10.
Circulator
: The boiler circulator is to be sized to
overcome the pressure drop of the system while
providing the flow required by the boiler.
a. If the boiler is piped in a secondary loop of a
primary/secondary heating system, the circulator
will need only to overcome the resistance of the
boiler and any fittings in that loop.
b. The circulator should be sized based on gross
output of the boiler. Table 4.3 shows the Boiler
Output as reported to the Hydronics Institute
Section of AHRI.
c. The required flow is calculated based on the design
temperature difference from the return to the supply
of the boiler. For a PF-110 with a design temperature
difference of 20°F the calculation is as follows.
Output
101,000
Required Flow =
________
=
_________
= 10.1 GPM
Δ
T
x 500
20 x 500
19
WATER PIPING AND CONTROLS
P
URE
F
IRE
®
Model
Boiler Input
Btu/hr (kW)
Gross Output
Btu/hr (kW)
PF-50
50,000 (14.7)
46,000 (13.5)
PF-80
80,000 (23.4)
74,000 (21.7)
PF-110
110,000 (34.2)
102,000 (29.9)
PF-140
140,000 (41.0)
131,000 (38.4)
PF-200
199,000 (58.3)
183,000 (53.6)
PF-210
210,000 (61.5)
193,000 (56.6)
PF-300
300,000 (87.9)
289,000 (84.9)
PF-399
399,000 (116.9)
373,000 (109.3)
Table 4.3: Boiler Inputs and Outputs
Figure 4.4:
P
URE
F
IRE
®
Circulator Sizing Graph (General Pump – Primary/Secondary)
3UHVVX
UH
'
UR
S
)
WR
I
:
D
WH
U
)ORZ5DWH*30
PF
-50
PF
-140
PF
-110
PF
-80
PF
-200
PF
-210
PF
-300
PF
-399
PF
-460
Figure 4.2: Relief Valve Installation – PF-50, PF-80,
PF-110 & PF-140
Figure 4.3: Relief Valve Installation – PF-200, PF-210,
PF-300, PF-399 & PF-460
Summary of Contents for PureFire PF-110
Page 77: ...75 REPAIR PARTS Figure 13 3 General Repair Parts PF 200 PF 210 PF 300 PF 399 ...
Page 82: ...80 APPENDIX A STATUS SCREENS APPENDIX A STATUS SCREENS ...
Page 83: ...81 APPENDIX A STATUS SCREENS ...
Page 84: ...82 APPENDIX A STATUS SCREENS ...
Page 85: ...83 APPENDIX A STATUS SCREENS ...
Page 86: ...84 APPENDIX B USER MENU APPENDIX B USER MENU ...
Page 87: ...85 APPENDIX C INSTALLER MENU APPENDIX C INSTALLER MENU ...
Page 88: ...86 APPENDIX C INSTALLER MENU ...
Page 89: ...87 APPENDIX C INSTALLER MENU ...
Page 90: ...88 APPENDIX C INSTALLER MENU ...
Page 91: ...89 APPENDIX C INSTALLER MENU ...