GENERAL
Page 11
HARMONY IIIT ZONE CONTROL SYSTEM
Zone Control Panel Jumpers (SYSTEM Configuration/E−Heat Stages)
SYSTEM Configuration/E−HEAT Stages
Jumpers
The SYSTEM configuration jumpers must be inserted to
select the type of cooling and heating system that has
been installed and the E−HEAT Stages jumper defines if
the system is dual fuel or defines the number of electric
heating stages used.
Gas Furnace and Air Conditioning
For a gas furnace and air
conditioning combinations,
put the jumper on GAS (as
shown) and select the
number of equipment cool-
ing stages by placing the
cooling jumper to the ap-
propriate site (place on
1COOL for 1stage cooling
or 2COOL for 2−stage cool-
ing).
SYSTEM
Configuration
HP
2COOL
2HP
GAS
1COOL
1HP
E−HEAT
Stages
DF
1
2
3
IN A/C AND GAS FURNACE
CONFIGURATION, HP"
AND E−HEAT" JUMPERS
ARE IGNORED
In this configuration, the maximum discharge temperature
(upper temperature limit) at which the furnace is allowed to
run is 160°F (except when 140FDAS jumper [as described
on Page 10] is in place). At the upper limit, the zone control
system removes any heat demand from the furnace for a
minimum of 5 minutes and until the temperature comes
back within normal operating temperatures.
While at or above the upper temperature limit, the control
unit signals for continuous blower operation to those zones
from which a thermostat heat demand is received. When
setting up the furnace control board options, be sure to set
the BLOWER-OFF DELAY to no greater than 210 SEC-
ONDS.
Heat Pump with Electric Backup Heat
For heat pump with electric
backup heat, select HP
position as shown in this
diagram.
SYSTEM
Configuration
HP
2COOL
2HP
GAS
1COOL
1HP
E−HEAT
Stages
DF
1
2
3
In this configuration, the maximum discharge temperature
the electric heat or heat pump is allowed to run is 135°F. At
that temperature, the zone control system removes de-
mand from the heating unit for a minimum of 5 minutes and
until the temperature returns to the normal operating tem-
perature range. While at or above 135°F, the control unit
signals for continuous blower operation to those zones
from which a thermostat heat demand is received.
Select the number of equipment cooling stages by placing
the COOL stages jumper to the appropriate side (1COOL
or 2COOL). Similarly, set the number of Heat Pump stages
(1HP or 2HP). Jumper settings on the above diagram illus-
trate the proper settings for a 2-stage heat pump and two-
stage air conditioning system.
When using a heat pump with electric backup heat, insert
an E−HEAT jumper to select the total number of available
electric heat stages. The diagram above shows a single
heat-strip configuration.
Heat Pump− Dual Fuel heating, 1−stage or 2 Stage
Heat Pump and Gas Furnace
This diagram shows a
dual−fuel configuration
(heat pump for heat and
cool with gas backup heat).
SYSTEM
Configuration
HP
2COOL
2HP
GAS
1COOL
1HP
E−HEAT
Stages
DF
1
2
3
HP position must be jumpered for Dual Fuel applica-
tions and the E−Heat Stages jumper must be set to
DF" for dual fuel operation.
Select the number of equipment cooling stages by placing
the COOL stages jumper to the appropriate side (1COOL
or 2COOL). Similarly, set the number of Heat Pump stages
(1HP or 2HP). Jumper settings on the above diagram illus-
trate the proper settings for a 1−stage heat pump and
1−Stage of Cooling.
NOTE − See figure 23 (Page 38), Variations on Common
Applications for other jumper configurations and electrical
wiring variations.
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