Carrier 48TJ016-028 - Manual (Page 29)

Table 13 — CO
2
Sensor Standard Settings
SETTING EQUIPMENT OUTPUT
VENTILATION
RATE
(cfm/Person)
ANALOG
OUTPUT
CO 2
CONTROL RANGE
(ppm)
OPTIONAL
RELAY SETPOINT
(ppm)
RELAY
HYSTERESIS
(ppm)
1
Interface with Standard
Building Control System
Proportional Any
0-1 ov
4-20 mA
0-2000 1000 50
2 Proportional Any
2-1 OV
7-20 mA
0-2000 1000 50
3 Exponential Any
0-1 OV
4-20 mA
0-2000 1100 50
4
Economizer
Proportional 15
0-1 OV
4-20 mA
0-1100 1100 50
5 Proportional 20
0-1 OV
4-20 mA
0- 900 900 50
6 Exponential 15
0-1 OV
4-20 mA
0-1100 1100 50
7 Exponential 20
0-1 OV
4-20 mA
0- 900 900 50
8 Health & Safety Proportional —
0-1 OV
4-20 mA
0-9999 5000 500
9
Parking/Air Intakes/
Loading Docks
Proportional —
0-1 OV
4-20 mA
0-2000 700 50
LEGEND
ppm — Parts Per Million
Dehumidification of Fresh Air with DCV Control — Infor­
mation from ASHRAE indicates that the largest humidity load
on any zone is the fresh air introduced. For some applications,
a field-installed energy recovery unit can be added to reduce
the moisture content of tire fresh air being brought into the
building when tire enthalpy is high. In most cases, the normal
heating and cooling processes are more than adequate to re­
move the humidity loads for most commercial applications.
If normal rooftop heating and cooling operation is not ade­
quate for the outdoor humidity level, an enei'gy I'ecoveiy unit
and/or a dehumidification option should be considei'ed.
Step 14 — Install Humidistat for Optional
MoistureMi$er’^'^ Package
— MoistuieMi$er dehu­
midification package operation can be controlled by field in­
stallation of a CaiTiei'-approved humidistat. To install the humi­
distat perform the following procedure:
1. Locate humidistat on a solid interior wall in the condi­
tioned space. Location should be a well ventilated area
to sense average humidity.
2. Route thermostat cable or equivalent single leads of col­
ored wir'e from Humidistat terminals through conduit in
unit to the low voltage connection on the 2-pole terminal
strip (TB3) as shown in Fig. 4.3 and Fig. 44. See Fig. 45
for operational diagram.
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