The RED4 is a 4-zone panel that can control gas/
electric, hydronic, electric and both conventional
and dual fuel heat pumps with multi-stage heating
and cooling. Low cost heat/cool thermostats can
be used in all zones. Optionally, a heat pump
type thermostat can be used in Zone1.
Selecting Equipment Options
DIP switches 1, 2 and 3 select the type of HVAC system
that is being used. the panel is factory set for a Gas-Electric
system with Gas Fan operation.
Selecting a Gas-Electric or a Heat Pump System
the panel will operate with gas-electric, oil, hydronic and
electric HVAC systems when DIP switch #1 is in the OFF
position. the panel will operate with heat pump systems
when DIP switch #1 is in the On position.
Selecting Conventional or Dual Fuel Heat
Pump System
When DIP switch #1 is set to select heat pump operation,
DIP switch #2 selects a conventional heat pump or a dual
fuel heat pump. For conventional heat pumps the panel will
activate stage one and two compressors (Y1 and Y2). In
third stage heating the panel will activate both compressors
and the auxiliary heating (W2). For dual fuel heat pumps
only the auxiliary heating (W2) is activated during third
stage heating calls.
Selecting Gas or Electric Fan Operation
DIP switch #3 selects Gas or Electric Indoor Fan operation.
In Gas mode the fan is not turned on by the panel during
a heating call. A sensor or timer in the furnace will
automatically turn the fan on.
In Electric operation, the panel turns the fan on during
heating calls. Selecting a heat pump system will automatically
turn the fan on during heating calls. If a dual fuel heat pump
is used, DIP switch #3 selects whether the fan is operated
during calls using the auxiliary fuel system for heating.
In both Gas-Electric and Heat Pump Systems, the indoor fan
is activated during cooling calls.
Selecting the Type of Thermostat in Zone1
DIP switch #4 selects the type of thermostat being used in
Zone1. For heat pump systems, a heat pump thermostat may
be selected for Zone1 to provide emergency heat control on
the thermostat. When using a heat/cool thermostat for heat
pump systems the emergency heat can be controlled by the
Emergency Heat slide switch on the panel or an external
switch. Do not use the panel switch or the external switch
DuroZone
RED4 - InStALLAtIOn InStRUCtIOnS PAGE 3
INSTALLATION INSTRuCTIONS
if Dip switch #4 is set to HP.
Selecting Purge Control
DIP switch #5 selects whether the heated or cooled air
stored in the system at the end of a heating or cooling cycle
is purged by the panel. If purge is controlled by the panel,
the indoor fan will be operated for 90 seconds at the end of
the call to purge the system. During purge the dampers will
remain in the position just before purge and purged air goes
to the last zone calling.
Selecting Capacity Limit Control
DIP switch #6 selects whether multi stage heating or cooling
will be inhibited if only half or less of the zone(s) are calling
for heating or cooling.
Selecting Outdoor Temperature Limit Control
DIP switch #7 selects whether multi stage heating will be
inhibited if the outdoor temperature is above the temperature
set on the ODt Limit potentiometer. note: For dual fuel
heat pumps, switch #7 must be off (in the nO position)
if the heat pump automatically switches to the auxiliary
heating system when the outdoor temperature drops below
the temperature set on the ODt Limit potentiometer.
Selecting Opposite System Service
the panel will normally service heating or cooling based on
whether there are more heating or more cooling calls.
If Opposite System service is selected using DIP switch
#8 , the panel will switch to the opposite system after calling
continuously for 20 minutes even though there may be only
one zone calling for the opposite system.
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