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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 CSA C22.1 Electrical
Code.
B. Wire Vent Damper (if used).
1. Steam or Water with gravity circulation 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 31.
2. Water with intermittent circulation and without
tankless heater.
a. Remove 7/8" knockout and cover from limit
control.
b. Install Vent Damper Harness into top of limit.
c. Remove factory installed jumper plug from Vent
Damper Receptacle. Plug Vent Damper Harness
into Vent Damper Receptacle. See Figure 31.
d. Install cable clamp around exible Vent Damper
Harness. Attach to jacket top panel. See Figure
33.
3. 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 oor. Do not install on
outside wall, near replace, or where inuenced by
drafts or restricted air ow, hot or cold pipes, lighting
xtures, television, or sunlight. Allow free air
movement by avoiding placement of furniture near
thermostat.
VIII. Electrical
Figure 31: Vent Damper Connection Detail
d. Install cable clamp around exible Vent Damper
Harness. Attach to jacket top panel. See Figure
32.
Figure 32: 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.