Open Loop Ground Water Systems - York YACT038-072 Installation Manual

AFFINITY COMBINATION INSTALLATION MANUAL

Open Loop Ground Water Systems

Typical open loop piping is shown in the Open System:
Ground Water Application. 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. Ensure proper water flow
through the unit by checking pressure drop across the heat
exchanger and comparing it to the figures in the pressure
drop tables. Normally about 2 GPM flow rate per ton of
cooling capacity (1.5 GPM per ton minimum at 50° F) is
needed in open loop systems.
Open Loop Solenoid Valve Connection Option
Typical slow operating external 24V water solenoid valve
(type V) wiring.
C
R
C
W/Y
CC
V Valve
Open System: Ground Water Application
Aux. Heat
Supply
Unit
Supply
Disconnects
(If Applicable)
Unit
Low Voltage
Power to Thermostat
and Valve
Vibration
Absorbing Pad
NOTES: For open loop ground water systems or systems
that do not contain and antifreeze solution, set SW2-#2 to
the "Well" position.
Flexible Duct
Collar
Rubber Bladder
Auxiliary Expansion Tank
Heater
Knockout
Solenoid
Valve
Shut Off Valves
(to isolate solenoid
valve while acid flushing)
Strainer
Boiler Drains
Drain
P/T Plugs
For HX Flushing
Discharge water from the unit is not contaminated in any
manner and can be disposed of in various ways such as
recharge well, storm sewer, drain field, adjacent stream or
pond, etc. depending on local building codes. Most local
codes forbid the use of sanitary sewer for disposal. Consult
your local building and zoning department to ensure
compliance in your area.
Open Loop Solenoid Valve Connection Option
Typical quick operating external 24V water solenoid valve
(type PPV100 or BPV100) wiring.
SV
Solenoid
Valve
Open Loop Solenoid Valve Connection Option: Wiring
diagram for dual water valve installations, one type V
slow operating solenoid and one BPV100/PPV100 quick
operating solenoid.
C
W/Y
Flow Control Valve
(on outlet of
Solenoid Valve)
Water Out
Water In
Shut Off Valves
Taco Valve
V100FPT
(Type V)
10
C
P1
R
CC
CC SV
Compressor
BPV/PPV
Contactor
Solenoid
Coil
CCG or CC GND
CC
CC2 or CCHI
Logic Board