York AFFINITY OptiHeat YAW040, Installation Manual

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21
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.
The load pump directly connects to the PB1 terminal block.
Do not wire variable speed pumps in this manner. See
schematics for VS pump wiring.
Control Box Relocation
The control box can be installed on the rear non water
line side 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 temperature sensor
d) Load temperature sensor
e) Compressor wires
4. Remove the five screws from the control box. (3 hinge-
side, 2 in opposite corner posts.)
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. Secure all wires so they do not come in contact with
refrigerant lines.
8. Move the RS485 Keystone coupler to the opening on the
back side of the unit.
9. Replace the top of the unit.
10. Replace both access panels.
11. Reapply power sources.
AFFINITY SINGLE STAGE HYDRONIC WITH OPTIHEAT INSTALLATION MANUAL