Electrical Data - York YAWS018 - 075 Installation Manual

Electrical Data cont.
208 Volt Operation
All 208-230 volt units are factory wired for 230 volt
operation. To convert the unit from a 230V unit to a 208V
unit follow these steps:
1. Remove the blue transformer wire from terminal L2 on
the compressor contactor and secure the wire taking
care to insulate the end with electrical tape.
2. Locate the red transformer wire and connect it to the L2
terminal of the compressor contactor.
Electrical
Be sure the available power is the same voltage and phase
as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or the
National Electric Code, whichever is applicable. Refer to
the Electrical Data table for wire and fuse or circuit breaker
sizing information.
Flow Center Pump Connection (208-230/60/1)
Two circuit breaker protected internal terminal block
connections with 1/4-inch spade connectors are provided;
one for the load pump and one for the source pump. The
source pump directly connects to the PB2 terminal block
for the source pump. The load pump directly connects to
the PB1 terminal block for the load pump.
Accessory Relay
A set of "dry" contacts has been provided to control
accessory devices, such as water solenoid valves on open
loop installations, electronic air cleaners, humidifiers, etc.
This relay contact should be used only with 24 volt signals
and not line voltage power. The relay has both normally
open and normally closed contacts and can operate with
either the fan or the compressor. Use DIP switch SW2-4
and 5 to cycle the relay with blower, compressor, or control
a slow opening water valve. The relay contacts are available
on terminals #1 and #3 for normally closed, and #2 and #3
for normally open on P2.
A second configurable accessory relay is provided on the
AXB board, if installed. When powering high VA draw
components such as electronic air cleaners or V type open
loop water valves, R should be taken 'pre-fuse' from the 'R'
quick connect on the ABC board and not the 'post-fuse' 'R'
terminal on the thermostat connection. If not, blown ABC
fuses might result.
AFFINITY SINGLE STAGE HYDRONIC INSTALLATION MANUAL
Control Box Relocation
The control box can be installed on the rear of the unit. To
relocate the control box, follow the procedures below.
1. Remove all power sources to the unit.
2. Remove the unit's top panel.
3. Cut all plastic wire ties to the following:
a) High pressure switch (black wires)
b) Low pressure switch (blue wires)
c) Freeze sensing and thermistors
d) Compressor wires
4. Remove the four screws from the control box.
5. Relocate the control box to opposite end of the unit.
6. Using the screws removed in step 4 above, reattach the
control box.
7. Move the RS485 Keystone Coupler to the opening on the
back side of the unit.
8. Secure all wires so they do not come in contact with
refrigerant lines.
9. Replace the top of the unit.
10. Replace both access panels.
11. Reapply power sources.
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