Electrical Connections - Geostar ASTON Series Installation Manual

Electrical Connections

General
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 13B for single-phase unit.
Consult the Unit Electrical Data in this manual for correct
fuse sizes.
Open front access panel. Insert power wires through
knockouts on the bottom side of cabinet (Figure 13A).
Route wires through the bottom of the control box and
connect to contactor and ground (Figure 13B).
Figure 13A:
Wire access (control box open)
ASTON & ASTON ADVANCED DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL
Wire Insert
Location
11
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 #2 and #3 of P2.
When powering high VA draw components such as
electronic air cleaners or VM 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.
Figure 13B:
Line Voltage 208-230/60/1 control box
PB1
AXB
ABC
L2 L1
T2 T1