Bradford-White Corp UTW465S60FR*N, UTW450S60FR*N, U2TW50T*FRN, U2TW65T*FRN Blower Testing

Blower Testing

Blower Testing (cont’d)

Does blower	Y	Disconnect pres-	Connect manome-
energize within		sure switch tub-	ter to pressure tap
2 minutes?		ing from blower	of blower (see
		(see photo 3).	photo 3).

Remove exhaust

Disconnect ventadapter system from top of

blower and remove vent adapter (see photo 5).

N

3

Does blower energize after 2 minutes, run for 30 seconds and shut down?

N

Disconnect cord set in photo 9. Is there 115VAC across termi- nals shown in photo 11?

N

Is there

115VAC at wall outlet?

Y

Check power cord

for damage.

N

Replace blower.

Pressure tap.

4

Pressure

switch tubing

Y	See pressure	Determine volt-	N
	switch testing	age problem and
		correct.
	on page 25.
		6

Y	Is there	Y
	115VAC
	across termi-
	nals shown
	in photo 7?

N

Incorrect supply voltage polarity.

N	Determine	Replace cord	N
	power source
		set.
	problem and
	correct.

YRepair or replace

power cord.

5

With blower running and	Y
exhaust adapter removed	Blower OK.
from top of blower, is there
a negative pressure of –
2.15” to –2.30” W.C.
N
Is there 115VAC across blue	Y
	Replace blower.
and green wires (see photo 8).
7

Reconnect cord set shown in photo 4. Y Is there 115VAC

between blue wire Replace blower. and ground wire

(see photo 8).

N	Green ground	Blue wire
	wire

Does cord set have electrical continuity?

Y 8

Shown with pressure

Replace gasswitch removed control.

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