Installation, Operation and Maintenance Manual
C13-Series
11
Subject to change without notice.
10.20-IM (0818)
Always follow accepted industry practices for sizing lines
based on line length and elevation differences�
Max� total equivalent line length = 100 ft� (a)
Max� elevation difference between Evap� and Cond� = 40 ft�
(a) (b)
Tons
Suction Line
Liquid Line
2 Ton
3/4
1/2
3 Ton
7/8
1/2
4 Ton
1-1/8
1/2
5 Ton
1-1/8
5/8
6 Ton
(2) 7/8
(2) 1/2
8 Ton
(2) 1-1/8
(2) 1/2
a�
Contact the factory for installations with elevation
differences greater than 40 feet or total equivalent
line lengths greater than 100 feet� Alternate line
sizes and specific refrigerant components may be
required�
b�
If condensing section is 20 feet or more above the
evaporator include an oil separator for each circuit�
Systems not ordered from the factory to be installed as a
split system will contain Female Fittings on the evaporator
section� Interconnect kit(s) must be ordered indicating that a
Male / Female Kit is required�
United CoolAir Corporation’s C13-Series horizontal units are
provided with unique self-sealing fittings on the refrigerant
lines between sections. These fittings or couplings allow the
two-section unit to be separated and reconnected without
loosing refrigerant charge�
When installed as a split system, an interconnect kit is
required for each refrigerant circuit or hot gas bypass line�
If the unit is defined as a split system when ordered, the
fittings will be male fittings on both sections. The interconnect
kit will then consist of the matching female fittings. An
interconnect kit is required for the field to connect refrigerant
lines between both sections� Refrigerant piping between the
sections is field supplied.
The interconnect kit also contains four (4) Schrader fittings.
The installer can place at least one in each refrigerant line or
at the end of the refrigerant line� These enable the refrigerant
line to be evacuated and charged as needed based on size
and length�
In some situations, the desired refrigerant line size may
differ from the self-sealing fitting size provided. The line size
should be reduced or enlarged at the self-sealing fittings as
necessary
The drawing below illustrates a typical piping arrangement
A�
Male self-sealing fittings on unit sections
B�
Refrigerant piping between sections (field-supplied)
C�
Female self-sealing fittings in interconnect kit (4)
D�
Schrader fittings in interconnect kit (4)
FIGURE 6: Guidelines for Interconnecting Tubing Sizing
5�
Disconnect and discard the wires which run between
the two internal control boxes (Item
(9)
, Figure 5)�
Single circuit units will have two low voltage wires to
be disconnected, dual and triple units will have 3 low
voltage wires� See Wiring Diagram on the inside of the
evaporator control box access panels (Item
(7)
, Figure
3) for disconnecting power wiring�
6�
Remove the two side cross-member angles (Item
(1)
,
Figures 3 and 5; and Item
(2)
, Figure 4)�
7�
Carefully pull the evaporator section away from the
condensing section� Double check that the self-sealing
couplings are completely disengaged�
The sections may now be moved to their individual locations,
either floor-mounted or hung.
INFORMATION
NOTE: Installations may be made with
up to 100 feet equivalent line lengths by
installing the recommended tube sizes
(See Figure 6) and adding the necessary
additional refrigerant, R-410a for the
field installed line set. (See Step 7, page
10)� For equivalent line lengths greater
than 100 ft�, contact the factory for line
sizing and additional refrigerant circuit
accessories required�
Evaporator
Section
Condensing
Section
A
A
A
A
C
C
C
C
B
B
D
D
D
D
Summary of Contents for C13-Series
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