Technical Documentation "Installation, Mounting and Operating Instructions" BAK-250 Fire protection unit PERFORMANCE DATA • General building supervisory approval (abZ) Z-41.3-542 • For installation in fire-resistant suspended ceilings (F90-A) • For use or connection of a smoke trigger device with abZ (e.g. SCHAKO smoke detection system RMS) in combination with a suitable actuator unit (e.g. spring return actuator) SPECIAL FEATURES • Classification K90-U • Test specifications - DIN 4102-2 - DIN 4102-6 • The fire protection unit is fitted with two thermal trigger devices (72°C; located on the inside and outside). In case of fire, the triggering and closing motion of the shut-off damper happen independently of whether the temperature occurs first inside the ventilation ducts or outside. • Fastening of the air diffuser to the fire protection unit with screw mounting (-SM) SCHAKO | Ferdinand Schad KG SteigstraRe 25-27 D-78600 Kolbingen

Fire protection unit BAK-250 Technical documentation Table of contents Construction subject to change No return possible

Fire protection unit BAK-250 Technical documentation Description VENTILATION FITTINGS Openings for ventilation ducts in fire-resistant suspended ceilings must be sealed against fire and smoke by means of shutoff devices. The shut-off device type BAK-250 (hereafter referred to as fire protection unit type BAK-250), of resistance class K90-U, according to general building approval (abZ) No. Z-41.3-542 is suitable for installation in fire-resistant suspended ceilings. This ceiling must be designed as panelled ceiling in screw-type and spatulated design and must meet the requirements of an independent...

Fire protection unit BAK-250 Technical documentation Description CONNECTION OF VENTILATION DUCTS The fire protection unit type BAK-250 must only be connected to non-flammable ventilation ducts. The local regulations or national standards on ventilation systems (in Germany e.g. M-LüAR, in the locally applicable version) apply. No inadmissible forces may affect the fire protection unit and suspended ceiling especially in case of fire and impair their fire resistance time. The required expansion joints (flexible spigots) must be designed as flammable, elastic spigots made of at least standard inflammable...

Fire protection unit BAK-250 Technical documentation Models and dimensions MODELS AND DIMENSIONS Dimensions 1 Housing 2 Shut-off damper 3 Snap-in locking device consisting of 3.1 Locking bolt 3.2 Locking profile 4 Shut-off damper housing 5 Trigger device 6 Suspension lug 7 Drive (optional) 8 Fusible link cover Nominal size * It is also possible to select a smaller spigot diameter 0D 1) External dimensions Table 1: Available sizes Trigger device As standard, the fire protection unit is supplied with an inside and outside trigger device (fusible link with 72°C trigger temperature)! Thus, in case...

Fire protection unit BAK-250 Technical documentation Installation details INSTALLATION DETAILSInstallation The fire protection unit type BAK-250 is connected to the solid ceiling (F90) via four suspensions. Then the suspended ceiling (panelled ceiling in screw-type and spatulated design) is mounted. Afterwards, the air diffuser is fastened to the connection frame of the fire protection unit via screw mounting (-SM). The tension rod dimensions are calculated based on the loads of their own weight, of the connected ducts and of the air diffuser. Table 2: Weight of BAK-250 and tension rod dimensioning...

Fire protection unit BAK-250 Technical documentation Accessories ACCESSORIES Available at an extra charge   Limit switch type ES-1A (-ESA) Electric spring return actuator - BFG24-TN-ST SO (-B98; 24 V AC/DC) - BFG230-TN SO (-B99; 230 V AC) Limit switch type ES-1A (-ESA) Electric limit switch for position indication. Switching element including one NC and one NO contact each, 4 connections for M3,5 screw terminals for max. 2 mm². 250 V AC, Ie 6A, IP67 using suitable cable glands M20 (on-site). Figure 8: Circuit diagram of limit switch type ES-1A (-ESA) BAK-250 with electric spring return actuator...

Fire protection unit BAK-250 Technical documentation Accessories The BDQJ diffusers are models especially designed for fire protection units. Theses diffusers can only be used with the corresponding fire protection units. Their ventilation features are identical to those of the standard air diffusers DQJ-... (see separate technical documentation of ceiling swirl diffuser DQJ). Air throw pattern "A" : All blades in position 2 (standard for NG310). "B" : Blades in position 1+2, preset ex works (not possible for NG310). "C" : Without blades (for return air only; standard) "V" : All blades in position...

Fire protection unit BAK-250 Technical documentation Order code ORDER CODEBAK-250 ORDER CODE 01 EXAMPLE BAK250-44-400-158-72-HAN-ESA Type BAK250 = fire protection unit BAK-250 | Air diffuser 44 = BDQJ | Nominal size = 400 mm | Spigot diameter = 158 mm | Trigger temperature 72 = 72°C | Actuator type HAN = thermo-mechanical triggering | Accessory ESA = ES-1A (limit switch in OPEN position) ORDER DETAILS 01 - TYPE BAK250 = fire protection unit BKA-250 02 - AIR DIFFUSER (must be ordered separately) 06 = ceiling diffuser 4DE-... 07 = ceiling diffuser 4DF-... 17 = ceiling diffuser DQDL-... 44 = ceiling...

Fire protection unit BAK-250 Technical documentation Order code BDQJ ORDER CODE 01 EXAMPLE BDQJ-Q-SR-Z-500-SB-9010-000-PT-A9010-A-SM-A0 Type BDQJ = ceiling swirl diffuser for fire protection unit| Q = version with square faceplate | SR = circular blade pattern | Z = air throw supply air | Nominal size = 500 mm | SB = faceplate made of sheet steel | 9010 = face plate painted to RAL9010 | Drill pattern 000 = not reduced | Blades PT = divided blades | Blade colour A9010 = aluminium similar to RAL 9010 white | Air throw pattern A = all blades in position 2 | Mounting SM = screw mounting | Cover A0...