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NOTE : USE LATEST EDITION FOR ALL ANSI STANDARD AND CANADIAN STANDARDS. Figure 2 MODEL NO. BTU/HR. RATING GAS SUPPLY PRESSURE (W.C.) ORIFICE SIZE GAS MIN. MAX. MANIFOL D NATURAL PROPANE NAT. L.P. NAT. L.P. NAT. L.P. NAT. L.P. 4030 30,000 30,000 6.6” 11” 14” 14” 5.6” 10” 43 52 4040 40,000 40,000 6.8” 11” 14” 14” 5.8” 10” 37 49 8050 50,000 50,000 7.0” 11” 14” 14” 4.3” 10” 30 45 8060 60,000 60,000 7.0” 11” 14” 14” 5.8” 10” 29 43 8070 70,000 – 7.0” – 14” – 6.0” – 28 – 9080 80,000 80,000 7.0” 11” 14” 14” 5.8” 10” 37 49 9090 90,000 90,000 7.0” 11” 14” 14” 5.0” 10” 32 47 9100S 100,000 100,000 7.0” 11” 14” 14” 5.0” 10” 31 46 9100 100,000 100,000 7.0” 11” 14” 14” 4.3” 10” 30 45 9120 120,000 120,000 7.0” 11” 14” 14” 5.8” 10” 29 43 9140 140,000 – 7.0” – 14” – 5.5” – 28 – Enerco Group, Inc. | Gas-Fired Infra-Red Space Heaters 5 Operating Instructions and Owner’s Manual CONNECTI ON DIAGRA M FOR FLA ME ROD CURENT FOR FLA ME RECTI FICATI ON SYSTE MS (DSP -5, A5) MEANS OF PR OVING ADE QUATE GR OUNDING AREA The proper flame-rod-to-ground-area ratio cannot always be determined by visual examination or physical measurement. A positive means of checking the installation is the measurement of the flame rod current under actual firing conditions. It is definitely recommended that the installer measure the current flow between the lead of the flame rod unit and the terminal in the control terminal board (see Figure 3). Measure the current with a DC Microammeter or equal. We recommend a steady output of .9 microamperes or more. A steady flow of current in this amount under actual firing conditions will generally indicate adequate grounding of the pilot flame. NOTE : 1. Read all control data sheet supplied with this heater. 2. Check flame rod for any contact to heater parts. Flame rod must be free of any contact to heater. Contact with heater will short circuit flame rod. 3. Cracked porcelain on flame rod will short circuit sensor. Replace flame rod. Figure 3 – Using a microammeter to prove adequate grounding area. Gas Flame Flame Rod Flame Rod Assy. Microammeter Control Terminal For Flame Rod Loadwire G THER MOSTAT Thermostat Powerpile Thermocouple Honeywell Q313A Factory wired Powerpile Gas Valve – Honeywell VS820 WIRE SIZES MAXIMUM LE NGTH OF WIRE CABLE NO 18 15 FEE T NO 16 30 FEE T NO 14 50 FEE T CAUTION TO INSTALLER NEVER CONNECT POWERPILE GAS VALVE OR THERMOSTAT TO LINE VOLTAGE OR A TRANSFORMER. NOTE Do not exceed the maximum lengths listed in the table when wiring between the Thermostat and Gas Valve with cable not supplied by HEAT STAR. CONNECTION DIAGRAM Enerco Group, Inc. |Gas-Fired Infra-Red Space Heaters 6 Operating Instructions and Owner’s Manual SP 715A IGN SP 745 PV GND TR PV/MV TH MV LO GIC BOX THERMOSTAT NOT BY HEAT STAR 120 VAC 24 VOL T THERMOSTAT OPTIONAL 24 VAC TRANSFORMER (SHIPPED LOOSE) COMBINED LOAD : 1.5 AMP. PILO T BURNER SPARK ELE CTRODE...

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