Hydromax ™ Plumbing; Domestic Water Piping; Boiler Piping - Amtrol HYDROMAX HM-41L Installation & Operation Manual

DOMESTIC WATER PIPING

1. Connect the cold water supply to the pipe labeled
COLD WATER.
2. Connect the HOT WATER piping to the domestic hot
water system.
3. When all domestic water piping is complete, open the cold water
supply and allow some water to enter the tank. Look and listen
for signs of leaks and repair as necessary before continuing.
Note: If installing on a city supply, a properly sized thermal expansion
tank is required and should be installed in accordance with the
product installation manual.
Note: If a water heater is installed in a closed water supply system,
such as one having a back-flow preventer in the cold water supply,
means shall be provided to control thermal expansion. Contact
the water supplier or local plumbing inspector on how to control
this situation.
Note: If an external electrical source is utilized, the appliance, when
installed,must be electrically grounded in accordance with local
codes or, in the absence of local codes, with the National Electrical
Code, ANSI/NFPA 70.
Note: The thermostat is adjusted to 120° F, when shipped from
the factory.
4. Install the blowdown tube on the T&P relief valve outlet.
Plumb to within 6 inches above a floor drain or as directed by
plumbing code.
Clearance From Combustible Surfaces
LEFT SIDE . . . . . . . . . . . 1"
RIGHT SIDE. . . . . . . . . . 1"
TOP . . . . . . . . . . . . . . . . 9"
BLOWDOWN
TUBE
REAR VIEW
(FOR CLARITY)
4. HYDROMAX
REAR . . . . . . . . . . . . . . . 1"
FLOOR . . . . . . . . . . . . . . 0"
FRONT . . . . . . . . . . . . . . 1"
WIRING AND AQUASTAT
ON FRONT CAP HALF
BOILER SUPPL Y
COLD WATER HOT WATER
SUPPLY OUTLET
BOILER RETURN
TOP VIEW
FROM FRONT
DRAIN
Plumbing
™
Do not screw pipe hangers or other hardware into the
exterior of the tank.

BOILER PIPING

1. Plumb the circulator or zone valve on the BOILER
SUPPLY line.
2. Pipe the BOILER RETURN connection to the boiler return line.
heating circulators. This may require moving the heating
circulator off the boiler tapping on packaged boilers.
Failure to do so will result in overheating and tank
damage when the heating system is in operation.
3. Install a weighted flow check on the boiler return line. This is
not necessary on systems utilizing a zone valve to control the
water heater temperature.
4. After completing the boiler piping, slowly open the boiler fill
valve and pressurize the water heater loop. Check for leaks
and repair as necessary. Proceed to the appropriate wiring
section in this manual.
than 15 psig). An explosion could occur.
Recommended Clearance for Servicing
LEFT. . . . . . . . . . . . . . . 12"
RIGHT . . . . . . . . . . . . . 12"
FRONT . . . . . . . . . . . . . 30"
TEMPERATURE
SENSOR WELL
PIPING USING ZONE VALVE
-4-
Do not drill, puncture or otherwise
penetrate the steel outer tank shell.
Be sure the return line is NOT
plumbed to the suction side of any
EXPLOSION HAZARD. Do not install to
a high pressure steam boiler (greater
HEAD ROOM . . . . . . . 36"
REAR . . . . . . . . . . . . . . 1"