User Guide

ManualsBrandsHoneywell ManualsGas Valves & ControlsDiaphragm Gas Valve, Normally Closed, 2-1/2" NPT Pipe Size, 1 max. psi, 24 vac

PRODUCT DATA

® U.S. Registered Trademark

60-2080—9

V48A,F,J; V88A,J

Diaphragm Gas Valves

APPLICATION

The V48 and V88 are solenoid-operated diaphragm valves

suitable for LP (Liquefied Petroleum), natural, and

manufactured gases. They are normally used on atmospheric

boilers, commercial water heaters, and rooftop heaters.

FEATURES

• Line voltage, 2-wire thermostat or controller used with

a V48; V88 used with 24V thermostat.

• Valves provide slow opening and fast closing.

• Two second maximum 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 final

shutoff service.

• Adjustable or fixed bleed orifices available for

installation by OEM.

• Valve position indicator on 1-1/4 in. V48A2227 and 2 in.

V48F1103 Valves.

Contents

Application ........................................................................ 1

Features ........................................................................... 1

Specifications ................................................................... 2

Ordering Information ........................................................ 2

Installation ........................................................................ 4

Wiring ............................................................................... 6

Operation .......................................................................... 8

Checkout and Troubleshooting ......................................... 9

Service Information .......................................................... 10

Summary of content (12 pages)

PAGE 1
V48A,F,J; V88A,J Diaphragm Gas Valves PRODUCT DATA FEATURES • Line voltage, 2-wire thermostat or controller used with a V48; V88 used with 24V thermostat. • Valves provide slow opening and fast closing. • Two second maximum 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.
PAGE 2
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES SPECIFICATIONS Models: V48A (120 Vac) or V88A (24 Vac) solenoid operated diaphragm valves for 1/2 or 1 psi (3.4 or 6.9 kPa) maximum operating pressure. V48F (120 Vac) solenoid operated diaphragm valve for 5 psi (34.5 kPa) maximum operating pressure. V48J (120 Vac) or V88J (24 Vac) solenoid operated diaphragm valves for 1 psi (6.9 kPa) operating pressure and 150°F maximum ambient temperature. Thermostat Heat Anticipator Setting: For 60 Hz V88, set at 0.6A.
PAGE 3
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES Table 2. Models Available. Maximum Operating Pressure Model V48A Voltage and Frequency 100V, 50 Hz 120V, 60 Hz psi 1/2 3.4 1, 1-1/4, 1-1/2 1 6.9 2 1/2 3.4 3/4, 1, 1-1/4, 1-1/2 1 6.9 1, 1-1/4, 1-1/2, 2, 2-1/2, 3 220V, 50 Hz 240V, 50 Hz V48F V48J Thread Typea Pipe Size (in.) kPa BSP.PI NPT 1, 1-1/4, 1-1/2, 2, 3 BSP.PI 2 NPT 120V, 60 Hz 5 34.5 2 120V, 60 Hz 1 6.9 3/4, 1, 1-1/4, 1-1/2, 2 1/2 3.4 3/4, 1, 1-1/4, 1-1/2 1 6.
PAGE 4
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES Accessories: Transformer AT72D: (40 VA) for all V88 models. 126590 Adjustable Bleed Valve Assembly: Consists of adjustable bleed valve with sleeve and compression nut for connecting to 1/4 in. tubing; see Fig. 8. Bleed Orifice: Fixed (see Table 2 for appropriate size): 124674 Orifice: 0.011 in. (0.28 mm) diameter. 122160 Orifice: 0.018 in. (0.46 mm) diameter. 1. Check the burner nameplate for (a) the type of gas used, and (b) the gas flow capacity.
PAGE 5
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES PRESSURE DROP VS. CAPACITY FOR 0.64 SP GR. GAS [2.5] 10 9 [2.0] 8 7 A.G.A.RATING FOR 0.64 SP. GR. GAS AT 1 IN. PRESSURE DROP [1.5] 6 5 VALVE SIZE 668 cf/h 1021 cf/h 2100 cf/h 2400 cf/h 4178 cf/h 5100 cf/h 5562 cf/h 3/4 IN. 1 IN. 1-1/4 IN. 1-1/2 IN. 2 IN. 2-1/2 IN. 3 IN. [1.0] 4 [0.75] 3 2.5 CAPACITY [0.5] 2 PRESSURE DROP—INCHES W.C. [kPa] 1.5 3 2-1/2 [0.25] 1.0 2 0.9 [0.2] 0.8 1-1/2 0.7 1-1/4 [0.15] 0.6 1 3/4 0.5 [0.1] 0.4 [0.075] 0.3 0.25 [0.05] 0.
PAGE 6
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES 2 CLEAN THREADS, MODERATE AMOUNT OF DOPE EXCESS DOPE MAY BLOCK DISC OFF VALVE SEAT WRONG TOO LONG, NORMAL FULL THREAD RIGHT NORMAL FULL THREAD RIGHT NEVER USE VALVE AS A HANDLE LOOSE CHIPS RIGHT VISE GRIPS END NEXT TO PIPE BEING INSERTED WRONG DISTORTS VALVE SEAT REAM PIPE, BLOW OUT CHIPS (THEY MAY LODGE ON SEAT) WRONG TOO LONG, DISTORTS VALVE SEAT BLEED GAS TAPPING WRONG WRENCH HERE STRAINS VALVE BODY RIGHT PILOT GAS TAPPING WRENCH CORRECTLY APPLI
PAGE 7
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES 3. For normal installations, use moisture-resistant No. 14 wire suitable for at least 167°F (75°C) if using a flame safeguard primary control, or for at least 194°F (90°C) if using a flame safeguard programming control. For high temperature installation, use moisture-resistant No. 14 wire selected for a temperature rating above the maximum operating temperature. Check the power supply circuit. The voltage and frequency must match those of the valve. Refer to Fig.
PAGE 8
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES OPERATION Operation of the V48 and V88 Valves (Fig. 10) When the controller is not calling for heat, the coil is de-energized. The plunger in the 3-way actuator is in the DOWN position so the bleed port is closed and the supply port is open. Gas flows into the top part of the valve. The gas pressure on top of the diaphragm, the weight, and the spring hold the valve closed.
PAGE 9
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES of the valve flows out through the bleed port. This reduces the pressure on top of the diaphragm, allowing the gas pressure below to lift the diaphragm and open the valve. CHECKOUT AND TROUBLESHOOTING WARNING When all the gas has bled off the top of the diaphragm, the valve is fully open, permitting gas flow to the main burner. Explosion Hazard. Can cause severe injury, death or property damage. Do not allow fuel to accumulate in the combustion chamber.
PAGE 10
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES 4. 5. 6. 7. If there is still no voltage at the actuator, make sure all the appropriate contacts in the thermostat (or controller), limit(s), and flame safeguard control are closed. If one or more is open, determine the cause(s) and correct the con-dition(s) before proceeding. If there is proper voltage at the valve actuator but the valve still does not open, first check that the gas pressure at the valve is normal.
PAGE 11
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES WRAPAROUND METAL COVER HOLDING NUT COIL ASSEMBLY COIL ASSEMBLY CARDBOARD INSULATOR HOOKED TOGETHER GROUNDING SCREW CARDBOARD INSULATOR METAL BASE ACTUATOR HOUSING BLACK LEADWIRES 2 TORX 20 SCREWS HOLDING ACTUATOR HOUSING M7304 Fig. 15. Coil assembly, insulator, and cover. M7301 CAUTION Fig. 13. Internal view of actuator housing. Equipment Damage Hazard. Operation without proper checkout can damage the equipment. 1.
PAGE 12
V48A,F,J; V88A,J DIAPHRAGM GAS VALVES 10. A B C 4 GAS SUPPLY D LEAK TEST TAP E DOWNSTREAM MANUAL GAS COCK BURNER UPSTREAM MANUAL GAS COCK PRV 2 SSOV 3 1/4 IN. (6 MM) FLEXIBLE TUBING 1/4 IN. (6 MM) ALUMINUM OR COPPER PILOT TUBING F CAN ALSO BE A PERMANENT PETCOCK. 2 PRV = PRESSURE REGULATING VALVE. 3 SSOV = SAFETY SHUTOFF VALVE. 4 USE THE DOWNSTREAM TAP ON THE SS0V. JAR OR GLASS WITH WATER CUT AT 45 DEGREE ANGLE 2. 3. 4. 5. 6. 7. 8. 9. V48/V88 Pipe Size (in.