Leslie Controls NYC Heat Exchanger - Manual (Page 17)

Page 17 of 25
Valve Listing and Functions (refer to assembly drawing for particular size heater)
Item No.
ON OFF
15 Flow diverter, primary flow to Pump 1, no flow to
pump 2 No flow to pump 1, flow to pump 2
16 Emergency pressure relief, flow to drain No flow to drain
37 Hand Op Ball, re-circulation water to Cold inlet
water No re-circulation water to Cold inlet
water
39 Gain Adjuster Valves Adjust cold water flow to insure constant
temperature over the range of flow.
41 Hand Op. Ball, Supply cold water to blend valve Shut off cold water to blend valve
42 Blend Valve, 150 F, Blending Water No blending of water
43 Blend Valve, 130 F, Blending Water No blending of water
46 Check Valve, no back flow of hot water from heat
exchanger N/A
47 Solenoid Valve, Hot water to second blend valve No hot water to second blend valve
59 Gate valve, Supply steam Shut off steam supply
68 Hand Op Ball, Bypass condensate cooler Flow through condensate cooler
76 Gate valve, flow of condensate to drain No flow of condensate to drain
78 Needle valve, Steam to gauge and pressure sensor Shut of steam for maintenance of gauge
101 Condensate Diverter, Condensate through Cooler Condensate to drain and bypass
Condensate Cooler in fail mode.
TROUBLESHOOTING
Condition Possible Cause Fix
No Steam/Low Steam Adjust steam regulator.
Blocked tubes in heat exchanger Flush Heat exchanger.
Drain valves from steam traps are shut Open drain valves.
Condensate drain line is blocked or valves are turned off Clear line and turn on valves.
Solenoid is tripped Turn on Manual switches “H-1” and
H-2”
Blend valve element defective Test blend valve element and replace if
necessary.
No Hot water
Over temperature condition was reached and Thermo Switches
are still engaged. Find out why over temperature
happened and let Thermo Switches
reset.
Shut of the Gain adjusters Cold water main from street is shut off.
Reset Gain Valves (39)
Steam pressure above 15 psi Steam adjust steam pressure or fix
steam regulator.
Steam Traps broken and steam is being sent to the condensate
cooler Fix Steam traps.
System
Tripped
Blend valve element defective. Test blend valve element and replace if
necessary.