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Resumen del manual
3. In so far as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as rangehoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers. 4. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance will operate continuously. Enerco | Compact Unit Heater 8 Operating Instructions and Owner’s Manual LINE VOLTAGE FIELD WIRING N UNIT BLACK BLACK WHITE WHITE EQUIPMENT GROUND BLACK WIRE WITH WHITE TAPE OR L1 WHITE WIRE WITHOUT TAPE FIGURE 7 5. Test for spillage at the draft hood relief opening after five minutes of main burner operation. Use the flame of a matchor candle, or smoke from a cigarette, cigar, or pipe. 6. After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous condition of use. 7. If improper venting is observed during any of the above tests, the common venting system must be corrected. The common venting system should be resized to approach the minimum size as determined by using the appropriate tables in Appendix G in the current standards of the National FuelGas Code, ANSI Z223-1 in the U.S.A. and the appropriate Category I Natural Gas and Propane appliances venting sizing tables in the current standards of the CSA B149.1 Natural Gas and Propane Installation Code in Canada. NOTE Local codes may supersede any of the above provisions. ELECTRICAL CONNECTIONS NOTE The MHU/HSU series unit heaters use a direct spark ignition system. There is no pilot necessary as the spark lights the main burner as the gas valve is turned on. The direct spark ignition GAS SUPPLY CONNECTION MANUAL MAIN SHUT-OFF VALVE (FURNISHED BY INSTALLER) GROUNDED JOINT UNION 1/8 NPT GAS FLOW PLUGGED TAP DRIP LEG FIGURE 8 GAS SUPPLY TO UNIT HEATER WARNING Electric shock hazard. Can cause injury or death. Do not use this heater if any part has been under water. Immediately call a qualified service technician to inspect the furnace and to replace any part of the control system and any gas control which has been under water. WARNING Danger of explosion. Can cause injury or product or property damage. If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply. WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies. WARNING Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly. MANUAL MAIN SHUT-OFF VALVE WILL NOT HOLD NORMAL TEST PRESSURE CAP ISOLATE GAS VALVE UNIT HEATER FIGURE 9 Enerco | Compact Unit Heater 9 Operating Instructions and Owner’s Manual control board emits radio noise as the sparking process is underway. The level of energy may be sufficient to disturb a logic circuit in a microprocessor controlled thermostat. It is recommended that an isolation relay be used when connecting the unit heaters to a microprocessor controlled thermostat. Install the thermostat according to instructions provided. Select circuit protection and wire size according to the unit rating plate. Install a separate disconnect switch (protected by either fuse or circuit breaker) near the unit so that power can be turned off for servicing. Connect wiring through knockout on the junction box located on the side of the unit heater. Refer to heater wiring diagram for connection information. Use 18 gauge wire or larger for thermostat connections. Electrically ground unit in accordance with local codes or, in the absence of local codes, in accordance with the current National Electrical Code (ANSI/NFPA No. 70) in the U.S.A., and in Canada with the current Canadian Electrical Code, Part 1 CSA C22.1. NOTE Uninsulated ground wires must be wrapped in electrical tape to avoid damage to the electrical system. Make line voltage connections as shown in figure 7 . Connect field wiring as shown on wiring diagram on unit. Also refer to typical diagram in this manual. An additional thermostat wire must be run to terminal “G” on heater when continuous blower is desired. GASCONNECTION When connecting gas supply, the length of the run from the meter must be considered in determining the pipe size to avoid excessive pressure drop. A line pressure of 7" w.c. (178mm w.c.) for natural gas should be maintained when sizing piping. A line pressure of 13" w.c. (330mm w.c.) should be maintained for li...
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