Taco Taco GT User manual

Instruction Sheet

Taco GT Flow Control Valve

556-G3, 557-G3 5101-G3

IS100-4.4

APPLICATION:

SU ERSEDES: March 15, 1983 EFFECTIVE: July 5, 2018

lant ID# 001-393

1. The valve may be installed in any position except upside down; in other words the power head should not be below the valve.

2. The valve should be installed in a clean water system. Sand or other particles may cause the valve to leak.

3. The valve should be installed indoors, GT valves for indoor installation only.

4. Install with the arrow on the valve body pointing in the directlon of water flow.

5. A sweat connection valve should have its power head removed before heating the connections. The valve can be sweat into the line

without further disassembly provided care is taken to prevent overheating. Follow these simple instructions:

(1) Use a torch with a sharp, pointed flame.

(2) Clean surfaces thoroughly and use a good grade of flux.

(3) Use of a solder with a melting point below 600F is recommended

(4) Avoid excessive use of flux.

6. Installation over a drain pan is recommended in locations where a water leak can cause damage.

7. Typical wiring diagram:

IMPORTANT: If the thermostat has a heat anticipator, remove it from the circuit by moving the setting arm all the way over in the lowest

resistance direction (longest cycle) on top of the screw or terminal.

8. Allow about 90 seconds for the valve to fully open or close. The valve avoids water hammer by opening and closing slowly.

Proven Performance – Millions in Use.

Patented Construction

24 VAC Powered with Isolated End Switch

100% Factory Tested

3 Year head, 5 Year Body Warranty on the 570 Series,

The quiet and

Thermostat

Heat Pump

Control Panel

INSTALLATION:

The Taco geothermal water flow control valve is an electrically

operated valve for use in water source heat pump systems. It

opens and closes slowly and smoothly in response to the

action of a controlling heating and/or cooling thermostat.

SPECIFICATION DATA:

•24 volts

•0.9 mps. (1.3 m x. intermittent)

•Temp. r nge 34F (1C) min., 240F (116C) m x.

•Shut off pressure - 65 psi (448kP ) m x.

MOUNTING POSITIONS

4681012141618

556-G3, 5101-G3 3/4" 6.1 0.4 1.0 1.7 2.7 3.9 5.3 6.9 8.7

557-*3

1"7.00.30.71.32.02.94.05.26.6

Pressure Drop Table, PSI

Flow in G.P.M.

Model No

Size

CAUTION: Sand or other contaminants can damage the valves internal components and cause it to

fail prematurely. Precautions must be taken to prevent contaminants from damaging the valve.

HOW TO REPLACE GLAND ASSEMBLY

WARNING: Never remove power unit from valve with power being

supplied to it. Disconnect wire #1, and wait at least four minutes.

Disconnect wire to No. 1 terminal of power head and wait at least four minutes.

Twist power head clockwise and lift it from valve.

Remove the four hold down plate screws and remove plate.

Remove the gland with a wrench and replace it. If the whole seat assembly turns, pry it

out so that it can be gripped with a wrench while the gland is removed and replaced

HOW TO REPLACE SEAT ASSEMBLY

Follow steps 1,2 & 3 as outlined for gland removal, and then pry out seat assembly.

TO RE-ASSEMBLE

lace cleaned or new assembly in the valve body and gently rotate until rubber cup

drops into place. At this point the wide flange of the assembly will be approxi mately 1 /8"

above the top of the valve body.

DO NOT FORCE INTO PLACE

ress the hold down plate evenly on the seat assembly until the four screws can be

engaged in the valve. Tighten the screws evenly until the assembly is completely seated.

Test for leaks.

Remount power head and reconnect No. 1 wire.

A Taco Family Company

2017

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