Operating instructions

OPERATING BOILER
PROCEDURE 1—AUTOMATIC GAS VALVE
The automatic gas valve opens or closes according to heat requirements of thermostat and temperature limit control. It closes if pilot goes out. Each
individual control must be operating correctly before any gas can pass to burners. Any 1 control can hold gas supply from burner regardless of
demand of any other control.
PROCEDURE 2—SAFETY PILOT
The safety pilot prevents flow of gas to burner if pilot goes out or will not ignite.
PROCEDURE 3—GAS VALVE SAFETY SHUTDOWN TEST
A. Boilers Equipped with Continuous Pilot
With main burners firing, disconnect thermocouple from gas valve. Gas valve should immediately shut off main burners and pilot.
B. Boilers Equipped with Intermittent Ignition
With main burners firing, disconnect ignition cable from intermittent pilot control box. Gas valve should shut off main burners. TURN OFF
ELECTRIC POWER to boiler before reconnecting ignition cable to prevent electric shock.
PROCEDURE 4—RELIGHT
The electric and gas shall be off for 5 minutes before relighting.
PROCEDURE 5—THERMOSTAT
Keep thermostat set at desired room temperature. If windows are to be opened or heat is not needed, set thermostat to a lower setting.
NOTE: In the event of failure of any component, system will not operate or will go into safety lockout. The system is completely self-checking.
On every call for heat, each component must be functioning properly to permit operation. On safety lockout, system has to be reset by adjusting
thermostat to lowest setting for 1 minute, then back to normal setting.
Safe lighting and other performance criteria were met with gas manifold and control assembly provided on boiler when boiler underwent tests
specified in ANSI Z21.13-latest revision.
CHECKING AND ADJUSTING
PROCEDURE 1—PILOT BURNER ADJUSTMENT
Pilot flame should surround 3/8 to 1/2 in. of pilot sensor. (See Fig. 14.) If flame needs adjusting, proceed as follows:
1. Remove screw cover over pilot adjusting screw.
2. Insert small screwdriver and adjust flame as needed. Turn screw counterclockwise to increase flame and clockwise to decrease flame.
3. Replace screw cover over pilot adjusting screw.
PROCEDURE 2—MAIN BURNER AIR ADJUSTMENT
The main burners do not require primary air adjustment and are not equipped with primary air shutters. Main burner flames should form sharp
blue inner cones in a softer blue outer mantel, with no yellow. Puffs of air from blowing on flame or stamping on floor will cause flames to turn
orange momentarily. This is not unusual. Remain still when observing main burner flames. If flame appearance is not correct, check main burner
orifices and burner throat and flame ports for dust and lint obstruction. It may be necessary to remove rollout shield to observe main buner flames.
Replace rollout shield after observation. (See Fig. 15.)
Fig. 12—VR8200A/VR8300A Continuous Pilot Gas Valve
A95521
GAS CONTROL
KNOB SHOWN
IN "ON" POSITION
RED RESET
BUTTON
THERMOCOUPLE
CONNECTION
PILOT
ADJUSTMENT
(UNDER CAP
SCREW)
GAS
INLET
INLET
PRESSURE
TAP
WIRING
TERMINALS (2)
CONVENIENCE
TERMINALS (2)
(OPTIONAL)
OUTLET
PRESSURE
TAP
GAS
OUTLET
PILOT
OUTLET
PILOT
OFF
ON
PRESSURE REGULATOR
ADJUSTMENT
(UNDER CAP SCREW)
Fig. 13—Lighting Pilot
A99181
MATCH HOLDER
—18—