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4
5
16
2
1
LEFT SIDE
SIDE VIEWS
1. Cleanout access panel, covers water heater cleanout opening
and ASME plate where applicable.
2. CCB enclosure - see item 3 in
(page 8) for description.
3. Intake air connection - three-inch PVC.
4. Water heater 24-volt gas valve.
5. Combustion Blower.
6. Water outlet - 1 1/2" NPT connection.
7. UIM (user interface module). The UIM includes the display circuit
board and the control system's LCD Touch Display. Used to
adjust various user settings and view operational information.
See
Control System Operation
8. Temperature-Pressure Relief Valve. See
(page 15).
Relief Valve
9. Temperature-Pressure Relief Valve discharge pipe - see
Valve Discharge Pipe Requirements
10. Lower Temperature Probe, 1 of 2 temperature probes. The water
heater's control system monitors this probe to detect water
temperature in the lower portion of the storage tank.
11. Water inlet - 1 1/2" NPT connection.
12. Water heater drain valve.
3
6
10
Figure 4. Left-Side and Right-Side Components
Components- Top View (All Models)
(page 45).
Temperature-Pressure
(page 15)
2
7
8
9
15
1
11
12
RIGHT SIDE
13. Supply gas line connection. See
13).
14. Low Gas Pressure switch, see item 9 in
(page 8) for a description. See the gas pressure
(All Models)
requirements listed in
15. Vent Connection (Exhaust/Condensate Elbow) three-inch
aluminum.
16. Spark Ignition Transformer. When energized, sends the
electrical current to the spark igniter.
T&P
9
5
4
13
14
3
15
Gas Supply Systems
Components- Top View
(page 11).
Table 4
(page
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