Electrical Connections - York YAP026 Installation Manual

AFFINITY SERIES OUTDOOR PACKAGED HEAT PUMP INSTALLATION MANUAL

Electrical Connections

General
The heat pump, and if auxiliary heat is installed, must
have a separate electrical service with a field-supplied,
waterproof disconnect switch mounted at, or within sight
of the heat pump.
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.
Unit Power Connection
Connect the incoming line voltage wires to L1 and L2 of
the contactor as shown in Figure 9B for single-phase unit.
Consult the Unit Electrical Data in this manual for correct
fuse sizes.
Open the front access panel. Insert power wires through
knockouts in cabinet. Route wires through left side of
control box and connect to contactor and ground (Figure
9A).
Figure 9A:
Wire access (control box closed)
Wire Insert
Location
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.
208 Volt Operation
All 208/230 units are factory wired for 230 volt operation.
For 208 volt operation, the red and blue transformer wires
must be switched on terminal strip PS.
Figure 9B:
Line Voltage 208-230/60/1 control box
L2
L1
FP
12
L1 L2
5
T1 T2
1
2
3