4
Table 3B — Physical Data, Under Ceiling Heat Pump Units
*Field reconfigured to 18,000 Btuh (1
1
/
2
tons). See Before Installa-
tion section on page 3 for details.
†The valve connection size is
7
/
8
inch. The recommended line size
is 1
1
/
8
inch.
3. Remove inlet grilles from indoor unit by sliding for-
ward. Reinstall prior to unit start-up.
Step 2 — Select Location —
Consult local building
codes and NEC for special installation requirements. See Fig. 3
and 4 for unit dimensions and required clearances.
There are several ways the unit may be installed to different
types of ceiling construction. These instructions do not cover
all installation methods. As a typical installation, these instruc-
tions focus primarily on mounting the unit to metal in new
construction. Plan the installation carefully before you begin.
Listed below are some guidelines that should be followed
when determining location for the unit.
1. Place unit adjacent to an outside wall if fresh air is
required, ensuring that location allows for complete air
distribution.
2. Locate the thermostat in an area that is not subjected to
drafts or direct sunlight through windows. Locate the
thermostat on an internal wall whenever possible.
3. Allow sufficient clearance for airflow, wiring, refriger-
ant piping, and servicing unit (Fig. 3 and 4).
4. Make sure the unit is easily accessible to electrical
power.
UNIT SIZE
018*
024
030
036
048
060
NOMINAL CAPACITY (tons)
1
1
/
2
2
3
3
4
5
NOMINAL SIZE (Btuh)
18,000
24,000
30,000
36,000
48,000
60,000
OPERATING WEIGHT (lb)
110
110
119
119
151
181
MOISTURE REMOVAL WEIGHT
(Pints/Hr)
4.0
7.3
6.0
9.0
13.0
14.5
FINISH
GM Motorhome White with Black Trim
REFRIGERANT
R-410A
Control (Cooling)
AccuRater Control
TXV
INDOOR FAN
Direct Drive Centrifugal
Rpm...Cfm High
900…480
1050…550
1275...840
1275...840
1435...1130
1275...1600
Rpm...Cfm Medium
862...400
900…480
972...740
972...740
1388... 975
972...1220
Rpm...Cfm Low
770...320
862...400
830...640
830...640
1315... 820
830...1040
High Speed Watts
92
92
282
282
425
564
Motor Quantity
1
1
1
1
2
2
Blowers — No. ...Size (in.)
2...6x8
2...6x8
2...6x8
2...6x8
3...6x8
4...6x8
INDOOR COIL
Copper Tube, Aluminum Fin
Face Area (sq ft)
2.2
2.2
2.6
2.6
3.0
4.0
No. of Rows
4
4
4
4
4
4
Fins/in.
14.9
14.9
14.9
14.9
14.9
14.9
Circuits
4
4
4
4
8
8
FILTERS
Cleanable
Quantity
4
4
5
5
6
8
HEATERS (kW)
2.0
2.0
3.0
3.0
4.0
5.0
AIRSWEEP
Horizontal
User select ON/OFF
Vertical
Manual
CONTROLS
Control Voltage
24 V
Defrost Method
Timed
Dehumidification
Yes
Auto Restart
Yes
Fan Speed
High/Medium/Low
Condensate Pump Safety
Yes (Accessory)
Filter Change Indication
250 Hours of Indoor Fan Operation
Freeze Protection
Indoor coil less than 28 F, resets at 50 F.
REFRIGERANT LINES
Connection Type
Flare
Liquid Line OD (in.)
3
/
8
Vapor Line OD (in.)
5
/
8
5
/
8
3
/
4
3
/
4
7
/
8
7
/
8
†
Max Line Length
For maximum line lengths see condensing unit instructions.
CONDENSATE DRAIN
CONNECTION
Pipe Thread (MPT)
CONDENSATE DRAIN SIZE (in.)
3
/
4
IMPORTANT: If necessary, reconfigure the 24,000 Btuh
fan coil unit to 18,000 Btuh. Unplug the fan motor at the
control box harness and plug into the 40QA018 marked
connector.
