Condenser Water Regulating Valve; Condenser Water Regulating Valve Adjust- Ment; Partial Heat Recovery Condenser Tube Parts; Full Heat Recovery Condenser Tube Parts - Trane RTHD series Installation, Operation And Maintanance

Installation Mechanical
• Thermometers
• Cleanout tees
• Balancing valve
• Pressure relief valve.
• Flow switch
D CAUTION
Condenser Damage!
To prevent 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). Refer to digit 18 of the Model No.
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 in order to ensure
adequate oil circulation throughout the system.
• The RTHD 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 tem-
perature within 2 minutes of startup. A 25°F diferen-
tial 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 Ad-
justment
A separate TechView Settings Menu tab entitled "Con-
denser Head Pressure Control - Setup" that is only visi-
ble if the configuration is selected, contain 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 incre-
ments, 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
56
10.0 in .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 .1 increments,
Default .5)
• Head Pressure Control Override (enumeration of:
disabled (auto), "off" state, minimum, maximum
(100%),) default :disabled (auto). When this setting is
in "disabled (auto)"
• Condenser Water Pump Prerun Time
Partial Heat Recovery Condenser Tube
Parts
Partial heat recovery condenser should be installed with
a pressure reducing valve to reduce the inlet water pres-
sure. This requirement is only for the design pressure
that the water pressure exceeds the container name-
plate. This is necessary to prevent the valve disc and
valve seat from being damaged by excessive pressure
drop. In addition, it is necessary to limit the water side
pressure of partial heat recovery condenser. Some heat
recovery condenser water side design pressure shown in
the container nameplate.
D WARNING
May Damage The Condenser and
Compressor!
In order to avoid damaging the partial heat recovery
condenser or water flow regulating valve, the inlet
pressure should not exceed the design pressure shown
in the container nameplate.

Full Heat Recovery Condenser Tube Parts

The full heat recovery condenser should be installed
with a pressure reducing valve to reduce the inlet wa-
ter pressure. This requirement is only for the design
pressure that the water pressure exceeds the container
nameplate. This is necessary to prevent the valve disc
and valve seat from being damaged by excessive pres-
sure drop. In addition, it is necessary to limit the water
side pressure of the total heat recovery condenser. The
total heat recovery condenser water side design pres-
sure shown in the container nameplate.
D WARNING
May Damage The Condenser and
Compressor!
In order to avoid damaging the total heat recovery
condenser or water flow regulating valve, the inlet
pressure should not exceed the design pressure shown
in the container nameplate.
RTHD-SVX02H-EN