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Model LT56 Series Special Sprinklers

Designed specifically for corridors and hallways

K5.6 (80 Metric)

cULus Listed

Bulletin 058 Rev. B November 2016

Model LT56C

Models LT56 & LT56-300

Models LT56L & LT56L-300

Product Features

•  

28 ft x 10 ft (8.5 m x 3 m) max. coverage area

•  

cULus Listed for Light Hazard occupancies

•  

Increased spacing and reduced water demand 

    in corridors compared with traditional extended 
    coverage sprinklers

Product Description

Model LT56 series sprinklers are cULus Listed Specific Ap-
plication sprinklers designed for installation in accordance 
with NFPA 13. The sprinklers produce a spray pattern that is 
specifically designed to cover long narrow spaces, such as 
corridors and hallways, with fewer sprinklers and less wa-
ter demand compared with traditional extended coverage 
sprinklers.

Model LT56 series sprinklers are quick-response sprinklers 
for use in Light Hazard occupancies only. Model LT56 and 
Model LT56-300 sprinklers have a glass bulb operating ele-
ment. Model LT56L, LT56L-300, and LT56C sprinklers have 
a fusible link operating element. Model LT56, LT56-300, 
LT56L, and LT56L-300 sprinklers are available with Model 
FV recessed escutcheons, Model FP recessed escutch-
eons, or Model CCP concealed cover plates. Model LT56C 
sprinklers require a Model G4 flat concealed cover plate.

Sprinkler Model

Operating 

Element

Max. Working 

Pressure 

psi (bar)

Styles

Coverage 

Areas

Sprinkler 

Identification 

Number (SIN)

LT56

Glass Bulb

250 (17.2)

Pendent, Recessed Pendent or 

Conical Concealed Pendent

Table B

RA5814

LT56L

Fusible Link

250 (17.2)

Table C

R5814

LT56-300

Glass Bulb

300 (21)

Table D

RA5914

LT56L-300

Fusible Link

300 (21)

Table E

R5914

LT56C

Fusible Link

175 (12)

Flat Concealed 

Table F

RA5994

Table A

www.reliablesprinkler.com

Model LT56C Sprinkler with Model G4 Flat Cover Plate

Model FV Escutheon

Model FV Escutheon

Model FP Escutheon

Model FP Escutheon

Model CCP Cover Plate

Summary of Contents for LT56 Series

Page 1: ...esponse sprinklers for use in Light Hazard occupancies only Model LT56 and Model LT56 300 sprinklers have a glass bulb operating ele ment Model LT56L LT56L 300 and LT56C sprinklers have a fusible link operating element Model LT56 LT56 300 LT56L and LT56L 300 sprinklers are available with Model FV recessed escutcheons Model FP recessed escutch eons or Model CCP concealed cover plates Model LT56C sp...

Page 2: ...ensitivity Quick response Temperature Ratings 155 F 68 C 200 F 93 C Recessed Escutcheons Cover Plates Model FV recessed escutcheon Model FP recessed escutcheon Model CCP cover plate Sprinkler Wrenches Model D pendent Model GFR2 recessed and concealed Listings and Approvals cULus Listed Model LT56 Sprinkler Components and Dimensions Figure 1 Model LT56 Sprinkler Hydraulic Design Criteria Table B Mi...

Page 3: ...H Sensitivity Quick response Temperature Ratings 165 F 74 C 212 F 100 C Recessed Escutcheons Cover Plates Model FV recessed escutcheon Model FP recessed escutcheon Model CCP cover plate Sprinkler Wrenches Model D pendent Model GFR2 recessed and concealed Listings and Approvals cULus Listed Model LT56L Sprinkler Components and Dimensions Figure 2 Model LT56L Sprinkler Hydraulic Design Criteria Tabl...

Page 4: ...d Escutcheons Cover Plates Model FV recessed escutcheon Model FP recessed escutcheon Model CCP cover plate Sprinkler Wrenches Model D pendent Model GFR2 recessed and concealed Listings and Approvals cULus Listed Model LT56 300 Sprinkler Components and Dimensions Figure 3 Model LT56 300 Sprinkler Hydraulic Design Criteria Table D Minimum Flow and Residual Pressure Max Coverage Area ft x ft m x m Fl...

Page 5: ...essed Escutcheons Cover Plates Model FV recessed escutcheon Model FP recessed escutcheon Model CCP cover plate Sprinkler Wrenches Model D pendent Model GFR2 recessed and concealed Listings and Approvals cULus Listed Model LT56L 300 Sprinkler Components and Dimensions Figure 4 Model LT56L 300 Sprinkler Hydraulic Design Criteria Table E Minimum Flow and Residual Pressure Max Coverage Area ft x ft m ...

Page 6: ...kler Finishes See Table H Sensitivity Quick response Temperature Ratings 165 F 74 C 212 F 100 C Cover Plate Model G4 Sprinkler Wrench Model FC Listings and Approvals cULus Listed Model LT56C Sprinkler Components and Dimensions Figure 5 Model LT56C Sprinkler Hydraulic Design Criteria Table F Minimum Flow and Residual Pressure Max Coverage Area ft x ft m x m Flow gpm l min Pressure psi bar 28 x 8 8 ...

Page 7: ...65 3 4 19 2 1 4 57 1 1 2 38 1 25 1 4 6 165 F 3 74 C Table G Recessed Escutcheon and Conical Concealed Cover Plate Dimensions Notes 1 Face of fitting to ceiling dimensions are based on nominal thread make up Verify dimensions based on fitting and thread sealing method prior to installation 2 For use with 155 F 68 C and 165 F 74 C temperature rated sprinklers where the Maximum Ceiling Temperature do...

Page 8: ... plate is the only concealed cover plate permitted for use with the Model LT56C sprinkler Use of any other recessed escutcheon or cover plate will void all approvals and warranties Do not install Model FV and FP escutcheons or Model CCP and G4 cover plates in ceilings that are positively pressurized with respect to the occupied space below When installing Model LT56 LT56L LT56 300 and LT56L 300 sp...

Page 9: ...Coverage Area Figure 7 Adjacent Sprinklers Figure 8 Example Sprinkler Layout Figure 9 Bulletin 058 Rev B November 2016 Page 9 of 10 www reliablesprinkler com ...

Page 10: ... could cause improper operation or non operation Do not clean sprinklers with soap and water ammonia liquid or any other cleaning fluids Remove dust by gentle vacuuming without touching the sprinkler Replace any sprinkler which has been painted other than facto ry applied Properly installed Model CCP and Model G4 cover plates will have an air gap that is required for proper operation do not seal t...

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