Manual 2100-317J
Page
14 of 39
THERMOSTAT INDICATORS
8403-058 (TH5220D1151) Thermostat:
Thermostat will display on the screen “Em Heat” when
the thermostat is set on emergency heat.
8403-060 (1120-445) Temperature/Humidity Control:
In heating or cooling, the display may be black and light
gray, or backlit in blue depending on configuration. In
the event of a system malfunction such as a loss of
charge or high head pressure, the heat pump control
board will issue a signal to the thermostat causing the
screen to be backlit in RED and the display to read
“Service Needed”. If this occurs, the control will
continue to function, but you will not be able to make
any adjustments until the problem is corrected and the
fault device is reset.
EMERGENCY HEAT MODE
The operator of the equipment must manually place the
system switch in this mode. This is done when there is
a known problem with the unit.
When the 8403-060 (1120-445) Temperature/Humidity
Control is placed in the Emergency Heat mode, the
display will be backlit in RED to indicate that service is
needed. The display will remain backlit in red until the
mode is switched out of Emergency Heat.
BLOWER CONTROL SETUP
Due to the unique functions that the ECM blower motor
is able to perform each installation requires that the
jumpers on the blower control board be checked and
possibly moved based on the final installation. (See
Figure 5.) Check Table 8 to verify the ADJUST,
HEAT, COOL, and DELAY taps are set in the proper
location for the installation.
HUMIDITY CONTROL
With the use of optional humidistat 8403-038 cut
jumper on blower control board marked “cut to enable”
(refer to
on Figure 5) to allow the humidistat to
reduce the blower airflow in the dehumidify mode. By
reducing the airflow about 15% the air coil runs colder
and thus extracts more moisture. This can increase
latent capacity from 5 to 13% based on the R/H
conditions of the structure being conditioned. Refer to
control circuit diagram for wiring of humidistat.
CFM LIGHT
The light marked CFM on the blower control board
(refer to
on Figure 5) alternates between blinking 1
second per approximately 100 CFM of air delivered by
the blower, and a solid light with 1 second off period
between modes.
TABLE 8
BLOWER CONTROL SETUP
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Summary of Contents for GSVS242-A
Page 16: ...Manual 2100 317J Page 16 of 39...
Page 17: ...Manual 2100 317J Page 17 of 39...
Page 28: ...Manual 2100 317J Page 28 of 39 FIGURE 15...
Page 38: ...Manual 2100 317J Page 38 of 39...
Page 39: ...Manual 2100 317J Page 39 of 39...
