Operating instructions

16
pressure exceeds 400 psi or goes below 25 psi. If the
system exceeds 400 psi, the high-pressure switch will trip
and lock the unit off until power has been disconnected at
the circuit breaker for approximately one minute. System
pressures below 25 psi in the heating mode will trip the
low pressure switch and lock the unit out until the power
supply has been de-energized for one minute. On a well
water system, the freeze protection switch (field installed
part number 75-1028) will activate the lockout at 35 psi in
the heating mode to protect the water coil against freeze
rupture. After resetting a lockout (by disconnecting
power to the unit) verify that water flow is at the
recommended levels before energizing the compressor.
DO NOT reset a well water system without verifying
water flow. DO NOT reset the system more than once.
,Repeated resetting of the lockout can cause serious
damage if the reason for lockout is not corrected.
1 - If lockout occurs more than once contact your
ECONAR dealer immediately. 
X. SERVICE
Regular service to a GeoSource 2000 hydronic heat pump
is very limited. Setting up regular service checkups with
your ECONAR dealer could be considered. Any major
problems with the heat pump system operation will be
indicated on the thermostat lockout light.
A. Lockout Lights
A lockout light on the thermostat will light to indicate
major system problems. If lockout occurs, follow the
procedure below:
1) Check for correct water supply from the earth loop or
well water system.
2) Reset the system by disconnecting power at the
circuit breaker for one minute and then reapplying
power.
3) If shutdown reoccurs, check the indicator lights on
the controller in the unit and review the lockout
troubleshooting guide in section XI of this manual.
4) If lockouts persist, call your ECONAR dealer. Do
not continuously reset the lockout condition or
damage may occur.
XI. THERMOSTAT
OPERATION
This section covers basic operation of the standard 2-heat
1-cool thermostat that ECONAR carries. This thermostat
is ECONAR part number 70-2002, Honeywell part
number T8511G. If your thermostat is a different style,
please refer to the instructions supplied with that
thermostat.
The settings of the thermostat are controlled with the
“System”, “Fan”, “i”, up key, and down key buttons. The
System and Fan buttons are located behind the flip-down
panel.
By pressing the “System” button, you can control the
mode that the thermostat operates in. The five system
settings are:
1. Em. Heat – Controls backup heating. In this mode,
the heat pump’s compressor is locked out, and only
the backup heating elements (if installed) operate.
2. Heat – Controls normal heating operation.
3. Off – Both heating and cooling are off.
4. Cool – Controls normal cooling operation.
5. Auto – The thermostat automatically changes
between heating and cooling operation, depending
on the indoor temperature.
Note: When the thermostat is set to Auto, there must be
at least a 2
o
F difference between the Heating setpoint
temperature and the Cooling setpoint temperature.
The “Fan” button controls the operation of the heat
pump’s blower. The Fan button has two settings:
1. On – The blower operates continuously.
2. Auto – The blower operates with either a heating or
cooling call.
By pressing the “i”, or information, key, you can cycle
through your temperature setpoints. If you wish to
change a temperature setting, press either the up key or
down key when the appropriate mode is displayed. For
example, you wish to change the heating setpoint from
68
o
F to 70
o
F. Push the “i” key until the heating setpoint
appears on the LCD display. Then, press the up key until
the desired setpoint is reached. The thermostat will
automatically switch back to the room temperature
display after a few seconds.
If the LED on the bottom of the thermostat is lit, your
heat pump has locked itself out to protect itself. If this
occurs, please see the Compressor Lockout section of this
manual.
If you have additional questions about your thermostat,
please see the installation manual that was sent with the
thermostat.