Installation manual

Electrical - Low Voltage Wiring
From Water Source
IN
OUT
NOTE: Shut-off valves, strainers and
other re
q
uired com
p
onents not shown.
Solenoid
Valve
Flow
Regulator
To Discharge
Stage 1
Stage 2
Figure 27: Two-Stage Piping
ELECTRICAL - THERMOSTAT WIRING
ѥCAUTION! ѥ
ѥCAUTION! ѥ
Electrical
Low
Vo
Electrical Low Vo
W
IRIN
G
Thermostat Installation
The thermostat should be located on an interior wall in a
larger room, away from supply duct drafts. DO NOT locate
the thermostat in areas subject to sunlight, drafts or on
external walls. The wire access hole behind the thermostat
may in certain cases need to be sealed to prevent erroneous
temperature measurement. Position the thermostat back
plate against the wall so that it appears level and so the
thermostat wires protrude through the middle of the back
plate. Mark the position of the back plate mounting holes and
drill holes with a 3/16” (5mm) bit. Install supplied anchors and
secure plate to the wall. Thermostat wire must be 18 AWG
wire. Wire the appropriate thermostat as shown in Figures
28a through 28c to the low voltage terminal strip on the CXM
control board. Practically any heat pump thermostat will
work with these units, provided it has the correct number of
heating and cooling stages.
Y2
Y1
G
R
C
Y2
Y1
G
R
C
TAH Air
Handler
T-Stat
ATP32U03
ATP32U04
Y1
Y2
G
R
C
A
L
Terminal
Blocks in
Compressor
Section
Fan Control
Board
O OO
W
W
W
A
C01
C01
FP
FP
FP
FP
+V
+V
W1
W1
W2
W2
Figure 28a: Typical Thermostat Wiring, TAH AHU with
AHU32U03/4
IMPORTANT: Violet jumper from FP to FP on Terminal
block 2 in compressor section must be removed when
unit is installed with TAH air handler or when FP2
sensor is Ä eld installed on existing air handler.
See equipment wiring diagram for more details.
Residential Split Units - 60Hz Puron
®
Rev.: 6 Dec., 2011
36
CAUTION! Many units are installed with a factory or ¿ eld
supplied manual or electric shut-off valve. DAMAGE WILL
OCCUR if shut-off valve is closed during unit operation. A
high pressure switch must be installed on the heat pump
side of any ¿ eld provided shut-off valves and connected to
the heat pump controls in series with the built-in refrigerant
circuit high pressure switch to disable compressor
operation if water pressure exceeds pressure switch
setting. The ¿ eld installed high pressure switch shall have
a cut-out pressure of 300 psig and a cut-in pressure of
250 psig. This pressure switch can be ordered with a 1/4”
internal À are connection as part number 39B0005N02.
CAUTION! Refrigerant pressure activated water regulating
valves should never be used with the equipment.