TriangleTube Prestige Excellence, Руководство по установке и обслуживанию

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cascade Installation
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cascade Installation – System Piping
Standard Cascade installations will utilize a balanced manifold system as
the primary / secondary connection to the system piping as shown in
Figure 6, page 26 or a reverse return piping arrangement as shown in
Figure 8, page 28. Split Cascade installations will utilize a balanced man-
ifold system as the primary / secondary connection to the central heating
loop. Each boiler configured to respond to a domestic hot water call will
also have a direct connection to the indirect water heater as shown in
Figure 10, page 30. Reference the Prestige Installation and Maintenance
Manual for general boiler installation and piping requirements.
cascade Installation – System Sensor Installation
Cascade operation requires a System Temperature Sensor to be installed
on the common supply header downstream of all boilers in the system.
Place the System Temperature Sensor within 10’ of the last boiler in the
Cascade System for an accurate temperature reading. Proper placement
and installation of the System Temperature Sensor is critical for reliable
cascade operation. Two types of System Temperature Sensor are avail-
able:
• Dry Well Installation – Install a 3/8”ID drywell in the common sup-
ply header downstream of all boilers in the system. The drywell
should be long enough to be directly in the water flow for an accu-
rate temperature reading. Insert a temperature sensor PSRKIT22
into the well and wire to terminals 15 & 16 of the Master boiler.
• Pipe Mounted Installation – A temperature sensor PTSENS12 can
be directly strapped to the outside of a 1” to 3” pipe. Install the
PTSENS12 as follows:
1. Remove the white plastic cover from the sensor
2. Cut a small slit in the seal gasket on the end of the sensor.
3. Route 18 AWG 2-wire cable or similar cable through the seal
gasket into the enclosure.
4. Push down on the orange wire terminal retainers to insert the
wires into the sensor terminals. Release the orange wire termi-
nal retainers and confirm that the wires are firmly attached to
the sensor terminals.
5. Select a location for the sensor on the common supply header
downstream of all boilers in the system. Clean the pipe with
fine sandpaper or emery cloth to ensure the pipe is clean and
sensor will make good contact with the pipe.
6. Press the white cover onto the sensor and strap the sensor to the
pipe using the included wire tie.
7. Wire the sensor to terminals 15 & 16 of the Master boiler.
Fig. 5: System Sensor
Dry Well Installation