Inlet - RBI Futera XLF Series Manual

Figure 10
Typical Primary/Secondary Piping System
NOTES:
1. Boiler circuit piping must be sized large
enough to handle maximum flow through
unit.
2. Boiler pump sized to boiler design flow
requirements.
3. All boilers furnished with factory mounted
outlet water temperature gauge.
4. Boiler pump purging required. use termi-
nals supplied.
5. All primary/secondary piping systems re-
quire a remote operator.
Figure 11
Low Temperature Piping with Thermostatic Valve
(See Notes and Adjustment Procedure)
NOTES:
1. For pump selection consult factory.
2. Boiler pump sized to boiler and thermostatic 3-way valve design flow requirements.
3. Boiler circuit piping must be sized large enough to handle maximum flow through unit.
4. All boilers furnished with factory mounted outlet water temperature gauge.
5. Boiler pump purging required. use terminals supplied.
6. Valve is pre-calibrated for 140 F return temperature.
o
FTXLF-IOM-HN-1-110308 Copyright 2008 Mestek, Inc.
Finned copper tube gas boilers & water heaters – Boiler manual
(See Notes)
These drawings show
suggested piping con-
figuration and valving.
Check with local codes
and ordinances for spe-
cific requirements.
ADJUstment proceDUre
(To maintain inlet temperature
above flue gas dewpoint)
1. T1 is the return water temperature.
2. Minimum temp, T1 = 140
3. Turn heater on and OPEN valves "A"
and "B."
4. After steady-state operation is
reached:
5. If T1 is less than 140 o F, 60
SLOWLY CLOSE valve "B" until T1 rises
to the desired operating temperature
(but NO LESS than the minimum,
140 F, 60 C).
o o
6. If T1 is greater than desired operating
temperature, slowly close valve "A"
until the temperature drops to the
desired operating temperature (but
NO LESS than the minimum, 140
60 o C).
7. Check again after system operating
temperature has stabilized. Then
make final adjustments.
F, 60 C.
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o C:
o F,
17