Intertek ACVC96 Service Instructions Manual page 37

INSTALLATION CONSIDERATIONS
Example: Cooling Capacity of 30,000 BTU/hr.
30,000/12,000 = 2.5 Tons
2. Determine the proper air flow for the cooling system.
Most cooling systems are designed to work with air flows
between 350 and 450 CFM per ton. Most manufactur-
ers recommend an air flow of about 400 CFM per ton.
Example: 2.5 tons X 400 CFM per ton = 1000 CFM
The cooling system manufacturer's instructions must be
checked for required air flow. Any electronic air cleaners or
other devices may require specific air flows, consult instal-
lation instructions of those devices for requirements.
3. Knowing the furnace model, locate the high stage cool-
ing air flow charts in the Specification Sheet applicable
to your model. Look up the cooling air flow determined
in step 2 and find the required cooling speed and adjust-
ment setting. -----------------------------------
4. Locate the blower speed selection DIP switches on the
integrated control module. Select the desired "cooling"
speed tap by positioning switches S3 1 and 2 appropri-
ately. ------------------------------------------
NOTE: Trim function must also be inabled on S5 #2 DIP
switch.
RAMPING PROFILE
5.The multi-speed circulator blower also offers several cus-
tom ON/OFF ramping profiles. These profiles may be
used to enhance cooling performance and increase com-
fort level. ------------------------------------
Refer to the bullet points below for a description of each
ramping profile. Verify CFM by noting the number dis-
played on the dual 7-segment LED display.
• Profile A provides only an OFF delay of one (1) minute
at 100% of the cooling demand airflow.
100% CFM
OFF
• Profile B ramps up to full cooling demand airflow by
first stepping up to 50% of the full demand for 30 sec-
onds. The motor then ramps to 100% of the required
airflow. A one (1) minute OFF delay at 100% of the
cooling airflow is provided.
100% CFM
50% CFM
OFF
1/2 min
• Profile C ramps up to 85% of the full cooling demand
airflow and operates there for approximately 7 1/2 min-
utes. The motor then steps up to the full demand air-
flow. Profile C also has a one (1) minute 100% OFF
delay.
HEATING SPEED
1.Select the heating speed for your model from the heating
speed chart in the Specification Sheet. The adjust setting
(already established by the cooling speed selection) deter-
mines which set of speeds are available.
The selected speed must provide a temperature rise within
the rise range listed with the particular model.
In general lower heating speeds will: reduce electrical con-
sumption, lower operating sound levels of the blower, and
increase the outlet air temperature delivered to the home.
The speeds available allow the blower performance to be
optimized for the particular homeowner's needs.
CIRCULATING AIR AND FILTERS
DUCTWORK - AIR FLOW
Duct systems and register sizes must be properly designed
for the C.F.M. and external static pressure rating of the fur-
100% CFM
nace. Ductwork should be designed in accordance with the
OFF
recommended methods of "Air Conditioning Contractors of
1 min
America" manual D.
A duct system should be installed in accordance with Stan-
dards of the National Board of Fire Underwriters for the In-
stallation of Air Conditioning, Warm Air Heating and Venti-
lating Systems, Pamphlets No. 90A and 90B.
A return air filter is not supplied with the furnace. The in-
staller must supply a means of filtering all of the return air.
Filter(s) shall comply with UL900 or CAN/ULC-S111 Stan-
dards. If the furnace is installed without filters, the warranty
100% CFM
will be voided.
OFF
1 min
The following two charts show the bottom and side return
filter sizes available for each size furnace. Larger sizes are
also acceptable.
OFF
• Profile D ramps up to 50% of the demand for 1/2 minute,
then ramps to 85% of the full cooling demand airflow
and operates there for approximately 7 1/2 minutes. The
motor then steps up to the full demand airflow. Profile D
has a 1/2 minute at 50% airflow OFF delay.
OFF
Select Heating Speed preferences on S4 #7 & #8 DIP
Switches. Verify CFM by noting the number displayed
on the dual 7-segment LED display.
100% CFM
OFF
OFF
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