Reliant FVIR GAS WATER HEATER Operations Instructions download pdf (Page 17)

Tee fitting for vertical hot

water supply lines.

Hot water

supply to

house

From HOT

outlet on

water heater

Hot water

supply to

heating

unit

Supplemental instructions for gas water heaters installed

in potable/space heating applications

Local codes or plumbing authority requirements may vary from the instructions or diagrams provided in

this manual and take precedent over these instructions.

Tee fitting for horizontal hot

water supply lines.

From HOT

outlet on

water heater

Hot water

supply to

house

Hot water supply

to heating unit

Combination Potable and Space Heating Application

Tee fitting must be installed as shown.

This ensures that any air in the water

lines will be purged through the domestic

water faucets and showers.

DANGER: When this system requires

water for space heating at elevated

temperatures (above 125°F [52°C.]), a

mixing valve complying with the

Standard for Temperature Actuated

Mixing Valves for Hot Water Distribution

Systems, ASSE 1017 must be installed in

the hot water supply line to the house in

order to reduce the scald hazard

potential.

DANGER: Any piping or components

used in the installation of this water

heater in a combination potable and

space heating application must be

suitable for use with drinking water.

NOTICE: Suitable for (potable) water

heating and space heating applications.

DO NOT use for space heating applica-

tion only.

DANGER: If this water heater is

installed in an application intended to

supply domestic hot water needs and

hot water for space heating purposes,

do not connect the heater to an existing

heating unit or components of a heating

system that have previously been used

with a non drinking water system. Toxic

chemicals such as those used for boiler

treatment may be present and will

contaminate the drinking water supply

causing possible health risks. Never

introduce toxic chemicals, such as those

used for boiler treatment, into this

system.

Typical Piping Diagram for Combination Potable/Space Heating Installation

Spring loaded check valve in heating unit

hot water supply line and cold water return

line (not supplied with water heater)

NOTE: This check valve is incorporated

in some heating units. Refer to the

installation instructions supplied with

specific heating unit to determine if it is

required.

Isolation valve in

cold water return line

from heating unit (not

supplied with water

heater)

Nominal 3/4" size mixing or tempering valve

(refer to warning above). Follow mixing or

tempering valve manufacturer’s instructions for

installation of the valve.

Temperature and pressure relief

valve discharge line

Air Handler

Drain valve

(not supplied with

water heater)

Hot water

to space heater

Temperature and Pressure Relief

Valve, tie to location approved by

local code

Isolation valve in hot water supply line

to heating unit (not supplied with water

heater)

3/4" cold water supply

3/4" Tempered

domestic hot water

supply to house.

Gas line to water heater

6” Air Gap

Combustion Air Inlet

Openings

2 Gallon Thermal

Expansion Tank (if

required-not supplied

with water heater)

Air vent

Heat Trap

6” Min.

3/4" Shut-Off Valve (Typ.)

3/4" Check Valve with 1/8" Hole

Pressure Gauge

3/4" Shut-Off Valve (Typ.)

3/4" Shut-

Off Valve

(Typ.)

Hot water coil

All bronze pump.

Check valve

internal in pump.

Air bleed valve.

Water Sample Tap.

FAN

OFF

HEAT

COOL

To HVAC Unit.

Electronically controlled pump timer.

Activates every 6 hours for 60 seconds.

Wire to bronze pump.

3/4" HWS & HWR

to Heating Coil.

Minimum of 2'-0" developed length

of 3/4" pipe.

Water Heater drain pan installed in

accordance with the Local and State

Code

Water Heater to be in accordance with

the Local and State Energy Code

Gas Fired

Water Heater

Gas Direct Vent discharge

must comply with Local

and State Code

Vacuum Relief Valve

(Not Supplied)

If required, install per local codes

and valve manufacturer’s

instructions.

120° to 130°F

140°F

See diagrams above for proper

pipe application for vertical

or horizontal supply lines.

Water heater jacket

All water piping shall be insulated

in accordance with Local and State

Energy Code.

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Reliant FVIR GAS WATER HEATER Operations Instructions Page 17

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