Trane R Series Installation Operation & Maintenance page 40

Installation - Mechanical
Typically, two regulating valves will be required in parallel, each one
responding to the refrigerant pressure in its corresponding condenser. Install
the valves on the condenser leaving water line. The valves should be located
after the thermometer and before the shutoff valve. Refer to Figure 21. Run
the capillary tubing from the valve to the discharge service valve and attach it
to the non-stem end of the discharge valve access port.
CAUTION:
Equipment Damage!
To prevent refrigerant loss, locate capillary tubing and secure it, to
avoid damage due to friction or vibration.
Insure that the valves are closed to the access port before removing the flare
cap.
WARNING
Prevent Injury!
To prevent injury due to instantaneous release of high pressure
gas and/or contact with refrigerant, be sure the discharge valve
access port is closed off before removing the flare cap.
Loosen the flare caps slowly, to relieve residual pressure and connect the
water regulating valve capillary tubes. Adjust the regulating valves for proper
operation during unit startup.
Figure 21 Typical Water Regulating Valve Installation Single-Circuit RTWA Unit
40 RLC-SVX07A-EN