TLV COS Series User Manual

8. Product Warranty
1) Warranty Period: one year after product delivery.
2) TLV CO., LTD. warrants this product to the original purchaser to be free from defective
materials and workmanship. Under this warranty, the product will be repaired or replaced at
our option, without charge for parts or labor.
3) This product warranty will not apply to cosmetic defects, nor to any product whose exterior
has been damaged or defaced; nor does it apply in the following cases:
1. Malfunction due to improper installation, use, handling, etc., by other than TLV CO., LTD.
authorized service representatives.
2. Malfunctions due to dirt, scale, rust, etc.
3. Malfunctions due to improper disassembly and reassembly, or inadequate inspection and
maintenance by other than TLV CO., LTD. authorized service representatives.
4. Malfunction due to disasters or forces of nature.
5. Accidents or malfunctions due to any other cause beyond the control of TLV CO., LTD.
4) Under no circumstances will TLV CO., LTD. be liable for consequential economic loss or
damage or consequential damage to property.
Troubleshooting Chart (continued)
Problem Symptom Cause Remedy
Secondary
pressure
cannot be
adjusted or
increases
abnormally
(continued)
Upon closing
secondary side
valves, secondary
pressure abruptly
rises as high as
primary pressure
The bypass valve is leaking Check, clean, and replace
with a new valve if necessary
Hunting or
chattering
occurs
Occurs at low
steam demand
COS/COSR is operated
below the lower flow rate limit
Check steam supply volume,
replace with smaller valve
Abnormal
noises
Makes a high-
pitched noise
There is a high-speed
open/close valve nearby
Install the valve as far away
as possible
The flow is too great Check the flow rate, use
a larger size valve
Reduction ratio is too high Use two-stage reduction
Faulty
steam trap
(COS only)
Steam is blowing There is dirt build-up on the
trap valve seat or at the
float base
Clean
No condensate is
discharged
The primary pressure
exceeds the trap valve seat
maximum working pressure
(exceeds operating
pressure range of COS)
Ensure COS is used within
the operating pressure
range
The body is installed tilted
Check the piping
The float is deformed
Check for water hammer;
replace with a new float
The trap valve seat is
clogged
Clean or replace with a new
trap valve seat
Piping vibration Secure the piping
Water is inside the float
Replace with a new float
The outlet piping is clogged Check the piping; clean
Chattering never
stops
Condensate is contained, or
the trap is blocked
Check the trap; check the
piping
The selected model is
inappropriate for the service
conditions (specifications)
Check the model selection,
replace the
COS/COSR if
necessary
The selected model is
inappropriate for the service
conditions (specifications)
Check the model selection,
replace the
COS/COSR if
necessary
Hunting never
stops
Reduction ratio is too high
(operated at below 10% of
the primary pressure)
Use a two-stage reduction
arrangement
The pilot valve seat or main
valve seat is damaged or
there is a build-up of dirt
Clean; align; replace if
necessary
English
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TLV COS Series Specifications

General

Brand	TLV
Model	COS Series
Category	Control Unit
Language	English