Bosch Greensource CDi TW Series Installation, Operation And Maintenance Manual page 25

Greensource CDi Series TW Model
LED Indicators
LED Color
HEAT Red
COOL
Green
AUTO Yellow
COM
Red
CYC Red
SERVICE
Red
Table 6 LED Indicators
User Adjustable Settings Chart
Settings
TEMP SETTING
40–120° F
Heating and
Cooling
DIFFERENTIAL 1–10° F
MODE Heat, Cool, Auto,
Off
TEMP SCALE
° F, ° C
PUMP MODE
Con (continuous),
Cyc (cycle)
DEAD BAND 1–6° F
AUTO CHANGE 55–85° F
OVER
TEST MODE De (delay) or Nd
(No delay)
COMPRESSOR
Si (Single), DU
(Dual)
MALFUNCTION St (Steady), Pu
(Pulsing)
Table 7 User Adjustable Settings Chart
Greensource CDi Series TW Model
Indication
Indicates that the control is
in the HEATING mode
Indicates that the control
is in the COOLING mode
Indicates that the control
is in the AUTO mode
Indicates that pump(s) are
selected for continuous
operation
Indicates that pump(s) are
selected for cycling
operation
Red LED will turn steady on
or blink to indicate that a
pressure switch has opened
Range Default
1° F
Off
F
Con
3° F
65° F
De
Si
St
Subject to change without prior notice
Water-To-Water Unit Controller | 25
Setting Up The Controller
On unit power up the LED display will show the
software version, temperature differential setting
with the ability for the user to change it for ten
seconds then will display "OFF" and then finally
will display the control temperature of the fluid
being measured (entering fluid, leaving fluid, tank,
etc.) The default setting of the differential is 1
and can be adjusted from 1–10
differential setting is the differential between
set-point temperature and actual on/off
temperature of the machine.
For example:
Cooling set point = 45
°
Differential = 1 F
°
The heat pump will cycle on in cooling at 46
it is a two-stage machine, stage 2 will come on at
48 F or 2 F degrees above set point and one
° °
degree differential. The unit will shut off at set
point.
Heating set point = 120
Differential = 1 F
°
Stage 1 will come on at 119
come at 117 F. Both stages will remain running
°
until set point is achieved. Stage 1 and stage 2 will
cycle on and off according to the lead/lag
programmed interval.
Whenever there is a demand for heating or cooling
and during the first stage of operation the
temperature is not changing, then the control will
activate the second stage after a three-minute
delay from the first-stage activation. This logic will
apply when the control is powered up, on a power
interruption, when the mode function is set to OFF
and then back to either HEAT or COOL and when
switching from heating to cooling or vice versa in
the auto changeover mode.
Heating and cooling set points are adjusted by
selecting each mode on the key pad and then using
the up-down arrows to select the set point. Thus,
push cool mode button and use down arrow to
45 F. Push heat mode button and use up arrow to
°
120 F. The controller can be set to control heating
°
only, cooling only, or auto change modes. The
mode button is pushed until the circular LED is lit
next to the chosen control mode.
F at start up. The
°
F
F. If
°
F
°
F and stage 2 will
°
8733954853 (2020/04)
F
°