STIEBEL ELTRON CF 12 KW Operation And Installation
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STIEBEL ELTRON CF 12 KW Operation And Installation

STIEBEL ELTRON CF 12 KW Operation And Installation

Electromechanically controlled instantaneous water heater
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OPERATION AND INSTALLATION
ELECTROMECHANICALLY CONTROLLED INSTANTANEOUS WATER HEATER
» CF 12 KW
» CF 15 KW
» CF 18 KW
» CF 24 KW
» CF 27 KW
» CF 36 KW
» CF 48 KW
» CF 54 KW
» CF 60 KW
» CF 72 KW
» CF 81 KW
» CF 90 KW
» CF 108 KW
» CF 120 KW
» CF 144 KW
Conforms to ANSI/UL Std. 499
Certified to CAN/CSA Std. C22.2 No.88

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February 4, 2025

trying to do a yearly preventive maintenance on this cf 27 wk

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Summary of Contents for STIEBEL ELTRON CF 12 KW

  • Page 1 OPERATION AND INSTALLATION ELECTROMECHANICALLY CONTROLLED INSTANTANEOUS WATER HEATER » CF 12 KW » CF 15 KW » CF 18 KW » CF 24 KW » CF 27 KW » CF 36 KW » CF 48 KW » CF 54 KW »...

  • Page 2: Table Of Contents

    USA 413.247.3380 and we will refer you to a qualified Electric supply _______________________________________________________ 7 Stiebel Eltron service representative in your area. Terminal block torque _____________________________________________ 7 This is the safety alert symbol. It is used to alert you to Commissioning _________________________________________________ 7 potential personal injury hazard.

  • Page 3: Other Symbols In This Document

    OPERATION SAFETY 1.1.3 Keywords Damage to the water heater and the environment The water heater must be installed by a licensed electrician KEYWORD Description and plumber. The installation must comply with all national, DANGER If this information is not observed, it will result in serious state and local plumbing and electric codes.

  • Page 4: Functional Characteristics

    OPERATION FUNCTIONAL CHARACTERISTICS Functional characteristics The well-insulated CF is an electromechanically temperature con- trolled water heater. Stainless steel heat exchangers heat water as it passes through in meandering loops. Each loop contains an element arrangement. The number of loops depend on the capacity size of the heater.

  • Page 5: Troubleshooting

    OPERATION TROUBLESHOOTING Troubleshooting Solutions based on symptoms in fault table Symptom Analysis Solution Before troubleshooting, check the following items: No power Activate power Is the water pressure more than 3 psi (0.21 bar)? No continuity Replace on/off switch (6) Is the electric supply a: No continuity Replace delay timer (4) - Wye (4 wires + ground) or...

  • Page 6: Mounting The Water Heater

    INSTALLATION MOUNTING THE WATER HEATER 5.1.2 Mounting screw positions INSTALLATION Mounting the water heater CAUTION: Injury Hot water outlet pipes leaving unit can be hot to the touch. Insulation must be used for hot water pipes below 36˝ (0.9 m) due to burn risk to children. NOTICE: This unit should not be installed in a location where it may be exposed to temperatures less than...

  • Page 7: Leakage Check

    Stiebel Eltron water heaters are designed for a very long service life. Actual life expectancy depends on water quality and use. To ensure Feed the wire through the knockout (A) using a Romex clamp consistent water flow, remove scale build up on the faucet or any...

  • Page 8: Technical Data

    Pipe Standard 3-phase Amp Draw Size (A) Elements Size Enclosure Size (inches) Excluding fittings (W x H x D in inches) Fixed temperature thermostat CF 12 KW CF-012-208D 11.27 31.27 ¾ ⁄ x 15 ⁄ ⁄ MUST BE CF-012-240D 12.50 30.07...

  • Page 9: Dimension Drawings

    INSTALLATION TECHNICAL DATA 10.1 Dimension drawings 10.1.1 CF 12–18, NEMA 3 enclosure Hot outlet Cold inlet Capacity No. of Elements A 12–18 ˝ ˝ ˝ ˝ 2˝ 10.1.2 CF 12–36, NEMA 4/4X enclosure Hot outlet Cold inlet Capacity No. of Elements A 12–18 ˝...
  • Page 10 INSTALLATION TECHNICAL DATA 10.1.3 CF 24–36, NEMA 3 enclosure Hot outlet Cold inlet Capacity No. of Elements A 24–36 ˝ 9 ¼˝ ˝ ˝ 3˝ 10.1.4 CF 48–72, NEMA 3 enclosure Hot outlet Cold inlet Capacity No. of Elements A 48–72 ˝...
  • Page 11 INSTALLATION TECHNICAL DATA 10.1.5 CF 81–144, NEMA 3 enclosure / CF 48–144, NEMA 4/4X enclosure Hot outlet Cold inlet Capacity No. of Elements A 48–72 ˝ ˝ 24˝ 48˝ 4˝ ˝ ˝ 81–108 ˝ ˝ 24˝ 48˝ 4˝ 37 ¾˝ 32 ¼˝...

  • Page 12: Wiring Diagrams

    INSTALLATION TECHNICAL DATA 10.2 Wiring diagrams 10.2.1 CF 12–18, 208 V & 240 V Delta wiring diagram This diagram is valid for: CF 12 208/240 V, CF 15 208/240 V, CF 18 208/240 V HX Flow Layout Delta Configuration Fuse block Low pressure switch F1-F3 Fuse...
  • Page 13 INSTALLATION TECHNICAL DATA 10.2.2 CF 12–18 400 V & 480 V Wye wiring diagram This diagram is valid for: CF 12 400/480 V Wye, CF 15 400/480 V Wye, & CF 18 400/480 V Wye HX Flow Layout Wye Configuration Low pressure switch Fuse block F1-F3...
  • Page 14 INSTALLATION TECHNICAL DATA 10.2.3 CF 24–36, 208 V & 240 V Delta wiring diagram This diagram is valid for: CF 24 208/240 V, CF 27 208/240 V, CF 36 208/240 V HX Flow Layout Delta Configuration Low pressure switch Fuse block F1-F6 Fuse R1-R6...
  • Page 15 INSTALLATION TECHNICAL DATA 10.2.4 CF 24–36, 400 V & 480 V Delta wiring diagram This diagram is valid for: CF 24 400/480 V, CF 27 400/480 V, & CF 36 400/480 V HX Flow Layout Delta Configuration R1-R6 Resistance element Thermostat block 1 Element block 1 F1-F3...
  • Page 16 INSTALLATION TECHNICAL DATA 10.2.5 CF 24, CF 36 575 V Delta wiring diagram This diagram is valid for: CF 24 575 V & CF 36 575 V HX Flow Layout Delta Configuration R1-R6 Resistance element Thermostat block 1 F1-F3 Fuse Element block 1 T1-T6 Thermostat...
  • Page 17 INSTALLATION TECHNICAL DATA 10.2.6 CF 48–72, 208 V & 240 V Delta wiring diagram This diagram is valid for: CF 48 208/240 V, CF 54 208/240 V, CF 60 208/240 V, & CF 72 208/240 V Delta Configuration HX Flow Layout Low pressure switch F1-F12 Fuse...
  • Page 18 INSTALLATION TECHNICAL DATA 10.2.7 CF 48–72, 400 V & 480 V Delta wiring diagram This diagram is valid for: CF 48 400/480 V, CF 54 400/480 V, CF 60 400/480 V, & CF 72 400/480 V HX Flow Layout Delta Configuration Fuse block R1-R12 Resistance element...
  • Page 19 INSTALLATION TECHNICAL DATA 10.2.8 CF 48, CF 72 575 V Delta wiring diagram This diagram is valid for: CF 48 575 V & CF 72 575 V HX Flow Layout Delta Configuration Fuse block R1-R12 Resistance element Thermostat block 1 F1-F6 Fuse T1-T12...
  • Page 20 INSTALLATION TECHNICAL DATA 10.2.9 CF 81–108, 400 V & 480 V Delta wiring diagram This diagram is valid for: CF 81 400/480 V, CF 90 400/480 V, & CF 108 400/480 V HX Flow Layout Delta Configuration R1-R18 Resistance element Fuse block F1-F9 Fuse...
  • Page 21 INSTALLATION TECHNICAL DATA 10.2.10 CF 108 575 V Delta wiring diagram This diagram is valid for: CF 108 575 V HX Flow Layout Delta Configuration R1-R18 Resistance element Fuse block F1-F9 Fuse Thermostat block 1 T1-T18 Thermostat Element block 1 Element block 2 Contactor Main terminal block...
  • Page 22 INSTALLATION TECHNICAL DATA 10.2.11 CF 120–144, 400 V & 480 V Delta wiring diagram This diagram is valid for: CF 120 400/480 V & CF 144 400/480 V Delta Configuration HX Flow Layout R1-R24 Resistance element F1-F12 Fuse Fuse block T1-T24 Thermostat Thermostat block 1...
  • Page 23 INSTALLATION TECHNICAL DATA 10.2.12 CF 144 575 V Delta wiring diagram This diagram is valid for: CF 144 575 V Delta Configuration HX Flow Layout R1-R24 Resistance element F1-F12 Fuse Fuse block T1-T24 Thermostat Thermostat block 1 Element block 1 Contactor Element block 2 Low pressure switch...

  • Page 24: Maximum Temperature Rise

    INSTALLATION TECHNICAL DATA 10.3 Maximum temperature rise Power Flow Rate Temperature Rise Output Gallons/Min. of Model Gallons/Hr. 20°F 30°F 40°F 50°F 60°F 70°F 80°F 90°F 100°F 110°F 120°F 130°F 12 kW 15 kW 18 kW 24 kW 27 kW 36 kW 12.3 48 kW 16.4...

  • Page 25: Spare Parts And Service Advice

    INSTALLATION SPARE PARTS AND SERVICE ADVICE 11. Spare parts and service advice Check each element with an Ohm meter for correct reading. See 4.3, “Cold element resistivity by heater type (in Ohms)”, pg. 5 to identify the element resistivity according to the heater DANGER: Electrocution name plate and wattage.
  • Page 26 INSTALLATION SPARE PARTS AND SERVICE ADVICE Replace the transformer and rewire the spare part transformer as before. Pressure switch It is possible for the pressure switch to be become so blocked with residue or dirt that it does not function and allow the heater to turn Disconnect the heater from the power supply.

  • Page 27: Warranty

    Environment and recycling This Warranty is valid for U.S.A. & Canada only. Warranties may vary by country. Please consult your local Stiebel Eltron Repre- Please help us to protect the environment by disposing of the sentative for the Warranty for your country.
  • Page 28 TANKLESS, Inc. A Stiebel Eltron Company 2060 Whitfield Park Ave. | Sarasota, FL 34243 Tel. 800.TANKLESS (800.826.5537) | Fax 941.755.6529 tanklessinc stiebel-eltron-usa.com STIEBEL ELTRON, Inc. 17 West Street | West Hatfield MA 01088 Tel. 413.247.3380 | Fax 413.247.3369 info stiebel-eltron-usa.com www.stiebel-eltron-usa.com...

This manual is also suitable for:

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