Service Instructions; General; Motor And Fan Wheel; Air Proving Switch - L.B. White Premier TS170 Owner's Manual And Instructions

WARNING
B B u u r r n n H H a a z z a a r r d d
■
Heater surfaces are hot for a period of time after the
heater has been shut down.
■
Allow the heater to cool before performing service,
maintenance, or cleaning.
■
Failure to follow this warning will result in burns
causing injury.
WARNING
F F i i r r e e a a n n d d E E x x p p l l o o s s i i o o n n H H a a z z a a r r d d
■
Do not disassemble or attempt to repair any heater
components or gas train components.
■
All component parts must be replaced if defects are
found.
■
Failure to follow this warning will result in fire or
explosions, causing property damage, injury, or death.
1. Open louvered access panel opposite burner end of
heate. Disconnect motor leads.
2. Remove screws securing motor mounting plate to
housing.
3. Pull fan and motor assembly from housing.
4. Loosen set screws on fan wheel.
5. Pull fan wheel from motor shaft.
6. Remove the four nuts securing motor to mounting
plate.
1. Open louvered case access panel.
2. Remove two sheet metal screws holding air proving
switch blower housing. Remove assembly by turning
switch assembly 90 degrees so the switch paddle
can be pulled through oblong hole on side of fan
housing. See Fig. 16.
3. Disconnect the leads from the air proving switch.
4. When installing replacement switch, use care in not
bending the switch arm, otherwise ignition problems
may occur.

Service Instructions

1. Close the fuel supply valve to the heater and
disconnect the electrical supply before servicing
unless necessary for your service procedure.
2. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
3. After servicing, start the heater to ensure proper
operation and check for gas leaks.
4. Clean the heater's orifice with compressed air or a
soft, dry rag. Do not use files, drills, broaches, etc. to
clean the orifice hole. Doing so may enlarge the hole,
causing combustion or ignition problems. Replace
the orifice if it cannot be cleaned properly.

MOTOR AND FAN WHEEL

FIG. 15
MOTOR MOUNT PLATE
MOTOR
Premier 80
Premier 170
FIG. 16
SWITCH W/ PADDLE
HOUSING SIDE
PANEL
LEADS

GENERAL

FAN WHEEL
CLEARANCE
3/16 in.
1/8 in.

AIR PROVING SWITCH

NUTS
PADDLE
OBLONG HOLE
16