16
•
1-1/2" NPT horizontal left or right side return
piping - Install relief valve vertically in 3/4" NPT
tapping on tee. See Figure 5.
Step c.
Pipe discharge of relief valve as shown in Figures
13A and 13B. Installation of the relief valve must
be consistent with ANSI/ASME Boiler and Pressure
Vessel Code, Section IV.
WARNING
Safety valve discharge piping must be piped near
floor to eliminate potential of severe burns. Do not
pipe in any area where freezing could occur. Do not
install any shut-off valves, plugs or caps.
2. Install drain valve, see Figure 6.
Step a.
Apply pipe sealant to both ends of 1-1/4" NPT
x 5" lg. nipple. Thread nipple into 1-1/4" NPT lower
rear tapping on rear section.
Step b.
Thread 1-1/4" x 1-1/4" x 3/4" NPT tee on opposite
end of 5" lg. nipple installed in Step a.
NOTE:
Based on access for servicing and location
of sewer or floor drain, when tightening these fittings,
determine if drain valve is to be located on the left or
right side.
Tighten nipple and tee into 1-1/4" NPT lower rear
tapping on rear section until joints are water tight for
desired position.
Step c.
Apply sealant to 3/4" NPT thread on drain valve.
Thread into 3/4" NPT tapping on side outlet of tee. Use
hex nut portion to tighten valve until water tight.
3. Connecting field wiring, refer to Figures 7, 28A thru
28C.
Step a.
Locate the black, white and green harness wires
labeled "120V Power Supply" inside internal junction
box, see Figure 7. Using wire nuts, connect the 120
volt power supply field wires to the harness wires.
Step b.
Locate the yellow and white wires labeled "System
Circulator" inside internal junction box, see Figure 7.
Using wire nuts, connect the 120 volt field wires to
the harness wires.
Step c.
If applicable, locate the violet and white wires
labeled "DHW Circulator" inside internal junction
box, see Figure 7. Using wire nuts, connect the 120
volt field wires to the harness wires.
Step d.
If applicable, locate the brown wire labeled "DHW
Demand" inside internal junction box, see Figure 7.
Using wire nut, connect the 120 volt field wire to the
harness wire.
Step e.
24V thermostat field wiring will enter through
5/16" snap bushing located on either the right side or
left side jacket panel. Connect the 24V wiring from
the thermostat to the "T-T" terminals on the Option
Control Panel.
Step f.
To connect other external devices, refer to the
instructions included with these devices.
II. PACKAGED BOILER ASSEMBLY - TRIM & CONTROLS (cont'd)
Figure 6: Piping Arrangement for Drain Valve and Indirect Water Heating Return
Содержание MPO - IQ
Страница 6: ...6 Figure 1 MPO IQ84 Thru MPO IQ231 Water Boiler ...
Страница 22: ...22 Figure 11 Boiler Removal from Skid III UNIT PAK BOILER ASSEMBLY TRIM CONTROLS continued ...
Страница 27: ...27 Figure 13A Recommended Water Piping for Circulator Zoned Heating Systems IV WATER Boiler PIPING continued ...
Страница 28: ...28 Figure 13B Recommended Water Piping for Zone Valve Zoned Heating Systems IV WATER Boiler PIPING continued ...
Страница 42: ...42 Figure 28A Schematic Wiring Diagram VII ELECTRICAL continued ...
Страница 43: ...43 Figure 28B Schematic Wiring Diagram Burner Options VII ELECTRICAL continued ...
Страница 44: ...44 Figure 28C Ladder Diagram VII ELECTRICAL continued ...
Страница 70: ...70 Bare Boiler Assembly XIV Repair Parts continued ...
Страница 72: ...72 Jacket Assembly XIV Repair Parts continued ...
Страница 74: ...74 MPO IQ84 Thru MPO IQ231 Water Boilers Trim and Controls XIV Repair Parts continued ...
Страница 78: ...78 Beckett AFG Burner XIV Repair Parts continued ...
Страница 80: ...80 Beckett NX Burner XIV Repair Parts continued ...
Страница 92: ...92 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net ...