S
ERIES
2000 I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
46
16.6.4 Flame Control
This de
v
ice
w
ill check for both pilot flame and main
flame
w
ithin the b
u
rner. When a flame signal from the
pilot flame is a
v
ailable, it
w
ill allo
w
the main gas
v
al
v
e
to open.
All models
u
se a flame rod to detect the flame
(bet
w
een 6 to 8 Vdc).
If a pilot flame is not present, the electrical signal
cannot be sent and the pilot b
u
rner gas
v
al
v
e
w
ill
close. The relay is eq
u
ipped
w
ith a 10-second trial for
ignition. If ignition does not occ
u
r, the flame
safeg
u
ard relay
w
ill locko
u
t, it
w
ill reset
u
pon po
w
er
restoration. (See the Tro
u
ble-Shooting G
u
ide -
Page
82, Section 23
)
16.6.5 Dischar
g
e Temperature Sensor
This de
v
ice senses the discharge temperat
u
re of the
air at the blo
w
er. The discharge temperat
u
re sensor
reports the discharge temperat
u
re to the temperat
u
re
control amplifier
w
hich mod
u
lates the b
u
rner to the
temperat
u
re set on the remote panel selector. Sho
u
ld
this system fail, the man
u
al high temperat
u
re limit
s
w
itch
w
ill t
u
rn the b
u
rner off. BMS-ready air
handlers do not come eq
u
ipped
w
ith this sensor and
m
u
st be field-s
u
pplied.
16.6.6 Positive Low Fire Start
This feat
u
re forces the b
u
rner to start in lo
w
fire
rather than high fire d
u
ring the air handler’s start-
u
p
seq
u
ence of operations. The b
u
rner maintains its lo
w
fire setting for 10 seconds (as per timer setpoint)
before it begins to mod
u
late.
FIGURE 23: Interconect Wirin
g
1
