ملخص المحتوى في الصفحة رقم 1
INSTALLATION & MAINTENANCE MANUAL FOR
â
QuickDraw
SEMI-INSTANTANEOUS
ENERGY: STEAM TO WATER
U-TUBE SINGLE-WALL & DOUBLE-WALL HEAT EXCHANGERS
FLOOR FLOOR
DRAIN DRAIN
Typical Construction
Figure 34-1
1. U-tube Heat Exchanger 10. Potable Water Inlet
2. Steam Inlet ** 11. Check Valve **
3. Shutoff Valve ** 12. Intratank Circulator *
4. Y-Strainer * 13. Potable Water Outlet
5. Steam Pressure Gauge * 14. Tank Drain Valve
6. Steam Valve 15. Relief Valve
7. Condensate Drain ** 16. Cont
ملخص المحتوى في الصفحة رقم 2
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL WARNING! Setting the temperature selector to higher settings provides hotter water which increases the risk of scald injury. Households with small children or invalids may require a 125°F or lower temperature setting to reduce the risk of scald injury. Allow a few days of operation at your selected setting to determine the correct temperature setting consistent with your needs. CONNECTING UNIT joints or studded connections. Shutof
ملخص المحتوى في الصفحة رقم 3
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL (con't) RELIEF VALVE PIPING The water heater is supplied with a pressure injury and/or water damage can occur from and temperature relief valve, sized in either the manual lifting of the lever or the accordance with ASME requirements. Each normal operation of the valve if it is not relief valve should be piped to a suitable floor piped to a proper drain. Insure that the drain. No reducing coupling or other restriction safety relief val
ملخص المحتوى في الصفحة رقم 4
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL (con't) STEAM VALVES CAUTION Most valve problems are caused by dirt or 1. One or more two-position, on-off, electric trash in the steam line. This is most likely to valves are used to control the flow of steam. occur during installation. Teflon pipe tape, The valves will return to the closed position pipe joint compounds, metal particles and dirt when power is off. This feature will prevent an will clog up strainers and orifices an
ملخص المحتوى في الصفحة رقم 5
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL (con't) START-UP PROCEDURE 1. Fill tank with water; open relief valve to main steam supply valve. This will allow purge air from top of tank. Check for condensate that has collected in the supply plumbing leaks. line to drain through the trap installed in front of the steam valve. When the steam 2. Push control switch, located on the control supply line is free of condensate, push box, to activate the steam valve and operating swit
ملخص المحتوى في الصفحة رقم 6
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL (con't) TROUBLESHOOTING NOTES Problem: 1. No hot water at even low flow a. Cause: Steam valve(s) not opening Solution: Check that electrical coils are energized. If not, trace wiring problem. If so, the valve may be faulty, the steam pressure inadequate to open the valve (< 5 psi depending on the valve), or the linkage (if applicable) is out of adjustment. b. Cause: Condensate flow is blocked Solution: Float-type traps will n
ملخص المحتوى في الصفحة رقم 7
QuickDraw STEAM WITH SINGLE-WALL / DOUBLE-WALL (con't) b. Cause: Steam valve(s) not fully opening Solution: Check steam pressure before and after steam valve. The pressure drop should not be more than half of the inlet pressure. Check valve for blockage. Check linkage for adjustment. Check modulating signal (if applicable). Check the supplied voltage to the valve coil. c. Cause: Piping flow restricted. Solution: Calculate the flow velocity and expected friction loss. If excessi
