rechargeable Batteries are not used, removal of the POWER fuse will cause the entire system to be de-energized. Remove the ALARM BELLS fuse. Verify that the TROUBLE lamp and buzzer are energized. Replace the fuse.

8. Disconnect the rechargeable batteries and 120 V.A.C. power. Remove the test diodes from terminals 7 and 8 and I7 and 18. Connect the prewired detector loop and alarm bell loop as shown in diagram 17. Be sure to observe polarity! Reconnect the batteries and I20 V.A.C. power. Verify that only the POWER and possibly CHARGE lamps are energized. The system is now ready for local test.

No. 626 ZONE MODULE CABINET: The No. 626 should be located within three feet of the No. 625. All wiring be- tween the No. 626 and No. 625 should be in rigid conduit.

No. 628 ZONE MODULE: Control Unit Accessory Circuit. To Corres onding Numbered Terminals On No 6 5 Master Control Or Additional _’ j No. 628 Zone Module.

No. 636 REMOTE ZONE LAMP

28 V. 0.04 A

12345670 Ademco 628 Zone Module ’

0 ZONE LAMP

il (DURING TEST ONLY \ I. I

TO BE INSTALLED IN ACCORDANCE WITH NFPA 72A (COMPLIES WITH UL 864, 5th EDITION). 1 1 ‘\ 9 lo,‘11 12 13 14 15 16,

BALLAST 1 !‘. : -;‘! LAMP

,TCHING JUMPERS/ NOT DISCONNECT)

‘AC TS AUXILIARY ALARM CON’I 5 AMP RESISTIVE 28 VDC OR 120 VAC

No. 627 ION DETECTORS

+ 1 I- 1 -N.O.) (NOT SUPERVISED)

INITIATING DEVICE CIRCUIT 24 VDC, 0.1 AMP, SUPERVISED

aN.0. THERMOSTATS OR 20 MAX. No. 629 MANUAL PULL STATION PER ZONE END-OF-LINE (10 A, 120 VAC, 28 VDC) MODULE

Diagram 19: WIRING THE No. 628

Wiring The No. 628tSee Diagram 19):

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I.

2.

3.

4.

5.

6.

7.

Disconnect the 120 V.A.,C. and rechargeable batteries feeding the No. 625 Control.

Mount the No. 628 Zone Modules inside the No. 626 Zone Cabinet.

Run a six-wire cable in conduit from terminals I through 6 of the NO. 625 Control to like numbered terminals of the No. 628 Zone Module (I to I, 2 to 2, etc.).

Connect a No. 8066 test diode to terminals 9 and IO of the No. 628. (See Diagram 19). Reconnect battery and 120 V.A.C. power. Verify that only POWER and possibly CHARGE lamps are energized at the control panel.

With a clip lead, short across the diode leads at the zone module. Verify that ALARM and ZONE lamps on the control panel and zone module respectively are energized. Disconnect the clip lead and diode.

Disconnect the battery and 120 V.A.C. power to the control panel. Connect detector lines to terminals 9 and IO of the zone module as shown in diagram 19. Observe polarity! Reconnect the battery and 120 V.A.C. power. Verify that only POWER and possibly CHARGE lamps are energized. The system is now ready for local test.

Additional Zone Modules: Zones 3, 4 and 5 may be added to the system by first repeating steps I and 2 above, then by making jumper connec- tions between terminals I through 6 of the preceding zone module and like numbered terminals of the new zone module. Once connections are made steps 4, 5 and 6 are repeated.

AUXILIARY DEVICES: Thermostats and Pull Stations such as the Ademco No. 529 can be added to the detector loop (initiating device circuit). They should be wired in series parallel fashion as i,ndicated in diagram 20.

To Terminals 18(+) (+I and 17 (-1 of No. 625; To Terminals 9 (+I and 10(-l of No. 628 4

t-1 No. 629

Diagram 20: ADDING AUXILIARY DEVICES END-OF-LINE MODULE

AUXILIARY CONTACTS: For operation of auxiliary fire protection devices, additional contacts are pro- vided on both the No. 625 Master Control and No. 628 Zone Module. These contacts can be used for releasing door holders, shutting down fans, and activating or deactivating.other devices.

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ADDITiONAL NOTES ON THE FIRE EARLY WARNING SYSTEM

I.

2.

3.

4.

5.

.

6.

The dry contacts in the No.625 master control only will activate with a zone I alarm. Each additional zone used (up to 4 No.628 modules) has its own independent set of dry contacts.

To obtain a single dry contact closure when any zone goes into alarm, simply para- llel the dry contacts in the No.625 (terminals 14, I5 and 16) with these in the associated No.628 zone modules (terminals II, 12, and 13).

Each detector in the system can be tested by removing the latching jumpers between terminals I3 and I7 and between terminals I8 and T3 (No.6251 and between terminals 9 and I5 and between terminals IO and 14 (for each No.628). Removal of these jumpers prevents the system from latching and will not cause the alarm.to sound beyond the actual test procedure. Thus, it will not require resetting from the panel. Be sure to reinstall the latching jumpers when testing is done.

The TROUBLE lamp in the No.625 will light if zone I or any attached zone has a problem.

A lit ballast lamp on any No.628 Zone module (visible only when panel is opened) indicates an internal short circuit in that module. If a trouble indication or false alarm condition exists on any No.628 Zone, first check each zone module’s ballast lamp in the No.626 cabinet. If lit, return module to ADEMCO for repair.

tector or bell circuit wiring. If not, the fault lies in the external de

THIS FIRE EARLY WARNING SYSTEM is water f used in the system and the alarm will not fire are removed, suspect a water flow SW switch to free up a stuck valve.

low approved. If water flow switches are reset even though all signs of smoke and

itch which did not reset. Ta,p each

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OPERATING INSTRUCTIONS FOR FIRE EARLY WARNING SYSTEM (Model No. 825 Control and No. 626 Zone Module Cabinet)

I. Normal Standby Condition: Only Power Indicator should be “on”. Charge Indicator should not be “on ” for longer than 72 hours after batteries are replaced or power outage has occurred. If so, replace batteries.

2. Alarm Condition: Alarm indicator and appropriate Zone Indicator will be “on” .

3. Alarm Reset: Alarm condition can be reset if Reset Switch inside 625 is pressed after alarm source has been determined and corrected.

4. Alarm Si Iencing: Removi’ng Alarm Bell Fuse will silence alarm. Alarm Indicator wi I I remain “on” unti I reset as in #3 above. Move Trouble Switch

‘to SILENCE to quiet Trouble Buzzer.

5. Trouble Condition: Trouble Indicator will turn “on” and Trouble Buzzer will sound if open occurs ‘in Indicating Device (Bell) Circuit or Initi- ating Device (Detector) Circuit or if Main Power is interrupted. Inter- nal Trouble Buzzer can be silenced by pressing Trouble Switch on 625 P.C. Board. Return Trouble Switch to NORMAL position when trouble condition is eliminated.

6. Switches: NORMAL position of Trouble Switch is marked on P.C. Board. Reset Switch is spring returned.

-0 7. Fuses : These are types requ i red: Power: 3AG-3A

Bel Is: 3AG-5A Batteries: 3AG-5A

8. Periodic Testing Recommendations:

A. Initiating Device Circuits: Remove Alarm Bell Fuse. Trouble Indicator should CJO “on” and Trouble Buzzer should sound. Move Trouble Switch to SILENCE position. Trouble Indicator should remain “on”. Now mo- mentari1y”shor-t out Detector Loop of 625 (terminals I7 & 18). Alarm Indicator and Zone Indicator should go “on”. With short removed, press Reset Switch on board and both of these indicators should go “Off”. ( Repeat above for each zone in 626 Zone Cabinet (if used) (short terminals 9 8 IO in turn on each zone module). Now replace Alarm Bell Fuse and return Trouble Switch to NORMAL position.

B. Indicating Device Circuit: Short out Detector Loop in 625 (terminals I7 8 18) and Alarm Be!ls should sound. Remove short and press Reset Switch to silence alarm. Repeat test with mai n power switched off and operati ng from batteries.

C. Batteries : Replace batteries after 4 years or if Charge Indicator re- mains “on” longer than 72 hours after replacing batteries or after power outage has occurred.

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