Watts 210-5 - Manual

IS-210-5
Series LF210-5
Temperature Gas Shutoff Valves
Installation Instructions
GAS CAPACITY
C.S.A. listed ratings of this valve are:
For use with natural gas 150,000 BTU/hr.
For use with liquified petroleum gas
243,000 BTU/hr.
NOTE: See C.S.A. directory for adjust-
ment factors when used with manufac-
tured, mixed and L.P. gas-air mixtures.
Three acceptable positions for installing are
shown in sketches below. Figure 1 instal-
lation is preferred used in conjunction with
T&P relief valve.
*A pressure relief valve must be installed
as shown to prevent excess pressure by
thermal expansion. There must be no valve
between the relief valve and heater. Relief
valve must be piped to a suitable drain.
Relief valve must be located in an area that
is not subject to freezing. Removal of the
factory installed T&P valve may void
water heater manufacturer’s warranty.
DO NOT INSTALL IN THE COLD WATER LINE.
This Shutoff is an emergency device and will operate only when water temperature
approaches a maximum safe level of approximately 210°F. When it shuts off the gas to
the burner, some trouble with the operating controls is indicated. The heater installation
should be checked by a qualified service technician or licensed plumbing contractor
before being put back into service.
After operating from high temperature, the Shutoff must be manually reset (opened).
This is done by pressing on the “Reset” button, pushing it in as far as it will go (see
instructions below). Tank water temperatures must cool several degrees before valve
can be reset after operating. If, after pressing reset button, valve does not stay open
allowing gas to flow to the burner, insufficient cooling of the water is the probable
cause.
CAUTION: WHEN GAS SHUTOFF OPERATES, IT SHUTS OFF GAS SUPPLY TO
BOTH MAIN BURNER AND PILOT.
Before resetting Gas Shutoff, be sure main gas valve at the heater is shut off as well as gas
to the pilot.
After resetting Gas Shutoff Valve, proceed in lighting heater as for new installation.
This valve is not adjustable. It is factory adjusted to operate before the water temperature
exceeds 210°F.
Do not tamper with device in any way.
This Gas shutoff should be installed so that the temperature sensing element is located in the
water within the upper 6" of the tank.
Water Heaters without factory installed T&P alternate *
Fig. 3
Pressure Relief
Valve Alternate
Installation
Gas From
Supply
Cold
Drain Tube
Pressure Relief Valve
Hot
Drain Tube
Series
LF210-5
Gas To Burner
To Bottom Supply
Water Heaters equipped with T&P valve
Fig. 1
Gas From
Supply
Cold
T&P Relief Valve
Hot
Drain Tube
Series
LF210-5
Gas To Burner
LF210-5 M2 LFL210-5 M2
LFLL210-5 M2 LFLLL210-5 M2
Fig. 2
Gas From
Supply
Drain Tube
Hot
Series LF210-5
Gas To Burner
Pressure Relief Valve
Pressure Relief Valve
Alternate Installation
Water Heaters without factory installed T&P *
Cold
Drain Tube