1341-ch
1 Printed in Canada
HMI
HOYME Manufacturing Inc.
1-800-661-7382
www.hoyme.com
Installation Instructions for
HMI
HOYME
Adaptor 0244-05A
Control Centre for One Furnace with Two Thermostats heating/cooling Two Separate Zones
INSTALLATION OF THIS ADAPTOR SHALL BE
IN ACCORDANCE WITH THE REQUIREMENTS
OF THE AUTHORITIES HAVING JURISDICTION
Refer also to HOYME Installation Instructions
for Replacement/Ventilation Air Control
Damper, Series HAC.
ADP-0244-05A
4” x 5” x 2 1/2”
101 x 127 x 64 mm
This Relay Adaptor (x2) is to be used in
tandem
as a control centre to operate
one furnace
with
two separate thermostats
to heat and cool
two
separate zones
in a building.
Two
24Vac
P
ower
C
lose
dampers
are also required. (See wire
diagrams on page 2)
Two-damper zone control operation:
Two Air Control Dampers are required and are to
be in the normally open position so that air from
the furnace fan supplies air simultaneously to both
zones. At such time as heating/cooling is required
to a zone, the damper to the other zone closes
thus allowing air to continue flowing to the zone of
attention. If both zones ask for attention, both
dampers remain open. At no time are both
dampers closed while the furnace circulating fan
is running. The call for air conditioning overrides
the call for heat.
Fitness of this Adaptor/Damper combination,
to satisfy air supply requirements for fuel fired
appliances during operation of the
Inter-connected exhaust fan(s), shall be
investigated by the enforcing authorities.
If an intake air duct is required, 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-0244-05A.
(
Two required
)
Each Adaptor comes with four 24Vac relays:
2 – DPDT, Coil 24Vac. Pts 24Vac-5 Amps.
2 – SPDT, Coil 24Vac. Pts 24Vac-5 Amps
General Installation:
- Refer to local and applicable codes.
- If an auxiliary transformer is required, use an
approved 24Vac transformer of adequate
capacity.
- Supply for the transformer primary shall be
taken from the line voltage supply of the
appliance.
- Always conduct a thorough check-out after
installation is complete.
- Affix appropriate labels and follow
instructions and warnings on each label.
Adaptor Installation:
1. Turn off the power to the furnace.
2. Place adaptors side by side in the area of the
furnace and identify each adaptor with each zone.
3. Connect each zone thermostat to its own
adaptor as per wiring diagram.
4. Note: Connect each adaptor to each other with
terminal #1 to terminal #2 of the other.
5. Connect each adaptor to the furnace terminals
as per wiring diagram.
Two zone damper installation
: Before installing
dampers, test for operation to power close with
24Vac supply.
Note:
Zone dampers are to be sized so that the
air flow capacity of either damper does not
overload the air flow capacity of the furnace fan. If
necessary, use an atmospheric pressure damper
as a bypass.
