VR8105, VR8205, AND VR8305 DIRECT IGNITION COMBINATION GAS CONTROLS
4. | With main burner operating, check the gas control |
| a. Remove the pressure regulator adjustment cap | ||||||||||
| flow rate using the meter clocking method or check |
| (Fig. 6). |
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| pressure using a manometer connected to the | Using a screwdriver, turn the inner adjustment screw for | |||||||||||
5. | outlet pressure tap on the gas control. See Fig. 6. | LO pressure clockwise |
| to increase or | |||||||||
If necessary, adjust the high pressure regulator to | counterclockwise |
| to decrease the gas pressure | ||||||||||
| match the appliance rating. See Tables 8 and 9 for | to the burner. |
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| 10. | Once high and low pressure have been checked | |||||||||||
| range. |
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| and adjusted, replace pressure regulator | ||||||
| a. Remove the pressure regulator adjustment cap |
| adjustment cap. If the desired outlet pressure or | ||||||||||
| (Fig. 6). |
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| flow rate cannot be achieved by adjusting the gas | |||||||
Using a screwdriver, turn the inner adjustment screw for |
| control, check the control inlet pressure using a | |||||||||||
HI pressure clockwise |
| to increase or |
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| manometer at the inlet pressure tap of the control. | ||||||||
counterclockwise | to decrease the gas pressure |
| If the inlet pressure is in the nominal range (see | ||||||||||
to the burner. |
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| Tables 8 and 9), replace the gas control. | |||||||
6. | After high pressure has been checked, check low |
| Otherwise, take the necessary steps to provide | ||||||||||
| pressure regulation. |
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| proper gas pressure to the control. | |||||||||
| operating sequences vary. Consult the appliance |
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| manufacturers instructions for the specific |
| Check Safety Lockout | ||||||||||
| operating sequence and regulator adjustment | ||||||||||||
| procedure for the appliance in which the control is | Controls Only) |
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| installed and for instructions on how to prevent the | 1. | With the system power off and the thermostat set | ||||||||||
| control from moving to high stage while checking | ||||||||||||
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| to call for heat, manually shut off the gas supply. | |||||||||||
| the low pressure regulator setting. |
| 2. | ||||||||||
7. |
| Energize ignition control and start timing safety | |||||||||||
Check the low rate manifold pressure listed on the | |||||||||||||
| lockout time. When spark ignition terminates, stop | ||||||||||||
| appliance nameplate. Gas control low rate outlet |
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| timing. |
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| pressure should match this rating. |
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8. |
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| When using the VR8105H, VR8205H and | ||||||||||
With main burner operating, check the gas control |
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| VR8305H | ||||||||||||
| flow rate as before (using the meter clocking |
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| ignition control safety lockout time must exceed 8.5 | |||||||||||
| method or check pressure using a manometer |
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| seconds for the system to function properly. | |||||||||||
| connected to the outlet pressure tap on the | 3. | |||||||||||
| After spark cutoff, manually reopen the gas control | ||||||||||||
| control). |
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9. |
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| knob. No gas should flow to the main burner. | |||||||
If necessary, adjust the low pressure regulator to | 4. | ||||||||||||
Reset the system by adjusting the thermostat | |||||||||||||
| match the appliance rating. See Tables 8 and 9 for | ||||||||||||
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| below room temperature, wait 30 seconds, and | |||||||||||
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| then move the thermostat setting up to call for | |||||||||||
| range. |
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| heat. Normal ignition should occur. | |||||||
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| Table 8. Pressure Regulator Specification Pressures (in. wc). | ||||||||||
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| Factory Set Nominal Outlet |
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| Type of |
| Nominal Inlet |
| Pressure |
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| Setting Range |
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Model Type | Gas |
| Pressure Range | Step |
| Full Rate | Step |
| Full Rate |
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Standard, | NAT |
| — |
| 3.5 | — |
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Slow |
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| LP |
| — |
| 10.0 | — |
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Step |
| NAT |
| 0.9 |
| 3.5 | None |
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| LP |
| 2.2 |
| 10.0 | None |
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NAT |
| — |
| 1.7 Low | — |
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| 3.5 High |
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| LP |
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| 4.9 Low | — |
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| 10.0 High |
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aLow Fire setting range for VR8305Q 1/2 in. by 1/2 in. and 1/2 in. by 3/4 in. is 1.5 to 3.0 in. wc.
9 |