Operating instructions

12
system to run in cooling. The compressor will start after
an anti-short-cycle period of 70 to 130 seconds from its
last shutdown. The anti-short-cycle period is indicated
by the red light on the controller.
• After 5 minutes of cooling operation, check hydronic
side return and supply water temperatures. A water
temperature drop of 10
o
F to 15
o
F is normal (variation in
water temperature and water flow can cause slight
variations). Use a single pressure gauge to check the
fluid pressure drop through the heat exchangers to
ensure proper flow for the system.
• Set the system and the setpoint for normal operation.
• Instruct the owner on correct operation of the entire heat
pump system. The unit is now operational.
XI. SERVICE and LOCKOUT
LIGHTS
Properly installed, the ECONAR Ultra heat pump requires
only minor maintenance, such as periodic cleaning of the
ground water heat exchanger for heat pumps installed in
ground-water applications. Setting up regular service
checkups with your Enertech dealer could be considered.
Any major problems with the heat pump system operation
will be indicated on the lockout lights.
CAUTION – During evacuation of refrigerant of a
system not having antifreeze protection of either the
ground-side or the hydronic-side, water in the unprotected
heat exchanger must be removed or continuously flowing to
avoid a potential heat exchanger failure caused by freeze
rupture.
Important – Always install a new filter/dryer after
replacing a refrigeration component (compressor, etc.).
The heat pump controller (and a room thermostat, if part of
the system installation) will display a system lockout. If
lockout occurs, follow the procedure below:
1) Determine and record which indicator lights on the
Controller are illuminated. (Refer to Section XIV for
more information on possible causes of Lockout
Conditions.)
2) Check for correct water supply from the ground loop.
3) Check for correct water supply on the hydronic side.
4) Reset the system by disconnecting power at the circuit
breaker for one minute and then reapplying.
5) If shutdown reoccurs,  call your Enertech dealer. Do
not continuously reset the lockout condition or
serious damage may occur.
Note – Improper fluid
flows or incorrect antifreeze levels are the cause of
almost all lockouts.
XII. ROOM THERMOSTAT
OPERATION
Installations may include a wide variation of available
electronic room thermostats, and most of them require to be
configured by the Installer (according to the Installation
Guide included with the thermostat) and checked out after
being installed.
Important – At a minimum:
1. Ensure the thermostat is set up for the
“System Type” it is installed on.
2. Ensure the thermostat is configured for “Manual
Heat/Cool Changeover.”
3. Change other Installer Settings only if necessary.
4. Remember to press “Done” to save the settings and to
exit “Installer Setup.”
5. Run the system through all modes of operation in the
thermostat instructions to ensure correct operation.
If you have additional questions, please refer to the
installation manual that was sent with the thermostat.