Instructions / Assembly

ManualsBrandsWatts ManualsPlumbing3/4 in. Lead Free Copper Silicon Alloy Body Tankless Water Heater Valve Set with VersaFit Technology

IS-LFTWHG2-FT/FS

Installation Instructions

Series LFTWHG2

Tankless Water Heater Valves with

VersaFit™ Technology

Sizes:

⁄4" Service Valve Set

ATTENTION INSTALLER: After installation, please leave

this Instruction Sheet for occupant’s information.

IMPORTANT: Inquire with governing authorities for local

installation requirements.

Fig.4

STOP!

Before connecting any components, be sure to read all

of the tankless water heater manufacturer’s installation

instructions. Failure to follow instructions below can re-

sult in serious injury, death and/or property damage.

1. Identify all components and

orientations before beginning

installation

1. HOT WATER SERVICE VALVE (Fig.1)

Identiﬁed by the red handle insert.

2. COLD WATER SERVICE VALVE (Fig.2)

Identiﬁed by the blue handle insert.

3. PRESSURE RELIEF VALVE (Fig.3)

Identiﬁed by a silver test lever.

Note: ANSI Z21.22 and local codes

govern the installation of pressure

relief valves.

2. Before attaching any components

to the tankless water heater,

attach PRESSURE RELIEF VALVE

to HOT WATER ISOLATION

VALVE (Figure 4)

CAUTION

Do not over tighten

relief valve. Do not tighten more

than one full turn past hand tight.

a. Apply thread sealant to the exposed

threads of the pressure relief valve.

b. Thread the pressure relief valve into

the

⁄4" port on the side of the hot

water valve and hand tighten. Using

a wrench, tighten the pressure relief

valve until the discharge on the pres-

sure relief valve is positioned down-

ward on the isolation valve, as shown

in Figure 4.

Drain Line

Attach this end to

tankless water heater

Attach this end to

tankless water heater

3. Install COLD WATER SERVICE VALVE onto cold water

inlet of tankless water heater

a. Locate the cold water threaded inlet on the tankless water

heater and apply thread sealant to the threads.

b. Slightly loosen the union nut on the top of the cold water

valve so that the union tailpiece rotates freely.

c. Holding the cold water valve beneath the cold water inlet,

thread the union tailpiece onto the inlet and hand tighten.

Using a wrench, tighten the union tailpiece. Next, position

the cold water valve with the purge port pointing forward,

towards the front of the water heater, and hand tighten the

union nut.

d. Tighten the union nut with a wrench, making sure that the

valve does not rotate out of position.

4. Install HOT WATER SERVICE VALVE onto hot water

outlet of tankless water heater

WARNING

There should not be a shutoff located

between the tankless water heater and pressure relief

valve. (See direction arrow in Fig. 5.)

a. Locate the hot water threaded outlet on the tankless water

heater and apply thread sealant to the threads.

b. Slightly loosen the union nut on the top of the hot water

valve so that the union tailpiece rotates freely.

c. Holding the hot water valve beneath the hot water outlet,

thread the union tailpiece onto the outlet and hand tighten.

Using a wrench, tighten the union tailpiece. Next, position

the hot valve with the purge port and pressure relief valve

pointing forward, towards the front of the water heater, and

hand tighten the union nut. Tighten the union nut with a

wrench, making sure that the valve does not rotate out of

position.

Fig.1

Fig.2

Fig.3

TWHG2

WARNING

Read this Manual BEFORE using this equipment.

Failure to read and follow all safety and use information

can result in death, serious personal injury, property

damage, or damage to the equipment.

Keep this Manual for future reference.

For valves with CPVC or PEX end connections do not exceed the

tubing manufacturers pressure and temperature ratings. Refer to the

tubing manufacturers product speciﬁcations for that information.

WARNING

Summary of content (4 pages)

PAGE 1
IS-LFTWHG2-FT/FS Installation Instructions Series LFTWHG2 Tankless Water Heater Valves with VersaFit™ Technology Sizes: 3⁄4" Service Valve Set ! WA R N I N G Read this Manual BEFORE using this equipment. Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment. Keep this Manual for future reference.
PAGE 2
Hot Service Valve Purge Port Flow Data 5. Connect water line and pressure relief drain line a. Attach the HOT water supply line to the ¾" threaded connection on the HOT WATER VALVE using thread sealant on the threads Fig.5 of the water fitting, sweat copper Attach this end pipe on TWH-FS models. to tankless b. Attach the COLD water supply line water heater to the ¾" threaded connection on the COLD WATER VALVE using thread sealant on the threads of the water fitting, sweat copper pipe on TWH-FS models.
PAGE 3
9. Modular Installations When used in modular installations, the LFTWHG2 hot valve assembly can be field configured to provide hydraulic isolation of units that need service or repair while other units remain operating. To provide hydraulic isolation from a pressurized hot water main, the pressure-activated seal must be rotated 180 degrees from the bottom port to the upper port as follows; 1. With the valve in the closed position (handle facing forwards), remove handle plug, handle and stop plate; 2.
PAGE 4
Limited Warranty: Watts (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT.