Blower Speed Control Suf 199 And 250 - State Water Heaters SUF 130 300 Service Handbook

ULTRAFORCE COMMERCIAL GAS WATER HEATER

BLOWER SPEED CONTROL SUF 199 AND 250

The i nput of the SUF 199 and SUF 250 is
determined by the blower. The input of the
water heater may be determined by clocking
the meter as shown on page 5 or by making
sure the b lower i s rece iving the pro per Hz
signal. The blower rpm is controlled by the
Central Control Board (CCB). The signal to
the blower may be measured by attaching a
MULTIMETER that has a Hertz (Hz) setting
as shown in the illustration to the right. If the
Hz signal is within +/
Model Hz
199 N 133
250 N 133
199 LP 200
250 LP 266
Note: R emoving the
illustration will cause the blower to accelerate
and the input of the water heater to increase
to a much higher rate.
State Water Heaters – Technical Training Department 32
SUF 120 thru 400 SERVICE HANDBOOK
Hz
87
87
156
96
plug show n in the
Servicing should only be performed by a Qualified Service Agent
Meter black lead is connected to ground (not
shown) and the red lead is connected to an
open te rminal o n bl ower spee d con trol
connection.
Ashland City, Tennessee © 2009
Meter red probe
connected to
open terminal on
plug
198152-002