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To check system pressure, put a plugged 1/8” NPT tapping in the gas line at the connection to the burner farthest from the supply. Before connecting the burners to the supply system, verify that all high pressure testing of the gas piping has been completed. Do not high pressure test the gas piping with the burners connected. Follow these instructions to ensure a professional gas supply installation: • Support all gas piping with suitable pipe hanging materials. • Use wrought iron or wrought steel pipe and malleable iron fitting. All pipe fittings should be new and free from defects. Carefully ream the pipe and tubing ends to remove obstructions and burrs. • Use L.P. gas-resistant joint compound on all pipe threads. • Check the pipe and tubing ends for leaks before placing heating equipment into service. When checking for gas leaks, use soap and water solution: NEVER USE AND OPEN FLAME. Install the flex gas connector as shown. The flex gas connector accommodates expansion of the heating system and allows for easy installation and service of the burner. FIGURE 17: Gas Line Connection with Stainless Steel Flex Gas Connector Shut-Off Valve must be parallel to burner gas inlet. The 2” displacement shown is for the cold condition. This displacement may reduce when the system is fired. Shut – off Valve 2" 12" 0° 1/2" Stainless Steel Flex Gas Connector Stk. #16401 45° 45° 90° Section 6 Wiring Heaters are normally controlled by thermostats. Line voltage thermostats are wired directly (see Figure 18a), the recommended 24V thermostats use a relay (see Figure 18b). Heaters must be grounded in accordance with the National Electric Code ANSI/NFPA - 70 - latest version. Heaters may also be controlled with a manual line voltage switch or timer switch in place of the thermostat. FIGURE 18a: Line Voltage Thermostat Wiring FIGURE 18b: Low Line Voltage Thermostat Wiring VAC120120V24VBlackBlackPurpleYellowYellowBlackBlackBlackGreenGreenOrangeTransformerWhiteWhiteWhiteTHERMOSTATWhiteBlueGas ValveAir SwitchIgnitorSensorMotor / BlowerDoor SwitchTerminalBushing THN120v – 60 HzWhiteWhiteGreenGreenSupply Circuit120v – 60 HzSupply CircuitBurners(Maximum – 2 per Thermostat) Burners(Maximum – 1 per Thermostat) BlackBlackHNT THN120v – 60 HzWhiteWhiteGreenGreenSupply Circuit120v – 60 HzSupply CircuitBurners(Maximum – 2 per Thermostat) Burners(Maximum – 1 per Thermostat) BlackBlackHNT FIGURE 19: Wiring of Low Voltage Thermostat and Relay When using 1-2 burners, use SPDT Transformer Relay / Stk. # 00172 When using 3-4 burners, use DPDT Transformer Relay / Stk. # 00183 Wires marked with an asterisk (*) are for use only with DPDT Transformer Relay. FIGURE 20: Ener-Radiant XL Burner Internal Wiring • If any of the original wire as supplied with the appliance must be replaced, it must be replace with wiring material having a temperature rating of at least 105°C and 600 volts. • Each burner must be electrically grounded in accordance with the National Electric Code ANSI/NFPA - 70 - latest version. FIGURE 21: Ener-Radiant XL Burner Internal Wiring Ladder Diagram 120VL2(NEUTRAL) WhiteWhiteWhiteWhiteWhiteWhiteGrayOrangeTransfomerThermostatAir SwitchGas ValveDoor SwitchMotor / BlowerIgnitorSensorBlueYellowYellowPurpleBlackBlackBlackBlackL2 (HOT) 24V BCWBlackBlackWhiteWhiteBurner 3120V – 60HzSupply CircuitBurner 1Burner 2Burner 4WhiteNHNHRedRed/Yellow* Purple* BlackGreenWhiteGY36542TTransformer Relay Low Voltage Thermostat Stk. #10368 Section 7 Operation & Maintenance Sequence of Operation 1. Turn the thermostat up. When the thermostat calls for heat, blower motor will energize. 2. When the motor approaches nominal running RPM, the air proving switch closes and activates the ignition module. 3. The ignition module then energizes the hot surface igniter for a timed warm-up period (approximately 45 to 60 seconds.) 4. After the warm-up period, the gas valve is energized. 5. During the last part of the sequence, the igniter is de- energized and is converted to a flame sensing rod. 6. If a flame is detected, the gas valve remains open. When the call for heat is satisfied, and the system control mechanism de-energizes the burner line voltage supply, the gas valves are turned off. 7. If no flame is detected on a single-try module, the gas valve is closed, and the module will lockout until it is reset. Reset is accomplished by removing power from the module for at least five (5) seconds (thermostat cycle required.) 8. If no flame is detected on a three-trial module, the gas valve is closed, and a purge period begins. After the purge, the module acts to power the igniter for a second warm-up period, and a second trial for ignition period. If flame is still not established, a third and final purge, warm-up, and trial cycle begins. After three ...

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