HYDROGUARD
®
Thermostatic Tempering Valves
ASSE 1017 Series LM490, LFLM490, LM490-10 and LFLM490-10
Installation Instructions
IS-P-LM490-LM490-10
NOTE:
Installation should be in accordance with accept-
ed plumbing practices. Flush all pipes thoroughly before
installation. Installation and field adjustment are the
responsibility of the installer.
1. Mark pipe as shown.
This is pipe insertion depth.
2. Clean pipe end.
1. Remove collet clip.
2. Depress collet.
3. Pull tubing from tailpiece .
3. If using PEX tubing, insert pipe stiff-
ener (provided) into end of pipe.
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.
PEX tubing only
Pipe Stiffener
Tail Piece
Mark
Collet clip
Collet depressed
1
1
/
2
in. (38.1mm)
1
3
/
4
in. (44.45mm)
1
7
/
8
in. (47.63mm)
1
/
2
in.Pipe (12.7mm)
3
/
4
in.Pipe (19.05mm)
1 in.Pipe (25.4mm)
Vacuum Relief Valve
Temperatur
e Gauge
Cold
Cold
LM490, LFLM490,
LM490-10, LFLM490-10
8" - 10"
Temper
ed
Hot
Hot to Appliances
T&P
Relief Valve
H
C
M
Cold
Figure 1.
Domestic Hot Water Application
IMPORTANT:
To prolong the life of the series LM490, LFLM490, LM490-10
or LFLM490-10 valves, it is recommended that the hot water
inlet to the valve should be 8-10”(200-305 mm) below the hot
water inlets.
1. Close both hot and cold water shutoff valves upstream of
the tempering valve.
2. Bleed pressure from the system.
3. Route copper tubing or piping to fit valve dimensions.
4. For valves with Quick-Connect tailpieces refer to "Quick-
Connect Installation" instructions.
5. Remove tailpieces from the valve and make sure union
nuts are over the tubing/piping before connecting to the
tailpiece.
NOTE:
If soldering, remove unions and gaskets from valve
body prior to soldering to prevent damage to valve from
excessive heat.
6. Flush piping again, install valve using filter gasket on hot
and cold water inlets and fiber gasket on mixed water
outlet.
7. Turn on the cold and hot water. If any leak are observed,
tighten connections as necessary to stop leak before pro-
ceeding.
LM490-5
LFLM490-1
Installation Instructions
n
Quick-Connect Installation
n
TO CONNECT
TO DISCONNECT
Advanced Thermal
Activation
