Weil-McLain EGH-125, EGH-105 Install optional vent damper if supplied, Vent damper assemblies

CSD-1 control system — Natural gas

Install optional vent damper (if supplied)

If not installing a vent damper, proceed to next section (Piping connections).

Once a vent damper has been operated on an EGH boiler, the boiler will no longer operate without a damper installed.

Only dampers listed in the Replacement parts list in this Supplement are certified for use with EGH Series 4 boilers. Any other damper installed could cause severe personal injury or death.

Minimum clearances — Provide a minimum of 6" between the damper and any combustible material. (Provide a minimum of 46" between EGH jacket top and a combustible ceiling.)

Damper must be installed directly on top of draft hood so that it serves only that boiler. DO NOT modify draft hood or damper, or make another connection between draft hood and damper or boiler. This will void AGA/CGA certification and will not be covered by Weil-McLain warranty. Any changes will cause severe personal injury, death or substantial property damage.

Install damper directly on top of draft hood, with arrow pointing straight up. Install so the damper blade indicator is visible to the user. See Figure 2.

Screws or rivets used to secure the damper to the vent pipe and the draft hood must not interfere with rotation of the damper blade.

Install damper harness between damper actuator and knockout in right top of boiler jacket. Knock out opening in jacket top and install strain relief bushings in jacket

and actuator wiring openings. Insert wires and secure strain relief clamps. See Figure 6, 8, or 10 as applies.

Keep wiring harnesses clear of all hot surfaces.

WARNING

LINE UP KEYWAY WHEN

CONNECTING PLUGS.

FORCING A MISMATCH

CAN CAUSE A

HAZARDOUS CONDITION.

Keyway Key 677-10

Read and apply the harness plug warning label (above) so that it is visible after installation.

Remove dummy plug from damper connector in boiler wiring harness. Plug damper harness receptacle into damper harness plug. See Figure 6, 8, or 10 as applies.

By-passing (jumpering) damper will cause flue products such as carbon monoxide to escape into the house. This will cause severe personal injury or death.

After boiler has operated once, if either end of harness is disconnected, the system will shut down. The boiler will not operate until the harness is reconnected.

	Effikal damper	Johnson Controls damper
Figure 2
Vent damper assemblies		Damper
		blade
		indicator

Hold-open switch (Effikal only) —
Install damper so that switch is
visible and accessible to user.	677-05

Part Number 550-110-677/0299 5