U.S. Boiler Company MPO - IQ, Service Instructions Manual

Page: 37 / 92

37
Boiler Model No.
Boiler Flue Outlet
Collar OD (Inch)
Vent Hood
Inner Pipe
Diameter (Inch)
Flex Oil Vent Pipe
Inner Pipe Diameter
(Inch)
* Flue Outlet Collar to
Vent Pipe Adapter (Inch)
MPO-IQ147
6 5 6 to 5
MPO-IQ189
MPO-IQ231
7 6 7 to 6
NOTE: *
The model specific Direct Vent (FDVS) Kit Cartons contain adapters (reducers) (see Table 6) to connect boiler flue outlet
collar to vent pipe.
TABLE 6: FLEx VENT / VENT TERMINATION PIPE DIAMETERS
E. CONNECTING APPLIANCE ADAPTER TO
BOILER FLUE OUTLET COLLAR
(See Figure 23)
1. Apply a bead of supplied high temperature
sealant to boiler flue outlet collar approximately
1" from collar end.
2. Remove any oil and grease from inside of
supplied Appliance (Boiler Flue Outlet)
Adapter, and, apply a bead of high temperature
sealant to inside of the adapter, ½" from end.
3. With twisting motion, assemble the appliance
adapter onto boiler flue outlet collar.
4. Using a mallet and a block of wood, carefully
tap the adapter onto the outlet collar. Insure
no damage is done to the adapter and the flue
outlet collar.
5. Assemble supplied adapter clamp halves with
5/16-18 bolts and square nuts; install the adapter
clamp onto the appliance adapter and tighten
securely.
6. If required, install anchoring screws (installer
provided) thru four holes in the clamp into the
flue outlet collar.
Figure 23: Appliance Adapter Installation
7. Apply sealant around the adapter end mated to the flue
outlet collar.
8. Install supplied 3/8” sampling port plug screw hand tight
into the adapter sampling port.
9.
After initial boiler start-up and burner testing/
adjustment are completed,
apply high temperature
sealant under the head of sampling port plug screw, and,
install the screw in the sampling port tightening securely.
Figure 24: Vent Pipe Assembly to Vent Termination
Inner Pipe and Appliance Adapter
VI. DIRECT VENTING / AIR INTAKE PIPING (continued)