U.S. Boiler Company INDEPENDENCE, Installation, Operating And Service Instructions

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A.
General.
Install wiring and ground boiler in accordance
with requirements of authority having jurisdiction, or in
absence of such requirements the
National Electrical
Code
, ANSI/NFPA 70 and/or the
Canadian Electrical
Code
Part 1, CSA 22.1,
Electrical Code
.
B.
Wire Vent Damper (if used).
1. Steam or tankless heater.
a. Remove one (1) 7/8" knockout from junction
box. Carefully remove transformer - avoid undue
strain on wires.
b. Install Vent Damper Harness into top of junction
box.
c. Remove factory installed jumper plug (if so
equipped) from Vent Damper Receptacle. Plug
Vent Damper Harness into Vent Damper
Receptacle. See Figure 28.
d. Install cable clamp around flexible Vent Damper
Harness. Attach to jacket top panel. See Figure
29.
2. Note: After vent damper is installed and operated
through one (1) cycle, the control circuit will
operate only when vent damper is in control circuit.
C.
Install thermostat. Locate on inside wall
approximately 4 feet above floor. Do not install on
outside wall, near fireplace, or where influenced by
drafts or restricted air flow, hot or cold pipes, lighting
fixtures, television, or sunlight. Allow free air
movement by avoiding placement of furniture near
thermostat.
Set heat anticipator to match system requirements. See
Table 7. In general, setting heat anticipator too low will
cause boiler to short cycle without bringing heated
space up to temperature. Setting heat anticipator too
high will allow boiler to operate longer than necessary
and overheat space.
D.
Wire thermostat.
Provide Class II circuit between
thermostat and boiler.
1. Steam or tankless heater. Remove transformer from
junction box. Connect one wire from thermostat to
blue wire(s). Connect additional wire from
thermostat to brown wire or red wire for water with
tankless heater.
VIII. Electrical
Figure 29: Vent Damper Harness to Junction Box
DANGER
Positively assure all electrical connections are unpowered before attempting installation or service of
electrical components or connections of the boiler or building. Lock out all electrical boxes with padlock
once power is turned off.
WARNING
Failure to properly wire electrical connections to the boiler may result in serious physical harm.
Electrical power may be from more than one source. Make sure all power is off before attempting any
electrical work.
Each boiler must be protected with a properly fused disconnect.
Never jump out or make inoperative any safety or operating controls.
Figure 28: Vent Damper Connection Detail