Honeywell V48F User Manual

1 60-2080—8
V48A,F,J; V88A,J
Diaphragm Gas Valves
The V48 and V88 are solenoid-operated dia-
phragm valves suitable for LP (Liquefied Petro-
leum), natural, and manufactured gases. They are
normally used on atmospheric boilers, commercial
water heaters, and rooftop heaters.
CONTENTS
Specifications ............................................... 2
Ordering Information .................................. 2
Installation ................................................... 5
Operation ..................................................... 8
Checkout and Troubleshooting ................... 9
Service Information ................................... 10
F.P. • Rev. 9-94 • ©Honeywell Inc. 1994 • Form Number 60-2080—8
■ 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 for 2 through
3 in. valves.
■ One second maximum closing time for 3/4 through
1-1/2 in. valves.
■ V48J, V88J rated for 150° F 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 in-
stallation by OEM.
■ Valve position indicator on 1-1/4 in. V48A2227 and
2 in. V48F1103 Valves.

Honeywell V48F Specifications

General

Brand	Honeywell
Model	V48F
Category	Control Unit
Language	English

Summary

Product Specifications and Sizing

Valve Models and Ratings

Details different V48/V88 valve models, voltage, pressure, and temperature specifications.

Technical Specifications Overview

Covers gas type, capacity, materials, opening/closing times, and power consumption.

Approvals and Optional Features

Lists safety certifications and optional valve position indicators.

Model Availability and Thread Types

Details available models, operating pressures, pipe sizes, and thread types (BSP.PI, NPT).

Gas Valve Sizing Guide

Provides instructions, charts, and conversion factors for selecting the correct valve size.

Installation Procedures

General Installation Precautions

Essential safety and preparation steps before installing the gas valve.

Piping Preparation and Valve Mounting

Guides on preparing pipe threads and correctly mounting the valve in the pipeline.

Gas Tubing Connections

Instructions for connecting pilot and bleed gas tubing to the valve.

Electrical Wiring of the Valve

Details on wiring the valve actuator, including diagrams and safety notes.

Optional Bleed Component Installation

Steps for installing optional adjustable bleed valves or fixed bleed orifices.

Operation, Checkout, and Troubleshooting

Valve Operation Mechanism

Explains how the valve opens and closes based on controller signals and gas pressure.

Valve Position Indicator Function

Describes the optional indicator that shows the valve's open or closed status.

System Checkout Procedure

Steps to verify the valve's correct functioning after installation.

Troubleshooting Common Issues

Guides on diagnosing and resolving common problems like failure to open or close.

Service Information

Scheduled Maintenance

Recommendations for periodic inspection and maintenance of the gas valve.

Replacing the Coil Assembly

Detailed, step-by-step instructions for replacing the valve's solenoid coil.