Addison UHA 150, Installation, Operation & Service Manual

Page: 53 / 62

SECTION 15: R
EPLACEMENT
P
ARTS
45 of 49
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 ca b le and w iring from b oard, noting their
positions. Release the fo u r mo u nting standoffs. Refit in reverse. Ens u re correct location of ignition ca b le
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 assem b led and b alanced
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 b ro 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