Thomas & Betts UDAS Manuale Utente

VENTER

FAN MOTOR

PRESSURE SWITCH

SPARK GAP

OPERATING SEQUENCE

1.  SET THERMOSTAT AT LOWEST SETTING, FAN SWITCH AT "AUTO" POSITION.

2.  TURN ON MANUAL GAS VALVE.

3.  TURN ON POWER TO UNIT.

4.  SET THERMOSTAT AT DESIRED SETTING.

6.  HIGH STAGE OF THERMOSTAT CALLS FOR HEAT, ENERGIZING THE VENTER MOTOR.

7.  VENTER PRESSURE SWITCH CLOSES, FIRING UNIT AT FULL RATE.

8.  SET FAN SWITCH AT "ON" POSITION FOR CONTINUOUS FAN OPERATION.
9.  IF THE FLAME IS EXTINGUISHED DURING MAIN BURNER OPERATION,

THE INTEGRATED CONTROL SYSTEM CLOSES THE MAIN VALVE AND

MUST BE RESET BY INTERRUPTING POWER TO THE CONTROL CIRCUIT

(SEE LIGHTING INSTRUCTIONS).

GREEN LED

NOTES

1.  THE FOLLOWING CONTROLS ARE FIELD INSTALLED OPTIONS: THERMOSTAT

2.  DOTTED WIRING INSTALLED BY OTHERS.

3.  CAUTION:  IF ANY OF THE ORIGINAL WIRING AS SUPPLIED WITH THE

APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH WIRING MATERIAL

HAVING A TEMPERATURE RATING OF AT LEAST 105° C. EXCEPT FOR SENSOR

LEAD WIRE, FLAME ROLLOUT AND LIMIT WIRING WHICH MUST BE 150° C.

4.  USE 18 GA. WIRE FOR ALL WIRING ON THE UNIT.

5.  LINE AND FAN MOTOR BRANCH WIRE SIZES SHOULD BE OF A SIZE TO PREVENT

VOLTAGE DROPS BEYOND 5% OF SUPPLY LINE VOLTAGE.

FIELD CONTROL WIRING

150'
250'
350'

75'
125'
175'

#18 GA. WIRE
#16 GA. WIRE
#14 GA. WIRE

TOTAL WIRE

LENGTH

DISTANCE FROM
UNIT TO CONTROL

MIN. RECOMMENDED

WIRE GAUGE

LED

Y

Y

WIRE NUT

FIELD WIRING
OPTIONAL FACTORY

FACTORY WIRING

DSI CONTROL

SW1

FAN OFF DELAY

TIME

90

120
160
180

OFF

OFF

ON
ON

ON

OFF
OFF

ON

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
PRESSURE SWITCH DOES NOT CLOSE WITHIN 30 SECONDS

LIMIT SWITCH OR ROLLOUT SWITCH OPEN
PRESSURE SWITCH IS CLOSED BEFORE VENTER IS

ENERGIZED

INTERNAL CONTROL FAULT OR NO POWER

YELLOW LED

FLAME SENSED

STEADY ON
SLOW FLASH WEAK FLAME

UNDESIRED FLAME (VALVE OPEN & NO CALL FOR HEAT)

FAST FLASH

IND BK

NEUTRAL

W

MOTOR

LED

OK

FLAME

G

Y

NEUTRAL

BK

W

LIMIT CONTROL

R

R

R

R

FLAME ROLLOUT

R

BR

FLAME

ELECTRODE

FLAME

GROUND

P1-8

P1-3

P1-6

P1-5

P1-7

P1-9

BK

W

GAS VALVE

BL

BR

P1-2

P1-4

BL

24V

115/208/230

Y

BK

BR

R

L1

NEUTRAL NEUTRAL

L1

COM

SEC

SYSTEM TRANSFORMER

EAC/BLO

W

WIRING

OF VENTER ENERGIZED

VO

LT

BK

AT

O OR A

TC

3.0 AMP

C

R

W

G

Y

Y

PR

P3-4

P3-3

P3-2

TEST

NORMAL OPERATION NO CALL FOR HEAT

STEADY ON

G

G

G

G

G

GRD

SCREW

LINE/1/60

30 VA

CAPACITOR

(SEE NOTE #6)

CAPACITOR

(SEE NOTE #7)

BR/W

BR

BR

BR/W

SPARK

TRANSFORMER

(MODELS 30-125 ONLY)

P3-5

P3-1

WIRING CODE

BLACK - BK

BROWN - BR

RED - R

ORANGE - O

YELLOW - Y

GREEN - G

BLUE - BL

PURPLE - PR

WHITE - W

6.  CAPACITOR IS REMOTE MOUNTED AND INCLUDED ONLY ON 115V MODELS

150-400 AND 208/230V MODELS 100-400.

7.  CAPACITOR IS REMOTE MOUNTED AND INCLUDED ONLY ON MODELS 150 - 400.

Y

8.  SET THERMOSTAT SECOND STAGE ANTICIPATOR AT 0.6 AMPS. AND FIRST

W

5.  LOW STAGE OF THERMOSTAT CALLS FOR HEAT, ENERGIZING THE FAN MOTOR.

9.  JUMPER THERMOSTAT TERMINALS G TO W1 AND RH TO RC IF FAN CONTROL FROM

THERMOSTAT FAN SWITCH IS DESIRED.

STAGE ANTICIPATOR AT MINIMUM.

Q674C SUBBASE (SEE NO

TES #8 AND #9)

(OPT CL18) 

T874F 

THERMOST

AT

RH

W2

W2

W1

R

G

W1

TERMINAL STRIP

G

FUSE

RC

DOOR INTERLOCK

(UDAS ONLY)

R

R

DISCONNECT SWITCH

(UD

AS ONL

Y)

BK

BK

WD# 185306  REV#2

UDAP & UDAS SERIES