Ademco RT8220A 2 Users Manual

Honeywell

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User’s Manual

RT8220A-2 is a transmitter to be used with the RV8310D receiver/valve.

RF MILLIVOLT SYSTEM

The RF millivolt system consists of a RV8310D receiver/valve, RT8220A or RT8220A-2
transmitter, and a pilot burner with two Q313 thermopiles.

The RV8310D is flame powered with two thermopiles, and has flame powered
modulation, line powered fan modulation, and a quick dropout function of 30 seconds or
less with loss of pilot flame.

The receiver has a manual switch. If the switch is in the REMOTE mode and the pilot is
lit, the transmitter can control the main valve, flame modulation, fan control, and set
temperature. If the switch is in the LOCAL mode and the pilot is lit, the valve will be at
the highest fixed pressure setting and the transmitter cannot turn off the main burner. The
transmitter will control the fan but not the flame modulation.

The pilotstat knob in the valve portion of the control provides for the OFF mode for the
RV8310D. When the pilotstat knob is rotated to the OFF position, the pilot and main
valve are turned off and the transmitter provides no control.

The valve portion of the control has a pilotstat, pilot adjustment, European style inlet and
outlet pressure taps, 7/16-24 UNS pilot connection, and 3/8” NPT inlet and outlet
connections. The capacity is 60,000 BTUH at 1” p.d..

The regulator is dedicated natural gas or LP. The receiver/valve is rated at 175 F. If the
ambient temperature rises above 185 F, the output pressure is reduced until the ambient
temperature drops below 175F.

INSTALLATION OF RV8310D

1. Use only on a vented appliance.

2. Turn off the gas supply at the appliance service valve before starting the installation,

and perform a Gas Leak Test after the installation is complete.

3. Mount valve 0 to 90 degrees, in any direction – including vertically – from the upright

position of the gas control knob

4. Attach four thermopile leads. Two leads are white wires with a terminal. They are

attached to the terminals with a white dot on the cover next to them. The two leads
with the red wires attach to the remaining terminals.

OPERATION

1. Turn the pilotstat knob counterclockwise from OFF to the PILOT position, push the

knob down, and hold in position. The pilot valve opens and allows gas to flow to the
pilot burner.

2. Push the plunger on the piezo until the pilot burner is lit. When the pilot burner is lit,

the LED on the control will come on after approximately 40 seconds and will be
continuously red. When the light turns off which will be approximately 10 seconds
after it has been continuously red, the receiver/valve is fully powered.

3. Release the knob. The shaft will move upward. The pilot burner should now stay

burning. If the pilot burner goes out, repeat step 2.

4. Turn the knob counterclockwise to the ON position. If the manual switch is in the

LOCAL position, the main burner will turn on immediately.

5. On the initial use of a transmitter, a recognition operation is required between the

receiver/valve and transmitter. Change the switch from LOCAL to REMOTE. Press
the fan or flame button on the transmitter within 30 seconds. The LED will blink
indicating that the transmitter will now work with the receiver/valve. If the switch
continues in the REMOTE position, the transmitter will now control the main valve,
flame modulation level, and fan control.

6. If the manual switch is in the LOCAL position, the valve will be at the highest fixed

pressure setting. The transmitter will control the fan only.

SHUT OFF PROCEDURE

1. If the manual switch is in the REMOTE position, the RT8220A transmitter can shut

off the main burner and fan. However, the control is still on and a command from the
transmitter can turn on the main burner or fan.

2. To shut off the system, turn the pilotstat knob clockwise to the OFF position. This

action closes the main gas and safety valves. The transmitter cannot turn on the main
burner or fan.

TRANSMITTER – RT8220A/RT8220A-2

The transmitter controls the flame level, fan speed, and room temperature. The three
basic operating modes are the OFF mode, ON (manual) mode, and AUTO mode.