
Installation Instructions for HMI HOYME Adaptor 1103-TWP
24Vac/120Vac Controlled Voltage to Switch 24Vac
1218-ch -1 - Printed in Canada
Installation f This Adaptor Shall Be In
Accordance With The Requirements f the
Authorities Having Jurisdiction.
Refer also to H YME Installation Instructions:
Replacement/Ventilation Air Control Damper –
HAC-0x10- PC/P ; ADP-1101-05A; ADP-1102-
TWP.
ADP-1103-TWP
4” x 5” x 2 1/2”
101 x 12 x 64 mm
This Adaptor ADP-1103-TWP is an automatic
switch to actuate a 24Vac Replacement
Ventilation air damper to open while running a
designated exhaust fan or during the firing cycle
of one or the other of two furnaces sharing a
common fresh air duct. Running the exhaust
fan will simultaneously cause the replacement
air damper to open and the main furnace fan
only to run. The firing of either furnace will also
cause the replacement air damper to open.
Fitness of this Adaptor/Damper combination,
to satisfy air supply requirements for fuel fired
appliances during operation of the in-
terconnected exhaust fan(s), shall be
investigated by the enforcing authorities.
Air intake duct installation shall be in accordance
with: In Canada - CAN/CSA B149 & B139; In the
USA – ANSI/NFPA 54, 2006, ANSI Z223.1 and/or
local codes including local codes relating to
ventilation air duct installation.
I.D.: ADP-1103-TWP
Two Relays SPDT: Relay Coil 24Vac.
One Relay DPDT: Relay Coil -120Vac.
All Contact Points – 24Vac – 5 Amps.
-Adaptor line voltage leads, connected to the
exhaust fan controlled line, shall be suitably
cabled, fastened and enclosed in suitable
raceways.
-Refer to local and applicable codes.
-Always conduct a thorough check-out after
installation is complete.
-Affix appropriate labels and follow instructions
and warnings on each label.
Connecting the Adaptor ADP-1103-TWP to a
controlled 120Vac Designated Ventilation
Exhaust Fan circuit and to the Replacement
Ventilation HAC Damper.
1. Turn off electrical power supply to
appropriate appliance(s).
2. Choose one of the furnaces as the main
appliance and install the ‘HAC’ motorized air
control damper in the duct as per instructions
supplied with it. Satisfactory operation of the inlet
damper is recommended before interconnecting
to the Adaptor.
3. Connect Adaptor line voltage leads (120Vac) to
the controlled exhaust fan circuit as per wiring
diagram. Follow applicable codes.
4. Connect Adaptor terminal #5 to the ‘R’
terminal (24 Vac) of the main furnace.
5. Connect Adaptor terminal #2 to one of the two
wires of the Power Close type HAC’ damper or
Adaptor terminal #1 to the Power pen type.