Armstrong FLO-RITE-TEMP 665DW Istruzioni per l'installazione e la regolazione - Pagina 15
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Single Wall Heat Exchanger - To remove the tube bundle for cleaning. Simply unbolt the mixing valve
from the shell and move it out of the way. The tube bundle can be pulled out from the valve end (see Table
12-1 for clearance dimensions). Once the tube bundle is out of the shell, unbolt the end cap on the floating
head end and remove to provide straight through cleaning. Reassemble in the reverse order (On the Model
665 dual stem unit when reassembling the tube bundle, make sure that the "TOP" indicator stamped on the
cover and both ends of the tube bundle line up and bundle is reinstalled in the shell with both "TOP" indicators
facing up). New gaskets will be required for this procedure. (Order heat exchanger gasket kit for model
number)
System Isolation
Valve
Bypass to
Drain for
Setting
Setting
Thermometer
Heated
Water
System
Isolation
Valve
Bypass to
Drain for
Setting
Supply
Water
Setting
Thermometer
NOTE: Depending on capacity requirements a parallel water heater installation may also require (2) two PRVs in
parallel. Single wall installation shown - Double wall would be similar. See your Armstrong Representative for
proper reducing valve application.
Armstrong
Pressure Reducing
Valve (if req'd)
Steam In
Armstrong TVS Trap
Thermal
Loops
Thermal
Loops
Vacuum
Breaker
Fig. 15-1
15
Steam Pressure
Gauge
2-15 psig steam
in the shell
Armstrong
Trap
Steam
Pressure
I.B.
Gauge
Thermostatic
Air Vent
2-15 psig steam
in the shell
I.B.
Armstrong
Trap
I.B.
Armstrong
Trap
Safety Relief
Valve