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SETTING
EQUIPMENT
1
Interface w/Standard
2
Building Control System
3
4
5
Economizer
6
7
8
Health & Safety
Parking/Air Intakes/
9
Loading Docks
LEGEND
PPM — Parts Per Million
Install the Supply Air Temperature Sensor (SAT) — When
the unit is supplied with a factory-mounted PremierLink™
control and an EconoMi$er2, the supply-air temperature (SAT)
sensor (33ZCSENSAT) is factory-supplied and wired. The wir-
ing is routed from the PremierLink control over the control
box, through a grommet, into the fan section, down along the
back side of the fan, and along the fan deck over to the supply-
air opening.
The SAT probe is wire-tied to the supply-air opening (on the
horizontal opening end) in its shipping position. Remove the
sensor for installation. Re-position the sensor in the flange of
the supply-air opening or in the supply air duct (as required by
local codes). Drill or punch a
Use two field-supplied, self-drilling screws to secure the sensor
probe in a horizontal orientation.
NOTE: The sensor must be mounted in the discharge airsteam
downstream of the cooling coil and any heating devices. Be
sure the probe tip does not come in contact with any of the unit
or heat surfaces.
CO SENSOR MAX RANGE SETTING
2
6000
5000
4000
3000
2000
1000
0
2
3
4
DAMPER VOLTAGE FOR MAX VENTILATION RATE
Fig. 35 — CO
Maximum Range Setting
Table 4 — CO
2
OUTPUT
Proportional
Proportional
Exponential
Proportional
Proportional
Exponential
Exponential
Proportional
Proportional
1
/
-in. hole in the flange or duct.
2
800 ppm
900 ppm
1000 ppm
1100 ppm
5
6
7
8
Sensor
2
Sensor Standard Settings
VENTILATION
RATE
ANALOG
(cfm/
OUTPUT
Person)
0-10V
Any
4-20 mA
2-10V
Any
7-20 mA
0-10V
Any
4-20 mA
0-10V
15
4-20 mA
0-10V
20
4-20 mA
0-10V
15
4-20 mA
0-10V
20
4-20 mA
0-10V
—
4-20 mA
0-10V
—
4-20 mA
Step 9 — Adjust Evaporator-Fan Speed —
just evaporator-fan rpm to meet jobsite conditions. Table 5
shows fan rpm at motor pulley settings. Table 6 shows motor
performance. See Table 7 and Fig. 36 and 37 for Accessory/
FIOP Static Pressure. Refer to Tables 8-29 to determine fan
speed settings.
DIRECT-DRIVE MOTORS — The evaporator-fan motor
factory speed setting is shown on label diagram affixed to base
unit. If other than factory setting is desired, refer to label
diagram for motor reconnection. See Fig. 38 for direct-drive
motor location.
BELT-DRIVE MOTORS — Fan motor pulleys are factory
set for speed shown in Tables 1A and 1B. See Fig. 39 for belt
drive motor location.
NOTE: Before adjusting fan speed, make sure the new fan
speed will provide an air temperature rise range as shown in
Tables 1A and 1B.
To change fan speed:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting nuts. See
Fig. 39.
3. Loosen movable pulley flange setscrew (see Fig. 40).
4. Screw movable flange toward fixed flange to increase
speed and away from fixed flange to decrease speed. In-
creasing fan speed increases load on motor. Do not ex-
ceed maximum speed specified in Table 1.
5. Set movable flange at nearest keyway of pulley hub and
tighten setscrew. (See Table 1 for speed change for each
full turn of pulley flange.)
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
Make angular alignment by loosening motor from
mounting.
To adjust belt tension:
1. Loosen fan motor mounting nuts.
2. Slide motor mounting plate away from fan scroll for
proper belt tension (
3. Tighten motor mounting nuts.
4. Adjust bolt and tighten nut to secure motor in fixed
position.
25
CO
OPTIONAL
2
CONTROL
RELAY
RANGE
SETPOINT
(ppm)
(ppm)
0-2000
1000
0-2000
1000
0-2000
1100
0-1100
1100
0- 900
900
0-1100
1100
0- 900
900
0-9999
5000
0-2000
700
1
/
-in. deflection with one finger).
2
RELAY
HYSTERESIS
(ppm)
50
50
50
50
50
50
50
500
50
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