SECTION 15: R
EPLACEMENT
P
ARTS
45 of 51
15.7 Pressure Switch
P
u
ll off 3
w
ay connector. Spring open plastic clips of mo
u
nting cradle. Replace
w
ith correct type of
press
u
re s
w
itch for model. The press
u
re s
w
itches are color coded for each press
u
re setting.
Carry o
u
t a start-
u
p after
w
orking on or changing a press
u
re s
w
itch.
See Page 27, Section 11
.
15.
8
I
g
nition Control
The control mo
u
nts to the electrical plate. P
u
ll o
u
t ignition cable and
w
iring from board, noting their
positions. Release the fo
u
r mo
u
nting standoffs. Refit in reverse. Ens
u
re correct location of ignition cable
and all other
w
iring.
15.9 Axial Fan/Guard/Motor Assembly
The axial fan
u
nit for the heater is s
u
pplied completely assembled and balanced
MODEL
UHA[X][S]
150 - 175
UHA[X][S]
200 - 225
UHA[X][S]
250
UHA[X][S]
300 - 350
UHA[X][S]
400
Pressure Switch
Kit P/N
90439802
90439808
90439803
90439807
90439808
Color Code
yello
w
orange
gray
bro
w
n
orange
Set Point in.
w
.c.
.32
.79
.41
.68
.79
Press
u
re S
w
itch Snap
Ring P/N
90439850
90439850
90439850
90439850
90439850
MODEL
UHA[X][S] 150 - 175
UHA[X][S] 200- 250
UHA[X][S] 300 - 400
Axial Fan G
u
ard
91901104
91901104
91901105
Axial Fan Motor
90600107
90600107
90600106
Axial Fan Blade
90709006
90709006
90709005