Another mixed-use sprinkler monitoring system, this time with a side of burglary, for a bakery(F-2)/coffeeshop(A-2)/8 apartments(R-2) mixed-use building (complete with elevator). This system also provides panic/holdup alarms, fuel gas and CO detection, and suppression monitoring for the hood system.
Panel
The panel in question is a B8512G, fitted with a B444-V2 cellular communicator and a B208 input expander and mounted in the bakery’s office. Annunciation is supplied by a B920 keypad in the coffeeshop and a B921C keypad in the bakery floor area; the keypad in the coffeeshop has a B208 input card mounted behind it in a B56 backbox.
Sufficient backup battery is provided for 24h of whole-system operation followed by 15 minutes of alarm; this consists of a single 18Ah, 12V battery. This is well in excess of the requirements for central station burglary alarms, but the 24h standby time is required due to the sprinkler monitor, elevator recall, and supervisory functions this panel performs.
Initiation
As an aside, the door contacts are GRI Magnesphere units (these provide a high level of protection against bypass for relatively little incremental expense over a standard reed), and the deadbolt monitoring is accomplished using SDC MS-18 mortise strikes.
Building Life Safety
The panel zones are fitted out as follows:
- Zone 1 is connected to 4WTR-Bs in each lobby (basement, first floor, second floor) for elevator recall
- Zone 2 is connected to a 4WTR-B in the machine room or machine space for the elevator “flashing hat”
- Zone 3 is connected to the sprinkler waterflow switch
- Zone 4 is connected to the sprinkler supervisory switches
- Zone 5 supervises the various UL300 hood systems in the bakery (there is at least one and perhaps more)
- Zone 6 is connected to the door and deadbolt (strike) monitoring switches for the communicating door between the coffeeshop and the bakery and set as a perimeter delay zone in one of the partitions, while being repeated as a “virtual” output to an otherwise-unused zone number in the other partition to allow it to be in both partitions at once
- and Zones 7 and 8 are connected via a 3-wire cable to an AGS Mini Merlin CH4CO gas/CO detector that is mounted over the main door to the kitchen, powered from 120V exhaust fan power, and wired as follows:
- A PAM-1 relay is used to provide AC trouble monitoring with its NO contact in the common line,
- the switched common goes to both EOL resistors and the contact common on the Mini Merlin’s CO-only contact,
- the CO zone goes to the CO contact’s NO terminal on the Mini Merlin and its associated EOL,
- the gas zone goes to the combination (CO and gas) contact’s NO terminal on the Mini Merlin and its associated EOL,
- the combination contact’s common is connected to the CO contact’s NC terminal,
- and the 120V output from the Mini Merlin controls a gas valve in-line with the kitchen space gas supply line to shut the gas supply off in case a leak or CO condition is detected
This setup deliberately cuts the zone common ahead of the contacts on power failures due to the Mini Merlin’s alarm contacts being in the alarm state when unpowered. It also disambiguates CO alarms from gas alarms; due to the Mini Merlin’s inflexible design, a common infelicity on low-end commercial CO/NG sensors/alarms, it’s not possible to program its relays to function differently, nor is it possible to get a true trouble output from it to indicate EOL conditions back to the panel. (This is a problem with all of them: the Senva units can only be set with both contacts as NO or both as NC, and don’t document an analog trouble output, and while the Macurco units provide the most programming flexibility, Macurco doesn’t make a CO/NG combination detector.)
Bakery Intrusion
The expander zones at the panel, then, receive the burglary zones from the bakery space, set up to provide Extent 4 protection to the bakery and motion-based Extent 3 protection to the office within, along with Extent Partial protection for a safe in the office:
- Zone 1 is a perimeter delay zone connected to the door and deadbolt switches for the main (back) entrance door
- Zone 2 is a perimeter zone connected to the door and deadbolt switches for the restroom hall door
- Zone 3 is a perimeter zone connected to a FG1625F glassbreak detector mounted on the north wall of the cake decorating room
- Zone 4 is a perimeter zone connected to both door switches for the manually operated roll-up dock door in the back of the bakery space (near its main entrance)
- Zone 5 is an interior zone connected to the door and deadbolt monitor switches for the office door
- Zone 6 is an interior zone connected to the door switch for the decorating room door
- Zone 7 is an interior zone connected to a CDL2-A12G motion detector in the southwest corner of the office with its microwave sensitivity turned down to near the minimum to minimize potential false alarms
- and Zone 8 is an interior zone connected to a double-EOL tampered high-security contact on the office safe
The keypad, in turn, has one of its zones connected to GR3045CT panic switches adjacent to all doors in the walk-ins, and another zone connected to supervisory temperature switches within the walk-ins to monitor them for a failure condition.
Coffeeshop Intrusion
The input expander serving the coffeeshop space has the following sensors connected to it to provide Extent 3 protection to the main coffeeshop space:
- Zone 1 is a perimeter delay zone that has the door switches and monitoring strikes for both main entrance doors to the coffeeshop space on it
- Zone 2 is a perimeter zone that provides protection for the storefront glazing using 3 ceiling-mounted FG1025Z directional glassbreaks set for maximum sensitivity
- Zone 3 is a perimeter zone that has the door and latchbolt monitor switches for the restroom corridor exit door on it
- Zone 4 is an interior follower zone with 3 CDL2-A12G dual tech motion detectors on it, mounted to the west wall and northwest exterior corner within the coffeeshop space
- Zone 5 is a 24hour panic zone with a Potter HUB-T or equivalent double-action holdup button on it for panic/holdup protection
- and Zone 6 is an interior follower zone for the storeroom door.
The coffeeshop also has a dome IP camera in the back corner of the main space, set up to have a good view of the cashier’s station and recording to a local SD card.
Residential Security
The residential security system consists of a 4G/LTE intercom (a 2N LTE Vario would work, but others can be used as well), mounted in the inner vestibule, with a remote security relay mounted on the inside of the building providing power to the ELR on the inner vestibule panic. One of the inputs is connected to a door switch on the inner vestibule door and to a FG1625F glassbreak mounted to the vestibule ceiling to provide a local alarm if the door is forced or the vestibule glazing is attacked, while the other input is connected to a REX switch in the panic hardware.
Notification
Intrusion notification is supplied by ceiling-mounted ELK-74 Echo sirens, with one siren for each partition. They are centrally located in the main area of the coffeeshop and the main kitchen area of the bakery, and connected to the A and B outputs of the B8512G respectively, with output C used for resettable power throughout the system.
Life Safety
In-Apartment
The apartments have ordinary (non-interconnected) apartment entrance deadbolts on their main doors and a full suite of local smoke, CO, and natural gas alarms within them.
Exit Hardware
The corridors, bakery, and coffeeshop spaces are all fitted out with PLT 50290 exit sign/emergency light combination fixtures as-needed. In addition, there is a PLT 50311 in the center of the apartment corridor to supply additional emergency lighting, and a matching fixture along the front wall of the coffeeshop to supplement the emergency lights on the exit sign at the back, to go with matching emergency lights in the stairwells.
There is also a communicating door between the coffeeshop storeroom and the bakery; this door is fitted out as a double-acting door with a Jackson 20-330 or equivalent closer and a Rockwood 590 roller latch into a 590DA strike for door control, along with a standard double-cylinder (F16) deadbolt into a deadbolt monitoring strike for security. (This door cannot be a means of egress from the coffeeshop due to the fact it goes into a kitchen, which is not a valid egress route according to IBC 1016.2 point 5.)
Residential
The rear exit stair from the residential space is intended to serve only as an emergency exit, so it has a storeroom (F08) function lock on the door from the corridor to it. The front stair, though, simply has a passage function latchset on its door from the corridor; any further access control here would require also access controlling the elevator, which’d add significant complexity to a very small-scale building.
Common Space
The vestibule doors consist of a push-pull outer door with a closer and a Rockwood 590 roller latch to provide positive door control, along with an inner door set up with a nightlatch/storeroom (03) function Electric Latch Retraction panic device, using a SDC IP100FRK on a Falcon 25-R-NL rim panic, less dogging, with a Command Access CDL power transfer and a factory or retrofit REX switch. While costlier than standard hardware and a strike, this choice of hardware provides low-power operation while ensuring that egress code is still met and also resists common forced entry attacks better than an electric strike can as the latchbolt on the rim panic is less accessible to attackers.
The exit doors from the restroom corridor use panic hardware as well, but this can be done using another Falcon 25-R-NL, less dogging, for the exit to the outside and a medium or light-duty exit-only (01 trim) fire exit device for the exit from the restroom corridor to the residential lobby. The restroom doors, themselves, though, use simple classroom function deadbolts (F29 in the ANSI scheme) and pull handles, as each restroom provides two stalls.
Finally, a storeroom (F08) function lock is used on the door leading to the front stairs down to the building’s basement.
Coffeeshop
The coffeeshop has a double-cylinder indicating deadbolt (F16) along with push-pull hardware on its main door and a cylinder dogged dummy (02) trim panic on its auxiliary exterior entrance. The rear exit to the restroom corridor, though, is another storeroom/nightlatch (03) trim panic (another Falcon 25-R-NL would do the job, although this one needs to be ordered with cylinder dogging); while I’d rather use something that provides the lockout-proofing of the ANSI F13 corridor mortise function for this, there just isn’t panic trim available that automatically unlocks on egress in that fashion. (This is an issue for mobility-impaired folks as the only accessible routes out of the corridor go back through the coffeeshop and the bakery due to elevation changes within the building.)
The door to the coffeeshop storeroom is a pivot-hung double-acting door with an overhead concealed closer (Jackson 20-330 or equivalent) and a Rockwood 590 roller latch on a Rockwood 590DA strike. This provides self-closing double-acting operation along with positive control of the door at a relatively low cost.
Bakery
The bakery office uses a standard corridor (F13) deadbolt function (to avoid accidental lockouts). The cake decorating room door, though, is a double-acting door similar to the coffeeshop storeroom door; we use this instead of a conventional impact door to provide better door control and security, as impact doors are essentially impossible to secure without the use of canebolts, and provide no positive control over door location, which is a problem for intrusion detection.
The back exit from the bakery to the restroom corridor and the main bakery entrance door near the back of the building are also both F13 corridor deadbolts to provide protection against inadvertent lockouts.