Potable/Space Heating - Rheem GG50T06PVT Use And Care Manual

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.
Hot water
supply to
house
Hot water
supply to
From HOT
heating
outlet on
unit
water heater
Tee fitting for vertical hot water
supply lines
From HOT
Hot water
outlet on
supply to
water heater
house
Hot water supply
to heating unit
Tee fitting for horizontal hot
water supply lines
Typical Piping Diagram for Combination Potable/Space Heating Installation
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.
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 hot water supply line
to heating unit (not supplied with water
heater)
See diagrams above for proper
pipe application for vertical
or horizontal supply lines.
Temperature and Pressure Relief
Valve, tie to location approved by
local code
Gas line to water heater
Temperature and pressure relief
valve discharge line
Gas Control (Thermostat)
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
All water piping shall be insulated
in accordance with Local and State
Energy Code.
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 or tempering valve
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.
Minimum of 2'-0" developed length of
3/4" pipe.
Air vent
3/4"
Shut-Off
Valve
(Typ.)
Gas Fired
Water Heater
Gas Direct Vent discharge
must comply with Local
and State Code
Combustion Air Inlet
Openings
DANGER:
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.
Notice: 50' - 0" maximum distance
from water heater to fan coil
(developed length) is required for
Massachusetts State.
Pressure Gauge
3/4" Tempered
domestic hot water
supply to house.
3/4" Shut-Off Valve (Typ.)
Heat Trap
6" Min.
2 Gallon Thermal
Expansion Tank (if
required-not supplied
with water heater)
3/4" HWS & HWR
to Heating Coil.
Drain valve
(not supplied with
water heater)
Isolation valve in cold
water return line from
heating unit (not
supplied with water
heater)
Vacuum Relief Valve
(Not Supplied)
If required, install per local codes
and valve manufacturer's
instructions.
6" Air Gap
If this water heater is
3/4" Check Valve with 1/8" Hole
3/4" Shut-Off Valve (Typ.)
3/4" cold water supply
Hot water coil
All bronze pump.
Check valve
internal in pump.
Air bleed valve.
Water Sample Tap.
Air Handler
Electronically controlled pump timer.
Activates every 6 hours for 60 seconds.
Wire to bronze pump.
Hot water
to space
heater
To HVAC
Unit.
T
FAN
ON
OFF
HEAT
COOL
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