Service Valves; Open The Service Valves; Electrical - Low Voltage; Low Voltage Maximum Wire Length - ComfortStar 18 Installation Manual

10 SERVICE VALVES

10.1 Open the Service Valves

WARNING
Extreme caution should be exercised when
opening the Liquid Line Service Valve. Turn
counterclock wise until the valve stem just
touches the rolled edge. No torque is required.
Failure to follow this warning will result in abrupt
release of system charge and may result in
personal injury and /or property damage.
NOTE
Leak check and evacuation must be completed
before opening the service valves.
1. Remove Service Valve Cap (Fig. 10-1).
2. Fully insert hex wrench into the stem and back out
counterclockwise until valve stem just touches the
rolled edge.
3. Replace the valve stem cap to prevent leaks.
Tighten finger tight plus an additional 1/6 turn.

11 ELECTRICAL - LOW VOLTAGE

11.1 Low Voltage Maximum Wire Length

Table 11-1 Defines the maximum total length of low voltage wiring from the outdoor unit to the indoor unit and to the thermostat.

11.2 Low Voltage Hook-up Diagrams

Air Handler Hook-up Diagram
Figure 11-1
24 Volts - Wire Size
18 AWG
16 AWG
14 AWG
Table 11-1
Power wiring
Low Voltage connection must be made inside the outdoor unit case.
09
Cap
Unit S ide
of Service
Valve
Service Port
Figure 10-1
Max. Wire Length
150 Ft.
225 Ft.
300 Ft.
Control wiring
5/16" Hex Wrench
for Sucti on Service Valve
3/16" Hex Wrench
for Liqu id Service Valve
Roll ed Edge to
Capti vate Stem
Hex Headed
Valve System
Access Panel