9
9. Temperature-Pressure Relief Valve discharge pipe - see T&P
Valve Discharge Pipe Requirements: on page 15.
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.
13. Supply gas line connection. See Gas Supply Systems on
page 13.
14. Low Gas Pressure switch, see description under beginning
on page 8. See Gas Pressure Requirements and Table
3 on page 11.
15. Vent Connection (Exhaust/Condensate Elbow) 3" Aluminum.
16. Spark Ignition Control. When energized, sends the electrical
current to the spark igniter.
SIDE VIEWS
1. Cleanout access panel, covers water heater cleanout
opening.
2. CCB enclosure - see item 3 on page 8 for description.
3. Intake air connection - 3 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, the control system’s LCD display and
operational buttons. Used to adjust various user settings and
view operational information. See Control System Operation
on page 44.
8. Temperature-Pressure Relief Valve. See Temperature-
Pressure Relief Valve on page 15.
LEFT SIDE
RIGHT SIDE
1
1
10
12
11
15
15
8
3
3
14
4
13
5
6
7
4
16
2
2
9
5
Figure 4
