Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 4: START SEQUENCE
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 37 of 131
SECTION 4:
START SEQUENCE
The information in this section provides a guide to starting the CENTURION Water Heater using
the Edge Controller. It is imperative that the initial startup of this unit be performed by factory
trained personnel. Operation prior to initial startup by factory trained personnel may void the
equipment warranty. In addition, the following WARNINGS and CAUTIONS must be observed
at all times.
W A R N I N G !
All of the installation procedures in
Section 2:
Installation
must be completed before the initial
start-up of the unit.
This equipment must be serviced only by factory certified service technicians.
Do not attempt to dry fire the unit
. Starting the unit without a full water level may result in
injury to personnel or property damage and will void any warranty.
Initial startup of the unit
must be
performed by PVI factory trained personnel. Operation prior
to initial startup by factory trained personnel may void the equipment warranty. In addition,
the following WARNINGS and CAUTIONS must be observed at all times.
4.1 START SEQUENCE
When the Edge Controller Enable/Disable switch is set to the
Enable
position, it checks all pre-
purge safety switches to ensure they are closed. These switches include:
•
High Water Temperature switch
•
High Gas Pressure switch
•
Low Gas Pressure switch
•
Low Water Level switch
•
Safety Shut-Off Valve (SSOV) Proof of Closure (POC) switch
NOTE:
The
Blocked Inlet
and downstream
Blower Proof
switches are
not
checked prior to
starting the pre-purge.
If all of the above switches are closed, the READY light (above the Enable/Disable switch) will
light when the switch is in the
Enable
position and the unit will be in the STANDBY mode.
NOTE:
If any pre-purge safety device switches are open or required conditions are not
observed throughout the start sequence, appropriate fault messages will be displayed.
Start sequence when there is a demand for heat:
1.
The Controller’s green
DEMAND
LED status indicator will light.
2. The unit checks all five pre-purge safety switches listed above
. The Edge Controller’s
ignition sequence screen walks you through the ignition screens and demonstrates (or
highlights) which switches are not met. SSOV location is shown below.
