STEP 4: VENTING BOILER
A
FIGURE 2.4: VENT DAMPER INSTALLATION FOR INTERMITTENT PILOT
DANGER: Draft diverter, vent outlet and vent damper as supplied must not be altered in any way, as proper boiler operation would be jeopardized. Flame rollout, fire or carbon monoxide poisoning will result.
The flue or vent connectors must be installed flush with the inside chimney liner surface and sealed in place with furnace cement. Horizontal positions of the single wall and type B venting systems shall be supported by use of strap hangers or their equivalent. Vent supports should be placed a maximum of 15 feet apart and as required to prevent sagging. The vent connectors shall be pitched 1/4" per foot upwards towards the chimney or vent termination.
Installing Vent Damper
DANGER: Only the boiler may be served by the vent damper. Do not attempt to use it to vent an additional appliance. This will cause fire or carbon monoxide poisoning.
The vent damper must be mounted directly on top of the draft diverter. The vent outlet extension must be installed between the damper and the outlet to allow the damper plate to open and close.
VENT DAMPER
SPILL
SWITCH
CABLE
BRACKET
.DK BLUE
PRESSURE
CONTROL
THERMOSTAT CONNECTION
TRANSFORMER
PILOT
CONTROL
THERMOSTAT CONNECTION
Locate the motor on the front side and position the cable so that it does not touch the metal surface of the draft diverter (see Figure 2.4). If necessary, turn angle connector on vent damper upward until cable clears; tighten locknut to secure. The direction of the flow arrow imprinted on the vent damper must point upward. The damper position indicator, which is located on the side of the vent damper opposite the motor,
FIGURE 2.4A: VENT DAMPER INSTALLATION FOR STANDING PILOT
VENT DAMPER
must be visible.
CAUTION: A minimum of 6" between vent damper and combustible materials must be maintained. The vent
SPILL SWITCH
PRESSURE CONTROL
damper must be accessible for servicing and checking position indicator.
If applicable, remove hairpin shipping clip which holds damper blade in closed position and observe that damper blade rotates slowly to open position. Do not force it closed as it may damage the gear train and void the warranty. The blade should move freely and without obstruction.
Secure the vent damper housing to the draft diverter outlet with sheet metal screws or pop rivets. Refer to Figure 2.5 for fastener locations. Install flue pipe over top of vent damper and secure to damper housing with sheet metal screws or pop rivets.
Attach vent damper cable to cable clamp on boiler left panel and join the Molex connector (see Figures 2.4 & 2.4A).
THERMOSTAT
CONNECTION
CABLE | TRANSFORMER |
BRACKET |
GAS
VALVE
.DK BLUE
THERMOSTAT
CONNECTION
6