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VI.
STARTUP/SHUTDOWN INSTRUCTIONS
Refer to Flow Diagram in Section VII.
IMPORTANT! Sudden or rapid changes of pressure may damage dryer blower.
Use care in operating valves. Changes in pressure should not exceed 30 PSIG per
minute.
STARTUP INSTRUCTIONS:
A.
Leak Check
Open valves V2, V3, V4, and V5 for leak check – all other valves to be closed.
Slowly open inlet valve V1 to pressurize the dryer. Leak check the dryer assembly
with soap and water mixture checking for bubbles and repair any leaks resulting
from the shipping.
B.
Set Valves
Close valves V1, V3, V4, V6, V7, V8, V9, V11, V12, V13, and any instrument
valves which open to atmosphere.
Open valves V2, V5, and V10.
C.
Purge System
This procedure should be used whenever piping has been opened to atmosphere.
Repairing leaks, replacing filters or desiccant are maintenance operations where
the dryer assembly must be purged to remove air (that contains oxygen). Natural
gas tends to be lighter than air and will accumulate towards the top of closed
volumes. Purge procedure removes trapped air from various sections of dryer –
pre-filter, dryer vessel & after-filter, then regeneration loop.
1. Open valve V8 to purge the pre-filter housing "P" of air. Close when complete.
2. Open valve V9 to purge the dryer chamber and after-filter housing "A" of air.
Close when complete.
3. Slowly open V3 then open valves V12, and V13 to purge the heater, blower
housing, sump and separator. When complete open valve V4 and immediately
close V3. This allows the cooler and the remaining piping to be purged of air.
When complete, close valves V12 and V13. Once valves V12 and V13 have been
closed, fully open valve V3.
4. Close valve V4 to isolate the regeneration system, and slowly open valve V6 to
place the dryer into service.
5. Initial Start-up Note: New desiccant will initially adsorb mercaptans. To maintain
odorant at the dryer exit, slightly open bypass valve V7 during initial operation.
D.
Registration (first time only)
Registration is of paramount importance. PSB Industries desires to communicate
with its customers/end users throughout the life of this product. A requirement to
operate this unit is a 4 digit code that will be issued when registration process is
complete. The information listed in Product Registration form located in section
XVII will be asked for.
person being maintenance or facility manager. Once information is obtained, then
regen code will be issued. Code entry will be necessary for each regeneration.
Store in accessible location with the intent to prevent unauthorized used of dryer.
NG-SR IOM
Preferred information is end user/owner with contact
26
PSB INDUSTRIES
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