Check Safety Lockout (Slow-Opening Controls Only) - Honeywell VR8205 Installation Instructions Manual

5. If necessary, adjust the high pressure regulator to
match the appliance rating. See Tables 8 and 9 for
factory-set nominal outlet pressure and adjustment
range.
a. Remove the pressure regulator adjustment cap
(Fig. 6).
b. Using a screwdriver, turn the inner adjustment
screw for HI pressure clockwise
increase or counterclockwise
the gas pressure to the burner.
6. After high pressure has been checked, check low
pressure regulation. Two-stage appliance operating
sequences vary. Consult the appliance
manufacturer instructions for the specific operating
sequence and regulator adjustment procedure for
the appliance in which the control is installed and
for instructions on how to prevent the control from
moving to high stage while checking the low
pressure regulator setting.
7. check the low rate manifold pressure listed on the
appliance nameplate. Gas control low rate outlet
pressure should match this rating.
8. With main burner operating, check the gas control
flow rate as before (using the meter clocking
method or check pressure using a manometer
connected to the outlet pressure tap on the control).
9. If necessary, adjust the low pressure regulator to
match the appliance rating. See Tables 8 and 9 for
factory-set nominal outlet pressure and adjustment
range.
a. Remove the pressure regulator adjustment cap
(Fig. 6).
b. Using a screwdriver, turn the inner adjustment
screw for LO pressure clockwise
increase or counterclockwise
decrease the gas pressure to the burner.
Model Type Type of Gas
Standard, Slow NAT
LP
Step NAT
LP
Two-Stage NAT
LP
a
Low Fire setting range for VR8305Q 1/2 in. by 1/2 in. and 1/2 in. x 3/4 in. is 1.5 to 3.0 kPa.
Type of
Model Type Gas
Standard, NAT
Slow
LP
Step NAT
LP
Two-stage NAT
LP
a
Low Fire setting range for VR8305Q 1/2 in. by 1/2 in. and 1/2 in. x 3/4 in. is 0.37 to 0.75 kPa.
VR8105, VR8205, AND VR8305 DIRECT IGNITION COMBINATION GAS CONTROLS
to
to decrease
to
to
Table 8. Pressure Regulator Specification Pressures (in. wc).
Nominal Inlet
Pressure
Range
5.0 - 7.0
12.0 - 14.0
5.0 - 7.0
12.0 - 14.0
5.0 - 7.0
12.0 - 14.0
Table 9. Pressure Regulator Specification Pressures (kPa).
Factory-Set Nominal Outlet
Nominal Inlet
Pressure Range
1.2 - 1.7 —
2.9 - 3.9 —
1.2 - 1.7 0.2
2.9 - 3.9 0.5
1.2 - 1.7 —
2.9 - 3.9 —
10. Once high and low pressure have been checked
and adjusted, replace pressure regulator
adjustment cap. If the desired outlet pressure or
flow rate cannot be achieved by adjusting the gas
control, check the control inlet pressure using a
manometer at the inlet pressure tap of the control. If
the inlet pressure is in the nominal range (see
Tables 8 and 9), replace the gas control. Otherwise,
take the necessary steps to provide proper gas
pressure to the control.
Check Safety Lockout (Slow-Opening
Controls Only)
1. With the system power off and the thermostat set to
call for heat, manually shut off the gas supply.
2. Energize ignition control and start timing safety
lockout time. When spark ignition terminates, stop
timing.
NOTE: When using the VR8105H, VR8205H, and
VR8305H step-opening control, the specified
ignition control safety lockout time must exceed
8.5 seconds for the system to function properly.
3. After spark cutoff, manually reopen the gas control
knob. No gas should flow to the main burner.
4. Reset the system by adjusting the thermostat below
room temperature, wait 30 seconds, and then move
the thermostat setting up to call for heat. Normal
ignition should occur.
Factory-Set Nominal Outlet
Pressure
Step Full Rate
— 3.5
— 10.0
0.9 3.5
2.2 10.0
— 1.7 Low
3.5 High
— 4.9 Low
10.0 High
Pressure
Step Full Rate
0.9
2.5
0.9
2.5
0.48 Low
0.90 High
1.2 Low
2.5 High
9
Setting Range
Step Full Rate
— 3.0 - 5.0
— 8.0 - 12.0
None 0.7 - 1.7
None 1.4 - 5.5
—
0.9 - 3.0 Low
3.0 - 5.0 High
— 2.5 - 7.0 Low
8.0 - 11.0 High
Setting Range
Step Full Rate
— 0.7 - 1.2
— 2.0 - 3.0
None 0.17 - 0.48
None 1.4 - 1.37
—
0.22 - 0.75 Low
0.75 - 1.2 High
— 0.6 - 1.8 Low
2.0 - 2.5 High
a
a
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