11
R
G
FE Fan Coil or
Variable Speed Furnace
A07115
Fig. 29 -- G Input Wiring for System Shutdown
with Infinity
t
Control (Contact type selectable;
Normally Closed (default) or Normally Open)
High Stage Timer
Minimum amount of time low stage must operate before high stage
is activated. Ten to 60 minutes. 10 = default
A demand of 5
_
or more will override the staging timer.
Furnace Airflow (Capacity) Limiting
The following settings allow the installer to restrict the furnace
within certain minimum and maximum airflows. These airflows
are converted to capacities.
The Min and Max limits are
determined by the equipment size. These settings are not the same
as the zoning airflow limits.
Min CFM (only appears with modulating furnaces)
Minimum CFM to run a modulating furnace. This will increase
the minimum operating capacity of the furnace. Default value is
the furnace air flow for the lowest heat capacity.
Maximum CFM (only appears with modulating furnaces)
Maximum CFM to run a modulating furnace. This will reduce the
operating capacity of the furnace. Default value is the furnace air
flow for the highest heat capacity.
Off Delay
S
90 seconds
S
120 seconds (default)
S
150 seconds
S
180 seconds
Amount of time the blower will continue to run after heating has
shut off.
Dehum Drain
Turns off the continuous fan at the end of cooling for five minutes,
in order to drain the indoor coil of water. The fan will only be
turned off if a dehumidify demand existed at the start of or during
the cooling cycle. Default is enabled.
Altitude
S
US 0 -- 2000 (default)
S
US 2001 -- 3000
S
CA 2001 -- 4500 (for Canada only)
S
US 3001 -- 4000
S
US 4001 -- 5000
S
US 5001 -- 6000
S
US 6001 -- 7000
S
US 7001 -- 8000
S
US 8001 -- 9000
S
US 9001 -- 10000
This setting will adjust the furnace’s airflow to compensate for
altitude. Altitude adjustment is not available with older furnaces.
Please see furnace instructions for further details.
Setup -- Fan Coil
Heat Pump Heating:
S
COMFORT (default) Heat Pump airflow is varied depending on
outdoor temperature to maximize comfort.
S
EFF 325 -- fixed airflow used to achieve specified ratings -- no
dehumidification airflow reduction. This is nominally 325
CFM/ton, but will vary if a 2--stage outdoor unit is used.
S
EFF 350 -- fixed airflow used to achieve specified ratings -- no
dehumidification airflow reduction. This is nominally 350
CFM/ton, but will vary if a 2--stage outdoor unit is used.
S
MAXIMUM -- 400 CFM/ton.
Heat Pump Cooling Airflow:
S
COMFORT (default) Cooling airflow is varied depending on
humidity and temperature demand settings. This selection
enables the full dehumidify and comfort capabilities of the
system. When
COMFORT
is not selected, the unit will not run
reduced airflows for dehumidification. Heat Pump airflow is
varied depending on outdoor temperature to maximize comfort.
S
EFF 325 -- fixed airflow used to achieve specified ratings -- no
dehumidification airflow reduction. This is nominally 325
CFM/ton, but will vary if a 2--stage outdoor unit is used.
S
EFF 350 -- fixed airflow used to achieve specified ratings -- no
dehumidification airflow reduction. This is nominally 350
CFM/ton, but will vary if a 2--stage outdoor unit is used.
S
MAXIMUM -- 400 CFM/ton. Dehumidify features are not active
when set to maximum.
S
QUIET-- minimum cooling airflow that the system can safely
run (typically 300 CFM/ton). Use this setting if duct noise is a
severe problem. Note that duct sweating in high humidity
environments could be an issue.
Dehum Airflow:
S
NORMAL (factory default) -- When equipment is running to
dehumidify, the airflow is allowed to adjust to a minimum to
satisfy the dehumidification call.
S
HIGH -- Minimum airflow during the dehumidify mode is
increased to reduce duct and register sweating. Also increases
minimum airflow during normal cooling operation to reduce
duct sweating.
Heater Size:
S
(choices dependent upon fan coil model)
This will show the heater size entered during the start--up process.
This value can be changed to another value (limited by the model
number of the fan coil). If the electric heater is self--identifying, this
value is not shown.
Elect Heat Lockout
S
NONE (default)
S
+5 to 55
_
F (--15 to 18
_
C)
Outside temperature above which the electric heat will not operate
except for defrost.
G Terminal
This setup option selects desired operation when the R--G circuit is
made on the fan coil control board.
S
DISABLED (Default)
S
FAN -- turns on fan to selected fan speed when G terminal is
energized. See Fig. 28.
This setting is used in conjunction with fresh air supply products
(e.g. fresh air/make--up air dampers).
UIZ0
1
--
V
