Carrier 40QA Installation, Start-Up And Service Instructions Manual page 9

NOTE: Arrow on AccuRater® body points in free flow direction away
from the indoor coil.
Fig. 13 — AccuRater Metering Device in Liquid
Line (Bypass Type Components), 38HDC and QRC
Systems Only
f. Refer to 38HDC, 38HDS, and 38QRC Installation,
Start-Up and Service Instructions for additional out-
door unit installation information.
g. Install a liquid line filter drier near the 38HDC or QRC
outdoor unit. On heat pump systems, a bi-flow filter
drier must be used.
3. Insulate and caulk wall openings to reduce air infiltration
and refrigerant pipe vibrations on structure.
4. Evacuate piping, if necessary. If either refrigerant piping
or the indoor coil is exposed to atmospheric conditions,
it must be evacuated to 1000 microns to eliminate con-
tamination and moisture in the system. Refer to Carrier's
Standard Service Techniques Manual, Chapter 1, Sec-
tions 1-7.
Table 4 — Required Piston Size for AccuRater Metering Device, Cooling-Only Systems
INDOOR
UNIT 40QAB
024†
024
036
048
060
*Charge is based on 25 ft of interconnecting tubing. Charge may need to be added for longer tubing runs or when used with certain fan coil units.
†Unit is field reconfigured for 18,000 Btuh operation. See Before Installation section on page 3 for reconfiguration details. Check outdoor unit name-
plate for required charge.
NOTES:
1. All pistons are Chattleff B type.
2. All cooling units have a full factory charge for the smallest possible system combination.
3. Service valves are front-seating type.
Table 5 — Required Piston Size for AccuRater Metering Device, Heat Pump Systems
INDOOR
UNIT 40QAE
024†
024
036
048
060
*Charge is based on 25 ft of interconnecting tubing. Charge may need to be added for longer tubing runs or when used with certain fan coil units.
Check outdoor unit nameplate for required charge.
†Unit is field reconfigured for 18,000 Btuh operation. See Before Installation section on page 3 for reconfiguration details. Check outdoor unit
nameplate for required charge.
**Single phase/3 phase.
NOTES:
1. All pistons are Chatleff B type.
2. All heat pumps have a holding charge only as shipped from the factory.
OUTDOOR
UNIT 38HDC
018
024
030
036
048
060
OUTDOOR INDOOR PISTON
UNIT 38QRC SIZE (COOLING)
018
024
030
036
048
060
NOTE: Teflon Seal must face toward the outdoor heat pump unit.
Fig. 14 — AccuRater Metering Device at Service Valve
(Bypass Type Components),
PISTON SIZE
REQUIRED
53
57
65
70
84
93
OUTDOOR PISTON
SIZE (HEATING)
55
55
63
63
84
96
9
38QRC Systems Only)
REQUIRED SYSTEM
CHARGE (lb)*
3.7
5.5
5.6
5.4
7.4
13.6
REQUIRED SYSTEM
CHARGE (lb)*
49
49
55
61 7.5/8.7**
78
82
4.3
6.3
6.4
10.0
11.9