White Rodgers 37-6334a installation instructions Installation Instructions, Description

COMPACT ZONE VALVES

2-WIRE, 2-WAY

For use on systems up to 142 PSI

INSTALLATION INSTRUCTIONS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE IN- STALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

The compact zone valves are 2-way straight through, available as a normally open or normally closed valve. The zone valves come with or without a SPST normally open auxiliary switch and feature a swing-type ball valve, which is designed to rotate which causes the ball plug to seat on a different section of its surface on each closing. They are available in several piping options, sweat, NPT, inverted flare and flare fitting end connections for standard copper tubing, for use with 2-wire thermostats. These zone valves provide a low cost system of zoned temperature control wherever hot water is the heating medium. In new construction, the piping system can be laid out to produce any number of independent temperature controlled zones by use of these valves. In existing buildings, a variety of zone combina- tions can be obtained, depending on the particular piping layout. Each zone requires one zone valve and one thermostat, but only one circulator is normally required for the entire system.

DESCRIPTION

Flare Fittings

Available Separately

This compact zone valve is intended for use with a low voltage system; do not use this zone valve with a millivolt or line voltage system. If in doubt about whether your wiring is millivolt, line or low voltage, have it inspected by a qualified heating contractor or electrician.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and ordinances.

PRECAUTIONS

CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box, until installation is complete.

CAUTION

To prevent injuries from scalding always drain system before installing or removing valve. To avoid gear damage operate lever slowly.

WARNING

Do not use on circuits exceeding specified voltages. Higher voltages will damage control and could cause shock or fire hazard.

All guarantees are void if these specifications are exceeded.

SPECIFICATIONS

Maximum System Pressure: 142 PSI

Differential Across Valve: 20 PSI

Maximum Water Temperature: 230°F

Minimum Water Temperature: 41°F

Maximum Ambiant Temperature: 140°F

Approx. Time Cycle: 10 seconds from full close to full open; 4 seconds from full open to full close.

Electrical Rating:

Valve motor – 0.35A @ 25VAC, 50/60 Hz., 6 W nominal Auxiliary switch: 3.0A Max. @ 25VAC

Thermostat: Use two-wire heating thermostat, .35A heat anticipation is required.

Flow Coefficient - Cv Rating: 1/2" valves – 3.5 Cv (3.0 Kv) 3/4" valves – 3.5 Cv (3.0 Kv)

1" valves – 3.5 Cv (3.0 Kv)

WHITE-RODGERS EMERSON ELECTRIC CO. 9797 Reavis Road

St. Louis, MO 63123-5398 www.white-rodgers.com

MOUNTING POSITIONS:

Upright or 0° to 90° from upright

		INLET
UPRIGHT	LEFT OR RIGHT	UP OR DOWN
		360°
		MAN	AUTO

Fig. 1 Zone valve mounting positions

PART NO. 37-6334A

0142