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Table 2 — 35L,N Unit Weights
BASE
PNEUMATIC
UNIT
SIZE
UNIT
CONTROLS
(lb)
4, 5, 6
29
7, 8
33
9, 10
41
35L
12
51
14
67
16
75
22
129
6
31
8
42
10
61
35N
12
80
14
98
16
111
LEGEND
DDC — Direct Digital Controls
NOTE: Data is based on the following conditions:
1. Unit casing is 22 gage.
1
2. Unit insulation is
/
-in. thick, 1.5-lb Tuf-Skin
2
fiberglass.
3. Units rated with standard linear flow sensor.
Warranty
All Carrier-furnished items carry the standard Carrier warranty.
CONTROL ARRANGEMENTS
The 35L,N dual duct units are offered with a wide variety of
factory-mounted controls that regulate the volume of air de-
livery from the unit and respond to cooling and heating load
requirements of the conditioned space. Stand-alone controls
will fulfill the thermal requirements of a given control space.
These devices are available in both pneumatic and electronic
arrangements. Carrier PIC (Product Integrated Controls) is a
communicating control that is integrated with the building
system. The PIC controls are compatible with the CCN sys-
tem. A number of DDC (Direct Digital Controls) control
packages by others are available for consignment mounting,
as indicated.
Control offerings are:
35(L,N)A: Analog Electronic
35(L,N)C: CCN Direct Digital Electronic
35(L,N)P: Pneumatic
35(L,N)N: None or DDC by others
Each control approach offers a variety of operating functions;
a control package number identifies combinations of control
functions. The following listings contain the basic function
arrangements for each control offering. Because of the vari-
ety of functions available, circuit diagrams, operating se-
quences, and function descriptions are contained in separate
Application Data publications. Refer to the specific control
publication for details.
CCN Control Arrangement
The CCN control packages must be used in combination with a
thermostat. Thermostats are not included in the CCN package.
4160: Constant volume dual duct
4170: 35N only, variable volume dual duct, constant mini-
mum cooling (requires cold deck inlet and total flow probe)
4175: 35N only, variable volume dual duct, cooling close-off
during heating (requires hot deck inlet and total flow probe)
4180: 35N only, constant ventilation dual duct, Cooling only
(requires cold deck inlet and total flow probe)
1. Tuf-Skin is a trademark of Johns Manville.
WITH
WITH DDC OR
ANALOG CONTROLS
(lb)
(lb)
37
47
41
51
49
59
59
69
75
85
83
93
137
147
39
49
50
60
69
79
88
98
106
116
119
129
1
Rx dual density
4190: Variable air volume (VAV) with Demand Controlled
Ventilation (DCV) requires separate CO
Analog Electronic Control Arrangement
Control package is pressure independent and includes a stan-
dard linear airflow sensor in both the hot and cold inlets for
variable air volume control, 24-volt transformer, control en-
closures, and a wall thermostat to match the control type.
Variable volume control:
2400 — Heating and cooling control, hot and cold inlet sen-
sor location (35L,N)
2440 — Heating and cooling control, hot inlet and discharge
airflow sensing (35N only)
2470 — Heating and cooling control, cold inlet and discharge
airflow sensing (35N only)
Direct Digital Electronic Control Arrangement
(Field-Supplied)
Control packages are field-supplied for factory mounting, un-
less otherwise noted. All DDC control arrangements include
a standard linear inlet flow sensor, 24-volt transformer and
control enclosure.
Contact Carrier for details about mounting field-supplied
controls.
Pneumatic Control Arrangement
All control packages are pressure independent and include
standard linear airflow sensors in both the hot and cold inlets
for variable air volume control or an airflow sensor in one inlet
and the unit discharge for constant volume control arrange-
ments. Thermostats will either be direct acting (DA) or reverse
acting (RA), and damper position will be identified as normally
open (NO) or normally closed (NC).
Variable air volume control with inlet air sensing (all units):
•
1500 — Multi-function controller, DA-NC cold inlet, NC
hot inlet
•
1501 — Multi-function controller, DA-NC cold inlet,
NO hot inlet
•
1502 — Multi-function controller, DA-NO cold inlet,
NO hot inlet
•
1503 — Multi-function controller, DA-NO cold inlet,
NC hot inlet
•
1504 — Multi-function controller, RA-NC cold inlet, NC
hot inlet
•
1505 — Multi-function controller, RA-NC cold inlet, NO
hot inlet
•
1506 — Multi-function controller, RA-NO cold inlet,
NO hot inlet
•
1507 — Multi-function controller, RA-NO cold inlet, NC
hot inlet
Constant volume control with hot inlet and discharge air
sensing (35N Units):
•
1508 — Multi-function controller, DA-NC cold inlet, NC
hot inlet
•
1509 — Multi-function controller, DA-NC cold inlet,
NO hot inlet
•
1510 — Multi-function controller, DA-NO cold inlet,
NO hot inlet
•
1511 — Multi-function controller, DA-NO cold inlet, NC
hot inlet
•
1512 — Multi-function controller, RA-NC cold inlet, NC
hot inlet
•
1513 — Multi-function controller, RA-NC cold inlet, NO
hot inlet
3
sensor
2
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