LD/LJ Side Wall Vent Kit Instructions
Page 11
4. Operational Checkout For The LD
and LJ Heater
The heater and side-wall venter installation must
be checked for correct control sequence and vent opera-
tion. This must be done in conjunction with procedures
prescribed in the LD or LJ heater installation instruc-
tions and the Tjernlund instructions for side wall vent
systems. The complete pool system must be in place and
operable.
4.1 Sequence of Operation for the LD and
LJ Heaters
When the electronic control of the heater senses
that water flowing through the heat exchanger is too
cool, a heating sequence is initiated as follows:
1. The heater control system turns on the side-wall
venting system blower.
2. The venter pressure switch senses venter operation
and enables the heater to begin its ignition se-
quence.
3. When the igniter is hot enough, the gas valve
opens and burner ignition takes place.
4. When the call for heat ends, the burners are shut
off.
5. Approximately 30 seconds after the heater burners
are shut off, the side-wall venter stops.
If normal ignition is not accomplished during a
call for heat, the heater ignition control imposes two (2)
additional attempts. At appropriate times during those
attempts, the heater will attempt to ignite the burners.
The side-wall venter will operate continuously during
recycle ignition attempts.
4.2 Draft Check and Venter Flow
Adjustment
Operational checks for draft and venter flow are
necessary to assure that the vent operates properly. A
properly installed and adjusted system will operate at
negative pressure, drawing air into the draft hood. Re-
fer to the Tjernlund installation instructions and conduct
the tests and adjustments prescribed therein.
