Friedrich WallMaster 2009 - Functional Components Overview; Component Types and Descriptions

F
U
N
C
TI
O
NAL
CO
MP
O
NENT
S
A. Mechanical com
p
onents
Drain pan valve
Tem
p
erature-sensitive valve that o
p
ens u
p
to drain off condensate water when the outside tem
p
erature falls below 40°F
and closes when the outside temperature reaches 60°F
Plenum assembly
y
D
i
ffuse
r with
d
ir
ec
ti
o
n
a
l l
ou
v
e
r
s used
t
o d
ir
ec
t th
e co
n
d
iti
o
n
ed a
ir
flo
w
.
Blo
w
e
r w
heel
Attaches to the indoor side o
f
the
f
an motor sha
f
t and is used
f
or distributin
g
unconditioned, room side air thou
g
h the heat
e
xchan
g
er and deliverin
g
conditioned air into the room
.
Slinger fan blade
g
Attaches to the outdoor side o
f
the
f
an motor sha
f
t and is used to move outside air throu
g
h the condenser coil, while
slin
g
in
g
condensate water out of the base pan and onto the condenser coil, thus lowerin
g
the temperature and pressures
within th
e co
il
.
B
.
El
ectr
i
ca
l
com
p
onent
s
Th
e
rm
os
t
at
U
sed to maintain the specifi ed room side comfort leve
l
System switch
y
U
sed to re
g
ulate the operation of the fan motor, the compressor or to turn the unit off. For troubleshootin
g
, refer to the
wirin
g
dia
g
rams and schematics in the back o
f
this service manual
.
Capacitor
p
R
educes line current and steadies the volta
g
e suppl
y
, while
g
reatl
y
improvin
g
the torque characteristics of the fan motor
and compressor motor.
MoneySaver
y
®
switch
®
When en
g
a
g
ed, it sends the power suppl
y
to the
f
an motor throu
g
h the thermostat, which allows
f
or a c
y
cle-
f
an operation
.
Fa
n
Mo
t
o
r
D
ual-sha
f
ted
f
an motor operates the indoor blower wheel and the condenser
f
an blade simultaneousl
y
.
So
l
e
n
o
i
d
U
sed to ener
g
ize the reversin
g
valve on all heat pump units.
Heating element
g
E
lectric resistance heater
Heat anticipator
p
U
se
d
to
p
rov
id
e
b
etter t
h
ermostat an
d
room a
i
r tem
p
erature contro
l
.
C. Hermetic com
p
onents
Compressor
p
M
otorized device used to compress re
f
ri
g
erant throu
g
h the sealed s
y
stem.
Reversing valve
g
A
f
our-wa
y
switchin
g
device used on all heat pump models to chan
g
e the
fl
ow o
f
re
f
ri
g
erant to permit heatin
g
or coolin
g
.
C
heck valv
e
A pressure-operated device used to direct the fl ow of refri
g
erant to the proper capillar
y
tube, durin
g
either the heatin
g
or
c
oolin
g
c
y
cle
.
Capillary tube
p y
A c
y
lindrical meter device used to evenl
y
distribute the
fl
ow o
f
re
f
ri
g
erant to the heat exchan
g
ers
(
coils.
)
8