55
c. Connect opposite end of L4006B Low Fire Hold
Control harness to right side junction box cover
‘A’, hole location #2 as shown in Figure 40.
d. Locate mating connector labeled “Low Fire
Hold” inside right junction box. Join mating
connectors which are polarized and lock
together. Lightly tug on connectors to make sure
they are secure.
e. Proceed to next appropriate control option
listed below for installation details. If no other
controls are being installed at this time, secure
Cover ‘A’ and Cover ‘B’ to jacket rear top panel
with two (2) #8 x 1/2” lg. hex head SMS per
cover. Install 7/8” knockout plugs (provided) to
all unused holes, refer to Figure 40.
4. Install Low/High/Low Control or Modulating
Control
a. Install
Low/high/Low
Control as follows (for
modulating control, proceed to Step b):
i.
Apply thread sealant to 3/4” immersion
well and install in Tapping ‘H’ as shown in
Figure 38. Wrench well until water tight.
ii.
Locate L4006A Low/High/Low Control
and remove knockout on casing closest to
mounting hole. Connect end of harness
with forked terminals to casing knockout.
Connect black and gray wires to terminals
on Low/High/Low Control, wires are
interchangeable. Refer to Figure 44.
iii.
Connect opposite end of L4006A Low/High/
Low Control harness to junction box cover
‘A’, hole location #4 as shown in Figure 40.
iv.
Locate mating connector labeled “LO-HI-
LO/MOD” inside right junction box. Join
mating connectors which are polarized and
lock together. Lightly tug on connectors to
make sure they are secure.
v.
Proceed to next appropriate control option
listed below for installation details. If no
other controls are being installed at this
time, secure Cover ‘A’ and Cover ‘B’ to
jacket rear top panel with two (2) #8 x 1/2”
Figure : Install Low/High/Low Control
Figure 5: Install Modulation Control
Figure : Install Low Fire Hold Control
lg. hex head SMS per cover. Install 7/8”
knockout plugs (provided) to all unused
holes, refer to Figure 40.
b. Install
Modulating
Control as follows:
i.
Apply thread sealant to 3/4” immersion
well and install in Tapping ‘H’ as shown in
Figure 38. Wrench well until water tight.
ii.
Locate T991A Modulation control and
remove knockout on casing closest to
temperature control knob. Connect end
of harness with forked terminals to casing
knockout.
Connect wires to terminals as follows:
B Terminal - Black Wire w/White Tracer
W Terminal - Gray Wire
R Terminal - Red Wire w/White Tracer
iii.
Install Remote Sensing Bulb into control
well and secure with retaining clip. Coil
excess sensor tubing as shown in Figure 45.
iv.
Mount T991A Control to rear panel on
left side of return manifold with two (2)
self drilling #8 x 1/2” lg. hex head SMS
(provided) as shown in Figure 45.
Summary of Contents for MPC
Page 19: ...19 Figure 5 Manual or Hydraulic Draw up Section Assembly ...
Page 28: ...28 Table VII Modular Return Water Mixing Tube RWMT RC ...
Page 29: ...29 Figure 13 Return Water Mixing Tube RC Assembly and Installation ...
Page 78: ...78 Figure 56 MPC Common Bare Boiler Components ...
Page 80: ...80 Figure 56 MPC Common Bare Boiler Components continued ...
Page 82: ...82 Figure 57 MPC Front Center Section Frame Rail Assembly ...
Page 84: ...84 Figure 58 MPC Rear Section Frame Rail Assembly ...
Page 86: ...86 Figure 59 MPC Return Water Mixing Tube RC Assembly ...
Page 88: ...88 Figure 60 MPC Heat Exchanger Insulation Wrapper ...
Page 90: ...90 Figure 61 MPC Internal Wiring Harness Components ...
Page 92: ...92 Figure 62 MPC Jacket Panel Assembly ...
Page 94: ...94 Figure 62 MPC Jacket Panel Assembly continued ...
Page 96: ...96 Figure 63 MPC 2 nd and 3 rd Pass Flueway Baffles ...