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-Connect a voltmeter across the end terminals of the male half of the Room Thermostat Snap-set. -Close each thermostat, zone valve and relay in the external circuit one zone at a time and check the voltage reading across the plug. -There should NEVER be voltage measured at the plug. -If voltage is measured at the plug under any condition, check and correct the external wiring. NOTICE In systems using 3-wire zone valves backfeed of voltage to the unit is a common problem. Use an isolation relay to prevent voltage from the external circuit entering the Room Thermostat Snap- set. 39 Start-Up Procedures SECTION XI - Start-Up Procedures Final Checks Before Start-up • Verify the ELITE and the primary and domestic systems are full of water and all system components are correctly set for operation. • Verify Start-up Preparation items outlined on pages 37 thru 39 have been completed. • Verify all electrical connections are correct and securely fasten. • Inspect vent piping and combustion air inlet piping for signs of deterioration from corrosion, physical damage or sagging. Verify combustion air piping and vent piping are intact and correctly installed. • Adjustment of the Secondary Thermostat Limit. The Secondary (Domestic) Thermostat located on left side of the control panel maintains the minimum domestic water storage temperature. Set the thermostat knob as shown in Fig. 22 page 42. Maximum limit setting is 140.F ELITE Start-up Turn the ON-OFF switch located on the front control panel to the OFF position. Turn the electrical supply or any service switch to the unit in the ON position. • Check Domestic Piping. Check domestic piping and system components for leaks. If found, shut down the unit and repair immediately. • Check Primary Piping. Check primary system piping and components for leaks. If found, shut down the unit and repair immediately. Purge any remaining air from the system piping. Air in the system piping will 40 interfere with circulation creating heat distribution problems and system noise. • Check Vent Piping Check for gas-tight seal at every connection and seam of the venting. WARNING Venting system must be sealed gas-tight to prevent flue gas spillage and potential carbon monoxide emissions, which will result in severe personal injury or death. • Check Gas Piping (if applicable) 1. Check around the unit for gas odor following the procedure outlined in this manual on Page 39. WARNING If any gas leaks are found or suspected, shut the unit down immediately. Use a gas detection device or bubble test to locate the source of the gas leak and repair at once. Do not operate the unit until the leak is corrected. Failure to comply with this procedure could result in severe personal injury, death or substantial property damage. • Check Oil piping (if applicable) Check for any leakage at the pump and all fittings • Verify Flame Pattern and Combustion Check the flame pattern through the inspection port of the burner. The flame should be stable. Test for CO2 or O2 and for CO. The combustion reading should be within the range listed in Table 2 page 41. The CO level should not exceed 100 ppm when combustion is correct. Start-Up Procedures WARNING A combustion test must be performed after any burner adjustments are made. Allow the unit to operate for approximately 10 minutes after adjustment before measuring any combustion levels. Failure to comply with these procedures could result in severe personal injury, death or substantial property damage. • Check overfire draft The overfire draft should measure typically (-) 0.01” w.c to(-) 0.02” w.c in the combustion chamber. Refer to Triangle Tube’s Burner Specification for actual measurements. • Measure Input - Natural Gas Only 1. Operate the unit for approximately 10 minutes. 2. Turn off all gas appliances within the building. 3. At the gas meter, record the time required to use one cubic foot of gas. 4. Calculate gas input using the following equation: 3600 x 1000 / number of second recorded for one cubic of gas = BTU/H. 5. The BTU/H calculated should approximate the input rating listed on the unit. Table 2: Recommended Combustion Levels Natural Gas Propane Oil O2 Min. 3.00% 3.00% 4.60% O2 Max. 5.00% 5.00% 6.00% CO2 Min 9.00% 10.50% 11.00% CO2 Max 10.00% 12.00% 12.00% 41 Temperature Limits SECTION XII -Temperature Limits DANGER Studies have indicated that dangerous bacteria can form in the potable water distribution system if certain minimum water temperatures are not maintained. For prevention of this, it is recommended that the Secondary Thermostat be set as shown in Fig. 23 and maintained at 130.F to 140.F. NOTICE To adjust the thermostat settings: -Turn thermostat knob clockwise to increase water temperature -Turn thermostat knob counterclockwise to decrease water temperature. Temperature Indicator • Setting Primary Thermostat Limit. -The Primary (Space Heating) Thermostat located on the right side of the control panel acts as the high limit during the space heatin...

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