Installation
WSHP-SVX01Q-EN 59
Control PowerTransformer
The 24 V control power transformers are to be used only
with the accessories called out in this manual. A 50 VA
transformer is externally fused.Transformers rated
greater than 50 VA are equipped with circuit breakers. If a
circuit breaker trips, turn OFF all power to the unit before
attempting to reset it.
The transformer is located in the control panel.
Thermostat Location
Location of the thermostat or zone sensor is an important
element of effective room control.
Areas where the thermostat or zone sensor should not be
located include:
• Behind doors or corners
• Near hot or cold air ducts
• Near radiant heat (heat emitted from appliances or the
sun)
• Near concealed pipes or chimneys
• On outside walls or other non conditioned surfaces
In air-flows from adjacent zones or other units.
Controls Using 24 VAC
Before installing any wire, refer to the electrical access
locations in the “Unit Dimensions,” p. 13 of this manual.
Ensure that the AC control wiring between the controls
and the unit termination point does not exceed 3 Ohms/
conductor for the length of the run.
Check all loads and conductors for grounds, shorts, and
mis-wiring. Use copper conductors unless otherwise
specified. Do not run the AC low-voltage wiring in the
same conduit with the high voltage power wiring.
Low-voltage connection diagrams for basic and deluxe 24
V control packages mounted on .5-6 ton equipment sizes
are shown in Figure 59, p. 59.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
Figure 58. Thermostat/sensor location
5 Feet
YES
NO
NO
NO
NOTICE
Component Failure!
Resistance in excess of 3 Ohms per conductor could
result in component failure due to insufficient AC
voltage supply.
Table 40. 24V AC conductors
Distance from unit to
control Recommended wire size
000-460 ft 18 gauge
461-732 ft 16 gauge
733-1000 ft 14 gauge
Figure 59. Low-voltage connection (GEH/V .5 to 5 ton
and EXH/V
(a)
.5 to 6 ton equipment)
(a)Basic controls not available on EXH/V units
Basic Controls Wall Mounted Thermostat
1TB1
FAN
24 VAC
REVERSING VALVE (COOL)
COMPRESSOR & VAR SPD PUMP SOLENOID
24 VAC GENERAL ALARM OUTPUT
24 VAC COMMON & VAR SPD PUMP SOLENOID
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Deluxe Controls with Reheat
1TB1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
24 VAC
FAN
REVERSING VALVE (COOL)
COMPRESSOR
24 VAC COMMON & VAR SPD PUMP SOLENOID
24 VAC COMPRESSOR DISABLE INPUT
24 VAC COMPRESSOR DISABLE INPUT
HUMIDISTAT
VAR SPD PUMP SOLENOID
ALARM CONTACT OUTPUT
ALARM CONTACT OUTPUT
Deluxe Controls Wall Mounted Thermostat
1TB1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
24 VAC
FAN
REVERSING VALVE (COOL)
COMPRESSOR & VAR SPD PUMP SOLENOID
24 VAC COMMON & VAR SPD PUMP SOLENOID
ELECTRIC HEAT
24 VAC COMPRESSOR DISABLE INPUT
24 VAC COMPRESSOR DISABLE INPUT
ALARM CONTACT OUTPUT
ALARM CONTACT OUTPUT
To Next Page
Loading...
