Bosch ES025 Installation And Maintenance Manual page 10

10 | Thermostat Connections
EM (Red) Emergency Heat On
W1 (Red Auxiliary Heat On
O (Green) Reversing Valve Energized, unit is
in Cooling Mode
Y2 Second Stage Compressor On
(Green)
Y1 First Stage Compressor On
(Green)
G (Green) Fan On
Just above the connector block is a single red
LED labeled CFM that will blink intermittently
when the unit is running and may flicker when
the unit is off.
This LED indicates the air delivery of the blower at
any given time. Each blink of the LED represent
approximately 100 CFM of air delivery so if the LED
blinks 12 times, pauses, blinks 12 times, etc. the
blower is delivering approximately 1200 CFM.
Refer to Figure #9 for factory programmed air
delivery settings for the ES Series.
To the right of the thermostat connection block is
a green LED labeled dehumidify.
Just above and to the right of the thermostat connection
block are four sets of jumper pins labeled ADJ,
DELAY, HEAT and COOL. The ADJ set of pins are
labeled NORM, (+), (-) and TEST. ES units will all
be set on the NORM position from the factory,
however, airflow can be increased (+) or
decreased (-) by 15% from the pre-programmed
setting by relocating the jumper in this section.
Heater
Model
Fan
Only
ES025 450
ES035 700
ES049 900
ES061 1200
ES071 1600
T111970291 (2015/01)
Y1 Y2
Cool/ Cool/ AUX
Heat Heat Heat
500 800 800
800 1200 1200
1000 1600 1600
1400 2000 2000
1600 2200 2200
Figure # 12 Motor Profile Air Flow CFM Two Stage Units
Subject to change without prior notice
The TEST position is used to verify proper motor
operation. If a motor problem is suspected, move
the ADJ jumper to the TEST position and energize
G on the thermostat connection block. If the motor
ramps up to 100% power, then the motor itself is
functioning normally. Always remember to replaES
the jumper to NORM, (+) or (-) after testing and
reset the unit thermostat to restore normal
operation.
Do not set the ADJ DIP switch to the (-)
setting when electric heaters are installed.
Doing so may cause the heaters to cycle on
their thermal overload switches, potentially
shortening the life of the switches.
The other DIP switch bank is used to select the
proper program in the ECM motor for the unit.
Refer to Figure #7 for the proper jumper
placement.
WARNING: Always disconnect power
before changing jumper positions on the
interface board and reset the unit
afterward.
WARNING: Remember to always turn
off unit power at the circuit breaker
before attaching or disconnecting any
wiring from these connections to avoid
accidental short circuits that can
damage unit control components.
To the left of the red and green status LED's is a
row of 1/4" male quick connects. These are used
to pass thermostat inputs on to the rest of the
control circuit.
EMERG PLUS MINUS
Heat Adj
800 900 700
1200 1400 1000
1600 1800 1400
2000 2100 1900
2200 2300 1900
ES Series
TAP
COOL/
HEAT/
Adj DELAY
A
A
B
A
A
ES Series