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Guarantee

For the Reliable Automatic Sprinkler Co., Inc. guarantee, terms, 
and conditions, visit www.reliablesprinkler.com.

Patents

Patent Pending

Ordering Information

Specify the following when ordering.

        

Sprinkler

 

•  Model (LT56, LT56L, LT56-300, LT56L-300, LT56C)

 

•  Temperature Rating

 

•  Threads (1/2” NPT or ISO 7-1 R1/2)

 

•  Finish (See Table H)

        

Escutcheon or Cover Plate

 

•  Type (None, FV, FP, CCP, G4)

 

•  Finish (See Table H)

      

  Sprinkler Wrench

 

•  Model D (LT56, LT56L, LT56-300, LT56L-300 Pen   

 dent)
 

•  GFR2 (LT56, LT56L, LT56-300, LT56L-300 Re- 

 

 

cessed or Conical Concealed)

 

•  FC (LT56C Flat Concealed)

Maintenance

Reliable Model LT56 series sprinklers should be inspected and 
the sprinkler system maintained in accordance with NFPA 25, 
as well as the requirements of any Authorities Having Jurisdic-
tion.

Prior to installation, sprinklers should remain in the original car-
tons and packaging until used. This will minimize the potential 
for damage to sprinklers that 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 the gap or paint the cover plates. Model FV and FP 
escutcheons as well as Model CCP and Model G4 cover plates 
have holes in the ring or cup that must remain unobstructed.

Replace any sprinkler which has been damaged, cracked the 
glass bulb, or has lost liquid from the glass bulb. A stock of 
spare sprinklers should be maintained to allow quick replace-
ment of damaged or operated sprinklers. 

Failure to properly maintain sprinklers may result in inadvertent 
operation or non-operation during a fire event.

Bulletin 058 Rev. B
November 2016

Page 10 of 10

www.reliablesprinkler.com

Model LT56, LT56L, LT56-300 and LT56L-300 Sprinklers

Model LT56C Sprinklers

P/N 9999970493

 Wrench Options                                                                                                                   

Model D

Model GRF2

Model FC

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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