Paloma PH2-20R DVSN, Engineering Handbook

Page: 146 / 172

10
Manifold System Installation
Section 4 - System Start Up
Once the tankless water heaters have been setup and remote con-
trol has been installed as instructed in Section 3, you may begin the
startup process.
If the manifold control system has been previously powered up, turn
off the power at the remote control
fi rst, then unplug or disconnect
the power supply from the manifold controller. If power is discon-
nected before the remote is turned off the system will retain any
previous errors and system status. Turning the remote off prior to
disconnecting the power supply will reset the system status.
Remove the front cover from the manifold controller; there are 4
(four) screws holding the front cover on to the unit.
Shutoff all water fl ow from the system.
Turn on the gas supply to the tankless water heaters.
Plug in or turn on the power supply to all the tankless water heaters.
Wait 30 seconds after the last unit has had the power turned on.
Plug in or turn on the power supply to the Manifold Controller
The remote control and diagnostic display on the main control board
inside the manifold control cabinet unit will begin to blink “dashes”,
see
fi gure on page 3. The dashes will appear while the system
is synchronizing with the tankless water heaters. Depending upon
the number of tankless water heaters connected to the system, this
synchronization can take up to 3 minutes. Once the system has syn-
chronized the remote control and diagnostic display will go blank.
An LED indicator will light up “solid” next to each connector where a
control cable is plugged in to the main control board and/or expan-
sion card. If the LED indicator next to a connector begins to blink or
does not light then an error has occurred with the communication to
the water heater. Check the diagnostic display for an error code and
recheck all connections. If an error occurs then the entire start up
process will need to be repeated.
Press the power button on the remote control, it should now display
the water temperature.
Turn on or start with a low hot water demand or fl ow. The burner on
indicator light on the remote should come on once the system has
started to
fi re and the diagnostic display on the control board will
show “on”.
Increase the hot water demand or fl ow to turn on additional units in
the system. Continue to increase the fl ow rate until all the units in
the system are running.
- 146 -