ADP-0MV2-S5A – Installation Instructions – Welcome to Hoyme Manufacturing Inc.

ADP-0MV2-S5A Interlocks 24Vac Combustion Air Control Damper To 250mVdc/100 Vdc Safety Control Circuits

4” x 5” x 2 1/2” (101 x 127 x 64 mm)
This Adaptor comes with two relays and a printed circuit which senses a 250 mVdc/100 Vdc safety control circuit, opens a 24Vac damper and then signals back to the safety circuit for firing.
For line voltage AC safety control circuits, use Adaptor ADP-1102-S5A

Installation of this Adaptor shall be in accordance with the requirements of the authorities having jurisdiction

Refer to HMI HOYME Installation Instructions: ‘Combustion Air Control Damper, Series HOM’

Test/Run Switch
Printed Circuit Board with Relays
Main Coil 24Vac. Points 24Vac/5Amps
For one appliance, use one Adaptor and one Damper, Series HOM, Type – SF1
For two appliances, use two Adaptors and one Damper, Series HOM, Type – SF1
Adaptor is to be mounted as close as possible to 250 mVdc/100Vdc gas valve
Additional wire shall not be spliced to the RED, BLACK or WHITE leads
Use an approved 24Vac transformer of adequate capacity (10 VA min.)
Supply for the primary of the transformer shall be taken from the line voltage supply for the appliance. Refer to applicable codes
Affix attached wiring diagram label adjacent to appliance wiring diagram label

Turn temperature control to lowest setting
Turn off electric power. Add a 24Vac transformer to power the Damper Closed
Follow applicable Codes
Connect damper wires BLACK (1), RED (2), BROWN (3) to Adaptor terminals 1, 2 and 3 respectively
Connect damper wire BLUE (5) to Adaptor terminals
Connect 24Vac transformer wires to Adaptor terminals 3 and 5
Turn on electric power to transformer. Damper will close
Test for common ground by touching WHITE Adaptor lead to base of gas valve. If sparking occurs, interchange transformer wires on Adaptor terminals 3 and 5

Pilot light to remain burning
Adaptor leads BLACK and WHITE must be properly matched to the dc polarity of the power pile with the Pilot light burning
Test by touching Adaptor WHITE lead to Thermopile Wire on terminal (PP) on Coil side of the gas valve while touching Adaptor BLACK lead to remaining thermopile wire. Damper should now open. If no response, exchange Adaptor leads and retest
Take Note of this WHITE ‘Lead/Thermopile’ wire combination
Connect this WHITE ‘Lead/Thermopile’ wire combination to (PP) terminal on Coil side of the gas valve. (This might require inter-changing thermopile wires and relight pilot if necessary.)
Disconnect temperature control wire leading to the TH terminal on Gas Valve Coil and replace with the Adaptor RED wire
Rejoin the temperature control wire to the Adaptor BLACK lead with a screw-on wire connector
Turn temperature control to call for heat – Damper will open and heating appliance will operate normally
Always conduct a thorough check-out after installation is complete

Adaptor leads BLACK and WHITE must be properly matched to the dc polarity of the safety circuit
Test by touching Adaptor WHITE and BLACK wires to the dc source leading to the gas valve. If damper does not open, reverse the Black and WHITE leads and the damper will open. Note this polarity combination
With voltages other than mVdc, turn the supply power off
Connect the WHITE lead wire to the gas valve as per polarity combination found above under Inter-Connecting the Adaptor to the Power Pile of a mVdc Circuit
On the other side of the gas valve disconnect the dc wire and replace it with the Adaptor RED wire
To the wire removed above located under: (Inter-Connecting the Adaptor to the Power Pile of a mVdc Circuit – Disconnect temperature control wire leading to the TH terminal on gas valve coil and replace with the Adaptor RED wire), connect the Adaptor BLACK wire with the wire nut supplied
Turn on the power, turn temperature control to call for heat, damper will open and heating appliance will operate normally
On DC CIRCUITS other than mVdc circuits, the BLACK and WHITE leads of shall also be matched to the dc polarity of the safety circuit.
Adaptor leads BLACK, RED and WHITE are to be connected to the 250mVdc/100Vdc safety circuit only.

Note: This marking is also on label to be affixed adjacent to appliance wiring diagram.

Additional wire shall be of the same size and type as originally used when completing the above circuit.

For more information, please contact HMI HOYME Manufacturing Inc. @ 1-800-661-7382