1
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal injury
or loss of life. Installation and service must be performed
by a qualified installer, service agency or the gas supplier
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental contact
with sharp edges.
INSTALLATION INSTRUCTIONS FOR ECONOMIZERS
USED WITH ZC,ZG,ZH 092-150 UNITS
Z1ECON16B-1 (11G98) ECONOMIZERS
HORIZONTAL ECONOMIZERS
!
!
Package 1 of 1 contains:
1 - Economizer damper assembly
1 - Outdoor air damper
1 - Return air damper
1 - Gravity exhaust damper
1 - Horizontal blank-off panel
1 - Economizer actuator
1 - Economizer control module
1 - Outdoor air temperature sensor
1 - Hardware bag
1 - Mixed air sensor
3 - #10-14 x 3/4” screws with washer
11 - #10-16 x 5/8” screws
1 - Side economizer panel
1 - Wiring diagram label
Order Of Installation
Economizer
Mixed air sensor
Optional OA and RA sensors
Power Exhaust fans (optional)
Side economizer panel
Shipping and Packing List
Application
The Z1ECON16B-1 (11G98) economizer is used with
ZC,ZG,ZH 092-150 units in horizontal air discharge
applications. Economizer dampers will modulate to maintain
55
o
F (13
o
C) supply air when outdoor air is suitable. The mixed
air temperature sensor measures the supply air sensible
temperature.
An outdoor air sensor is used to determine whether outdoor air
is suitable for free cooling. The outdoor air sensor is factory-
installed in all economizers. Other outdoor and return air (OA
and RA) sensor options are available to determine whether
outdoor air is suitable for free cooling. See Table 1 and the
instructions provided with optional senors.
INDOOR AIR QUALITY SENSOR
An IAQ sensor is used when demand control ventilation (DCV)
is specified. Damper minimum position can be set lower than
traditional minimum air requirements resulting in cost savings.
The IAQ sensor allows the economizer control module to
open dampers to traditional ventilation requirements as room
occupancy (CO
2
) increases.
For proper operation, the IAQ sensor must provide a 2-10VDC,
100 ohm impedance signal. Connect sensor leads to AQ and
AQ1 terminals on the economizer control module located in the
filter section.
TABLE 1
Sensors
Dampers modulate to maintain
55
o
F mixed air (R1) when:
*Single OA Sensible
OA temperature is lower
than free cooling setpoint
Single OA Enthalpy
OA temperature and humidity is
suitable for free cooling
Differential Enthalpy
- 1 in OA & 1 in RA
OA temperature and humidity is
lower than RA temperature and
humidity.
Figure 1
*Single OA sensible sensor is shipped standard on economizer
Cross Reference No. 507401-01
