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

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Figure 7: Internal Junction Box and Wiring Harness Details
TABLE 3: BAFFLE USAGE
Boiler Model
Baffle Usage
2
nd
Pass 3
rd
Pass
MPO-IQ84 None
[2]
P/N 100081-01
MPO-IQ115
[2]
P/N 102066-01
MPO-IQ147
[2]
P/N 100042-01
None MPO-IQ189
MPO-IQ231
WARNING
Wire an additional safety limit such as a low water
cut-off or temperature limit device, other than an IQ
Control device, in series with the 120V circuit used
to power the boiler. Do Not alter the boiler's factory
wiring when adding additional limit.
4. Installing Boiler-ECOM harness (only used with
Honeywell Oil Primary).
Step a. Locate the black Cat5 harness in the miscella-
neous parts carton.
Step b.
Plug RJ45 plug into receptacle on right side
panel, see Figure 1.
Step c.
Connect other end of harness into ECOM jack
on Oil Primary.
Step d. Secure harness to right side jacket using the
two wire clamps located in miscellaneous parts
carton.
5. Installing stainless steel flueway baffles. Baffle
requirements differ from model to model, see Table 3.
NOTE:
Read caution statement
before
proceeding.
II. PACKAGED BOILER ASSEMBLY - TRIM & CONTROLS (cont'd)
CAUTION
These baffles will generate higher efficiencies and
lower stack temperatures. Under certain conditions,
a lower gross stack temperature entering the chimney
has the potential to be cooled below the dew point
and create condensate on interior surfaces. Flue
gas condensate is corrosive, which requires special
consideration and must be addressed immediately.
DO NOT
install baffles until you have read Section
V, "Venting" completely.