Residential Air Conditioners and Heat Pumps Using R-22 and Puron® Refrigerant: Application Guideline and Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Two Stage Non-Communicating
127A/CA17/BA17CH17/BH17/226A
These units are a low cost 2-stage option that is non-communicating
utilizing 2 stage scroll technology. These units require Performance
Boost furnace, variable speed furnace, or newer model variable speed
fan coil. Variable speed fan coils prior to the FV4C will NOT be rated
with the new two stage units as they are not capable of meeting the air
flow requirements necessary for rating. These are designed to operate
with basic 24 volt thermostat inputs.
Operating Ambient
The minimum outdoor operating ambient in cooling mode is 55_F /
12.78_C, and the maximum outdoor operating ambient in cooling mode
is 125_F / 51.67_C when operating voltage is 230v. For 208v
applications, the maximum outdoor ambient is 120_F/ 48.9_C.
NOTE: Units operating at high stage operation, 208v (or below) line
voltage and at an outdoor ambient of 120_F (or greater), may experience
compressor trip.
NOTE: This product is not approved for low ambient cooling at this
time, and no low ambient kit is available.
Airflow Selections (ECM Furnaces)
The ECM Furnaces provide blower operation to match the capacities of
the compressor during high and low stage cooling operation. Tap
selections on the furnace control board enable the installing technician to
select the proper airflows for each stage of cooling. Below is a brief
summary of the furnace airflow configurations
1. The Y2 call for high stage cooling energizes the “Cool” tap on the
control board. The grey wire from cool tap is connected to tap 5 on
the motor. Refer to the furnace Product Data to find the
corresponding airflow. If the airflow setting for high cooling needs
to be switched from tap 5 to a different tap, jumper a connection
from the cool tap to the desired tap so that the Y2 signal is
communicated via the cool tap to the desired speed tap.
2. The Y1 call for low stage cooling energizes the “Fan” tap on the
control board. The red wire from the fan tap is connected to tap 1 on
the motor. Refer to the furnace Product Data to find the
corresponding airflow. If the airflow setting for low cooling needs
to be switched from tap 1 to a different tap, jumper a connection
from the Fan tap to the desired tap so that the Y1 signal is
communicated via the Fan tap to the desired speed tap. The Y1
setting will also govern the continuous fan airflow for the furnace.
Refer to the literature for the furnace for further details.
Airflow Selection for
Variable Speed Furnaces (non-communicating)
The variable speed furnaces provide blower operation to match the
capacities of the compressor during high and low stage cooling
operation. The furnace control board allows the installing technician to
select the proper airflows for each stage of cooling. Below is a summary
of required adjustments. See furnace installation instructions for more
details:
1. Turn SW1-5 ON for 400 CFM/ton airflow or OFF for 350 CFM/ton
airflow. Factory default is OFF.
2. The A/C DIP switch setting determines airflow during high stage
cooling operation. Select the A/C DIP switch setting corresponding
to the available airflow shown in the furnace Installation
Instructions that most closely matches the required airflow shown
in the air conditioning Product Data for HIGH speed.
3. The CF DIP switch setting determines airflow during low stage
cooling operation. Select the CF DIP switch setting corresponding
to the available airflow shown in the furnace installation
instructions that most closely matches the required airflow shown
in the air conditioning Product Data for LOW speed. If a higher or
lower continuous fan speed is desired, the continuous fan speed can
be changed using the fan switch on the thermostat. Refer to the
furnace Installation Instructions for details of how to use this
feature.
Airflow Selection for FV4C Fan Coils
(non-communicating)
The FV4 provides high and low-stage blower operation to match the
capacities of the compressor at high and low-stage.
To select recommended airflow, refer to the FV4C Installation
Instructions. The FV4C utilizes an Easy Select control board that allows
the installing technician to select proper airflows. This fan coil has an
adjustable blower-off delay factory set at 90 sec. for high- and low-stage
blower operation.
Airflow Selection for FZ4A Fan Coils
(non-communicating)
The FZ4A provides a method of using a discrete tap ECM motor for high
and low-stage tap capabilities.
To select the recommended airflow, refer to the FZ4A Installation
Instructions or Product Data for airflow table.
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