Blower Pack - Nortec ES MK II Series Installation And Maintenance Manual

BLOWER PACK .
STEAM HOSE CONNECTION
1.
All built-on blower
pack~
are
lactory HUed with all
steam hose connections. No further
work.
Is
required.
2. Remote mounted blower packs require removal of
the bottol'll COV9rpiate to gain access to the Stilian1
manifold fltting$. Fe!i!d steam supply and conden-
sate f9tum hoses through appropriate holes In
bottom plata and
replace
bottom
plattt.
For steam
and ()(';n(lensate
hose
rouling, follow steps outlined
In l)team
8uJ)ply
hose routl1\9 section,
!'age 6.
ELECTRICAL CONNECT10N
. 1. Use 16 ga. or heavier wire for power connecllon
from tt.WJI1I!Ul1 block of blower pack to fuseltenTIlna!
block It'lsJde electrical section of numldlfler.
2. Use 16
gao
wiro to connect from ground clarop of
blower paek to ground
clamp
provided In tl'le
eltlCtrical cOr.lpartrmont of the
humidifier.
3. All field wiring shoUld be encased in
conduit and
COnform to :1atlonal and lOCal
building
codes.
PRIMARY
VOLTAGE
WIRING TO UNIT
1. Check and et'Isure
that
available VQltago and phase
corresponds with operating voltage and
ph~
of
iJolt.
2. Ensure tl'lat an adequate eef\lice Is aviidlable to
Cat!Y
full unit amperage drawn as specified by fusa size
on unit nameplate,
3. A fused disccnnect breaker
~mbly
should be
installed to protGCt unit and to provide corr.pl8te
system shutdown
during
periods of non·use.
4.
Recommended fuse size for disconnect 1$ stated
on unit nameplate and 1ft product catalogue.
5. COOTlect
cabloet grounti
terminal
to
ground. Do
NOT use neutral wire of fQurwlre supply as ground.
6.
Single pha5e lInlts INiY be run
On
3 phase power
but load may unbalaoce power grid.
1. Never use the neutral wlre of a 4
wlr~
system as a
power lead connection with thu exC41ptiOll of
'E7V
and
347\1 tapped
from 480V and 575V !'el.'pootlvely.
8. PoW$r leads are connected to thliJ primary terminal
blQi!k In the electrical section through the
knocl<outs provided in
the
bottom plate of
the
unit.
9.
Wiring sims shouid be In
accordance
vrith national
and loc;a\ eleotrlcal codes arm by·laws, unit elec.
trical Co<S$S aM by-laws.
9
CONTROLS
ON/OFF CONTROL
(ContfC)1 Wiring D100ram 2.3,1)
A, 6
a~c
C are to be
wired In series
(o:'Ily one path for
cu rrer;
t)
acrQS.S terminals 1 and 2 on tM
low
voltage con·
trol terminal strlp. or replaced wlth a jumper wire for con-
&tar.t cperat!on.
A - Control On/OH th,midlsta1
Wired to make on drop in humidity. breal( on
rise.
S - High L.lmit OnlOff
Humidistat
Wired ta make
0;'1
drop
In humidity, break on rise.
Set to a higher set point
(max.
85 1
/0
A.H.) as a safe-
ty to prevent
~aturatlon.
c
~
Alr.Proving OnlOff 5wttch
1.
2.
3.
4.
t'
:.I.
6.
W:red
to make wh8n sensing alt flow, break 1Aihen
no air flow.
As a safety Ie prevent saturation when no air flow.
Tne factery offers
vat10us versions
of
A,
B and C
t:> suit eaen applicatioo. In general. A 1$ essentlsJ
whereas B anti C are highly recomm~{\ded.
Field
wiring from humidistat to humidifier and bet-
ween de'l\ces should be 18 AWG Qr heavier and
sl"too!d not exceed 100 188t total length to
all<!
from
SiflGS
vQJtage loSS in tile humidifier
will
CIlUOO
re(juced power to primary contaotof holding coil
and the contacto( might not function. Measure the
v~ltage
acrcss the coli to ensure
It
1524 '1.2.0.
±
10%. If it is not, Consult factory.
Tha low voltage
17
point) contrel terminal strip Is
provided In the electrical compartment.
Tne
Inter·
nal 5!de is factory wired. The oxternal sldu Is to be
field wired unless the extern31
CCJntrol~
have
been
r..llblMt r.loonted at the factory.
Each unit is supplied wUh a wiring diagram
adhered
to the cabinet.
A
and
B: MOl)nt any wall Ill.lmidJstat (cQntrol or high
limit) over a standard electrical
box
at a height
similar to a typical thermostat. Any wall humidistat
ShCtjld
be In a
location mptcsentative of tM
overall
space bell\{j humidified and not In
th.
path of
il
blower
pack or an air su pply grille.
A!
Mount any duct control humidistat In a location
r~reseotativa
of the o\lerall air humidity. usually
the
retum
duot.
Do
not
mount
it
dlroot!y
in
frollt
of
the $team distributor
Of
In a turbulent or
mixing
u>oe. Mounl ;1 where the ai(s humldltv and