York YAFT026, Руководство по установке

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Figure 7: Closed Loop Ground Source Application
NOTE: For closed loop systems with antifreeze protection, set
SW2-1 to the “LOOP” (15°F) position. (Refer to the DIP Switch
Settings table in the Aurora Control section.)
Once piping is completed between the unit, pumps and the ground
loop (see figure below), final purging and charging of the loop is
required. A flush cart (or a 1.5 HP pump minimum) is needed to
achieve adequate flow velocity in the loop to purge air and dirt
particles from the loop itself. Antifreeze solution is used in most
areas to prevent freezing. Flush the system adequately to remove
as much air as possible then pressurize the loop to a static pressure
of 40-50 psi (summer) or 50-75 psi (winter). This is normally
adequate for good system operation. Loop static pressure will
fluctuate with the seasons. Pressures will be higher in the winter
months than during the cooling season. This fluctuation is normal
and should be considered when initially charging the system.
After pressurization, be sure to turn the venting (burping) screw in the
center of the pump two (2) turns open (water will drip out), wait until
all air is purged from the pump, then tighten the plug. Ensure that the
loop pumps provide adequate flow through the unit(s) by checking the
pressure drop across the heat exchanger and comparing it to the unit
capacity data in this catalog. 2.5 to 3 gpm of flow per ton of cooling
capacity is recommended in earth loop applications.
NOTE: Additional information can be found in Flow Center
installation manual and Flush Cart manual.
Closed Loop Ground Source Systems
Figure 8b: Primary/Secondary Hook-up
Figure 8a: Primary/Secondary Wiring with Aurora Base
Control (no AXB Board)
CC
T2 T1
Compressor
C
R
S Blue
L1 L2
Black
Red
Tan(6)
Cap
Ext Pump
1/2 hp Total
208-230/60/1
Pump
G
1
2
PB1
1
2
Pump
Circuit
Breaker
Circuit
Breaker
1
5A
5A
Optional Internal
HWG Pump
HWG
Pump
Purple
Hot Water
Limit Switch
130°F
Blue
1
2
3
Cabinet
HW Switch
Field Supplied
Relay for Heat
Pump 1
Field Supplied
Relay for Heat
Pump 2
Heat Pump 1
Contactor Coil
Heat Pump 2
Contactor Coil
Field Supplied
Fuses 5A
Multiple Units on One Flow Center
NOTE: This feature is only available in the Aurora Advanced
Control package (AXB board), NOT the Aurora Base Control (ABC).
When two units are connected to one loop pumping system, pump
control is automatically achieved by connecting the SL terminals on
connector P2 in both units with 2-wire thermostat wire. These terminals
are polarity dependant (see Figure 8b). The loop pump(s) may be
powered from either unit, whichever is more convenient. If either unit
calls, the loop pump(s) will automatically start. The use of two units on
one flow center is generally limited to a total of 20 gpm capacity.
NOTE: To achieve this same feature when heat pumps have only
the Aurora Base Control, follow Figure 8a. Installer will be required
to supply fuses, two relays, and wiring.
Variable Speed Pump Setup
When using a variable speed pump flow center (FCV1-GL, FCV2-
GL, FCV1-GLNP, or FCV2-GLNP) the use of an AID Tool will be
necessary to adjust minimum and maximum flow rates. The factory
default is: minimum=75% and maximum=100% speed levels.
Flexible Duct
Collar
Vibration Absorbing Pad
P/T Plugs
Drain
Desuperheater
Connections
Auxiliary
Heater
Knockout
Low
Voltage to
Thermostat
Unit Supply
Auxiliary Heat
Supply
Insulated piping
or hose kit
Disconnects
(If Applicable)
Unit Power
P/T
TO
LOOP
GeoLink
®
Flow
Center
GeoLink
®
Polyethylene w/
Armaflex
®
Insulation
AFFINITY & AFFINITY ADVANCED SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL
Affinity Series to
Electromechanical Units
To Electromechanical Unit
Affinity YAFV Series Unit #1
with AXB Board
Affiniy Series Unit #1
with AXB Board
Affinity YAFS/T or Affinity YAFV Series
Unit #2 with AXB Board
Affinity YAFV Series to other
Affinity YAFV or Affinity YAFS/T
Series Units
C S
With pump
wired to
Unit 2
With pump
wired to Unit 1
VS PUMP SLAVE
OUT IN C C 1 2
VS PUMP SLAVE
OUT IN C C 1 2
VS PUMP SLAVE
OUT IN C C 1 2