Raypak Xfiire 300B Installation And Operation Manual page 59

3. Open test point B and connect a rubber tube to it.
Connect the other end of the tube to a manometer
and look for a build-up of pressure. Increasing
pressure indicates a leaking gas valve which must
be replaced.
4. Next, close the upstream manual gas valve (field
supplied) and remove the manometers from the
bleedle valves in test point A and test point B.
Connect a rubber tube from the test point A bleedle
valve to the test point B bleedle valve and open the
upstream manual gas valve. Make sure that test
point A and B bleedle valves have been opened so
as to allow gas to flow. This will bring gas pressure
to the second valve seat.
5. Open the bleedle valve at test point C and connect
a second rubber tube to it. Connect the other end
of the tube to a manometer and look for a build-up
of pressure. Increasing pressure indicates a leaking
gas valve which must be replaced.
6. Remove rubber tube and manometers. Close each
bleedle valve as the tubes are removed.
7. After no leakage has been verified at all valve seats
and test valve, open downstream leak test valve and
restore electrical power to the heater.
TO BURNER
Figure 62. Leak Test Procedure
Post Start-Up Check
Check off steps as completed:
1. Verify that the heater and heat distribution units are
filled with water.
2. Open the caps on automatic air vent valves during
the venting procedure.
3. Verify that air has been purged from the system.
4. Verify that air has been purged from the gas piping,
and that the piping has been checked for leaks.
5. Confirm that the proper start-up procedures were
followed.
A
1ST SEAT
FIRING
VALVE
B
2ND SEAT
C
MANUAL
VALVE
6. Inspect burner to verify flame.
7. Test safety controls: test low water cut-off or
additional safety controls for operation as outlined
by manufacturer. Burner should be operating and
should go off when controls are tested. When safety
devices are restored, burners should re-ignite after
pre-purge time delay.
8. To test the fixed manual reset high limit built into the
PIM, first set DIP switch #8 on the PIM to the ON
position. This will activate a Commission Test Mode
which will turn on the amber Alarm/Test LED on
the PIM. The fixed high limit setting is temporarily
overridden to match the setpoint potentiometer
position on the PIM. The high limit can now be
adjusted by the potentiometer to assist in commission
testing and verification of high limit functionality. The
VERSA IC will allow one-time operation of the limit
and then must be returned to normal operation by
turning DIP switch #8 back to the OFF position.
Power to the unit must then be cycled off, then on to
return to normal operation.
9. Test ignition system safety device:
a. Close downstream manual gas valve. See
Figure 62. Turn power on.
b. Close Enable/Disable circuit to call for heat.
c. The burner should attempt three trials for ignition
for the standard model and then lock out. Single-
try ignition modules will try only once and then
lock out.
d. Open manual gas valve. Reset the ignition
control by pressing for one second and then
releasing the reset button adjacent the user
interface or at the PIM to clear the ignition fault.
10. To restart system, follow lighting instructions in the
Operation section.
11. Check to see that the high limit control is set above
the design temperature requirements of the system.
For multiple zones: Check to make sure the flow is
adjusted as required in each zone.
12. Check that the heater is cycled with the thermostat.
Raise the setting on the thermostat to the highest
setting and verify that the heater goes through the
normal start-up cycle. Reduce to the lowest setting
and verify that the heater goes off.
13. Observe several operating cycles for proper
operation.
14. Set the heater thermostat to desired temperature.
15. Review all instructions shipped with this heater with
owner or maintenance person, return to envelope
and give to owner or place the instructions inside
front panel on heater.
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