Trane RTHC - Making Grooved Pipe Connections; Leaving Chilled Water Piping; Vents and Drains; Entering Chilled Water Piping

Installation, Operation and Maintenance 2 - 23
Making Grooved Pipe Connections
CAUTION
CAUTION: To prevent damage to
water piping, do not overtighten con-
nections.
NOTE: Make sure that all piping is flushed and
cleaned prior to starting the unit.
CAUTION
CAUTION: To prevent equipment
damage, bypass the unit if using an
acidic flushing agent.
Vents and Drains
Install pipe plugs in evaporator and condenser water
box drain and vent connections before filling the
water systems.
To drain water, remove vent and drain plugs, install a
NPT connector in the drain connection and connect a
hose to it.
Evaporator Piping Components
NOTE: Make sure all piping components are
between the shutoff valves, so that isolation can be
accomplished on both the condenser and the
evaporator.
“Piping components” include all devices and controls
used to provide proper water system operation and
unit operating safety. These components and their
general locations are given below.
Entering Chilled Water Piping
q Air vents (to bleed air from system)
q Water pressure gauges with shutoff valves
q Pipe unions
q Vibration eliminators (rubber boots)
q Shutoff (isolation) valves
q Thermometers
q Cleanout tees
q Pipe strainer
q Flow switch
Leaving Chilled Water Piping
q Air vents (to bleed air from system)
q Water pressure gauges with shutoff valves
q Pipe unions
q Vibration eliminators (rubber boots)
q Shutoff (isolation) valves
q Thermometers
q Cleanout tees
q Balancing valve
q Pressure relief valve
CAUTION
CAUTION: To prevent evaporator
damage, do not exceed 150 psig (10.3
bar) evaporator water pressure for
standard water boxes. Maximum
pressure for high pressure water
boxes is 300 psig (20.7 bar). Refer to
digit 14 of the Model No.
To prevent tube damage, install a
strainer in the evaporator water inlet
piping.
To prevent tube corrosion, ensure
that the initial water fill has a bal-
anced pH.
Condenser Piping Components
“Piping components” include all devices and controls
used to provide proper water system operation and
unit operating safety. These components and their
general locations are given below.
Entering condenser water piping.
q Air vents (to bleed air from system)
q Water pressure gauges with shutoff valves
q Pipe unions
q Vibration eliminators (rubber boots)
q Shutoff (isolation) valves. One per each pass
q Thermometers