Raypak 300, 850 operating instructions Manifold Check, Finishing, Safety Inspection, Follow-Up

–0.5 in. WC from the reading recorded on the start-up checklist.

3.The desired combustion CO2 is between 8.5% and 9.0% for natural gas and 9.0% and 9.5% for propane with CO less than 150 ppm. Combustion should be checked at high and low fire (Max. and Min. fan speed) by using the service mode. Enter the service mode by pressing the UP arrow key and ENTER/MENU key simultaneously for 1 sec- ond. Set the fan speed using the UP and DOWN arrow keys.

Manifold Check

1.Check manifold gas pressure at the manifold pres- sure tap (connection “D” in Fig. 35). This pressure should read per the values in Table S for natural and propane gas.

2.If the pressure reading differs by more than ± 0.2 in. WC, STOP – Call the factory for directions on what to do next!

Model	Air Pressure	Setting
	Setting (in. WC)	Tolerance
300	-0.1	± 0.2 in. WC
500	-0.2	± 0.2 in. WC
850	-0.3	± 0.2 in. WC
Table Q: XFyre Intake Air Pressure Settings (High Fire)

Model	High Fire	Ignition	Low Fire
300	5000	3000	1500
500	7600	3000	1750
850	5500	3000	1500
	Table R: XFyre Fan Speed Settings

Model	Manifold Pressure (in. WC)
	Natural Gas		Propane Gas
No.	High	Low	High	Low
300	-0.2	-0.1	-0.2	-0.1
500	-0.3	-0.1	-0.3	-0.1
850	-3.2	-0.2	-2.7	-0.1

NOTE: Manifold pressures should be ±0.3 in. WC.

Table S: XFyre Manifold Pressure Settings

CAUTION: Special manifold and air settings may be required.

Finishing

1.Record all data on the “Start-up Checklist” located at the back of this manual.

2.Disconnect the manometers and reconnect the cap on the air intake and reinsert or close the seal- ing screws into the bleedle valves.

3.Start-up is complete and the boiler should be oper- ating properly.

Safety Inspection

1.Check all thermostats and high limit settings.

2.During the following safety checks leave manome- ters hooked up, check and record.

3.If other gas-fired appliances in the room are on the same gas main, check all pressures on the XFyre with all other equipment running.

4.Check thermostats for ON-OFF operation.

5.Check high limits for ON-OFF operation.

6.While in operation, check flow switch operation.

7.Check the low gas pressure switch (if provided). (For proper adjustment, use the attached manometers, if available, to set pressure. The scales on the switch are approximate only.) Low gas pressure switch (if provided) must be set at 3.0 in. WC for natural gas and propane gas.

8.Make sure that the high gas pressure switch (op- tional) is set to 3.0 in. WC for both natural gas and propane gas.

Follow-Up

Safety checks must be recorded as performed. Turn boiler on. After main burner ignition:

1.Check manometer for proper readings. Specifically note the change in air intake pressure. Replace the filter if necessary. (Refer to Table Q.)

2.Cycle unit several times and re-check readings.

3.Remove all manometers and replace caps and screws.

4.Check for gas leaks one more time.

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