Leslie Feedforward Water Heater

Leslie Constantemp Feedforward Steam Water Heaters

MODELS: E1500L, E300L, E4500L, E600L, E7500L, E900L, E10500L, E1200L

Leslie Constantemp heaters use a tightly-coiled circulating exchanger to transfer heat energy from the isolated steam flow to the desired liquid. These systems can take advantage of very low steam pressures and can deliver liquids at precisely defined temperatures. Leslie Constantemp steam heaters are available in Inlet pressure ranges: 2-15 psig. Heating is instant on demand with capacities up to 7,200 gallons per hour. Temperature variation is a maximum of ±3°F. The standard coil material is copper but Admiralty and cupro-nickel coils are available as special-service options. The heart of the Leslie Constantemp steam water heater is the feedforward blending device. The hot and cold water blend ratio is accurately proportioned to maintain the set temperature for all flow demands. Water is blended instantly; automatically; with virtually no lag in response time.

Applications:

  • Hospital Patient & Domestic Hot Water
  • University Dormitories
  • Safety Shower Systems Industrial Shower Rooms
  • Booster Heater
  • Building Heat

Features

  • Single or Double Wall Exchanger
  • Accuracy ± 3°F
  • Feed-Forward Control
  • Flows up to 120 GPM
  • Adjustable Temperature 105-180°F
  • No Storage Tank Required
  • Built In Safety
  • Heats Water Only on Demand
  • Fits Through Standard Doorways
  • 10 year Coil and Pressure Vessel Warranty

Material

Exchanger:
Ductile iron (75 psi)
Cast Steel (150 psi)
Blending Valve:
Body: Bronze
Plug: Hastalloy
Coils: Copper Standard;
Options: Cupro-nickel
Admiralty
Stainless Steel

Design

Adjustable Temperature Range:
45-120 GPM: 105-180°F (41-82°C)
15 and 30 GPM: 105-150°F (41-65°C)
Steam pressure: 2-250 PSIG over 15 PSIG
Water pressure: 150 PSI MAX
Flow ranges: 15, 30, 45, 60, 75, 90, 105, 120
GPM: 57, 114, 170, 227, 284, 341, 397, 454 L/min

Temperature

45-120 GPM:
105-180°F (41-82°C)
15 and 30 GPM:
105-150°F (41-65°C)

Pressure

Steam: 2-250 PSIG over 15 PSIG
Water pressure: 150 PSI Max

Capacity

Flow ranges: 15, 30, 45, 60, 75, 90, 105, 120
GPM: 57, 114, 170, 227, 284, 341, 397, 454 L/min

Options

Skidded
Recirculation Kit
Insulated Cover
Pressure Gradient Monitor

Certifications, Standards, & Approvals

Safe water drinking act compliant;
NSF 61 and NSF/ANSI 61

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