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SV9520H SMARTVALVE™ SYSTEM CONTROL LINE VOLTAGE POLARITY SENSE MODELS

69-1383

8

Table 7. Pressure Regulator Specification Pressures (in. wc)

Table 8. Pressure Regulator Specification Pressures (kPa).

Fig. 7. SV9520 typical wiring connections in fan assisted warm air furnace with ST9160 Fan Board.

SERVICE

WARNING

Fire or Explosion Hazard.
Can cause property damage, severe injury 
or death.
Do not disassemble the ignition system control; it 
contains no replaceable components. Attempted 
disassembly or repair can damage the ignition 
system control.

CAUTION

Equipment Damage Hazard.
Improper wiring can damage equipment.

1. Do not apply a jumper across or short the 

thermostat, 24V hot or 24V common terminal 
in the SV9520 wiring harness. Doing so can 
burn out the heat anticipator in the thermostat 
or damage the system transformer.

2. After servicing, verify proper system operation.

IMPORTANT

Allow 60 seconds after shutdown before re-
energizing step-opening model to assure lightoff 
at step pressure.

Model 

Type

Type of 

Gas

Nominal Inlet 

Pressure Range

Factory Set Nominal Outlet Pressure

Setting Range

Step

Full Rate

Step

Full Rate

Slow

NAT

5.0 to 7.0

—

3.5

—

3.0 to 5.0

LP

12.0 to 14.0

—

10.0

—

8.0 to 12.0

Model 

Type

Type of 

Gas

Nominal Inlet 

Pressure Range

Factory Set Nominal Outlet Pressure

Setting Range

Step

Full Rate

Step

Full Rate

Slow

NAT

1.2 to 1.7

—

0.9

—

0.7 to 1.2

LP

2.9 to 3.9

—

2.5

—

2.0 to 3.0

C1

C2

 C3

CONT

EAC

HEAT

HUM

M2

MOTOR

PARKING

TERMINALS

M1

L1

NEUTRALS

24 VAC

R

W

C

COM

XFMR

COOL

LOAD

COMMON

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION 
AS REQUIRED.

CONNECT THE 120V (HOT) LEAD TO L1 ON ST9160.

APPLIANCE CHASSIS MUST HAVE RELIABLE CONNECTION TO EARTH GROUND.

1

2

3

M17606

SV9520

AIR PROVING
SWITCH

NEUTRAL

HOT

ROLL-OUT

SWITCH

LIMIT

SWITCH

AUXILIARY
LIMIT SWITCH
(OPTIONAL)

COMBUSTION
AIR BLOWER 

AIR

DATA

NEUTRAL

2

1

3

ELECTRONIC
AIR CLEANER

CIRCULATING
FAN

HUMIDIFIER

L2

L1
(HOT) 

TO 120 VAC, 60 HZ 
POWER SUPPLY

THERMOSTAT

R

R

C

W

Y

Y

G

G

ST9160

ELECTRONIC 

FAN TIMER

HOT 
SURFACE 
IGNITER

FLAME ROD

L1

1

1

5
6

7
8

3

2

2

2

1

3

5

4

6

2

3

3

1

4

4

4

40 VA 
TRANSFORMER

P1

Содержание SmartValve SV9520H

Страница 1: ... control is removed when the thermostat call for heat ends This system is suitable for a wide range of fan assisted combustion gas fired appliances including furnaces rooftop furnaces boilers unit heaters infrared heaters water heaters and commercial cooking appliances The specific application of the SmartValve System is the responsibility of the appliance manufacturer See Table 2 for temperature ...

Страница 2: ...pressure drop Table 4 Gas Capacity Conversion Factor Table 5 Adapter Flange Part Numbers a Flange kits include one flange one O ring and four mounting screws PLANNING THE INSTALLATION WARNING Fire or Explosion Hazard Can cause property damage severe injury or death Follow these warnings exactly 1 Plan the installation as outlined below 2 Plan for frequent maintenance as described in the Maintenanc...

Страница 3: ...l Shock Hazard Can cause serious injury or death Disconnect power supply before installation More than one disconnect may be necessary Connect the appliance chassis to earth ground Make sure the 120 Vac neutral line and earth ground are electrically common at the breaker box INSTALLATION When Installing this Product 1 Read these instructions carefully Failure to follow them could damage the produc...

Страница 4: ...he control after completing the installation includes leak testing the adapters and screws If you use a wrench on the valve after the flanges are installed use the wrench only on the flange not on the control See Fig 5 Location The SV9520H is mounted in the appliance vestibule on the gas manifold CAUTION Equipment Damage Hazard Water can damage equipment and wiring Do not locate where water can dr...

Страница 5: ...ol inlet and outlet if necessary 6 Connect the pipe to the ignition system control inlet and outlet Use a wrench on the square ends of the ignition system control If a flange is used place the wrench on the flange rather than on the ignition system control Refer to Fig 4 and 5 Fig 4 Top view of ignition system control Fig 5 Proper use of wrench on ignition system control with and without flanges P...

Страница 6: ...commonality STARTUP AND CHECKOUT Ignition System Control Switch Settings Ignition system control switch settings are as follows OFF prevents main gas flow through the ignition system control ON permits gas to flow through the control body At the appropriate time in the appliance operation main gas can flow to the main burner NOTE Controls are shipped with the ignition system control switch in the ...

Страница 7: ...river turn the inner adjustment screw clockwise to increase or counterclockwise to decrease the gas pressure to the burner c Always replace the cap screw and tighten firmly to prevent gas leakage 4 If the desired outlet pressure or flow rate cannot be achieved by adjusting the ignition system control check the ignition system control inlet pressure using a manometer at the ignition system control ...

Страница 8: ...ening model to assure lightoff at step pressure Model Type Type of Gas Nominal Inlet Pressure Range Factory Set Nominal Outlet Pressure Setting Range Step Full Rate Step Full Rate Slow NAT 5 0 to 7 0 3 5 3 0 to 5 0 LP 12 0 to 14 0 10 0 8 0 to 12 0 Model Type Type of Gas Nominal Inlet Pressure Range Factory Set Nominal Outlet Pressure Setting Range Step Full Rate Step Full Rate Slow NAT 1 2 to 1 7 ...

Страница 9: ...ls 3 Observe LED indicator on SV9520 check and repair the system as noted in Table 9 4 After LED flash code analysis and appliance repair are complete turn thermostat below room temperature for 10 seconds turn the thermostat above room temperature to initiate a new call for heat 5 Observe the ignition sequence comparing it to the Sequence of Operation shown in Fig 11 Allow the new ignition sequenc...

Страница 10: ...tion comparing it to the Sequence of Operation shown in Fig 11 Allow the ignition sequence to proceed until the appliance lights or an abnormal or unexpected event is observed Be sure to wait long enough for one of the LED diagnostic codes to flash 7 Observe the LED indicator on the SmartValve check and repair the system as noted in Table 10 8 After analysis and repair are complete turn off applia...

Страница 11: ...reset the safety control 2 Disconnect all electric power to the appliance 3 Remove the ignition system control access panel 4 Move the ignition system control switch to the OFF position 5 Wait five minutes to clear out any unburned gas If you then smell gas STOP Follow Step 1 in the Warning above If you do not smell gas continue with the next step 6 Move the ignition system control switch to the O...

Страница 12: ...R PROVING SWITCH PROVED CLOSED WITHIN 30 SECONDS COMBUSTION AIR BLOWER OFF MAIN VALVE CLOSES COMBUSTION AIR BLOWER OFF AFTER POST PURGE 1 HOUR AUTO LOCKOUT RESET DELAY MAIN VALVE CLOSES COMBUSTION AIR BLOWER OFF AFTER POST PURGE CIRCULATING AIR FAN OFF AFTER DELAY WAIT FOR NEXT CALL FOR HEAT FAILED TRIALS FOR IGNITION LESS THAN FOUR DURING THIS IGNITION SEQUENCE NO NO YES YES YES NO NO MAIN VALVE ...

Страница 13: ...hes Limit string open Combustion air blower is energized If control system includes ST9160 Electronic Fan Timer the heat speed circulating air fan will be energized System waits for limit string to close then initiates a new ignition sequence 1 Open high temperature or auxiliary limit switch 2 Open manual reset or auto reset burner rollout switch in the limit circuit 3 Limit and rollout switch cir...

Страница 14: ... inducer wiring 2 Low line voltage power supply 3 Airflow proving switch operation tubing wiring 4 Obstructions or restrictions in appliance air intake or exhaust flue system that prevent proper combustion airflow 5 Other devices such as auxiliary limits in the airflow proving circuits 6 4 Flashesa b Soft Lockout Recycle count exceeds 5 on this call for heat last failure was Limit Circuit Opened D...

Страница 15: ...hes Limit string open Combustion air blower is energized If control system includes ST9160 Electronic Fan Timer the heat speed circulating air fan will be energized System waits for limit string to close then initiates a new ignition sequence 1 Open high temperature or auxiliary limit switch 2 Open manual reset or auto reset burner rollout switch in the limit circuit 3 Limit and rollout switch cir...

Страница 16: ... 2 Low line voltage power supply 3 Airflow proving switch operation tubing wiring 4 Obstructions or restrictions in appliance air intake or exhaust flue system that prevent proper combustion airflow 5 Other devices such as auxiliary limits in the airflow proving circuits 6 4 Flashesa b Soft Lockout Recycle count exceeds 5 on this call for heat last failure was Limit Circuit Opened During Run 1 Ope...

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