Perma Pure GASS-2040 - Manual (Page 29)

29 GASS-2040 User Manual | Original Instructions
APPENDIX E
1. Z-Purge Operation
With the inert gas supply connected, enclosure power deenergized and alarm system (if utilized).
Follow steps to purge system:
1. Carefully read Start-Up Instruction Nameplate on system.
2. Check operation of the Enclosure Protection Vent (EPV-1, if utilized), opening it manually several
times (see helpful hints below)
3. Seal protected enclosures.
4. Open Enclosure Pressure Control Regulator, but turning CW, to set Enclosure Pressure
Indicator at “Safe” pressure.
5. Ensure the Protection System Enclosure Pressure Indicator maintains a “Safe” pressure for one
minute.
6. Standby for exchange time as specified on the Instruction Nameplate, then energize the
protected enclosure power.
7. Ensure the Enclosure Pressure Indicator maintains a “Safe” pressure before leaving system
unattended.
2. Troubleshooting
P ro b le m o r F a u lt P o s s ib le C a u s e s C o rre c tiv e A c t io n
E n c lo s u r e p r e s s u r e c o n tro l
r e g u la to r w ill n o t h o ld a
s a fe p r e s s u re . L e a k a g e a ro u n d g a sk e tin g ,
c o v e r s , s e a m s , p ip in g a n d
tu b in g c o n n e c tio n s , c o n d u it
c o n n e c tio n s a n d e le c tr ic a l
c o n d u it s e a l o f th e
e n c lo s u re . T ig h te n e n c lo s u re la tc h e s :
s ilic o n e s e a la n t c a n b e
a p p lie d fro m in s id e th e
p ro te c te d e n c lo s u re w h e re
tig h te n in g is n o t fe a sib le .
E n c lo s u r e p r e s s u r e
in d ic a to r re a d in g is d iffic u lt
to sta b iliz e . In s u ffic ie n t e n c lo s u re
le a k a g e or o p e n in g o f th e
ve n tu re o rific e is c rim p e d
to o sm a ll. R e m o ve th e o r ific e , c u t o ff
c r im p e d en d a n d r e a m
tu b e , th e n re c r im p a n d
r e in s ta ll tu b e . A s tu b e is
s h o r te n e d , s e n s itiv ity
d e c r e a s e s a llo w in g e a s ie r
s e tp o in t o n th e e n c lo s u re
E n c lo s u r e P r e s s u r e
In d ic a to r “D rifts ” u p o r d o w n
fr o m th e “S a fe ” p re ss u re
s e ttin g . A p p lic a tio n in vo lv e s a
s m a ll, tig h tly s e a le d
e n c lo s u re a n d /o r a
flu ctu a tin g p ro te c tive g a s
s u p p ly . P re -r e g u la te g a s s u p p ly
u p s tr e a m o f th e e n c lo s u re
p ro te c tio n s y s te m to 5 p s i
m a x im u m
E n c lo s u r e p r e s s u r e lo s s
a la r m s w itc h d o e s n o t
a p p e a r to b e o p e ra tin g . P r e s s u re s w itc h is o u t o f
c a lib ra tio n . C a lib r a te b y s lo w ly
a d ju s tin g c o u n te rc lo c k w is e
to d e c r e a se s e tp o in t a n d
c lo c k w is e to in cr e a s e
s e tp o in t.
3. Helpful Hints
- The term “Safe” pressure for purposes of this manual is defined as follows:
Class I = a minimum 0.25 inch of water column pressure.
Class II = a minimum 1.0 inch of water column pressure.
- Regulator may be in the locked position upon arrival. To adjust regulator, pull handle to outward position.
- To test the vent’s operation, gently prod the vent flapper open with a soft pointed object (i.e. eraser end
of pencil) ensuring that the vent works freely.