Mestek SEPARATED COMBUSTION GAS FIRED PROPELLER UNIT HEATER Manual, Installation Instructions & Parts List

6, 6 INSTALLATION (continued) Unit heaters should not be installed to maintain low temperatures and/or freeze protection of buildings. A minimum of 50°F (10°C) thermostat setting must be maintained. If unit heaters are operated to maintain lower than 50°F (10°C), hot fl ue gases are c…

7, Maximum Capacity of Pipe in Cubic Feet of Gas per Hour (Cubic Meters per Hour) for Gas Pressures of 0.5 psig (3.5 kPa) or Less, and a Pressure Drop of 0.5 Inch Water Column (124.4 Pa) (Based on a 0.60 Specifi c Gravity Gas) Nominal Iron Internal Length of Pipe, Feet (met…

18, 18 OPERATION Never operate the unit beyond the specifi ed limits or severe damage to and or premature failure of the unit will result! EXPLANATION OF CONTROLS (see Figure 12) 1. Each Separated Combustion Unit Heater comes equipped with a power vent system that consists of a powe…

24, 7. Check thermostat and replace if defective. 8. Be sure 115 volts is supplied to the transformer primary, then check for 24 volts at secondary terminal before replacing. 9. Check and tighten all wiring connec- tions per diagrams. 10. Replace, if nec…

20, Mestek SEPARATED COMBUSTION GAS FIRED PROPELLER UNIT HEATER Table 6 - Main Burner Orifi ce Schedule* PRIMARY AIR SHUTTER ADJUSTMENT After the unit has been operating for at least 15 minutes, adjust the primary air flow to the burners. Turn the friction-locked, manually-rotated air shutters clockwise to close, or counterclockwise to open (see Fig…