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The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa). 9 ELECTRICAL CONNECTIONS HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death. Standard units are shipped for use on 115 volt, 60 hertz, single phase electric power. The motor name-plate and electrical rating of the transformer should be checked before energizing the unit heater electrical system. All external wiring must conform to the latest edition of ANSI/NFPA No. 70, National Electrical Code, and applicable local codes; in Canada, to the Canadian Electrical Code, Part 1, CSA Standard C22.1. Do not use any tools (i.e. screwdriver, pliers, etc.) across terminals to check for power. Use a voltmeter. It is recommended that the electrical power supply to each unit heater be provided by a separate, fused, and permanently live electrical circuit. A disconnect switch of suitable electrical rating should be located as close to the gas valve and controls as possible. Each unit heater must be electrically grounded in accordance with the latest edition of the National Electrical Code, ANSI/NFPA No. 70, or CSA Standard C22.1. Refer to Figures 7, 8, 9, 10A, 10B, 10C, 11A, 11B and 11C. Figure 7 - Low-voltage Thermostat Wiring Single Stage Figure 8 - Low Voltage Thermostat Wiring Two Stage THERMOSTAT WIRING AND LOCATION: NOTICE: The thermostat must be mounted on a vertical, vibration-free surface, free from air currents, and in accordance with the furnished instructions. Mount the thermostat approximately 5 feet (1.5m) above the floor, in an area where it will be exposed to a free circulation of average temperature air. Always refer to the thermostat instructions, as well as our unit wiring diagram, and wire accordingly. Avoid mounting the thermostat in the following locations: 1. Cold Areas- Outside walls or areas where drafts may affect the operation of the control. 2. Hot Areas- Areas where the sun's rays, radiation, or warm air currents may affect the operation of the control. 3. Dead Areas- Areas where the air cannot circulate freely, such as behind doors or in corners. THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS: The initial heat anticipator setpoint should equal the thermostat's current amperage draw when the unit is firing. This setpoint should be measured for the best results. Use the recommended ranges for a guide. If further information is needed, consult your thermostat manufacturer's instructions. Recommended heat anticipator setting .35 Amps NOTICE: The start-up fan delay should not exceed 30 seconds from a cold start. IMPORTANT: For all wiring connections, refer to the wiring diagram shipped with your unit (either affi xed to the side jacket or enclosed in the installation instructions envelope). Should any original wire supplied with the heater have to be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C. Figure 9 - T834H or T834N Thermostat Wiring R G W1 W2 W R G D6922C 10 ELECTRICAL CONNECTIONS (continued) Figure 10A - UT Control Board Figure 11A - Honeywell Control Board 11 12 ELECTRICAL CONNECTIONS (continued) Figure 10B - Tubular Propeller Units 30-120 with Natural and Propane (LP) Gas with Single Stage Gas Control and UT Control Board NOTICE: See Figures 7, 8, 9, 10B, 10C, 11B and 11C for connecting the thermostat to the unit heater. If using a standard low voltage thermostat with a sub-base switch for fan control, connect the G terminal of the thermostat to the G terminal of the unit heater. 13 Figure 10C - Tubular Propeller Units 60-120 with Natural and Propane (LP) Gas with Optional Two Stage Gas Control and UT Control Board ELECTRICAL CONNECTIONS (continued) NOTICE: See Figures 7, 8, 9, 10B, 10C, 11B and 11C for connecting the thermostat to the unit heater. If using a standard low voltage thermostat with a sub-base switch for fan control, connect the G terminal of the thermostat to the G terminal of the unit heater. 14 ELECTRICAL CONNECTIONS (continued) Figure 11B - Tubular Propeller Units 30-120 with Natural and Propane (LP) Gas with Single Stage Gas Control and Honeywell Control Board NOTICE: See Figures 7, 8, 9, 10B, 10C, 11B and 11C for connecting the thermostat to the unit heater. If using a standard low voltage thermostat with a sub-base switch for fan control, connect the G terminal of the thermostat to the G terminal of the unit heater. 15 Figure 11C - Tubular Propeller Units 30-120 with Natural and Propane (LP) Gas with Optional Two Stage Gas Control and Honeywell Control Board ELECTRICAL CONNECTIONS (continued) NOTICE: See Figures 7, 8, 9, 10B, 10C, 11B and 11C for connecting the thermostat to the unit heater. If using a standard low voltage thermostat with a sub-base switch for fan c...

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