Tankless electric whole house water heaters TRONIC 6000C Models: WH17 / WH27 6 720 646 951 (2015/04) US [en] Installation Manual and Operating Instructions
| Table of contents Table of contents 1 Explanation of symbols and safety instructions 1 Explanation of symbols and safety instructions . . . . 2 1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . 3 1.1 Key to symbols 2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.1Approval number . . . . . . . . . . . . . .
Explanation of symbols and safety instructions | 3 1.2 IMPORTANT SAFETY INSTRUCTIONS When using this electrical equipment, basic safety precautions should always be followed, including the following: ▶ READ AND FOLLOW ALL INSTRUCTIONS. ▶ This appliance must be grounded. ▶ Disconnect this product from the electrical supply before cleaning, servicing or removing the cover. ▶ To reduce the risk of injury, close supervision is necessary when the product is used near children or elderly persons.
| General information 2 General information 2.1 Disclaimer 2.1.1 Approval number Commonwealth of Massachusetts In the Commonwealth of Massachusetts a licensed plumber and electrician must perform the installation. 2.2 Technical identification code EI 17 E/M W I H B EI 27 E/M W I H B Table 2 [EI] [17/27] [E/M] [W] [I] [H] [B] 2.
General information | 5 2.5 Components Diagram Fig. 1 [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] Heating module Heating element assembly Heating module PCB Double pole thermal cut-off (WH27). Single pole thermal cut-off (WH17). 6 way terminal block (WH27). 4 way terminal block (WH17).
| General information 2.6 Dimensions Fig.
General information | 7 2.7 Wiring diagram DANGER: Risk of electric shock! ▶ Always switch off the electricity supply to the unit before any intervention in the heater. Fig. 3 Internal wiring schematic for single phase WH17 unit.
| General information Fig. 4 2.8 Internal wiring schematic for single phase WH27 unit. Function How the water heater works: • The Tronic 6000C heats water continuously as it flows through the 2 heater modules. • The electronic control PCB monitors the flow rate and the incoming water temperature and then switches on the required number of heater elements to reach the temperature set by the temperature adjustment dial. • The temperature dial sets the heater set-point temperature.
Regulations | 9 2.9 Technical specifications Technical characteristics Voltage supply Amperage Maximum output Units WH17 WH27 V 2 X 240VAC (Canada 240VAC) 3 X 240VAC (Canada 240VAC) A 2 X 40A (Canada 1 x 80A) 3 X 40A (Canada 1 x 120A) kW 17.25kW 26.85kW 95 °F to 131 °F 95 °F to 131 °F Temperature control range Minimum water pressure psi 15psi 15psi Maximum water pressure psi 150psi 150psi Minimum flow rate gal/min Maximum flow rate Weight (without water) 0.6 US gal / min 0.
| Installation 4 Installation 4.2 WARNING: Risk of freezing! ▶ Do not install the water heater in an area where there is a chance of freezing. Damage to the water heater as a result of freezing will not be covered under warranty. DANGER: Risk of electric shock! ▶ For safety reasons, disconnect the power supply to the heater before any service or testing is performed. WARNING: ▶ This heater must be electrically grounded in accordance with the most recent edition of the National Electrical Code.
Installation | 11 4.2.2 Recommended minimum clearances for servicing Should it be necessary to service the Tronic 6000C, observe the following clearances. These are not required clearances, but would facilitate any service work. ▶ Drill the holes and secure the heater using the four wood screws supplied. Fig. 6 4.4 Fig. 5 WH17 WH27 12" 12" Sides 0" 0" Bottom (B) 6" 6" Front (C) 12" 12" 4.3 Water connections WARNING: ▶ Do not install a non-return check valve within 10 feet of the inlet.
| Installation ▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe dope. ▶ Remember to keep the hot water pipe runs as short as possible. After the heater has been plumbed, and before you wire it, flush it with water to remove any debris or loose particles. Heater must be full of water and air purged before power is turned on. Failure to do so may result in damage to the product that is not covered by warranty.
Installation | 13 The WH17 requires two independent 240V AC circuits protected by two separate and independent double pole breakers (as shown) rated at 40A each. Fig. 7 WH17 terminal block connection (U.S.A. only) The WH27 requires three independent 240V AC circuits protected by three separate and independent double pole breakers (as shown) rated at 40A each. Fig. 8 WH27 terminal block connection (U.S.A.
| Installation Canada Wiring - auxiliary terminal block and connections Fitting the auxiliary terminal block (see diagram below). ▶ Connect the red wires from the left hand terminal of the new block to the L1 terminals in the unit. (There are two red wires required in the WH17 and three in the WH27). ▶ Connect the blue wires from the right hand terminal of the new block to the L2 terminals in the unit. (There are two blue wires required in the WH17 and three in the WH27).
Installation | 15 4.6 Starting up 4.6.1 Checking for leaks and purging air ▶ Verify all circuit breakers supplying power to the water heater are turned off. ▶ Open all hot water taps supplied by the water heater and inspect all water connections for leaks. ▶ With all hot water taps still open, inspect each tap to ensure all air in the lines has been purged out. ▶ Close all hot water taps and proceed to the next section. 4.6.
| Operation instructions For example, calculations for desired outlet temperature of 125F and supply voltage of 240VAC. Please look at Table 5 for derates of various supply voltages: • For the WH17 unit, using the inlet valve, ensure the flow rate does not exceed 1.7 gallons/minute. • For the WH27 unit, using the inlet valve, ensure the flow rate does not exceed 2.6 gallons/minute. These figures are based on an inlet water temperature of 55 °F and a supply voltage of 240 volts.
Maintenance | 17 6 Maintenance Draining the heater Due to the shape of the heat exchangers and connecting pipe, it is extremely difficult to get all of the water out of the heater. Follow the procedure below to best minimize the chance of freeze damage: ▶ Disconnect electric supply. ▶ Disconnect cold and hot water pipes from fittings on bottom of heater. Allow water to drain out (have a catch basin ready).
| Maintenance Using an ohm meter to check for premature element failure On WH17 model, there is no middle element Fig. 13 Heating elements Meter probes Ohm Readings Outer to Outer 10.5 ± 0.6 Ohms Middle to Middle 11.7 ± 0.8 Ohms Inner to Inner 15.1 ± 1 Ohms Table 9 Meter probes Ohm Readings Outer to Outer 10.5 ± 0.6 Ohms Middle to Middle 11.7 ± 0.8 Ohms Inner to Inner 21.0 ± 1.
Troubleshooting | 19 7 Important: If you are unable to perform the tasks listed below, or need additional assistance please contact your original installer/licensed electrician. Troubleshooting DANGER: Risk of electric shock! ▶ Always switch off the electricity supply to the unit before you remove the cover. Cold water only – Neon light off Flow rate is too low Verify the flow rate out of fixture is at or above the minimum activation rate required for the unit to activate. (Activation rates: WH17 = 0.
| Troubleshooting Cold water only – Neon light off Premature element failure Have a licensed electrician Shut off power to the unit and remove cover. Use an ohm meter to verify correct resistance on each element in Section 6 Maintenance. If readings are different than listed specifications on in Section 6 Maintenance, tables 11 and 12, contact Technical Support 800-798-8161 for further instruction.
Troubleshooting | 21 Water Temperature too Hot Temperature dial set too high Turn the temperature knob located on the front of the water heater counterclockwise for cooler temperatures. There are restrictions in the plumbing Obstructions in the water path can restrict the flow of water through the heater causing overheating. Verify the heater’s inlet filter screen, faucet aerators, showerheads and whole house filters are clear of debris.
| Spare Parts 8 Spare Parts Fig.
Spare Parts | 23 17kW model 27kW model # Description Part Number Description Part Number 1 PCB mount 8-738-701-722-0 PCB mount 8-738-701-722-0 2 - - Single Triac 8-738-701-733-0 3 Dual Triac 8-738-701-723-0 Dual Triac 8-738-701-723-0 4 1 Pole Thermal Cutout 8-738-701-727-0 2 Pole Thermal Cutout 8-738-701-740-0 5 Element Assembly 1 8-738-701-730-0 Element Assembly 1 8-738-701-737-0 6 Element Assembly 2 8-738-701-728-0 Element Assembly 2 8-738-701-736-0 7 Control Knob 8-
