Installation manual

11
Figure 6: Typical Split System Application Open Loop -
Well Water
Open Loop - Well Water Systems
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. Ensure 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.
Discharge water from the unit is not contaminated in any manner
and can be disposed of in various ways, depending on local codes,
Figure 7c: Open Loop Solenoid Valve Connection Option
Typical slow operating external 24V water solenoid valve
(type VM) wiring.
Figure 7a: Open Loop Solenoid Valve Connection Option
Typical quick operating external 24V water solenoid valve
(type PPV100 or BPV100) wiring.
NOTE: SW2-4 and SW2-5 should be “OFF” to cycle with
the compressor.
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 SW2-Switch #1 to the “WELL”
(30°F) position. (Refer to the DIP Switch Settings table in the
Aurora Control section.) Slow opening/closing solenoid valves
(type V or VM) are recommended to eliminate water hammer.
Acc Com
Acc NC
Acc NO
1
2
3
C
R
P1
P2
SV
Solenoid
Valve
ABC Board
NOTE: SW2-4 should be “ON” and SW2-5 should be “OFF” when
using a slow opening (V or VM) water valve.
C
R
Acc Com
ACC NC
Acc NO
VM Valve
ABC Board
Figure 7b: Open Loop Solenoid Valve Connection Option
Typical slow operating external 24V water solenoid valve
(type V) wiring.
C
R
Acc Com
ACC NC
Acc NO
C
W/Y
V Valve ABC Board
Vibration Absorbing Pad or Air Pad
P/T Plugs
Disconnect
Thermostat Wire
From Air Handler
Boiler Drains for
System Flushing
Water Solenoid
Control Valve
Rubber Bladder
Pressure Tank
Lineset
To Air Handler
Flow
Regulator
Shut-Off Valves
Water Out
Water In
From W ell
AFFINITY INDOOR SPLIT SERIES INSTALLATION MANUAL