OMM-0153_E
• 5/11/2023 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 31 of 124
CENTURION Installation, Operation & Maintenance Manual
SECTION 2: INSTALLATION
Figure 2-18: Sequencing Valve Installation
2.14 Water Heater Pump Relay
The Centurion
’s power panel includes a secondary output board with a pump relay designed to
operate a Water Heater pump. This relay provides 120 VAC with a maximum pilot duty of 3
amps. If the pump power requirement under all conditions is greater than 3 amps, it is required
to use this relay to activate the pump through an intermediate relay with a higher power.
Figure 2-19: Water Heater Pump Relay
The Pump Off Delay feature allows the user to keep the pump running for up to 30 minutes after
the Water Heater has shut down and the demand is satisfied. To enable this feature, go to
Main Menu
→
Advanced Setup
→
Ancillary Devices
→
Relay
and set
the
Pump Off Delay
parameter to the number of minutes the pump will continue to pump after demand is satisfied.
2.15 Next Steps
Once the unit is physically installed per the instructions above, start the unit for the first time and
perform the combustion calibration procedure. See
SECTION 5: INITIAL START-UP.
Sequencing
Isolation
Valve