2
INSTALLATION
NOTE: If a fully communicating Infinity/Evolution Control is
being used for low ambient cooling, a winter start control is not
required.
For outdoor units with Infinity/Evolution and TechAssist
single--stage control boards and two--stage non--communicating
AC:
1. Mount the winter start control board in outdoor control box
using provided screws. If necessary, mark and drill 1/8”
diameter pilot holes.
2. Connect the following wires to the TDR:
S13” (330 mm) Yellow wire to T1 (24 VAC input)
S13” (330 mm) Brown wire to T3 (24 VAC common)
S13” (330 mm) Blue--tap wire to T2 (N.O. relay contact)
3. Secure the open end of Blue Tap wire to the insulated tap
connector (see Fig. 1). To do this, simply butt the tap--wire
against the wire stop. Fold the top cover half over to meet
the base. Squeeze on the top cover and base with ordinary
pliers until the latch locks. DO NOT place pliers on top of
the raised plastic flange.
4. Identify the LPS (low pressure switch) connector at the
ODU circuit board, and identify the 24vac LPS run--wire
(or main lead) for the pressure switch. The LPS run--wire is
different between circuit boards (see Fig. 3, 4, 5 and 6).
SInfinity/Evolution (HK38EA004) LPS run--wire is
connected to pin #1 (see Fig. 3).
STechAssist (HK35AC005) LPS run--wire is connected to
pin #2 (middle pin) (see Fig. 4).
STwo--stage non--communicating AC LPS run--wire is
located just before quick connect connecting to high
pressure switch (see Fig. 5).
STwo--stage communicating AC (HK38EA016) LPS
run--wire is connected to pin #2 (middle pin, see Fig. 6).
Secure the LPS run--wire by inserting the run--wire into the
remaining open section of connector. Fold the base over to
meet the run--wire section. Squeeze on the base and run--
wire section with ordinary pliers until the latch locks. DO
NOT place pliers on top of the raised plastic flange.
5. Connect the open strip end of 13” (330 mm) Brown wire to
(C) 24vac common side of the ODU and thermostat field
connections.
6. Connect the open strip end of 13” (330 mm) Yellow wire to
(Y single stage and Y1 2--stage) 24vac side of the ODU and
thermostat field connections.
Additional Installation Instructions for Two--stage
Communicating Capable AC Units:
When TDR is in the circuit and allowing the low pressure switch to
be bypassed but is closed, the outdoor transformer may be out of
phase with the indoor transformer causing the ID or OD fuse to
blow.
To eliminate this possibility, the outdoor transformer needs to be
removed from the circuit.
To do this:
1. Remove the red and black wires from the outdoor trans-
former secondary that are attached to SEC 1 and SEC 2 on
the control board.
2. Remove the black wire connected to the primary side of the
transformer and the other side from 11 of the contactor.
Since the transformer powers the outdoor control board and
compressor solenoid, a low voltage control wire will need
to be connected from R on the indoor to the UTIL terminal
on the control board. See Fig. 6.
NOTE: The Winter Start Control time--delay logic is now wired in
parallel with the outdoor unit low--pressure switch. When indoor
thermostat calls, the TDR logic will energize (closing T1, T2) for
approximately 3--minutes bypassing the LPS. After 3--minutes, the
TDR logic will de--energize (opening T1, T2) and the LPS circuit is
restored (see Fig. 2).
Troubleshooting Upon Start--up
If the TDR does not energize, make sure LPS run and tap wires are
not reversed (double check figures below). You can also apply
24vac direct to T1 and T3 to verify that the TDR relay will
energize.
Wire
Contact
Base Wire
Stop
Blue
Tap
Wire
Plastic
Flange
LPS
Run
Wire
Yellow w/ Red
Blue Tap
Wire
A07934
A07944
Fig. 1 -- Installation
(Y) (C)
T1 T2
C
T3
LPS
24 VAC24 VAC
LPS = Low Pressure Switch
C = Contactor Coil
T1 = 24 VAC Input
T2 = Switch Override
T3 = 24 VAC Com
TDR = Time Delay Relay
Circuit Board
A07933
Fig. 2 -- Wiring for Winter Start Control
