Identification/Nameplate - Clarke C18H Instruction Manual

This section should be used in conjunction with
Sections 1 through 14 of the Operations and
Maintenance Manual, contained within this
document.

15.1.1 Identification/Nameplate

In addition to the information on a standard engine
nameplate, the PLD equipped Clarke Engine
models are also identified by a specific engine
model number on the Clarke nameplate. The
Clarke nameplate also includes: Control Pressure
Set Point, System Maximum Pressure, Variable
Speed Pressure Limiting Control (VSPLC) Rating,
Variable Speed Suction
(VSSLC) Rating, and Minimum Operating Speed.
(Ref. Fig #3).
Figure #25 – PLD / VSPLC&VSSLC nameplates
Example:
Model: C18H0-UFAD12-D
 C = Caterpillar base engine prepared by
Clarke
 18 = base engine displacement (18.1 liter)
 H = Heat Exchanger cooled
 0 = Non-Hazardous Location
 UF = Underwriters Laboratories Listed/
Factory Mutual Approved
 A = Manufactured in Cincinnati, OH
 D = EPA Tier 3 Emissions Certified
Limiting Control
53
 12 = A power rating code
 D = Suffix to signify a PLD equipped
Engine
– D-VSPLC
– S-VSSLC
– DS-VSPLC / VSSLC
Smart P/N – Clarke internal P/N to establish
engine bill of material
Mfg. S/N = Engine S/N
Rated Speed = Engine Rated Speed
Rated Power = Engine Rated HP
Control Pressure=
Factory Set Point Pressure. Engine will
begin to slow down once this system
pressure is exceeded.
System Max. Pressure=
Maximum Working
Sprinkler System.
VSPLC Rating, "Z"=
Variable Speed Pressure Limiting Control
Rating "Z" Factor. This "Z" value, when
multiplied by the pump differential shut-
off pressure, gives the maximum pressure
trimming capability of the PLD equipped
engine.
VSSLC Rating, "SZ"=
Variable Speed Suction Limiting Control
Rating "SZ" Factor. This "SZ" value will
be used by the manufacturer to determine
the capability of VSSLC for a given set of
operating conditions. Contact Clarke with
the following pieces of information about
the installation:
Pump curve (3 points min.)
Suction supply curve (2 points min.)
Elevation of system resistance curve
It will be necessary to run Clarke's VSSLC
Calculator program to determine
compatibility with the
Pressure of the