Filter
Top Products
18
Technical Training Department
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
©2003
SBN SEQUENCE OF OPERATION
Sequence
1. Thermistors (probes) call for
heat.
2. Inducer fan starts and
provides draft.
3. Hot surface igniter = 20 sec.
warmup.
4. Main gas valve opens 4 sec.
trial for ignition. (Maximum 5
trials.)
5. Main burner ignites and
proves.
6. Thermistors reach the
temperature setting.
7. Main burners “OFF”
- Auto restart after 60 min.
- 20 sec blower “interpurge”
between trials
Top View
SBN Models Part No.
Pressure Setting To
Close Switch (Inches
W.C.)
366 194411-0
(
-
)
1.60 ± .10"
275 194411-1
(
-
)
2.00" ± .10"
310 194411-2
(
-
)
1,75" ± .10"
120, 199, 250,
400
194411-3 (-) 2.40" ± .10"
154, 180, 199 194411-4 (-) 2.60" ± .10"
Draft Proving (Pressure) Switch Table