1
Recirculation S stem
Combination Potable ater and Space eating S stem
Cold ater
Suppl
solation
it(*4)
Gas Suppl
uastat(* )
Pump Control Signal(*2)
Rela for Pump
(if larger than 85 atts)
ot ater
ptional 8-10 Gallon
Storage Tank
(To alleviate cold water sandwich)
Globe
Valve
Pump(*1)
pansion Tank
( nstall according
to local code)
i tures
ot ater
Return
R
Pump
120V C
105
eutral
Ground
ive
S
solation
it(*1)
Gas Suppl
ackflow Preventer
(optional)
Check
Valve(* )
Cold ater
Suppl
ptional
pansion Tank(* )
Mi ing Valve(*5)
ot ater
Pump(*2)
low Switch(*4)
i tures
ir andler
otes
1. Si e the pump to provide a ma imum of 2 GPM
(7.5 min.) through the s stem at 10 ft ( m) of
head plus piping losses.
d ust the flow using a globe valve and verif the
flow rate with the maintenance monitors.
2. Pump Control Signal is the preferred method
to control the recirculation pump.
or pumps larger than 85
a rela connection
must be used. f the Pump Control Signal is not
used an
uastat ma be used to control the
pump.
. Use an
uastat if the water heater is not controlling
the pump.
Set the
uastat to 10 (5 C) below the set
output temperature.
4. orit recommends the use of an solation it
with the installation.
These kits include an integrated shut-off and service
valve with unions and a pressure relief valve.
otes
1. orit recommends the use of an solation it with
the installation.
These kits include an integrated shut-off and service
valve with unions and a pressure relief valve.
2. Si e the pump to provide a ma imum of
GPM
(11. min.) with a head pressure e ual to the loss
through the water heater and ir andler.
. Check valve re uired if it is not included with the pump.
4. Set the flow switch to deactivate the ir andler when
the domestic hot water flow reaches GPM (11. min.).
d ust as necessar to prevent c cling.
5. f the s stem re uires water for space heating at a higher
temperature than for other uses means such as a
mi ing valve shall be provided to temper the water for
the other uses to help prevent scalding.
7. The water heater cannot be used for space heating
applications onl .
8. nl P T
water ma be plumbed through
the water heater.
.
pansion tank re uired if a backflow preventer is installed.
Use one well uastat
(Model 00
or 00 C)
uastat iring
R T
Tankless Gas
ater eater
R T
Tankless Gas
ater eater
11.
Plumbing Applications
