RTHD-SVX01L-EN
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operating safety. These components and their general
locations are given below.
Entering Condenser Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valves. One per each pass
• Thermometers
• Cleanout tees
• Pipe strainer
• Flow switch
Leaving Condenser Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valve - one per each pass
• Thermometers
• Cleanout tees
• Balancing valve
• Pressure relief valve
NOTICE
Condenser Damage!
Failure to follow instructions below could result in
condenser damage.
• Do NOT exceed 150 psig (10.3 bar) water
pressure for standard water boxes. Maximum
pressure for high pressure water boxes is 300
psig (20.7 bar).
• To prevent tube damage, install a strainer in
condenser water inlet piping.
• To prevent tube corrosion, ensure that the initial
water fill has a balanced pH.
Condenser Water Regulating Valve
The Condenser Head Pressure Control Option provides for
a 0-10Vdc (maximum range - a smaller range is adjustable)
output interface to the customer's condenser water flow
device. The condenser water flow device is typically a large
butterfly type (6" or 8") automatic valve for 200 to 400 Ton
chillers.
The following guidelines must be met to ensure adequate
oil circulation throughout the system.
• The chiller must maintain a 23 psid system pressure
differential at all load conditions in order to ensure
adequate oil circulation.
• The entering condenser water temperature must be
above 55°F (12.8°C) or between 45°F (7.2°C) and 55°F
(12.8°C) with a 1°F temperature rise per minute to 55°F
(12.8°C).
• Condenser leaving water temperature must be 17°F
degrees higher than evaporator leaving water
temperature within 2 minutes of startup. A 25°F
differential must be maintained thereafter.
If the above guidelines cannot be met, then some form of
tower water control must be used.
Condenser Water Regulating Valve
Adjustment
A separate Tracer® TU Settings Menu tab entitled
“Condenser Head Pressure Control - Setup” that is only
visible if the configuration is selected, contains the
following settings and manual overrides for user
adjustments and commissioning all under one tab:
• “Off State” Output Command (0-10 Vdc 0.1 volt
increments, Default 2.0 Vdc)
• Output Voltage @ Desired Minimum Flow (Adj: 0 to
10.0 in 0.1 volt increments, Default 2.0 Vdc)
• Desired Minimum Flow (Adj: 0- 100% of full flow in 1%
intervals, Default 20%)
• Output Voltage @ Desired Maximum Flow (Adj: 0 to
10.0 in 0.1 volt increments (or finer), Default 10 Vdc)
• Actuator Stroke Time (Min to Max Range Time) (Adj: 1
to 1000 seconds, in 1 second increments, Default 30s)
• Damping Coefficient (adj: 0.1 to 1.8, in 0.1 increments,
Default 0.5)
• Head Pressure Control Override (enumeration of:
disabled (auto), “off” state, minimum, maximum
(100%),) Default: Disabled (auto).
The following setting is found in the Setpoints tab:
Condenser Water Pump Prestart Time
Note: Default value is 0 minutes. When using head
pressure control, this value must be reset to a
minimum of two times the condenser loop volume
(but no less than one minute). Do NOT leave the
value at 0 minutes.
Water Treatment
NOTICE
Proper Water Treatment Required!
The use of untreated or improperly treated water
could result in scaling, erosion, corrosion, algae or
slime.
Use the services of a qualified water treatment
specialist to determine what water treatment, if any, is
required. Trane assumes no responsibility for
equipment failures which result from untreated or
improperly treated water, or saline or brackish water.
Installation Mechanical
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