PEERLESS PUREFIRE PF-850 - TEST HIGH LIMIT

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b. Press select and use the “” key to scroll down to
“High Power”.
c. The burner will ignite and, after a short
stabilization period, run at 100%.
3. Monitor the boiler temperature on the temperature
gauge (factory supplied for field mounting) and on the
Status display.
a. The boiler should shut down at the boiler setpoint
plus 9°F (5°C).
b. If it does not shut down turn off the boiler and
contact your PB Heat representative.
H. TEST HIGH LIMIT
Check that each burner will shut down when the high
limit circuit is open.
1. On the LCD display for the Dependent burner enter
the “Installer Menu” by pressing and holding the
“Select” & “Menu” keys simultaneously for 3 seconds.
a. Use the “” key to scroll down until the cursor
(➞) is at “System Test”.
b. Press select and use the “” key to scroll down to
“Low Power”.
c. The burner will ignite and, after a short
stabilization period, run at 1% modulation.
2. Disconnect the wire connection to the high limit (in the
lower right side header with red connector).
a. The burner should shut down immediately and
enter a lockout condition.
b. Press the reset button on the control to enable
normal operation.
c. If it does not shut down turn off the boiler and
contact your PB Heat representative.
3. Enter the Installer menu on the managing burner and
select, “System Test”.
a. Press select and use the “” key to scroll down to
“Low Power”.
b. The burner will ignite and, after a short
stabilization period, run at 1% modulation.
4. Disconnect the wire connection to the high limit (in
the upper right side header with red connector).
a. The burner should shut down immediately and
enter a lockout condition.
b. Press the reset button on the control to enable
normal operation.
c. If it does not shut down turn off the boiler and
contact your PB Heat representative.
5. Turn “System Test” to “Off” on both burner displays.
I. MULTIPLE BOILER SYSTEMS
1. Since all heat distribution circulating pumps
(CH/DHW) are connected to the master boiler, it may
be necessary to run one of these pumps to get
sufficient run time on the boiler for any of the
commissioning tests indicated in this section. To do
this, choose “System Test” from the “Installer Menu”
on the master boiler, managing burner display.
a. Use the “” and “” keys to select “Pump for
CH” or “Pump for DHW” from the “System Test”
menu.
b. Note that it is not necessary to operate these
pumps manually when running commissioning
tests on the master boiler. In fact, the master boiler
will automatically activate the CH pump terminals
when operating under system test.
2. If using common venting on multiple boiler systems,
be sure that the Alarm Mode (INSTALLER MENU ➞
Burner Settings ➞ Alarm Mode) is set to “Common
Venting” to prevent operation of any of the boilers
without monitoring the flapper valve closure switches.
Turn the power off to one of the boilers (in Standby)
in the system to be sure that the alarm sounds.
START-UP PROCEDURE