7
Table 1 – Physical Data -- Unit 574B
UNIT SIZE 574B
024040
024060
030040
030060
036060
036090
042060
042090
NOMINAL CAPACITY (ton)
2
2
2---1/2
2---1/2
3
3
3---1/2
3---1/2
OPERATING WEIGHT (lb.)
350
350
350
350
388
388
440
440
COMPRESSORS
Quantity
Scroll
1
REFRIGERANT (R---410A)
Quantity (lb.)
7.5
7.5
8.2
8.2
9.7
9.7
11.0
11.0
REFRIGERANT METERING
DEVICE
TXV
CONDENSER COIL Rows...Fins/in.
Face Area (sq ft)
2...21
11.95
2...21
11.95
2...21
11.95
2...21
11.95
2...21
13.7
2...21
13.7
2...21
15.4
2...21
15.4
CONDENSER FAN Nominal Cfm
Diameter (in.) Motor Hp (Rpm)
2350
22
1/8 (825)
2350
22
1/8 (825)
2350
22
1/8 (825)
2350
22
1/8 (825)
2800
22
1/8 (825)
2800
22
1/8 (825)
2800
22
1/8 (825)
2800
22
1/8 (825)
EVAPORATOR COIL Rows...Fins/
in. Face Area (sq ft)
3...15 3.7
3...15 3.7
3...15 3.7
3...15 3.7
4...15 3.7
4...15 3.7
3...15 3.7
3...15 3.7
EVAPORATOR BLOWER Nominal
Airflow (Cfm) Size (in.) Motor (hp)
770
10x10
1/2
770
10x10 1/2
960
10x10 1/2
960
10x10
1/2
1150
11x10
3/4
1150
11x10
3/4
1400
11x10
3/4
1400
11x10
3/4
FURNACE SECTION*
Burner Orifice No. (Qty...Drill Size)
Natural Gas Burner Orifice No.
(Qty...Drill Size)
Propane Gas
2...44
2...50
2...44
2...50
2...44
2...50
2...44
2...50
2...38
2...46
3...38
3...46
2...38
2...46
2...38
2...46
HIGH---PRESSURE SWITCH (psig)
Cut---out Reset (Auto)
610 +/---15
420 +/---25
LOSS---OF---CHARGE / LOW---
PRESSURE SWITCH (Liquid Line)
(psig) Cut---out Reset (auto)
20 +/---5
45 +/---10
RETURN---AIR FILTERS (in.)†
Throwaway
20x24x1
20x24x1
20x24x1
20x24x1
20x24x1
20x24x1
24x30x1
24x30x1
*Based on altitude of 0 to 2000 ft.
{
Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of
300 ft/minute for high---capacity type. Air filter pressure drop for non---standard filters must not exceed 0.08 in. wc.
Use spreader bars or crate top when rigging the unit. The units must
be rigged for lifting (See Fig. 6). Refer to Table 1 for operating
weight. Use extreme caution to prevent damage when moving the
unit. Unit must remain in an upright position during all rigging and
moving operations. The unit must be level for proper condensate
drainage; therefore, the ground--level pad or accessory roof curb
must be level before setting the unit in place. When a
field--fabricated support is used, be sure that the support is level and
properly supports the unit. Lifting point should be directly over the
center of gravity for the unit.
UNIT FALLING HAZARD
Failure to follow this warning could result in personal injury
or death.
Never stand beneath rigged units or lift over people.
!
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury
or death.
Never exceed 200 lbs. per bracket lifting force.
!
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal
injury/death.
Accessory lifting kit is only to be used with Small Packaged
units which have a composite unit base with molded rigging
holds.
!
WARNING
Step 6 — CONNECT CONDENSATE DRAIN
NOTE
: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Model 574B disposes of condensate water through a 3/4 in. NPT
fitting which exits through the compressor access panel (See Fig.
2 and 3 for location).
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in
groundlevel installations. Install a field--supplied condensate trap
at end of condensate connection to ensure proper drainage. Make
sure that the outlet of the trap is at least 1 in. lower than the
drain--pan condensate connection to prevent the pan from
overflowing (See Fig. 7). Prime the trap with water. When using a
gravel apron, make sure it slopes away from the unit. If the
installation requires draining the condensate water away from the
unit, install a 2--in. trap at the condensate connection to ensure
proper drainage (See Fig. 7). Make sure that the outlet of the trap
is at least 1 in. lower than the drain--pan condensate connection.
574B
