25
XI Wiring
WARNING
• All wiring and grounding must be done in accordance with the authority having jurisdiction
or, in the absence of such requirements, with the
National Electrical Code (ANSI/NFPA
70).
• Disconnect electrical power to the boiler and heating system before servicing. Positively
assure that no voltage is present. Lock electrical boxes to prevent someone from
inadvertently restoring power before the heating system is safe to operate.
• Never defeat or jump out safety devices.
• Protect each boiler circuit with a properly sized over-current protection device.
• Make electrical connections carefully according to the boiler’s wiring diagram and
instructions.
• Wire additional field supplied safety limits, such as low water cutoffs and temperature limit
devices, in series with the 120V circuit used to power the boiler. Do not alter the boiler’s
factory wiring when adding an additional limit device.
1) 120 Volt Wiring - The boiler should be provided with its own 15A branch circuit with fused disconnect. 120VAC power con
-
nections are made inside the junction box on the right side of the boiler as follows (also see Figures. 11.0 and 11.1):
•
Connect Hot (“black”) to black pigtail in junction box.
•
Connect Neutral (“white”) to white pigtail in junction box.
•
Connect Ground (“green” or bare) to green pigtail in junction box.
2) Install R8285D Control – The R8285D (“transformer/relay”) control is shipped loose inside the accessory carton. Connect
the plug on the back of this control into the receptical inside the junction box and mount the R8285D on the junction box as
shown in Figure 2.3.
3) 24 Volt Thermostat Wiring - Connect to a 24 volt heating thermostat to Terminals R and G on the R8285 (Figure 11.1).
Follow thermostat manufacturer’s instructions. To insure proper thermostat operation, avoid installation in areas of poor air
circulation, hot spots (near any heat source or in direct sunlight), cold spots (outside walls, walls adjacent to unheated areas,
locations subject to drafts). Provide Class II circuit between thermostat (or zone controls) and boiler.
3) Optional Tankless Heater Wiring - Route the wire harness from this control to the “R” and “G” (thermostat) terminals on the
R8285D control so that they are in parallel with the space heating thermostat (Figure 11.1).
Summary of Contents for FSZ080
Page 2: ......
Page 14: ...12 FIGURE 6 4 ALLAIR FROM OUTDOORS USING HORIZONTAL DUCTS INTO BOILER ROOM...
Page 18: ...16 FIGURE 8 1 STEAM BOILER PIPING FOR GRAVITY RETURN...
Page 26: ...24 FIGURE 10 2 TWO PIPE GRAVITY FEED SYSTEM NOT RECOMMENDED FIGURE 10 3 TWO PIPE LIFT SYSTEM...
Page 29: ...27 FIGURE 11 0 WIRING CONNECTIONS DIAGRAM STEAM CG450 PROBE LWCO...
Page 30: ...28 FIGURE 11 1 CONNECTIONS WIRING DIAGRAM FOR BURNER SPECIFIC PRIMARY CONTROL...
Page 31: ...29 FIGURE 11 2 INDIRECT WATER HEATER FIELD WIRING...
Page 41: ...39 Notes...
Page 43: ...41...
Page 45: ...43...
Page 47: ...45...
Page 51: ...Notes...
