13
Option 1: Mounting Sensor to the Adjacent
Building Structure
1. The recommended wall for mounting the sensor is the north
side of the building. The mounting height should be at 2 to
3 ft above ground level, or all the way up into the eave. The
effect on the sun warming on the 3 walls (i.e. South, West
and East) can produce unacceptable temperature errors
under the right conditions. The sensor should be mounted
inside an ordinary or weatherproof outlet box. (See Fig. 12.)
2. Remove the Control access panel. The OAT Package is in a
bag located in Controls compartment. (See Fig. 13.)
3. Use the supplied clip, snap the sensor into the clip making
sure most of the sensor remains exposed, (not fully covered
by the clip). Ensure the mounting surface where the clip and
sensor will be located is clean and dry. To place the clip and
sensor, remove the protective paper exposing the clips
adhesive. Place on desired surface and hold in place for 5 to
10 seconds, ensuring positive contact.
4. Using the supplied wire nuts, connect sensor with splice
wires as required. Solid thermostat or stranded, 22 AWG (or
heavier wire) may be used for splicing. Connections should
be located within an outlet box or within the inside wall
(check your local codes). (See Fig. 12.)
5. Route the sensor wires around the unit through the control
wires entry. Connect the sensor wires to the black wire
pigtails in the control compartment. (See Fig. 13 and Fig.
14.)
Advantages:
S
This is the most accurate way of reading outdoor temperature.
Disadvantages:
S
This application requires dedicated wire between the sensor
location and the indoor termination point.
EXTERIOR
WALL
FIELD-SUPPLIED
OUTLET BOX
COVER
SENSOR
A98288
Fig. 12 -- Mounting Sensor to Outside Wall
ACCESSORY INSTALLATION
A. Humidifier Connections
The furnace control board terminal marked HUM is provided for
low voltage (24--vac) control of a humidifier. No humidistat is
required as UI monitors indoor humidity.
When commanded to operate humidifier, the unit control will
energize the HUM output to turn humidifier on and de--energize
HUM output to turn humidifier off. Wire HUM and COM
terminals directly to humidifier as shown in Fig. 14.
B. Electronic Air Cleaner
Electronic Air Cleaner terminals are provided on the Evolution
Control Board (EAC--1 and EAC--2). While these terminals can be
used to power a 230V EAC, it is recommended that any EAC be
installed per the EAC installation instructions and connected
separately to a standard 115V or 230V outlet with an airflow
sensor to control operation of the EAC.
SPECIAL PROCEDURES FOR 208--V OPERATION
Be sure unit disconnect switch is open.
Disconnect the black primary lead from the transformer. See unit
wiring label (See Fig. 17 and 18).
Connect the black primary lead to the transformer terminal labeled
200--v.
Option 2: Mounting Sensor Under the Outdoor
Unit
1. The sensor should be mounted under the northeast corner of
the unit. Mount the sensor on the unit in the area not
exposed to sunlight.
2. Remove the Control access panel. The OAT Package is in a
bag located in Controls compartment. (See Fig. 13.)
3. Using the supplied clip, snap the sensor into the clip making
sure most of he sensor remains exposed, (not fully covered
by the clip). Ensure the mounting surface where the clip and
sensor will be located is clean and dry. To place the clip and
sensor, remove the protective paper exposing the clips
adhesive. Place on desired surface and hold in place for 5 to
10 seconds, ensuring positive contact.
4. Using the supplied wire nuts, connect sensor with splice
wires as required. Solid thermostat or stranded, 22 AWG (or
heavier wire) may be used for splicing. Connections should
be located within an outlet box (check your local codes).
Sensor and wires must be protected from the damage due to
animals and power equipment.
5. Route the sensor wires around the unit through the control
wires entry. Connect the sensor wires to the black wire
pigtails in the control compartment. (See Fig. 13 and Fig.
14.)
Advantages:
S
Convenient mounting and wiring of outdoor air temperature
sensor.
Disadvantages:
S
The sun may have some effect when unit is not running.
S
Defrost cycle (if heat pump) can introduce a small temperature
error while defrosting.
S
Snow and ice buildup under the outdoor unit may introduce
error.
S
Landscaping around outdoor unit may affect temperature
reading.
677D
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--
A
Содержание 677D--A
Страница 5: ...5 A09561 Fig 5 677D A24 30 Unit Dimensions 677D A...
Страница 6: ...6 A09562 Fig 6 677D A36 60 Unit Dimensions 677D A...
Страница 18: ...18 A10217C Fig 17 Connection Wiring Schematic 677D A Single Phase Gas Inputs 040 060 090 kBtu hr 677D A...
Страница 19: ...19 A10217L Fig 16 Cont Ladder Wiring Schematic 677D A Single Phase Gas Inputs 040 060 090 kBtu hr 677D A...
Страница 20: ...20 A10219C Fig 18 Connection Wiring Schematic 677D A Single Phase Gas Inputs 115 130 kBtu hr 677D A...
Страница 21: ...21 A10219L Fig 17 Ladder Wiring Schematic 677D A Single Phase Gas Inputs 115 130 kBtu hr 677D A...
