Maintenance - York D1SV300 Installation Instructions Manual

9
10.
Il.
la
The Icrckou[ctrcults mcntloned fiboveWIII n ot be
er]erg]led
during normal opera( ion bccausc they have a h@r rcs[sttincc
The flow of clectrlclt y wrll norrnalty follow the pa[tl of
least rcststancc through [hc compressor contactor~ I
M and
2M. 11,
however. ~ low or high pressure cu [out upcns, [hc
lockout reltiy 10R ur I I R WIII bc cnetgvcd. S]nce tile volt-
age across 10R or I 1R will exceed I WV, the vOI t+y ucrt)js
I M or 2M WIII be too low to pull
rn the contractors The
nor-
mally closed con tticts of' 10R
or 1JR wrll open the clrcult In
serie$ wlt h Ihc low or high pressure cutout.
When Ihcsc ~on-
tacts sutomat IcullyCIOSC. the lockout
crrcu] t c~n be rcwt by
mtcrru p[lng t hc p(lwcr to the unit.
TWLI adv~ntages are gained by thl~ circuit:
a. prevents rirpld cycling of the compressors which LJn be
LftimJglng
b. Ttw
alternate usc
of manual reset cutoffs avotds the prt)-
bicm above bu[ may
rcqu[rc an
cxpcnslvc serv]ce call (o
reset these corrt rolj.
Free/c~tot
.3T11senses the su~tlon temperature 01 [he No I
~ystcrn IIId WIli shu I down
Lmprcssor(s) when IIIIS [cm-
pcrature drop~ to 32
'F. It will reset autcrrnat[caily at 37'F.
The
supply tilr flow must
be
prcrvcn by vacuum switch 5LP
In
the
event the belts on the supply air motor break C)I the
WIpply alr motor shoulcf bc
rlc-encrgl/ed by lt~ overload pr<)-
tector~, 5 LP wrll open and
interrupt the cooling. heatlllg
and eccrnomrzer control c ]rcults.
This assures that the \ ar IOUS
modes of operat Ion do not cent mue without proper air tlow
The
compressor rncrtor protcctcrr(s). 1
!vlP, 2MP WIII
in(crrupt
the conl~;ressorcontrol "circuitwhen sensingan ovcrlotid co'n-
ditton. Also an anti-recycle tlrncr IS part of this Lfcvlce 10 pre-
13
l-l
vent
the comprc~w~r f mm rapid uycl Ing. T hc cwmprcssor will
stay
off
for five m]nutes. I t alw monltcrrs the vol tagc of the
I zo volt control crrcuit and WIII shut down the compressor lt
the
voltage drops
below 85 + 4.5 volts.
011 preswrrc control swl[chcs arc mstallcd In the cwnlptc~wr -
circuits. These
assure that adequate otl pressure IS prcwnt t o
! ubriCa[e thC I]]ov[ng
parts L)lthe
compressor. I ~ pre$$urc! IS
no[ adeq ua tc, Ihc sw Itch opens hut t Ing down the COIIIprewr.
It lt manually reset.
When the putnpdown acccsx)r~. Model 2PD04700 101. I\
installed, the co
rnpre$w)r will IJ)nt Inuc to opcrat c through
~t)llta ct 12TR-2
after the r[x)rn thcrm[) SIat
or cent rol]el
IS
wt Isfle d.
Solenoid 3S0 L In the IlquIrl Ilne I; now cI()~ecl
and the ~{1 n lpre~~or pumps most of the rcfrigcra nt OU t of"
the ev:iportitor" to the h~gh side <)ftbc ~ys~cn), TIIe ~>stcm
su~(]on pre~sure dt op~ untl] the low pre~sure
cutoff ( 1LP)
IIpens, This wit I
Sh U[
d{)wn the co mprcs~t)r and r.fc-cner-
,gI/c> the 12TR ICIJ} wbIch opcn~ 12TR-2 to put the opet-
atlon of the ~omprcw)r under the contr 01 of tl~c 1R rcla}
41s{) present ISJ 12TR- 1 cent.ict which IS clowd when the
\ySte Jn 1$
off
J lld prOV]de S 2
b} pdss cu cU1[to aI]()~'(,011 [8~'-
tor~ 1kl ~nd 2M to bc uctr; Jtcd In the event the kIw pIcJ-
>UIc CU10 ut
hti~ not rc$ct. }f'rthout t hls pu mpdowrn clrcult,
It IS powble to h~~e t hc 011presu rc swlt cl] ( OP/PS) open
~)n Ilgh[ lo~d tind short c} CICof the corn prc~~or. Rcfr]gcr -
ant tloods" b~ck (<)(he co
rnpr cs~{~r 011 C,Icl) Start -UII, fo,~n~s
the UII m the compressor crtinkcasc find purnpj t bc 011 to
the wndensatc COII.
The
run t]rncs are too short to
br Ing
the 011b~uk to the comprei~[)r w) that m ent UUI1} the 011
pressure switch open>. This rcqult e~ re-settmg m~nually
at the unit,
-
FILTERS
The falters must bc replaced JS often JS necess;)r} to ti~sute
good ~lr flow ~nd frltcrlng ~ctwn.
Refer to
FIguI e 1 fur filter access loc~tron"
COILS
Do not Jllow dirt to accurnuldte on the
et,apor~tor and W)II-
denser cod or other parts of the e;apordtor
:ind condenser
urcult. Clean JS often tis necessary to JSSUI e good system
performance. Use a brush, vacuum cleaner att~c}~ment 01
other suit able Means
REFRIGERANT CHARGE R-22
MAINTENANCE
LUBRICATION
The
bc,]rlngs for r.hc blower dltift and the blower motor" arc
not permanently lubricated.
They do require periodic lub -
ricatmn.
BELTS
Maintain belt tcn~l<)n to cxtcncf belt Ilfc. Replace when ~igns
of fal I
U]e beg]n to o ppca r.
DRAIN PAN
D. SV300
D. SV360 D.SV480
The dr:iln pJn dmuld be mspe~ted rcgultirl} to Jssure propet
36 lbs,. O ()/. 40 Ibs., 8 ()/.
~~)]b},, 8 ()/.
CdCh SJ'\t CH]
drtimage.
Subpct to change wtthoutnot$ce Pnnied m U 5A
CPC 1 M 990 1.20
Code: SBY
Central
530,25-N2Y
Peat Otfice York
Environmental
~X 1592 Pennsylvania
Systems
17405-1592
VORK. -
Heating
and Air Conditioning