7. All piping must be fully supported. Use pipe hangers
at a minimum of 4 foot (1.22 meter) intervals to
prevent sagging of the pipe.
Tous les tuyaux doivent être parfaitement soutenus.
Utiliser des attaches de tuyau tous les 4 pieds (1,22
mètres) pour éviter le fléchissement des tuyaux.
8. Exhaust and air inlet piping is to be supported
separately and should not apply force to the boiler.
Les tuyaux d’évacuation et d’arrivée d’air doivent
avoir des dispositifs de support distincts et ne pas
exercer de pression sur la chaudière.
9. Penetration openings around the vent pipe and air
intake piping are to be fully sealed to prevent exhaust
gases from entering building structures.
10. PVC & CPVC Piping:
a. Use only solid PVC or CPVC Schedule 40 or 80
pipe for exhaust venting. Cellular core PVC or
CPVC is not approved for exhaust vent.
b. All joints in vent pipe, fittings, attachment to the
boiler stub, and all vent termination joints must be
properly cleaned, primed and cemented. Use only
cement and primer approved for use with PVC or
CPVC pipe that conforms to ANSI/ASTM D2564.
c. A PVC or CPVC coupling can be used as an
outside vent termination. In this configuration,
place one of the screens provided between the
coupling and exhaust connection before gluing it.
This is intended to prevent birds or rodents from
entering.
d. A PVC or CPVC tee can be used as an outside air
intake termination. When using this configuration,
place one of the screens provided between the
tee and the air inlet connection before gluing it.
This is intended to prevent birds or rodents from
entering.
F. TEST PORT FOR EXHAUST SAMPLING
1. Figure 3.10 shows an illustration of the plugged
sample port on the outlet of the drain tee for the
PFC-850, PFC-1000 and PFC-1500 boiler.
2. To obtain an exhaust sample during operation,
remove the test port plug and insert the probe from a
suitable combustion analyzer.
3. Be sure to replace the plug before leaving the boiler
unattended.
G. COMMON VENTING MULTIPLE BOILERS
1. Multiple
P
ure
F
ire
®
PFC-850, PFC-1000 and PFC-
1500 boilers may be connected to a common venting
system if they are set up to operate in the cascade
mode described in Section 8.
a. The boilers must communicate in a Master/
Dependent relationship provided in the system
software.
b. The backflow prevention valves supplied on
the gas/air premix inlet prevent products of
combustion from backing up through the burners
into occupied space.
c. A safety control algorithm will operate the
blower to prevent backflow in case of a backflow
prevention valve failure.
2. Figure 3.11 shows two
P
ure
F
ire
®
boilers connected
with a common vent system.
a. The drain tee from the common vent section
should be trapped and neutralized separately from
the boilers.
b. The condensate drain from each boiler should
be run separately to the drain system to prevent
a clogged condensate line from shutting down
multiple boilers.
c. Table 3.5 shows recommended sizing for common
vent piping.
VENTING & AIR INLET PIPING
Figure 3.11: Multiple Boilers with Common Venting
Table 3.5: Common Exhaust Vent Sizing
Number
of Boilers
Boiler Model
PFC-850
PFC-1000
PFC-1500
2
8”
9”
10”
3
10”
12”
12”
4
12”
12”
14”
5
14”
14”
16”
6
14”
16”
18”
7
16”
16”
18”
8
16”
18”
20”
9
18”
18”
22”
10
18”
20”
22”
11
20”
20”
24”
12
20”
22”
24”
13
20”
22”
26”
14
22”
24”
26”
15
22”
24”
28”
16
24”
24”
28”
13
Summary of Contents for PUREFIRE PFC-1000
Page 1: ...PUREFIRE Boilers PFC 850 PFC 1000 PFC 1500 Gas Installation Operation Maintenance Manual ...
Page 82: ...80 Figure 13 4 Control System REPAIR PARTS ...
Page 84: ...82 Figure 13 5 Condensate System REPAIR PARTS ...
Page 90: ...88 APPENDIX C USER MENU APPENDIX C USER MENU Figure C 1 User Menu Managing Burner ...
Page 91: ...89 APPENDIX C USER MENU Figure C 1 User Menu Dependent Burner ...
Page 92: ...90 APPENDIX D INSTALLER MENU STRUCTURE APPENDIX D INSTALLER MENU STRUCTURE ...
Page 93: ...91 APPENDIX D INSTALLER MENU STRUCTURE ...
Page 95: ...93 SERVICE LOG SERVICE LOG Date Serviced By Description of Service Serial Number ...
Page 96: ...94 NOTES ...
Page 97: ...95 NOTES ...
