1
8
sions, r
a
dios or
a
ir stre
a
ms from registers. Refer to instructions p
a
cked with the thermo-
st
a
t for “he
a
ter” selection or
a
djustment.
The following is
a
list of recommended thermost
a
ts to be used with or without
a
n econo-
mizer:
X. FURNACE SECTION CONTROLS AND
IGNITION SYSTEM
NORMAL FURNACE OPERATING SEQUENCE
This unit is equipped with
a
n integr
a
ted direct sp
a
rk ignition control.
1. The thermost
a
t c
a
lls for he
a
t.
2. The control bo
a
rd will run
a
self check to verify th
a
t the limit control
a
nd m
a
nu
a
l reset
overtemper
a
ture control
a
re closed
a
nd th
a
t the pressure switch is open.
3
. Upon closure of the pressure switch, the control bo
a
rd energizes the induced dr
a
ft
blower for
a
15 second prepurge.
4. After the 15 second prepurge, the g
a
s v
a
lve opens
a
nd the sp
a
rk is initi
a
ted for 7 sec-
ond tri
a
l for ignition.
5. Burners ignite
a
nd fl
a
me sensor proves
a
ll burners h
a
ve lit.
6. The circul
a
ting
a
ir blower is energized
a
fter
3
0 seconds.
7. The control bo
a
rd enters
a
norm
a
l oper
a
tion loop in which
a
ll s
a
fety controls
a
re moni-
tored continuously.
8
. Thermost
a
t is s
a
tisfied
a
nd opens.
9. The g
a
s v
a
lve is de-energized
a
nd closes, shutting down the burner fl
a
me.
10. The control bo
a
rd will de-energize the inducer
a
fter
a
five second post purge.
11. The circul
a
ting
a
ir blower is de-energized
a
fter 90 seconds.
The integr
a
ted control is
a
three ignition system.
After
a
tot
a
l of three cycles without sensing m
a
in burner fl
a
me, the system goes into
a
100% lockout mode. After one hour, the ignition control repe
a
ts the prepurge
a
nd ignition
cycles for
3
tries
a
nd then go into 100% lockout mode
a
g
a
in. It continues this sequence of
cycles
a
nd lockout e
a
ch hour until ignition is successful or power is interrupted. During the
lockout mode, neither the ignitor or g
a
s v
a
lve will be energized until the system is reset by
turning the thermost
a
t to the “OFF” position or interrupting the electric
a
l power to the unit
for
3
seconds or longer. The induced dr
a
ft blower
a
nd m
a
in burner will shut off when the
thermost
a
t is s
a
tisfied.
The circul
a
ting
a
ir blower will st
a
rt
a
nd run on the he
a
ting speed if the thermost
a
t f
a
n
switch is in the “ON” position.
The integr
a
ted furn
a
ce control is equipped with di
a
gnostic LED. The LED is lit continuously
when there is power to the control, with or without
a
c
a
ll for he
a
t. If the LED is not lit, there
Single Stage Cool
Two Stage Cool
W/O Economizer
W/Economizer
M
a
ple Ch
a
se -
Honeywell -
Model #0970
Model #T7
3
00-A1005
Honeywell -
Honeywell -
Model #T
8
602C
Model #T
8
74D-1959
M
a
ple Ch
a
se -
Model #0960
White Rodgers -
Model #1F91-59
Robertsh
a
w -
Model #CM64A-U
S
AJ
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3
.0
16
14
12
10
10
10
2.5
16
14
12
12
12
10
2.0
1
8
16
14
12
12
10
50
100
150
200
250
3
00
Length of Run – Feet (1)
Thermostat Load -
Amps
TABLE 6
(1) The tot
a
l wire length is the dist
a
nce from the furn
a
ce to the thermo-
st
a
t
a
nd b
a
ck to the furn
a
ce.
NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18
AWG.
Summary of Contents for TGC Series
Page 24: ...24 FIGURE 20 FIGURE 21 INTEGRATED FURNACE CONTROL SPEED TAP BLOCK FIGURE 22...
Page 25: ...25 FIGURE 22 Continued...
Page 37: ...37 FIGURE 23 WIRING DIAGRAM...
Page 38: ...38 FIGURE 24 WIRING DIAGRAM...
Page 39: ...39 FIGURE 25 WIRING DIAGRAM...
Page 40: ...40 FIGURE 26 WIRING DIAGRAM...
Page 41: ...41 FIGURE 27 WIRING DIAGRAM...
Page 42: ...42 FIGURE 28 WIRING DIAGRAM...
Page 43: ...43 FIGURE 29 SYSTEM CHARGE CHARTS 3 TON COOLING 13 SEER...
Page 44: ...44 FIGURE 30 SYSTEM CHARGE CHARTS 3 5 TON COOLING 13 SEER...
Page 45: ...45 FIGURE 31 SYSTEM CHARGE CHARTS 4 TON COOLING 13 SEER...
Page 46: ...46 FIGURE 32 SYSTEM CHARGE CHARTS 5 TON COOLING 13 SEER...
Page 50: ...50...
Page 51: ...51...
Page 52: ...52 CM 1206...
