Clean The Boiler - PEERLESS SERIES 211A Installation, Operation & Maintenance Manual

PROBLEM
POSSIBLE CAUSE
SUGGESTED REMEDY
Main Gas Valve Opens
But No Gas Flows
Manual Valve Closed at Gas Train
Manual Va ve Closed at Metel
Test Firing Valve Closec if Provided
aden Valve
_I tH] valve
Ooen Valve
S_gs i_l 5iedrll l_ i_lll(l c_r _1_31 _317o jR pll Ci;rrt,L:[ Pl I) rig CulldltlOtl
Water Hammer on Start-Up
Concentric reducers caum_ g condensate pooling
Dr iJ [r_ _ falIt!(J c ose(
_)rv -e[urns we[reel [lue [o new DC er water line
nlgner [Ran OlC113o er
Correct R pmg
Reuldcu Tral3 or Trap Element
Correct P 31ng or Install Feed System and Traps
Concentric reduce/s caus ng conaerlsaI_ DOOIIDg
No drio ne on [ne oacK Sicle of a DaCK-DltChed
mo[orlzecl valve
Clogged returlls d g_avqly s.sTem
Correct P ping
nstall Dr 3 Line and Trap
C ean or Re PqJe Return Lme(s)
Water Hammer During Mid-Cycle
Water Hammer on Shut-Down
Hammering in the Boiler
No Heat or Poor Heat Distribution in
the Building
System or Boiler Overfilling or Flooding
Incorrect near DoHer piping causing WeT steam to
system
Trao failed aden allowing s[ean3 to enter return_
{Radiator Hammer} Large raalator map be vented
too QUICKIV
_ong nip[ e at Har#ora LO00
Correct PIpmg per Manual
qeDlace TraD or Trap Element
Use Smaller Air Vent or Use Two Sma Vents in
Place of One Large Vent One Mounted Higher
than the Other
Rec ace with Close Nipple
Water leg or back SlODe in return line to receiver
tanK, causing water pocketing
Trae instal efJ at recewer [aRK Causing Hater
trapping irl return
Boiler feed Duma or conaensate pump feed rate
too fast. causmg spraymg rata equalizer
No drio on the nlet side ofaforwara oEtcnea
]qotorlzed valve
unlnsulateo steam OlD he, causlf_g excessive
;onclensate 3aas
Close n=DDI8 or7 Hdrtford too nlgr
unlnsulatea steam piping _ ooHer room but
System piping nsula[ec causlr ] vacuum
corlclltlOn on ShUt-down
Poor c_rculat on in the ha ler due to sludge
eccutl/ulat oil
Correct Piping
Remove Trac at Tank. Installing Drip Traps and
Radiator TraPs where Required
Throttle Flow Rate
Add Dr a Lme and Trap
Insulate Steam Pipes
ReD De 2" to 4" Be ow Normal Water Line
nsulate Steam Pipes
Clean and 8 owdown the Boiler
Rapid Cycling
Main vents not working Replace Main Vents, Repiping away from End of
, Lines if Needed
Drip traps failed closed Replace Traps or Trap Elements
r
i Radiator traps failed open, allowing pressur zat on
of the returns _ Replace Traps or Trap Elements
Water legs or back slope in return lines to
receiver tank, preventing air from venting out Correct Piping
receiver vent
1
Boiler pressure too high, causing air vents to lock
up or blowing water Ioopseals
/
Reduce Operating Pressure
New boiler water content smafler than old boiler Install Boiler Feed System with Receiver Tank
Large Enough for Condensate
Boiler water feed rate or pump rate too fast, /
causing water level to collapse (due to collapse of
s earn bubbles in boiler wa er) [
Foaming, priming or surging due to poor water
quality
water quality, causing foaming and surging I
Poor
Excessive Water Level Bounce Incorrect near-boiler piping, such as undersized
or incorrectly placed risers
I Boiler water rate or pump rate too fast
feed
Air vents or traps not ventrng air, preventing
steam from getting to radiation and pressurizing
the air pocket
Pressure differential on pressure control too close
Nuisance outages of water level control due to
boiler water level bounce
Reduce Feed Rate
Clean the Boiler
I
Clean the Boiler
!
Pipe per Manual
Reduce Feed Rate
Replace Vents or Traps
Adjust Control Differential
See Excessive Water Level Bounce Above
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