Reznor CAUA Manual de usuario
Revision: CAUA-IGN-CNTRL (03-22) 178435-A
IGNITION CONTROLLER REPLACEMENT KIT INSTALLATION
FOR GAS-FIRED INDOOR HEATER
Supersedes: CP-CAUA-IGN CNTRL (04-15) PN178435R6
MODEL CAUA
Table 1. Ignition Controller Replacement Kit (PN 258251) Components
Item No. Component Description PN (Quantity)
1
DSI control board Heat only (
UTEC #1097-211
)
195573 (1)
2
Wire assembly
9-pin, P1 on wiring diagram 257666 (1)
3 5-pin, P3 on wiring diagram 257675 (1)
4 24-inch, red, with one terminal 129869 (1)
5 Template Drill 257013 (1)
6 Ignition cable 18-inch 257665 (1)
7Terminal Quick connect, 1/4-inch, red 142860 (7)
8 Spade 1350 (1)
9 Wire nut Crimp 22573 (2)
10 Tie Cable 20913 (6)
11 Label NOTICE 203058 (1)
12
Wiring diagram 258250
(1)
⚠ DANGER ⚠
To ensure safe and proper operation, read and follow these installation instructions. Failure to do
so could result in property damage, personal injury, and/or death.
•These instructions are for replacing an obsolete ignition controller (RAM #3MC4-06, serial number code 76 or J/C
#G822KCC-5401D, serial number code 77) with an ignition controller (see Figure 1) replacement kit (PN 258251).
•Refer to the installation manual provided with the heater for important safety information.
•Refer to the replacement parts manual at www.reznorhvac.com for serial number information. All serial number
codes apply to original equipment only.
•Ensure that all components listed in Table 1 are available before beginning installation.
Figure 1. Replacement Ignition Controller
SPARK TRANSFORMER
123
456
789
9-Pin
Harness
Plug P1
1
2
3
4
5
5-Pin Harness
Plug P3
WIRE TERMINALS
2CAUA-IGN-CNTRL (03-22) 178435-A
INSTALLATION
Install the ignition controller replacement kit as follows. Item numbers in parentheses refer to Table 1.
1. Turn OFF gas and electric power.
2. Remove existing ignition controller:
a. Open control compartment and locate ignition controller.
b. Disconnect wiring and existing ignition cable from controller.
c. Remove four screws that secure controller and remove controller.
3. Install replacement ignition controller:
a. Position drill template (5), with painted side facing up, over mounting holes for ignition controller removed in
step 2. Justify holes for replacement controller toward bottom of panel.
b. Mark and drill four 3/16-inch holes.
c. Position DSI control board (1) so that spark transformer is located nearest to spark electrode on burner. Snap
control board into holes.
4. Install replacement ignition cable:
a. Remove existing ignition cable from spark electrode on burner.
b. Connect one end of replacement ignition cable (6) to spark electrode on burner and other end to spark
transformer (see Figure 1) on replacement DSI control board (1).
NOTE: Refer to Table 2 for terminal cross-reference between old and new ignition controllers.
Table 2. Terminal Cross-Reference
Existing Controller Replacement Controller
ACC EAC/BLO
24 VAC HOT SEC
Ground COM
LINE VAC HOT L1
CMB BLWR IND
5. Connect wiring in accordance with replacement wiring diagram label (12, see Figure 2):
a. Connect P3 5-pin wire assembly (3) to thermostat terminal strip as shown in Figure 1.
b. Connect P1 9-pin wire assembly (2) as shown in Figure 1. As necessary, shorten wires and install replacement
terminals (8).
c. Connect existing wires to DSI control board (1) wire terminals. If terminal on line voltage wire is 3/16 inch, cut
off terminal, strip wire, and install quick connect terminal (7). Connect line voltage wire to terminal L1.
d. Connect one end of 24-inch red wire assembly (4) to rollout switch located on burner box top. Connect other
end to high limit switch wire lead using wire nut (9).
e. Install cable ties (10) as necessary for routing and for excess wire length.
NOTE: To cover all applications, connections shown in Figure 2 are for single-stage (AG1) and
two-stage (AG2) controls and for both direct and belt drive motors. Make the connections that ap-
ply to the options on the unit being serviced.
6. Adhere wiring diagram label (12, see Figure 2) on left panel inside burner compartment.
3
CAUA-IGN-CNTRL (03-22) 178435-A
Figure 2. Wiring Diagram Label
7. Adhere NOTICE label (11, see Figure 3) below wiring diagram label installed in step 6.
3
3
TERMINAL
STRIP
THERMOST
AT
C
Y1
Y2
W1
W2
G
FAN RELAY
COIL
Y
7
R
RELAY COIL
7
CONTACTOR COIL
MOTOR
W
BK
BK
BK
FAN
RELAY CONTACTS
2
4
6
BK
R
W
G
Y
P3-4
P3-3
P3-2
R
G
W
C
Y1
Y2
W1
W2
P3-1
Y
P3-5
BR
G
FAN RELAY
COIL
Y
8 7
BR
7
R
C
BR
RELAY COIL
CUSTOMER'S COOL
7
W2
TERMINAL STRIP
THERMOSTAT
L1 L2
BK
W
24V
R
LINE VOLT Y
Y
R
BL
BK
PLUG PILOT OPENING
HONEYWELL TWO STAGE
REDUNDANT GAS VALV E
PILOT
PV
HI
HIGH
STG
LOW
STG
C
MV
R
BR
GAS VALVE
HONEYWELL
MV
MV BL
BR
ACB HEAT
ACB COOL BK
BK L2
CONTACTOR COIL
W
HEAT SPEED
CONTACTOR COIL
COOL SPEED
Y
BK
BK W
VENTER MOTOR
LED
DSI CONTROL
SW1
FAN OFF DELAY
TIME
90
120
160
180
OFF
OFF
ON
ON
ON
OFF
OFF
ON
12
S W 1
IND BK OR BL
NEUTRAL BK OR BR
(SEE NOTES)
LED
OKFLAME
GY
NEUTRAL
LIMIT
CONTROL
RR
R
P1-8
P1-3
BK OR BL
P1-2
P1-4
BL
BK
L1NEUTRAL
L1
SEC
ATO OR AT C
3.0 AMP
TEST
FUSE
FLAME
ROLLOUT SWITCH
ACB HEAT
ACB COOL
W
L1
L2
WL2
COM
1
O
BR
FLAME
ELECTRODE
FLAME
GROUND
P1-7
P1-9
PRESSURE SWITCH
Y
Y
P1-6
P1-5 W
3
SPARK GAP
SPARK
TRANSFORMER
BL
BK
BR
TRANSFORMER
40 VA
BR
BL
BK
R
BL
DOOR
SWITCH
BKBKBK
DSI BOARD
REPLACEMENT
Option AG2
Option AG1
BELT DRIVE
DIRECT DRIVE
NEUTRAL
L1
W W L2
BK
CAUA
WD #275047
RR
GREEN LED
FAST FLASH
1 FLASH
2 FLASH
3 FLASH
4 FLASH
STEADY OFF
LED FLASH CODES
NORMAL OPERATION CALL FOR HEAT
IN LOCKOUT FROM FAILED IGNITIONS OR FLAME
LOSSES
P1-8 TO P1-3 JUMPER OPEN CIRCUIT
PRESSURE SWITCH IS CLOSED BEFORE VENTER IS
ENERGIZED
INTERNAL CONTROL FAULT OR NO POWER
YELLOW LED
FLAME SENSEDSTEADY ON
SLOW FLASHWEAK FLAME
UNDESIRED FLAME (VALVE OPEN & NO CALL FOR
HEAT)
FAST FLASH
PRESSURE SWITCH DOES NOT CLOSE WITHIN
30 SECONDS OF VENTER ENERGIZED
NORMAL OPERATION NO CALL FOR HEATSTEADY ON
Figure 3. NOTICE Label
8. Turn ON electric power and gas, start up heater, and check for proper operation.
NOTE: Refer to the installation manual at www.reznorhvac.com for operating sequence and
troubleshooting information.
NOTICE
BEFORE REPLACING CIRCUIT BOARD:
• Check Fuse on Circuit Board
• Check 24VAC Supply
• Check LED Flash Codes
Replacing circuit board will not correct
prob lems that are external to the board.
203058 Rev. 1
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