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Honeywell V48A, Product Data, Page: 11 / 12

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Honeywell V48A Product Data Download Page 11

V48A,F,J; V88A,J DIAPHRAGM GAS VALVES

11

60-2080—9

Fig. 13. Internal view of actuator housing.

Fig. 14. Coil assembly fits on plunger tube assembly.

Fig. 15. Coil assembly, insulator, and cover.

CAUTION

Equipment Damage Hazard.

Operation without proper checkout can damage 

the equipment.

1. Do not put the system into service until you have 

satisfactorily completed the following Valve Leak 

Test, all applicable tests described in the Checkout 

section of the Instructions for the flame safeguard 

control, and any other tests required by the burner 

manufacturer.

2. All tests must be performed by a trained, 

experienced flame safeguard control technician.

3. Close all manual fuel shutoff valves as soon as 

trouble occurs.

After the installation is complete, cycle the valve several times 

with the manual fuel shutoff cock closed. Make sure the valve 

and actuator function properly. Also perform the Valve Leak 

Test that follows before putting the valve into service.

Valve Leak Test (Fig. 7)

This is a test for checking the closure tightness of a gas 

safety shutoff valve. It should be performed by qualified 

personnel during the initial startup of a burner system, or 

whenever the valve or valve bonnet is replaced (see 

Service Information section). It is recommended that this 

test also be included in the scheduled inspection and 

maintenance procedures. For a periodic inspection test, 

follow steps 1, 3, 4, 5, 8, 9, 10, 12, 13, 16, and 17.

M7301

HOLDING NUT

COIL ASSEMBLY

GROUNDING 

SCREW

2 TORX 20 

SCREWS HOLDING

ACTUATOR HOUSING

ACTUATOR

HOUSING

COIL ASSEMBLY

PLUNGER TUBE

ASSEMBLY

M7303

WRAPAROUND

METAL COVER

M7304

BLACK LEADWIRES

METAL BASE

CARDBOARD

INSULATOR

COIL

ASSEMBLY

CARDBOARD 

INSULATOR

HOOKED TOGETHER

Summary of Contents for V48A

Page 1: ...mum closing time V48J V88J rated for 150 F 66 C ambient temperature V48F rated for 5 psi lb per sq in 34 5 kPa V48A and V88A rated for either 1 2 or 1 psi 3 4 or 6 9 kPa depending on model V48J and V88J rated for 1 psi 6 9 kPa One model for natural and LP gases Wide range of sizes and capacities Firm closing diaphragm is both weight and spring loaded Valve closes on power failure recommended for f...

Page 2: ...Body Material Die cast aluminum Pilot Tapping see Table 1 for thread type 3 4 through 1 1 2 inch valves 1 8 27 NPT or 1 8 28 BSP PI 2 through 3 inch valves 1 4 18 NPT Bleed Tapping see Table 2 for thread type 1 8 27 NPT or 1 8 28 BSP PI Valve Opening Time Five seconds maximum at 2 oz in 2 0 86 kPa pressure Adjustable bleed valve assembly or fixed bleed orifices available for longer opening time NP...

Page 3: ... 1 1 2 2 110V 50 Hz V88A 24V 60 Hz 1 2 3 4 3 4 1 1 1 4 1 1 2 1 6 9 3 4 1 1 1 4 1 1 2 2 2 1 2 3 V88J 24V 60 Hz 6 9 1 1 1 4 Valve Size in Valve Opening Time seconds No Orifice Orifice No 122160 0 018 in 0 46 mm Orifice No 124674 0 011 in 0 28 mm 1 1 2 3 1 1 4 1 5 6 1 1 2 1 5 6 2 4 15 32 2 1 2 4 23 37 3 5 24 37 1 2 1 2 BLEED TAPPING 1 8 27 NPT OR 1 8 28 BSP PL PILOT TAPING 2 1 8 27 NPT FOR 3 4 THROUG...

Page 4: ...he same size as the first valve INSTALLATION When Installing This Product 1 Read these instructions carefully Failure to follow them could damage the product or cause a hazardous condition 2 Check the ratings given in the instructions and on the product to make sure the product is suitable for your application 3 Installer must be a trained experienced flame safeguard control technician 4 After ins...

Page 5: ...se this may result in gas leakage at the connection 2 Unscrew brass compression fitting from pilot gas tapping Fig 4 Slip the fitting over the tubing and slide out of the way PRESSURE DROP VS CAPACITY FOR 0 64 SP GR GAS A G A RATING FOR 0 64 SP GR GAS AT 1 IN PRESSURE DROP VALVE SIZE CAPACITY 3 4 IN 1 IN 1 1 4 IN 1 1 2 IN 2 IN 2 1 2 IN 3 IN 668 cf h 1021 cf h 2100 cf h 2400 cf h 4178 cf h 5100 cf ...

Page 6: ...nd of bleed tubing to main burner or to outside atmosphere WIRING 1 Disconnect the power supply before making wiring connections to prevent electrical shock and equipment damage Fig 4 Connecting tubing to pilot for bleed gas tapping 2 All wiring must comply with applicable electrical codes ordinances and regulations Use NEC Class 1 line voltage wiring WRONG WRONG WRONG RIGHT 2 CLEAN THREADS MODERA...

Page 7: ...ice Fig 5 Typical wiring diagram for V48 Installation of an Optional Adjustable Bleed Valve Fig 8 NOTE This device is not available for valves with BSP PI threads Screw the 126590 Adjustable Bleed Valve into the tapping marked BLEED Be sure to screw the end with the 1 8 NPT threads into the BLEED tapping Complete the bleed line connection Then alternately energize and de energize the valve actuato...

Page 8: ...nd V88 diaphragm gas valves On a call for heat the controller contacts close and the coil is energized This pulls the plunger to the UP position opening the bleed port and closing the supply port The gas in the top BLEED TAPPING 126590 ADJUSTABLE BLEED VALVE SLEEVE COMPRESSION NUT 1 4 INCH TUBING 7 16 24 UNS ADJUSTING SCREW 7 16 INCH HEX 1 8 27 NPT M7290 BLEED PORT 1 8 27 NPT M7298A 1 8 INCH DIAME...

Page 9: ...ge Do not allow fuel to accumulate in the combustion chamber If fuel is allowed to enter the chamber for longer than a few seconds without igniting an explosive mixture could result CAUTION Equipment Damage Hazard Can cause equipment damage and improper operation 1 Do not put the system into service until you have satisfactorily completed all applicable tests described in the Checkout section of t...

Page 10: ...ard control for more information Replacing the coil assembly Figs 12 through 15 1 Open the master switch to disconnect all power to the valve actuator 2 Loosen the cover screw in the front of the actuator housing Fig 12 and remove the housing cover 3 Disconnect the external wires from the two internal black leadwires Fig 12 4 Remove the two torx screws inside the actuator housing Fig 13 and lift o...

Page 11: ...cycle the valve several times with the manual fuel shutoff cock closed Make sure the valve and actuator function properly Also perform the Valve Leak Test that follows before putting the valve into service Valve Leak Test Fig 7 This is a test for checking the closure tightness of a gas safety shutoff valve It should be performed by qualified personnel during the initial startup of a burner system ...

Page 12: ...xceed the values listed in Table 5 Table 5 Allowable Leakage for V48 V88 Valves a Natural gas multiply air by 1 25 b Bubble leakage Divide natural gas by 573 then multiply by 14 NOTE For international leak test requirements contact the office of the appropriate approval agency After the test 11 Close the upstream manual gas cock A 12 Close the test petcock F remove the test apparatus and replace t...

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