Table of Contents
Advertisement
Table 4 — CHS183-243 Piping Recommendations (Two-Circuit Unit)
R-410A
Length Linear
Model Nominal
Capacity
Length Equiv
Liquid Line (in.)
Max Lift Cool
CHS183
Max Lift Heat
Vapor Line (in.)
Charge ea. (lb)
Liquid Line (in.)
Max Lift Cool
CHS243
Max Lift Heat
Vapor Line (in.)
Charge ea. (lb)
NOTE(S):
a
For applications with equivalent length greater than 188 ft (57 m) and/or linear length greater than 125 ft (38 m), contact your local representative.
b
AHRI ratings as listed as only valid with the piping diameters specified.
LEGEND
Length Equiv
—
Equivalent tubing length, including effects of refrigeration
specialties devices
Length Linear
—
Typical linear tubing length, Feet (50% added to linear to
define Equivalent Length for this table)
Liquid Line
—
Tubing size, inches OD
Max Lift
—
Maximum liquid lift (indoor unit ABOVE outdoor unit only),
at maximum permitted liquid line pressure drop:
Linear Length Less than 100 ft: Minimum 2.0°F subcooling
entering TXV
Linear Length Greater than 100 ft: Minimum 0.5°F subcool-
ing entering TXV
Vapor Line
—
Tube size, inches OD
Charge
—
Charge Quantity, lb. Calculated for both liquid line sizes
(where applicable), but only with large suction line size
(where applicable)
CHECK VERTICAL SEPARATION
If there is any vertical separation between the indoor and
outdoor units, check to ensure that the separation is within
allowable limits. Relocate equipment if necessary.
PROVIDE SAFETY RELIEF
If local codes dictate an additional safety relief device, pur-
chase locally and install locally. Installation will require the
recovery of the factory shipping charge before the factory
tubing can be cut and the supplemental relief device is
installed.
REFRIGERANT LINE SIZING
Consider the length of the piping required between the out-
door and indoor units. The maximum allowable line length is
100 ft (30.5 m). See Table 4. Refrigerant vapor piping
should be insulated.
INSTALL
FILTER
DRIERS
INDICATORS
Every unit MUST have bi-directional filter driers in the liquid
lines. Locate the filter driers at the indoor unit, close to the
evaporator coil's thermostatic expansion valve (TXV) inlets.
CHS units include two R-410A-duty filter driers, shipped in
cartons attached to the unit basepan. Remove the filter
10
EQUIVALENT LENGTH (ft)
0-24
25-49
0-37
38-74
1/2
1/2
25
50
25
50
1-3/8
b
1-3/8
b
28.5
30.6
1/2
1/2
5/8
25
37
50
25
50
1-3/8
b
1-3/8
b
27.1
29.2
31.1
AND
MOISTURE
Specifications subject to change without notice.
50-74
75-112
1/2
75
60
1-1/8
24.8
1/2
5/8
24
51
60
1-1/8
1-1/8
30.7
33.6
driers and prepare to install in the liquid lines at the evapora-
tor coil. Do not remove connection fitting plugs until ready to
connect and braze the filter driers into the liquid line posi-
tions See Table 5.
IMPORTANT: A refrigerant receiver is not provided with
the unit. Do not install a receiver.
Installation of liquid line moisture indicating sight glass in
each circuit is recommended. Locate the sight glass(es) be-
tween the outlet of the filter drier and the TXV inlet.
Refer to Table 6 for recommendations on refrigeration
specialties.
Select the filter drier for maximum unit capacity and mini-
mum pressure drop. Complete the refrigerant piping from
the indoor unit to the outdoor unit before opening the liquid
and suction lines at the outdoor unit.
Table 5 — R-410A-Duty Filter Drier(s)
MODEL
LIQUID LINE
QTY
SIZE
CHS183
2
1/2 in.
CHS243
2
1/2 in.
75-99
100-125
113-149
150-188
1/2
1/2
100
125
60
60
1-1/8
1-1/8
26.6
28.6
5/8
5/8
48
63
60
60
1-3/8
1-3/8
37.1
40.2
DESSICANT
PART NO.
OD
VOLUME
REF
16 cu. in.
1192276
16 cu. in.
1192276
CHS-180-240-01SI Rev. A
a
Advertisement
Table of Contents
