11
ECO-Y INSTALLATION MANUAL
Typical open loop piping is shown below. Always maintain water
pressure in the heat exchanger by placing water control valves at
the outlet of the unit to prevent mineral precipitation. Use a closed,
bladder-type expansion tank to minimize mineral formation due to
air exposure. Insure proper water flow through the unit by checking
pressure drop across the heat exchanger and comparing it to the
figures in unit capacity data tables in the specification catalog. 1.5-
2 GPM of flow per ton of cooling capacity is recommended in open
loop applications.
Flexible
Duct Collar
Vibration
Absorbing Pad
P/T Plugs
Drain
Hot Water Generator
Connections
Auxiliary
Heater
Knockout
Low Voltage
to Thermostat
and Valve
Unit Supply
Aux. Heat Supply
Water Out
Water In
Shut Off Valves
Boiler Drains
For HX Flushing
Disconnects
(IfApplicable)
Rubber Bladder
Expansion Tank
Solenoid
Valve
Shut Off Valves
(to isolate solenoid
valve while acid flushing)
Strainer
Flow Control
Valve
(on outlet of
Solenoid Valve)
Compressor
Line Voltage
Open System - Groundwater Application
Open Loop Ground Water Systems
Discharge water from the unit is not contaminated in any manner
and can be disposed of in various ways, depending on local codes,
i.e. recharge well, storm sewer, drain field, adjacent stream or
pond, etc. Most local codes forbid the use of sanitary sewer for
disposal. Consult your local building and zoning departments to
assure compliance in your area.
NOTE:
For open loop/groundwater systems or systems that do not
contain an antifreeze solution, set SW1-Switch #2 to the “WELL”
position. Slow opening/closing solenoid valves (type VM) are
recommended to eliminate water hammer.
CC-GND
CC
Logic Board
VM valve
Violet
CC
Violet
CC-GND
CC
Logic Board
Violet
CC
SV
Violet
Open Loop Solenoid Valve Connection Option
Typical slow operating external 24V water solenoid valve
(type VM) wiring and one (1) quick operating valve.
Open Loop Solenoid Valve Connection Option
Typical quick operating external 24V water solenoid valve
(type PPV100 or BPV100) wiring.
CC-GND
CC
Logic Board
VM valve
Violet
CC
Violet
CC-GND
CC
Logic Board
Violet
CC
SV
Violet