31
Table 10 – 574D-- --A Wet Coil Pressure Drop (IN. W.C.)
UNIT
SIZE
STANDARD CFM (S.C.F.M)
600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
24 0.030 0.037 0.044 0.053 0.063 --- --- --- --- --- --- --- --- --- ---
30 --- 0.037 0.044 0.053 0.063 0.072 0.081 0.105 --- --- --- --- --- --- ---
36 --- --- --- 0.055 0.060 0.090 0.100 0.110 0.140 --- --- --- --- --- ---
42 --- --- --- --- 0.045 0.050 0.060 0.065 0.075 0.080 0.090 0.094 0.110 --- ---
48 --- --- --- --- --- --- 0.041 0.063 0.085 0.100 0.104 0.110 0.120 0.130 ---
60 --- --- --- --- --- --- --- --- --- 0.060 0.065 0.072 0.077 0.085 0.100
Table 11 – Wet Coil Air Delivery (CFM) -- Downflow -- High Speed with 1--in. (25 mm) Filter and Economizer
UNIT SIZE
EXTERNAL STATIC PRESSURE (IN. W.C.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
36 1333 1289 1256 1214 1152 1118 1076 1035 997 950
42 1612 1569 1527 1481 1451 1393 1351 1317 1278 1242
48 2166 2085 2002 1919 1798 1709 1582 1467 1270 988
60 2298 2239 2180 2110 2044 1951 1862 1777 1697 1591
MAINTENANCE
To ensure continuing high performance and to minimize the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This unit should be
inspected at least once each year by a qualified service person. To
troubleshoot unit, refer to Table 12--14, Troubleshooting Chart.
NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
PERSONAL INJURY AND UNIT DAMAGE
HAZARD
Failure to follow this warning could result in personal
injury or death and unit component damage.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills,
tools and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment,
other than those procedures recommended in the Owner’s
Manual.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow these warnings could result in personal
injury or death:
1. Turn off electrical power to the unit and install lock out
tag before performing any maintenance or service on this
unit.
2. Use extreme caution when removing panels and parts.
3. Never place anything combustible either on or in contact
with the unit.
!
WARNING
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper
operation.
Errors made when reconnecting wires may cause improper
and dangerous operation. Label all wires prior to
disconnecting when servicing.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental
pollution.
Remove and re--cycle all components or materials (i.e. oil,
refrigerant, etc) before unit final disposal.
!
CAUTION
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
2. Inspect indoor coil, drain pan, and condensate drain each
cooling season for cleanliness. Clean when necessary .
3. Inspect blower motor and wheel for cleanliness at the
beginning of each heating and cooling season. Clean when
necessary. For first heating and cooling season, inspect
blower wheel bi --monthly to determine proper cleaning
frequency.
4. Check electrical connections for tightness and controls for
proper operation each heating and cooling season. Service
when necessary.
5. Ensure electric wires are not in contact with refrigerant
tubing or sharp metal edges.
6. Check and inspect heating section before each heating
season. Clean and adjust when necessary.
7. Check flue hood and remove any obstructions, if necessary.
Air Filter
IMPORTANT: Never operate the unit without a suitable air filter
in the return--air duct system. Always replace the filter with the
same dimensional size and type as originally installed. See Table 1
for recommended filter sizes.
Inspect air filter(s) at least once each month and replace
(throwaway--type) or clean (cleanable--type) at least twice during
each cooling season and twice during the heating season, or
whenever the filter becomes clogged with dust and lint.
Indoor Blower and Motor
NOTE: All motors are pre--lubricated. Do not attempt to lubricate
these motors.
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
574D-- -- A
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