Troubleshooting - Symptom, Cause And Action - CARNES HBGH Installation, Operation And Maintenance Manual

TROUBLE SHOOTING - SYMPTOM, CAUSE AND ACTION -
SYMPTOM
Arcing
"Service" indicator on
Water doesn't fill
into cylinder (gray fill
valve indicator)
Water doesn't fill
into cyclinder (green fill)
valve indicator)
Humidifier drains
continuously
Water in duct or spitting
from distributor pipe
CAUSE
*Naturally very high conductivity water.
*Drain lines restricted causing low water levels.
*Defective drain solenoid valve.
*Insufficient flow of incoming water. Levels low.
*High back pressure in steam line.
*Excessive lengths of steam hose and/or
high static pressure.
*Attempted cleaning of cylinder by flushing or
banging producing flakes causing restricted
lines.
*Various.
*All 4 basic control signals not satisfied.
*Fill valve strainer is restricted.
* Fill valve is defective.
*24 Volts AC not coming from circuit board.
*Piece of mineral is partially blocking drain so
it will not close properly.
*Drain plunger is worn out, preventing drain
valve from closing completely.
*Steam hose & condensate return hose do not
have a continuous slope. Condensate
accumulates and gets pushed out distributor.
*Condensate return is blocked, kinked and
prevents proper drainage of condensate
water and accumulates in distributor pipe
and pushed out into duct.
*Distributor pipe not installed properly or
manufactured properly, not allowing for a
continuous backward slope to steam hose and
condensate hose connection.
*If condensate return hose has a drop less then
12".
*Condensate return is connected to top of unit,
but a trap was installed too close to elbow,
split, turning vane, grille or diffuser.
ACTION
*Water may be too high in conductivity. Test water.
*Inspect & clean drain & tubing regularly.
*Repair, clean or replace as necessary.
*Maintain 20 psi or above. Clean strainer, repair,
clean or replace fill solenoid as necessary.
*Check kinks or severe bends in steam hose.
Check system static pressure.
*Shorten distance between humidifier & dispersion,
maintain proper incline in steam hose, eliminate as
many 90° or 45° bends, insulate steam line as
necessary.
*Do not use solutions to clean cylinders, dispose
as necessary. Solutions could cause chemical
reactions not conducive to good operation.
*See "Service Required" page for more information
regarding the problem.
*Make sure all control circuits are closed and the
humidifier is 'On'.
*Remove strainer from fill valve assembly and
clean.
*Repair or replace as necessary.
*Consult factory, replace circuit board.
*Cycle drain. If it does not clear, clean as
necessary.
*Repair or replace as necessary.
*Improve routing of all hoses and/or install
condensate drains as necessary. Add a trap in the
steam hose in front of the distributor.
*Eliminate restriction in hose and routes as
required for proper flow of condensate water.
*Re-assemble, repair or replace as necessary.
*Route the condensate return to a common drain
and include a trap.
*Whenever condensate hose is returned to top of
unit a trap is not required, remove it. Distributor
pipe must be a minimum of 6 ft. upstream from
elbows, grilles, etc. If temp. in duct is 60°F or lower
the distance should be 10 ft. If distance, as
mentioned, is not possible, a drain pan may be
required. If the air in the duct can not hold the
volume of steam, the only recourse is to reduce the
maximum output of the unit. If very short
absorption distances are required, a short
absorption manifold can be installed.
28
Table 6