MORTEX G18D SERIES Скачать руководство пользователя

Страница: 32 / 34

MORTEX

PRODUCTS

INC

501

TERMINAL

FORT

WORTH,

76106

Page

When the control has entered this lockout mode, after the limit
switch has reclosed, all outputs remain off for 15 minutes.
Following the 21 minute delay, the control attempts an ignition
trial. After flame is established, the control will operate for 25
seconds, and then de-energize the gas valve and the inducer
after a post purge period. All outputs will then remain off for
another 15 minute period. The sequence is then continually
repeated, with the LED flashing a fault code of “4”, until the
lockout condition is reset.

Pressure Switch

If the pressure switch opens for more than 2 seconds after flame
has been established, the control shall de-energize the gas valve,
run through a normal 15 second post-purge and selected heat
blower off delay. When the blower off delay is complete, the
control shall start an ignition sequence if the thermostat is still
calling for heat.

The control shall ignore pressure switch openings of less than 2
seconds (the gas valve will momentarily de-energize while the
pressure switch is open, this may cause a loss of flame and the
control will respond to the lost flame).

If the pressure switch opens for more than 2 seconds during a
pre-purge or inter-purge, the control shall wait for the pressure
switch to re-close. The purge time re-starts when the pressure
switch closes. If the pressure switch remains open for 60
seconds, the control will lockout, de-energize the inducer, and
begin to flash "2" on the Status LED.

Undesired Flame

If flame is sensed longer than 4 seconds while the gas valve is
de-energized, the control shall keep the induced draft motor
energized, the indoor blower motor on heat speed, the other
outputs will be kept off, and the control will display a LED fault
code of “5”. When flame is no longer sensed, the induced draft
motor will run through post-purge and the indoor heat speed
blower motor will run through the selected blower off delay
time. The control will not be locked out. It will continue with
normal operation following the blower off delay.

Lockout

Soft Lockout:

The control shall not initiate an ignition attempt

or continuous fan operation while in lockout. The control will
still respond to an open limit and undesired flame. Lockout shall
automatically reset after 1 hour. Lockout may be manually reset
by removing power from the control for more than 1 seconds or
removing the thermostat call for heat for more than 2 seconds.

Hard Lockout

: If a gas valve hardware fault, a flame sense

hardware fault, or the limit switch open for more than 5 minutes
has occurred, the control will be in a hard lockout condition. To
reset the lockout, power must be removed from the control for
more than 1 second, or the thermostat call must be removed for
more than 2 seconds.

SECTION VIII: Blower Performance

Table 17: Blower Performance

Configuration SPD

Tap

0.1

0.2

0.3

0.4

0.5

635

463

194